{"id":667,"date":"2026-10-02T13:17:54","date_gmt":"2026-10-02T11:17:54","guid":{"rendered":"https:\/\/www.valfonta.com\/producto\/pressure-reducing-valve-m2\/"},"modified":"2026-10-22T09:21:49","modified_gmt":"2026-10-22T07:21:49","slug":"pressure-reducing-valve-m2","status":"publish","type":"product","link":"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/","title":{"rendered":"M2 diaphragm pressure reducing valve"},"content":{"rendered":"<div class=\"wp-block-group vf-raiz vf-pl-ficha-producto is-layout-flow wp-block-group-is-layout-flow\"><nav class=\"wp-block-group vf-breadcrumbs vfa-aria-label--Breadcrumbs is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a href=\"\/en\/\">Home<\/a><span aria-hidden=\"true\" class=\"vf-sep\">\u203a<\/span><a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">Pressure reducing valves<\/a><span aria-hidden=\"true\" class=\"vf-sep\">\u203a<\/span><span aria-current=\"page\">M2 pressure reducing valve<\/span><\/p><\/nav><article class=\"wp-block-group vf-pdp vfd-model--M2 is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-pdp-hero is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-pdp-title is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-pdp-eyebrow wp-block-paragraph\">Pressure reducing valve \u00b7 Direct-acting diaphragm<\/p><h1 class=\"wp-block-heading\">M2 diaphragm pressure reducing valve<\/h1><\/div><div class=\"wp-block-group vf-pdp-media is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><span class=\"vf-pdp-badge\">From 0.02 barg<\/span><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\" alt=\"M2 diaphragm pressure reducing valve with flanged body and diaphragm actuator\" class=\"wp-image-193\" width=\"700\" height=\"700\" fetchpriority=\"high\"><\/p><\/div><div class=\"wp-block-group vf-pdp-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-lead wp-block-paragraph\">Direct-acting, single-seat, diaphragm-compensated reducing valve that maintains the outlet pressure even when the inlet pressure fluctuates, with no auxiliary power. It regulates from 0.02 to 10 barg on gases, liquids, and steam, from DN15 to DN100.<\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Sizes<\/span><b>DN15 to DN100<\/b><\/li><li><span>Pressure rating<\/span><b>PN16 to PN40 \u00b7 Class 150\/300<\/b><\/li><li><span>Inlet pressure<\/span><b>up to 40 barg <small>25 barg from DN65<\/small><\/b><\/li><li><span>Outlet pressure<\/span><b>0.02 to 10 barg<\/b><\/li><li><span>Temperature<\/span><b>\u221240 to 180 \u00b0C <small>depending on diaphragm<\/small><\/b><\/li><li><span>Kv<\/span><b>3.5 to 115 m\u00b3\/h<\/b><\/li><\/ul><div class=\"wp-block-group vf-pdp-cta is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\">Request a quote<\/a><a class=\"vf-btn vf-btn--sec\" href=\"\/wp-content\/uploads\/2026\/10\/M2-18A-ESP.pdf\" rel=\"noopener\" target=\"_blank\">Download datasheet <small>PDF<\/small><\/a><\/p><\/div><p class=\"vf-pdp-contact wp-block-paragraph\">Questions about sizing? Call <a href=\"tel:+34933720888\">933 720 888<\/a> or email <a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com<\/a>.<\/p><\/div><\/div><ul class=\"vf-pdp-trust wp-block-list\"><li>In-house design and manufacturing in Badalona<\/li><li>ATEX II 2 GD marking for zones 1 and 21<\/li><li>Internal pressure sensing as standard<\/li><li>Recommended spare parts marked in the exploded view<\/li><\/ul><nav class=\"wp-block-group vf-pdp-nav vfa-aria-label--Datasheet%20contents is-layout-flow wp-block-group-is-layout-flow\"><ul class=\"wp-block-list\"><li><a href=\"#aplicaciones\">Applications<\/a><\/li><li><a href=\"#especificaciones\">Specifications<\/a><\/li><li><a href=\"#funcionamiento\">Operation<\/a><\/li><li><a href=\"#instalacion\">Installation<\/a><\/li><li><a href=\"#documentacion\">Documentation<\/a><\/li><li><a href=\"#comparar\">Compare<\/a><\/li><li><a href=\"#preguntas\">FAQ<\/a><\/li><li><a href=\"#solicitar\">Request a quote<\/a><\/li><\/ul><\/nav><section id=\"aplicaciones\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-pdp-two is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">What the M2 is used for<\/h2><p class=\"wp-block-paragraph\">The <strong>M2<\/strong> is a direct-acting <a href=\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\">pressure reducing valve<\/a>: the inlet pressure tends to close it, the adjusting spring opens it, and the diaphragm, reinforced with an intermediate fabric layer, compensates for the outlet pressure. The valve closes when the downstream pressure rises.<\/p><p class=\"wp-block-paragraph\">By changing the actuator and spring, it covers outlet pressures <strong>from 0.02 barg<\/strong>, the lowest in the range after the PRV45. It is supplied with internal pressure sensing, with no external tubing; with steam, it needs a control line and a condensate pot.<\/p><ul class=\"vf-pdp-apps wp-block-list\"><li><b>Chemical laboratories<\/b><span>Stable pressure in laboratory installations.<\/span><\/li><li><b>Water networks<\/b><span>Water distribution and sanitary and industrial installations.<\/span><\/li><li><b>Compressed air<\/b><span>Reducing line pressure to the working value.<\/span><\/li><li><b>Fire protection<\/b><span>Pressure stabilization in the network.<\/span><\/li><li><b>Inert gas<\/b><span>Inert gas control and protection of tank contents against oxidation.<\/span><\/li><li><b>Steam<\/b><span>Up to 180 \u00b0C, with a control line and a water seal pot.<\/span><\/li><\/ul><\/div><aside class=\"wp-block-group vf-pdp-fit is-layout-flow wp-block-group-is-layout-flow\"><h3 class=\"wp-block-heading\">Choose the M2 if\u2026<\/h3><ul class=\"vf-si wp-block-list\"><li>You need low outlet pressures, from 0.02 barg.