{"id":626,"date":"2026-10-02T13:11:12","date_gmt":"2026-10-02T11:11:12","guid":{"rendered":"https:\/\/www.valfonta.com\/control-valve\/"},"modified":"2026-10-05T15:13:20","modified_gmt":"2026-10-05T13:13:20","slug":"control-valve","status":"publish","type":"page","link":"https:\/\/www.valfonta.com\/en\/control-valve\/","title":{"rendered":"Control valves"},"content":{"rendered":"<div class=\"wp-block-group vf-raiz vf-pl-hub is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-cat-wrap is-layout-flow wp-block-group-is-layout-flow\"><article class=\"wp-block-group vf-pdp vf-cat vf-c2 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 class=\"vf-sep\">\u203a<\/span><span aria-current=\"page\">Control valves<\/span><\/p><\/nav><div class=\"wp-block-group vf-cat-hero vf-c2-hero is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-pdp-eyebrow wp-block-paragraph\">Designed and manufactured in Badalona since 1962<\/p><h1 class=\"wp-block-heading\">Control valves<\/h1><p class=\"vf-lead wp-block-paragraph\">They adjust the fluid flow according to the signal from the process control system. The Valfonta C1 is a globe valve with a pneumatic diaphragm actuator for gases, vapors, and liquids, in modulating or ON\/OFF service.<\/p><ul class=\"vf-pdp-keys wp-block-list\"><li><span>Sizes<\/span><b>DN15 to DN100 <small>DN125 and DN150 on request<\/small><\/b><\/li><li><span>Pressure rating<\/span><b>PN25 bronze \u00b7 PN40 steel<\/b><\/li><li><span>Standard Kv<\/span><b>3.5 to 130 m\u00b3\/h<\/b><\/li><li><span>Temperature<\/span><b>\u22125 to 200 \u00b0C <small>up to 350 \u00b0C with suitable bonnet and packing<\/small><\/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=\"#modelos\">View sizes and Kv<\/a><\/p><\/div><p class=\"vf-pdp-contact wp-block-paragraph\">Questions about the Kv or the actuator? Call <a href=\"tel:+34933720888\">933 720 888<\/a> or email <a href=\"mailto:valfonta@valfonta.com\">valfonta@valfonta.com<\/a>.<\/p><\/div><div class=\"wp-block-group vf-c2-finder vfa-role--group vfa-aria-labelledby--vf-c2-fh is-layout-flow wp-block-group-is-layout-flow\"><p id=\"vf-c2-fh\" class=\"vf-fh wp-block-paragraph\">Find the right size for your C1<\/p><div class=\"wp-block-group vf-grp is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><label class=\"vf-lab\" for=\"vf-num-kv\">Required Kv<\/label><\/p><div class=\"wp-block-group vf-num is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><input id=\"vf-num-kv\" type=\"number\" inputmode=\"decimal\" min=\"0\" step=\"any\" data-vf-num=\"kv\" placeholder=\"e.g., 12\"><span>m\u00b3\/h<\/span><\/p><\/div><\/div><div class=\"wp-block-group vf-grp is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><span class=\"vf-lab\">Pipe size<\/span><\/p><div class=\"wp-block-group vf-chips is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"dn\" data-v=\"15-25\" aria-pressed=\"false\">DN15 to DN25<\/button><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"dn\" data-v=\"32-50\" aria-pressed=\"false\">DN32 to DN50<\/button><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"dn\" data-v=\"65-100\" aria-pressed=\"false\">DN65 to DN100<\/button><button type=\"button\" class=\"vf-chip\" data-vf-filter=\"dn\" data-v=\"125-150\" aria-pressed=\"false\">DN125 and DN150<\/button><\/p><\/div><\/div><div class=\"wp-block-group vf-fbar is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--pri\" href=\"#modelos\"><span>View <b data-vf-count=\"\">11<\/b> <span data-vf-count-txt=\"\" data-one=\"size\" data-many=\"sizes\">sizes<\/span><\/span><\/a><button type=\"button\" class=\"vf-reset\" data-vf-reset=\"\" hidden>Clear filters<\/button><\/p><\/div><p class=\"vf-fnote wp-block-paragraph\">Kv is the flow rate in m\u00b3\/h that passes through the fully open valve with a 1 bar pressure differential. You will see the sizes that reach it with a standard plug or on request; we will confirm the size with your process data.<\/p><\/div><\/div><ul class=\"vf-pdp-trust wp-block-list\"><li>In-house design and manufacturing in Badalona<\/li><li>ISO 9001 certified quality system<\/li><li>Version with ATEX II 2 GD marking<\/li><li>Actuator factory-calibrated to your data<\/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=\"#modelos\">The C1<\/a><\/li><li><a href=\"#opciones\">Options<\/a><\/li><li><a href=\"#como-funciona\">How it works<\/a><\/li><li><a href=\"#diferencias\">Control or reducing<\/a><\/li><li><a href=\"#preguntas\">FAQ<\/a><\/li><li><a href=\"#solicitar\">Request a quote<\/a><\/li><\/ul><\/nav><section id=\"modelos\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">The C1 control valve: sizes and Kv<\/h2><p class=\"vf-c2-intro wp-block-paragraph\">The C1 is the actuated control valve in the range. Filter by Kv or size in the header. Each size has a standard Kv and accepts smaller Kv values on request.<\/p><div class=\"wp-block-group vf-c2-cards vf-c2-feat vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-c2-card vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-img is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><a href=\"\/en\/product\/c1-gas-control-valve\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/ok-C1-PROVISIONAL-700x700-1.jpg\" alt=\"C1 control valve with flanged globe body and pneumatic diaphragm actuator\" class=\"wp-image-183\" width=\"160\" height=\"160\" loading=\"lazy\"><\/a><\/figure><\/div><div class=\"wp-block-group vf-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-tag wp-block-paragraph\">Globe \u00b7 pneumatic actuator<\/p><h3 class=\"wp-block-heading\"><a href=\"\/en\/product\/c1-gas-control-valve\/\">C1<\/a><\/h3><p class=\"vf-sub wp-block-paragraph\