<\/li><li>You work with gases such as air or nitrogen, liquids, or steam up to 180 \u00b0C.<\/li><li>You are looking for sizes from DN15 to DN100 and up to 40 barg inlet pressure.<\/li><li>You prefer internal pressure sensing, with no control line, on water and gases.<\/li><\/ul><h3 class=\"wp-block-heading\">Choose another model if\u2026<\/h3><ul class=\"vf-no wp-block-list\"><li>The steam exceeds 180 \u00b0C: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> reaches 220 \u00b0C and the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\">PRV44<\/a> 210 \u00b0C.<\/li><li>You need more than DN100 or more than 10 barg outlet pressure: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> goes up to DN150 and 15 barg.<\/li><li>You use steam on DN15\u201350 and do not want a water seal pot: the <a href=\"https:\/\/www.valfonta.com\/en\/product\/bellow-pressure-reducing-valve\/\">M2F<\/a> works up to 200 \u00b0C without one.<\/li><li>You require outlet pressures below 0.02 barg: see the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\">PRV45<\/a>, from 0.01 barg.<\/li><\/ul><\/aside><\/div><\/section><section id=\"especificaciones\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">M2 technical specifications<\/h2><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-tbl\"><table><tbody><tr><th scope=\"row\">Type<\/th><td>Direct-acting, single-seat reducing valve, compensated by diaphragm and plunger<\/td><\/tr><tr><th scope=\"row\">Sizes<\/th><td>DN15 to DN100<\/td><\/tr><tr><th scope=\"row\">Connections<\/th><td>EN PN16, PN25, or PN40 flanges \u00b7 ANSI 150\/300 flanges \u00b7 BSP or NPT thread up to 2\u2033<\/td><\/tr><tr><th scope=\"row\">Pressure rating<\/th><td>PN16 to PN40 \u00b7 Class 150 or 300<\/td><\/tr><tr><th scope=\"row\">Maximum inlet pressure<\/th><td>40 barg (DN15 to DN50) \u00b7 25 barg (DN65 to DN100)<\/td><\/tr><tr><th scope=\"row\">Maximum differential pressure<\/th><td>25 bar from DN15 to DN50; from DN65 to DN100, on request<\/td><\/tr><tr><th scope=\"row\">Outlet pressure<\/th><td>0.02 to 10 barg in several ranges, depending on size and actuator<\/td><\/tr><tr><th scope=\"row\">Kv coefficient<\/th><td>3.5 to 115 m\u00b3\/h depending on DN. Reduced Kv on request<\/td><\/tr><tr><th scope=\"row\">Temperature depending on diaphragm and gaskets<\/th><td>NBR: \u221220 to 80 \u00b0C \u00b7 EPDM: \u221240 to 125 \u00b0C \u00b7 FKM: up to 150 \u00b0C, on request \u00b7 PTFE: \u221240 to 180 \u00b0C, with condensate pot<\/td><\/tr><tr><th scope=\"row\">Fluids<\/th><td>Gases (air, nitrogen\u2026), liquids, and steam<\/td><\/tr><tr><th scope=\"row\">Materials<\/th><td>Body in WCB carbon steel (PN40), CF3M stainless steel (PN40), or RG10 bronze. Internals in AISI 316L stainless steel<\/td><\/tr><tr><th scope=\"row\">Pressure sensing point<\/th><td>Internal as standard. External with 10 \u00d7 1 mm tubing on request, mandatory with steam<\/td><\/tr><tr><th scope=\"row\">Mounting position<\/th><td>Horizontal pipe, actuator facing down (facing up only with gases and liquids up to 80 \u00b0C)<\/td><\/tr><tr><th scope=\"row\">Pressure Equipment Directive<\/th><td>PED 2014\/68\/EU: the nameplate indicates whether CE marking is required<\/td><\/tr><tr><th scope=\"row\">ATEX<\/th><td>II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificate LOM 14.034 U<\/td><\/tr><tr><th scope=\"row\">On request<\/th><td>Stainless steel actuator \u00b7 protective cap for the adjusting stem \u00b7 duplex or super duplex body \u00b7 weld ends<\/td><\/tr><\/tbody><\/table><\/figure><\/div><h3 class=\"wp-block-heading\">Dimensions and weight<\/h3><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-tbl vf-tbl--grid\"><table><thead><tr><th scope=\"col\"><\/th><th scope=\"col\">DN15<\/th><th scope=\"col\">DN20<\/th><th scope=\"col\">DN25<\/th><th scope=\"col\">DN32<\/th><th scope=\"col\">DN40<\/th><th scope=\"col\">DN50<\/th><th scope=\"col\">DN65<\/th><th scope=\"col\">DN80<\/th><th scope=\"col\">DN100<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Kv (m\u00b3\/h)<\/th><td>3,5<\/td><td>5<\/td><td>9<\/td><td>13,5<\/td><td>22<\/td><td>32<\/td><td>57<\/td><td>82<\/td><td>115<\/td><\/tr><tr><th scope=\"row\">Length A (EN)<\/th><td>130<\/td><td>150<\/td><td>160<\/td><td>180<\/td><td>200<\/td><td>230<\/td><td>290<\/td><td>On request<\/td><td>350<\/td><\/tr><tr><th scope=\"row\">Length A (ANSI 150)<\/th><td>\u2013<\/td><td>\u2013<\/td><td>184<\/td><td>\u2013<\/td><td>222<\/td><td>254<\/td><td>276<\/td><td>298,5<\/td><td>352,5<\/td><\/tr><tr><th scope=\"row\">Length A (ANSI 300)<\/th><td>\u2013<\/td><td>\u2013<\/td><td>197<\/td><td>\u2013<\/td><td>235<\/td><td>267<\/td><td>292<\/td><td>317,5<\/td><td>\u2013<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Dimensions in millimeters. Height and weight: contact us.<\/p><h3 class=\"wp-block-heading\">Outlet ranges and actuator diameter (mm)<\/h3><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-tbl vf-tbl--grid\"><table><thead><tr><th scope=\"col\">Range (barg)<\/th><th scope=\"col\">DN15\u201320<\/th><th scope=\"col\">DN25\u201332<\/th><th scope=\"col\">DN40\u201350<\/th><th scope=\"col\">DN65<\/th><th scope=\"col\">DN80<\/th><th scope=\"col\">DN100<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">0,02 \u2013 0,05<\/th><td>350<\/td><td>350<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">0,03 \u2013 0,1<\/th><td>295<\/td><td>295<\/td><td>350<\/td><td>350<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">0,1 \u2013 1<\/th><td>295<\/td><td>295<\/td><td>295<\/td><td>295<\/td><td>295<\/td><td>295<\/td><\/tr><tr><th scope=\"row\">0,2 \u2013 1,5<\/th><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>295<\/td><td>295<\/td><\/tr><tr><th scope=\"row\">0,2 \u2013 2<\/th><td>230<\/td><td>230<\/td><td>230<\/td><td>230<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">0,5 \u2013 2<\/th><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>230<\/td><\/tr><tr><th scope=\"row\">1 \u2013 4<\/th><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>230<\/td><td>230<\/td><\/tr><tr><th scope=\"row\">1 \u2013 6<\/th><td>175<\/td><td>175<\/td><td>175<\/td><td>175<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><tr><th scope=\"row\">3 \u2013 8<\/th><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>\u2013<\/td><td>230<\/td><td>230<\/td><\/tr><tr><th scope=\"row\">3 \u2013 10<\/th><td>175<\/td><td>175<\/td><td>175<\/td><td>175<\/td><td>\u2013<\/td><td>\u2013<\/td><\/tr><\/tbody><\/table><\/figure><\/div><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Exploded view and materials (34 parts)<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-tbl vf-tbl--grid\"><table><thead><tr><th scope=\"col\">No.<\/th><th scope=\"col\">Part<\/th><th scope=\"col\">Material<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">1<\/th><td>Body<\/td><td>RG10, 1.0619 (GS-C25N), or 1.4408 (CF3M)<\/td><\/tr><tr><th scope=\"row\">2<\/th><td>Seat<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">4<\/th><td>Screws<\/td><td>Steel 8.8 or A2-70<\/td><\/tr><tr><th scope=\"row\">5<\/th><td>Gasket <small>(spare part)<\/small><\/td><td>PTFE<\/td><\/tr><tr><th scope=\"row\">6<\/th><td>Screws<\/td><td>A2-70 stainless<\/td><\/tr><tr><th scope=\"row\">7<\/th><td>Nut<\/td><td>A2-70 stainless<\/td><\/tr><tr><th scope=\"row\">8<\/th><td>Upper actuator<\/td><td>Steel sheet 1.0335, epoxy-coated, or 316L stainless<\/td><\/tr><tr><th scope=\"row\">9<\/th><td>Spring support<\/td><td>Galvanized steel sheet 1.0035<\/td><\/tr><tr><th scope=\"row\">10<\/th><td>Adjusting spring<\/td><td>Steel 52SiCrNi5 (epoxy)<\/td><\/tr><tr><th scope=\"row\">11<\/th><td>Adjusting nut<\/td><td>Galvanized steel 8.8<\/td><\/tr><tr><th scope=\"row\">12<\/th><td>Bearing <small>(spare part)<\/small><\/td><td>PTFE+GR<\/td><\/tr><tr><th scope=\"row\">13<\/th><td>Adjusting stem<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">14<\/th><td>Lock washer<\/td><td>A2-70 stainless<\/td><\/tr><tr><th scope=\"row\">15<\/th><td>O-ring <small>(spare part)<\/small><\/td><td>NBR, FKM, or EPDM<\/td><\/tr><tr><th scope=\"row\">16<\/th><td>Nut<\/td><td>A2-70 stainless<\/td><\/tr><tr><th scope=\"row\">17<\/th><td>O-ring <small>(spare part)<\/small><\/td><td>NBR, FKM, or EPDM<\/td><\/tr><tr><th scope=\"row\">18<\/th><td>Stem<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">19<\/th><td>Diaphragm <small>(spare part)<\/small><\/td><td>NBR, EPDM, or FKM (PTFE optional)<\/td><\/tr><tr><th scope=\"row\">20<\/th><td>M8 screw<\/td><td>A2-70 stainless<\/td><\/tr><tr><th scope=\"row\">21<\/th><td>Lower actuator<\/td><td>Steel sheet 1.0335, epoxy-coated, or 316L stainless<\/td><\/tr><tr><th scope=\"row\">22<\/th><td>Lower diaphragm plate<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">23<\/th><td>Plunger guide<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">24<\/th><td>Cover<\/td><td>Galvanized steel 1.1141<\/td><\/tr><tr><th scope=\"row\">25<\/th><td>Gasket <small>(spare part)<\/small><\/td><td>Graphite<\/td><\/tr><tr><th scope=\"row\">26<\/th><td>Compensation plunger <small>(spare part)<\/small><\/td><td>NBR, FKM, EPDM, or PTFE+GR<\/td><\/tr><tr><th scope=\"row\">27<\/th><td>Bushing guide<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">28<\/th><td>Seat <small>(spare part)<\/small><\/td><td>NBR, FKM, EPDM, or PTFE+GR<\/td><\/tr><tr><th scope=\"row\">29<\/th><td>Seat screw<\/td><td>A2-70 stainless<\/td><\/tr><tr><th scope=\"row\">31<\/th><td>Seat holder<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">51<\/th><td>Bushing base<\/td><td>1.4404 (316L)<\/td><\/tr><tr><th scope=\"row\">41<\/th><td>Lower bushing stem (DN100)<\/td><td>316L stainless<\/td><\/tr><tr><th scope=\"row\">42<\/th><td>O-ring (DN100) <small>(spare part)<\/small><\/td><td>NBR, FKM, or EPDM<\/td><\/tr><tr><th scope=\"row\">43<\/th><td>Spring washer (DN100)<\/td><td>316L stainless<\/td><\/tr><tr><th scope=\"row\">44<\/th><td>Screws (DN100)<\/td><td>A2-70 stainless<\/td><\/tr><\/tbody><\/table><\/figure><\/div><\/div><\/details><\/section><section id=\"funcionamiento\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">How the M2 works<\/h2><p class=\"wp-block-paragraph\">Direct-acting: balance between the adjusting spring and the outlet pressure on the diaphragm.<\/p><ol class=\"vf-steps wp-block-list\"><li><b>Closing by inlet pressure.<\/b> The fluid pushes the stem\u2013piston\u2013plunger assembly and the valve closes.<\/li><li><b>Opening by the spring.<\/b> Turning the adjusting screw clockwise compresses the spring, which acts on the diaphragm and the seat and opens the passage.<\/li><li><b>Regulation.<\/b> The valve opens until the set downstream pressure is reached and closes when that pressure rises.<\/li><li><b>Compensation.<\/b> The plunger absorbs inlet pressure variations, and the diaphragm absorbs outlet pressure variations.<\/li><\/ol><p class=\"wp-block-paragraph\">The M2 is not a safety valve: if the installation requires it, add overpressure protection. Piston or diaphragm: see our <a href=\"https:\/\/www.valfonta.com\/en\/blog\/piston-vs-diaphragm\/\">reducing valve comparison<\/a>.<\/p><\/section><section id=\"instalacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">M2 installation<\/h2><p class=\"wp-block-paragraph\">Recommended layout: bypass, shutoff valves, strainer, pressure gauges, and safety valve. On water and gases, internal sensing is sufficient; with steam, the M2 also needs a <strong>control line<\/strong> and a <strong>condensate pot<\/strong> (water seal pot). More detail in <a href=\"https:\/\/www.valfonta.com\/en\/blog\/how-to-install-pressure-reducing-valve\/\">how to install a pressure reducing valve<\/a>.<\/p><div class=\"wp-block-group vf-diagram vf-s-7307c0 vf-t-figure is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-svgw is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><svg aria-label=\"Recommended installation diagram of a pressure reducing valve, with bypass\" role=\"img\" viewbox=\"0 0 900 230\"><path d=\"M20 120 H880\" fill=\"none\" stroke=\"#9aa0a6\" stroke-width=\"6\"><\/path><path d=\"M70 120 V40 H760 V120\" fill=\"none\" stroke=\"#9aa0a6\" stroke-dasharray=\"2 0\" stroke-width=\"4\"><\/path><path d=\"M865 120 l14 0 -10 -7 m10 7 -10 7\" fill=\"none\" stroke=\"#1e2123\" stroke-width=\"3\"><\/path><g><path d=\"M415 40 l-14 -10 v20 z M415 40 l14 -10 v20 z\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"415\" x2=\"415\" y1=\"40\" y2=\"22\"><\/line><rect fill=\"#1e2123\" height=\"4\" width=\"16\" x=\"407\" y=\"18\"><\/rect><circle cx=\"415\" cy=\"72\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"415\" y=\"76\">1b<\/text><\/g><g><path d=\"M130 120 l-14 -10 v20 z M130 120 l14 -10 v20 z\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"130\" x2=\"130\" y1=\"120\" y2=\"102\"><\/line><rect fill=\"#1e2123\" height=\"4\" width=\"16\" x=\"122\" y=\"98\"><\/rect><circle cx=\"130\" cy=\"152\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"130\" y=\"156\">1<\/text><\/g><g><rect fill=\"#fff\" height=\"36\" rx=\"4\" stroke=\"#1e2123\" stroke-width=\"2\" width=\"60\" x=\"195\" y=\"102\"><\/rect><circle cx=\"225\" cy=\"160\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"225\" y=\"164\">2<\/text><\/g><path d=\"M205 112 h40 M205 120 h40 M205 128 h40\" stroke=\"#1e2123\" stroke-width=\"1.5\"><\/path><g><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"300\" x2=\"300\" y1=\"116\" y2=\"90\"><\/line><circle cx=\"300\" cy=\"77\" fill=\"#fff\" r=\"13\" stroke=\"#1e2123\" stroke-width=\"2\"><\/circle><line stroke=\"#e6305d\" stroke-width=\"2\" x1=\"300\" x2=\"307\" y1=\"77\" y2=\"70\"><\/line><circle cx=\"324\" cy=\"64\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"324\" y=\"68\">3<\/text><\/g><g><rect fill=\"#fdecf1\" height=\"68\" rx=\"4\" stroke=\"#e6305d\" stroke-width=\"2\" width=\"110\" x=\"360\" y=\"86\"><\/rect><circle cx=\"415\" cy=\"176\" fill=\"#e6305d\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"415\" y=\"180\">4<\/text><\/g><path d=\"M392 120 h46 l-10 -8 m10 8 -10 8\" fill=\"none\" stroke=\"#e6305d\" stroke-width=\"2.5\"><\/path><g><rect fill=\"#fff\" height=\"34\" rx=\"4\" stroke=\"#1e2123\" stroke-width=\"2\" width=\"26\" x=\"610\" y=\"68\"><\/rect><circle cx=\"623\" cy=\"124\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"623\" y=\"128\">5<\/text><\/g><path d=\"M623 102 V117\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><g><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"690\" x2=\"690\" y1=\"116\" y2=\"90\"><\/line><circle cx=\"690\" cy=\"77\" fill=\"#fff\" r=\"13\" stroke=\"#1e2123\" stroke-width=\"2\"><\/circle><line stroke=\"#e6305d\" stroke-width=\"2\" x1=\"690\" x2=\"697\" y1=\"77\" y2=\"70\"><\/line><circle cx=\"714\" cy=\"64\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"714\" y=\"68\">6<\/text><\/g><g><path d=\"M800 120 l-14 -10 v20 z M800 120 l14 -10 v20 z\" fill=\"#fff\" stroke=\"#1e2123\" stroke-width=\"2\"><\/path><line stroke=\"#1e2123\" stroke-width=\"2\" x1=\"800\" x2=\"800\" y1=\"120\" y2=\"102\"><\/line><rect fill=\"#1e2123\" height=\"4\" width=\"16\" x=\"792\" y=\"98\"><\/rect><circle cx=\"800\" cy=\"152\" fill=\"#1e2123\" r=\"11\"><\/circle><text fill=\"#fff\" font-family=\"Montserrat,Arial\" font-size=\"12\" font-weight=\"700\" text-anchor=\"middle\" x=\"800\" y=\"156\">1a<\/text><\/g><\/svg><\/p><\/div><div class=\"wp-block-group vf-t-figcaption is-layout-flow wp-block-group-is-layout-flow\"><ol class=\"wp-block-list\"><li>Shutoff valves (1, 1a) and bypass valve (1b)<\/li><li>Strainer<\/li><li>Inlet pressure gauge<\/li><li>M2 reducing valve<\/li><li>Safety valve<\/li><li>Outlet pressure gauge<\/li><\/ol><\/div><\/div><h3 class=\"wp-block-heading\">Installation and start-up<\/h3><ol class=\"vf-steps wp-block-list\"><li><b>Clean the pipe<\/b> and install a strainer upstream to protect the seat.<\/li><li><b>Install the valve in a horizontal pipe<\/b>, following the arrow on the body. If condensate is present, give the pipe a slight downward slope.<\/li><li><b>Point the actuator downward<\/b>, the standard position and the one required for steam. Upward only with gases and liquids up to 80 \u00b0C; never horizontal.<\/li><li><b>Support the pipe<\/b> close to the flanges, never the valve or the actuator.<\/li><li><b>With steam, connect the control line<\/b> (10 \u00d7 1 mm tubing) in the reduced-pressure zone, at least 1 m from the outlet, or to the manifold if there is one. If the valve oscillates, add a needle valve.<\/li><li><b>With steam or above 125 \u00b0C, install the water seal pot<\/b> at the highest point, connected from the side and with a slight slope toward the pipe. Fill it with water until it overflows.<\/li><li><b>Connect the bypass<\/b> beyond the pressure sensing point and open the shutoff valves slowly to avoid water hammer.<\/li><li><b>Adjust the pressure on site<\/b>, because the valve does not come with a fixed set point: compressing the spring (turning clockwise) raises the outlet pressure; releasing it lowers it.<\/li><\/ol><p class=\"wp-block-paragraph\">Installation must be carried out by specialized personnel. In ATEX zones, ensure electrical conductivity between the valve and the installation. If the pressure is unstable, review the <a href=\"https:\/\/www.valfonta.com\/en\/blog\/pressure-reducing-valve-problems\/\">most common problems with reducing valves<\/a>.<\/p><\/section><section id=\"documentacion\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">M2 technical documentation<\/h2><div class=\"wp-block-group vf-docs is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-doc vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i>PDF<\/i><\/p><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>M2 datasheet<\/b><span>PDF \u00b7 6 pages \u00b7 features, exploded view, dimensions, and installation<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/M2-18A-ESP.pdf\" aria-label=\"PDF M2 datasheet PDF \u00b7 6 pages \u00b7 features, exploded view, dimensions, and installation\" rel=\"noopener\" target=\"_blank\"><\/a><\/p><\/div><div class=\"wp-block-group vf-doc vf-amb-enllac is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><i>PDF<\/i><\/p><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>Operation and installation manual<\/b><span>PDF \u00b7 16 pages \u00b7 installation, ATEX, troubleshooting, and disassembly<\/span><\/p><\/div><p class=\"vf-enllac wp-block-paragraph\"><a class=\"vf-enllac-estirat\" href=\"\/wp-content\/uploads\/2026\/10\/Manual-M2-18A-ESP.pdf\" aria-label=\"PDF Operation and installation manual PDF \u00b7 16 pages \u00b7 installation, ATEX, troubleshooting, and disassembly\" rel=\"noopener\" target=\"_blank\"><\/a><\/p><\/div><\/div><p class=\"wp-block-paragraph\">Order and ATEX documentation: see our <a href=\"https:\/\/www.valfonta.com\/en\/certificates\/\">quality certificates<\/a>.<\/p><\/section><section id=\"comparar\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">M2 vs. other Valfonta reducing valves<\/h2><p class=\"wp-block-paragraph\">Check whether the M2 is the right model or whether another reducing valve in the range suits you better.<\/p><div class=\"wp-block-group vf-tbl-wrap is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-table vf-tbl vf-tbl--grid\"><table><thead><tr><th scope=\"col\">Model<\/th><th scope=\"col\">DN<\/th><th scope=\"col\">PN<\/th><th scope=\"col\">Max. inlet (barg)<\/th><th scope=\"col\">Outlet (barg)<\/th><th scope=\"col\">Max. T (\u00b0C)<\/th><th scope=\"col\">Steam<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\">PRV30<\/a><\/th><td>15 \u2013 25<\/td><td>25<\/td><td>25<\/td><td>0,5 \u2013 12<\/td><td>80 (125\u2013150)<\/td><td>No<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\">PRV20<\/a><\/th><td>8 \u2013 20<\/td><td>40<\/td><td>40<\/td><td>0,2 \u2013 20<\/td><td>150<\/td><td>No<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\">PRV44<\/a><\/th><td>15 \u2013 25<\/td><td>25<\/td><td>25<\/td><td>0,5 \u2013 12<\/td><td>210<\/td><td>Yes<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\">PRV45<\/a><\/th><td>15 \u2013 25<\/td><td>25<\/td><td>16<\/td><td>0,01 \u2013 8<\/td><td>150<\/td><td>Yes<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\">VD<\/a><\/th><td>15 \u2013 100<\/td><td>40<\/td><td>40<\/td><td>1,5 \u2013 16<\/td><td>200<\/td><td>Yes<\/td><\/tr><tr><th scope=\"row\"><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a><\/th><td>15 \u2013 150<\/td><td>40<\/td><td>40<\/td><td>0,1 \u2013 15<\/td><td>220<\/td><td>Yes<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-class=\"vf-cur\"><\/span>M2<\/th><td>15 \u2013 100<\/td><td>40<\/td><td>40<\/td><td>0,02 \u2013 10<\/td><td>180<\/td><td>Yes<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">Temperature in parentheses: with EPDM or Viton gaskets. Data from the Valfonta general reducing valve catalog (2025).<\/p><\/section><section id=\"preguntas\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Frequently asked questions about the M2<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the minimum outlet pressure of the M2?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">0.02 barg, with the 350 mm actuator on DN15 to DN32. On DN40 to DN65 the minimum is 0.03 barg, and on DN80 and DN100, 0.1 barg.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Does it need an external control line?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Not on water and gases: it is supplied with internal pressure sensing. With steam, or if requested with the order, it has a 10 \u00d7 1 mm control line connected at least 1 m from the outlet.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can it be used with steam?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Yes, up to 180 \u00b0C, with an EPDM+PTFE diaphragm, a control line, a water seal pot filled with water, and the actuator pointing downward. For higher temperatures, see the <a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a>.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Does the M2 replace a safety valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">No. A reducing valve is not a safety valve; if necessary, install overpressure protection at the outlet.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What spare parts does the manufacturer recommend?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The gaskets (5 and 25), the bearing (12), the O-rings (15, 17, and, on DN100, 42), the diaphragm (19), the compensation plunger (26), and the seat (28). Maintenance is carried out with the valve installed, depressurized, and isolated.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can it be installed in an ATEX zone?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Yes. It carries ATEX II 2 GD marking (certificate LOM 14.034 U) for zones 1, 2, 21, and 22, depending on the temperature class of the fluid. More in <a href=\"https:\/\/www.valfonta.com\/en\/blog\/atex-valves\/\">ATEX valves<\/a>.<\/p><\/div><\/details><\/section><section id=\"relacionados\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Other pressure reducing valve models<\/h2><ul class=\"vf-rel wp-block-list\"><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valves-m1\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-m1-perspectiva-400.webp\" alt=\"M1 reducing valve\" class=\"wp-image-201\" width=\"300\" height=\"300\" loading=\"lazy\"><b>M1 reducing valve<\/b><span>Up to DN150 and steam at 220 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/bellow-pressure-reducing-valve\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2F.jpg\" alt=\"M2F bellows reducing valve\" class=\"wp-image-209\" width=\"300\" height=\"300\" loading=\"lazy\"><b>M2F bellows reducing valve<\/b><span>DN15\u201350 and steam up to 200 \u00b0C without a water seal pot.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv45\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV45-55-700x700-1.jpg\" alt=\"PRV45 reducing valve\" class=\"wp-image-191\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV45 reducing valve<\/b><span>Outlet pressures from 0.01 barg; suitable for steam.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv44\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV30-44.jpg\" alt=\"PRV44 reducing valve\" class=\"wp-image-207\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV44 reducing valve<\/b><span>DN15\u201325, steam up to 210 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-vd\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-vd-perspectiva-400.webp\" alt=\"VD reducing valve\" class=\"wp-image-10116\" width=\"300\" height=\"300\" loading=\"lazy\"><b>VD reducing valve<\/b><span>DN15\u2013100, 40 bar, and steam up to 200 \u00b0C.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv30\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-reductora-presion-prv30-frontal-400.webp\" alt=\"PRV30 reducing valve\" class=\"wp-image-199\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV30 reducing valve<\/b><span>316L stainless, DN15\u201325.<\/span><\/a><\/li><li><a href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-prv20\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-PRV20-FOTO.jpg\" alt=\"PRV20 reducing valve\" class=\"wp-image-215\" width=\"300\" height=\"300\" loading=\"lazy\"><b>PRV20 reducing valve<\/b><span>316L stainless, DN8\u201320 and 40 bar.<\/span><\/a><\/li><\/ul><\/section><section id=\"solicitar\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-quote is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Request a quote for the M2<\/h2><p class=\"wp-block-paragraph\">Give us your installation details and we will recommend the size, actuator, and diaphragm, and whether you need external sensing and a water seal pot.<\/p><ul class=\"wp-block-list\"><li>Fluid and operating temperature<\/li><li>Inlet pressure and desired outlet pressure<\/li><li>Maximum and minimum flow rate<\/li><li>Size, connection, and body material<\/li><\/ul><p class=\"vf-pdp-contact wp-block-paragraph\">You can also call <a href=\"tel:+34933720888\">933 720 888<\/a>.<\/p><\/div>\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f566-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"566\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/en\/wp-json\/wp\/v2\/product\/667#wpcf7-f566-o1\" method=\"post\" class=\"wpcf7-form init vf-form wpcf7-acceptance-as-validation\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\" toolname=\"solicitar_oferta\" tooldescription=\"Request a quote from Valfonta for the models on this page (model, size, fluid and pressures); a member of the team will reply.\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"566\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.2.3\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f566-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/><input type=\"hidden\" name=\"_vf_t\" value=\"1792698979.593e8a3e2bef9ed3\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"M2\" type=\"hidden\" name=\"modelo\" \/><label>Name *<span class=\"wpcf7-form-control-wrap\" data-name=\"nombre\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" autocomplete=\"name\" aria-required=\"true\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"nombre\" \/><\/span><\/label><label>Company<span class=\"wpcf7-form-control-wrap\" data-name=\"empresa\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" autocomplete=\"organization\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"empresa\" \/><\/span><\/label><label>Email *<span class=\"wpcf7-form-control-wrap\" data-name=\"email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" autocomplete=\"email\" aria-required=\"true\" aria-invalid=\"false\" value=\"\" type=\"email\" name=\"email\" \/><\/span><\/label><label>Phone<span class=\"wpcf7-form-control-wrap\" data-name=\"telefono\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-tel wpcf7-text wpcf7-validates-as-tel\" autocomplete=\"tel\" aria-invalid=\"false\" value=\"\" type=\"tel\" name=\"telefono\" \/><\/span><\/label><fieldset><legend>Application data (optional)<\/legend><label>Size<span class=\"wpcf7-form-control-wrap\" data-name=\"dn\"><select class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\" name=\"dn\"><option value=\"\">Select<\/option><option value=\"DN15 (\u00bd\u2033)\">DN15 (\u00bd\u2033)<\/option><option value=\"DN20 (\u00be\u2033)\">DN20 (\u00be\u2033)<\/option><option value=\"DN25 (1\u2033)\">DN25 (1\u2033)<\/option><option value=\"DN32\">DN32<\/option><option value=\"DN40\">DN40<\/option><option value=\"DN50\">DN50<\/option><option value=\"DN65\">DN65<\/option><option value=\"DN80\">DN80<\/option><option value=\"DN100\">DN100<\/option><option value=\"I don&#039;t know\">I don&#039;t know<\/option><\/select><\/span><\/label><label>Fluid<span class=\"wpcf7-form-control-wrap\" data-name=\"fluido\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"air, nitrogen, water, steam\u2026\" value=\"\" type=\"text\" name=\"fluido\" \/><\/span><\/label><label>Inlet pressure (barg)<span class=\"wpcf7-form-control-wrap\" data-name=\"p_entrada\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"p_entrada\" \/><\/span><\/label><label>Required outlet pressure (barg)<span class=\"wpcf7-form-control-wrap\" data-name=\"p_salida\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"p_salida\" \/><\/span><\/label><label>Flow rate<span class=\"wpcf7-form-control-wrap\" data-name=\"caudal\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"e.g. 2 m\u00b3\/h\" value=\"\" type=\"text\" name=\"caudal\" \/><\/span><\/label><label>Temperature (\u00b0C)<span class=\"wpcf7-form-control-wrap\" data-name=\"temperatura\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"temperatura\" \/><\/span><\/label><\/fieldset><label class=\"vf-full\">Message<span class=\"wpcf7-form-control-wrap\" data-name=\"mensaje\"><textarea cols=\"40\" rows=\"4\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea\" aria-invalid=\"false\" name=\"mensaje\"><\/textarea><\/span><\/label><label class=\"vf-chk vf-full\"><span class=\"wpcf7-form-control-wrap\" data-name=\"privacidad\"><span class=\"wpcf7-form-control wpcf7-acceptance\"><span class=\"wpcf7-list-item\"><input type=\"checkbox\" name=\"privacidad\" value=\"1\" aria-invalid=\"false\" \/><\/span><\/span><\/span> <span>I have read and accept the <a href=\"\/en\/privacy-policy\/\">privacy policy<\/a> *<\/span><\/label><input class=\"wpcf7-form-control wpcf7-submit has-spinner vf-btn vf-btn--pri\" type=\"submit\" value=\"Send request\" \/><span class=\"vf-hp\" aria-hidden=\"true\"><label>Web <input type=\"text\" name=\"vf_web\" value=\"\" tabindex=\"-1\" autocomplete=\"off\" toolparamdescription=\"Campo de control: d\u00e9jalo vac\u00edo\"><\/label><\/span><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n\n<\/div><\/section><div class=\"wp-block-group vf-pdp-bar is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"tel:+34933720888\">Call<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\">Request a quote<\/a><\/p><\/div><\/article><\/div>","protected":false},"excerpt":{"rendered":"<p>Home\u203aPressure reducing valves\u203aM2 pressure reducing valve Pressure reducing valve \u00b7 Direct-acting diaphragm M2 diaphragm pressure reducing valve From 0.02 barg Direct-acting, single-seat, diaphragm-compensated reducing valve that maintains the outlet pressure even when the inlet pressure fluctuates, with no auxiliary power. It regulates from 0.02 to 10 barg on gases, liquids, and steam, from DN15 to ... <a title=\"M2 diaphragm pressure reducing valve\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\" aria-label=\"Read more about M2 diaphragm pressure reducing valve\">Read more<\/a><\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false,"_generate-full-width-content":"true","_generate-disable-headline":"true","rank_math_title":"M2 diaphragm pressure reducing valve | Valfonta","rank_math_description":"Direct-acting, diaphragm-compensated M2 pressure reducing valve. DN15 to DN100, inlet up to 40 barg, outlet from 0.02 barg, and steam up to 180 \u00b0C.","rank_math_focus_keyword":"","vf_jsonld":"[{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.valfonta.com\/#organization\",\"name\":\"Valfonta\",\"legalName\":\"Val Fonta, S.L.\",\"taxID\":\"B59935718\",\"url\":\"https:\/\/www.valfonta.com\/en\/\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valfonta-logo.webp\"},\"foundingDate\":\"1962\",\"email\":\"valfonta@valfonta.com\",\"telephone\":\"+34 933 720 888\",\"address\":{\"@type\":\"PostalAddress\",\"streetAddress\":\"C\/ Bronze 26, Pol. Ind. Les Guixeres\",\"postalCode\":\"08915\",\"addressLocality\":\"Badalona\",\"addressRegion\":\"Barcelona\",\"addressCountry\":\"ES\"},\"description\":\"Design, manufacture, and sale of pressure reducing valves, pressure relief valves, and control valves.\"},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.valfonta.com\/#website\",\"url\":\"https:\/\/www.valfonta.com\/en\/\",\"name\":\"Valfonta\",\"publisher\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\"},{\"@type\":\"ItemPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\",\"name\":\"M2 diaphragm pressure reducing valve | Valfonta\",\"description\":\"Direct-acting, diaphragm-compensated M2 pressure reducing valve. DN15 to DN100, inlet up to 40 barg, outlet from 0.02 barg, and steam up to 180 \u00b0C.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\",\"datePublished\":\"2020-03-27T10:57:57+02:00\",\"dateModified\":\"2026-03-19T13:50:52+02:00\",\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/#product\"}},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\",\"width\":\"1000\",\"height\":\"1000\",\"caption\":\"Pressure reducing valve\",\"inLanguage\":\"en\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.valfonta.com\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Pressure reducing valves\",\"item\":\"https:\/\/www.valfonta.com\/en\/pressure-reducing-valves\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"M2 pressure reducing valve\",\"item\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\"}]},{\"@type\":\"Product\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/#product\",\"name\":\"M2 diaphragm pressure reducing valve\",\"url\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/\",\"description\":\"Direct-acting, single-seat, diaphragm-compensated reducing valve that maintains the outlet pressure even when the inlet pressure fluctuates, with no auxiliary power. It regulates from 0.02 to 10 barg on gases, liquids, and steam, from DN15 to DN100.\",\"brand\":{\"@type\":\"Brand\",\"name\":\"Valfonta\"},\"manufacturer\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"model\":\"M2\",\"image\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-M2-PROVISIONAL-700x700-1.jpg\",\"material\":\"Carbon steel WCB, stainless steel CF3M, or bronze RG10\",\"additionalProperty\":[{\"@type\":\"PropertyValue\",\"name\":\"Type\",\"value\":\"Direct-acting, single-seat reducing valve, compensated by diaphragm and plunger\"},{\"@type\":\"PropertyValue\",\"name\":\"Sizes\",\"value\":\"DN15 to DN100\"},{\"@type\":\"PropertyValue\",\"name\":\"Connections\",\"value\":\"EN PN16, PN25, or PN40 flanges \u00b7 ANSI 150\/300 flanges \u00b7 BSP or NPT thread up to 2\u2033\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressure rating\",\"value\":\"PN16 to PN40 \u00b7 Class 150 or 300\"},{\"@type\":\"PropertyValue\",\"name\":\"Maximum inlet pressure\",\"value\":\"40 barg (DN15 to DN50) \u00b7 25 barg (DN65 to DN100)\"},{\"@type\":\"PropertyValue\",\"name\":\"Maximum differential pressure\",\"value\":\"25 bar from DN15 to DN50; from DN65 to DN100, on request\"},{\"@type\":\"PropertyValue\",\"name\":\"Outlet pressure\",\"value\":\"0.02 to 10 barg in several ranges, depending on size and actuator\"},{\"@type\":\"PropertyValue\",\"name\":\"Kv coefficient\",\"value\":\"3.5 to 115 m\u00b3\/h depending on DN. Reduced Kv on request\"},{\"@type\":\"PropertyValue\",\"name\":\"Temperature depending on diaphragm and gaskets\",\"value\":\"NBR: \u221220 to 80 \u00b0C \u00b7 EPDM: \u221240 to 125 \u00b0C \u00b7 FKM: up to 150 \u00b0C, on request \u00b7 PTFE: \u221240 to 180 \u00b0C, with condensate pot\"},{\"@type\":\"PropertyValue\",\"name\":\"Fluids\",\"value\":\"Gases (air, nitrogen\u2026), liquids, and steam\"},{\"@type\":\"PropertyValue\",\"name\":\"Materials\",\"value\":\"Body in WCB carbon steel (PN40), CF3M stainless steel (PN40), or RG10 bronze. Internals in AISI 316L stainless steel\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressure sensing point\",\"value\":\"Internal as standard. External with 10 \u00d7 1 mm tubing on request, mandatory with steam\"},{\"@type\":\"PropertyValue\",\"name\":\"Mounting position\",\"value\":\"Horizontal pipe, actuator facing down (facing up only with gases and liquids up to 80 \u00b0C)\"},{\"@type\":\"PropertyValue\",\"name\":\"Pressure Equipment Directive\",\"value\":\"PED 2014\/68\/EU: the nameplate indicates whether CE marking is required\"},{\"@type\":\"PropertyValue\",\"name\":\"ATEX\",\"value\":\"II 2 GD c IIC Tx \/ c IIIC Tx\u00baC \u00b7 certificate LOM 14.034 U\"},{\"@type\":\"PropertyValue\",\"name\":\"On request\",\"value\":\"Stainless steel actuator \u00b7 protective cap for the adjusting stem \u00b7 duplex or super duplex body \u00b7 weld ends\"}],\"category\":\"Pressure reducing valves\",\"subjectOf\":[{\"@type\":\"DigitalDocument\",\"name\":\"M2 datasheet\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/M2-18A-ESP.pdf\",\"encodingFormat\":\"application\/pdf\"},{\"@type\":\"DigitalDocument\",\"name\":\"Operation and installation manual\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/Manual-M2-18A-ESP.pdf\",\"encodingFormat\":\"application\/pdf\"}]},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/product\/pressure-reducing-valve-m2\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the minimum outlet pressure of the M2?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"0.02 barg, with the 350 mm actuator on DN15 to DN32. On DN40 to DN65 the minimum is 0.03 barg, and on DN80 and DN100, 0.1 barg.\"}},{\"@type\":\"Question\",\"name\":\"Does it need an external control line?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Not on water and gases: it is supplied with internal pressure sensing. With steam, or if requested with the order, it has a 10 \u00d7 1 mm control line connected at least 1 m from the outlet.\"}},{\"@type\":\"Question\",\"name\":\"Can it be used with steam?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, up to 180 \u00b0C, with an EPDM+PTFE diaphragm, a control line, a water seal pot filled with water, and the actuator pointing downward. For higher temperatures, see the M1.\"}},{\"@type\":\"Question\",\"name\":\"Does the M2 replace a safety valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. A reducing valve is not a safety valve; if necessary, install overpressure protection at the outlet.\"}},{\"@type\":\"Question\",\"name\":\"What spare parts does the manufacturer recommend?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The gaskets (5 and 25), the bearing (12), the O-rings (15, 17, and, on DN100, 42), the diaphragm (19), the compensation plunger (26), and the seat (28). Maintenance is carried out with the valve installed, depressurized, and isolated.\"}},{\"@type\":\"Question\",\"name\":\"Can it be installed in an ATEX zone?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. It carries ATEX II 2 GD marking (certificate LOM 14.034 U) for zones 1, 2, 21, and 22, depending on the temperature class of the fluid. More in ATEX valves.\"}}]}]}]"},"product_brand":[],"product_cat":[79],"product_tag":[],"class_list":["post-667","product","type-product","status-publish","product_cat-sin-categorizar","first","instock","shipping-taxable","product-type-simple"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product\/667","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=667"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_brand?post=667"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_cat?post=667"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/product_tag?post=667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}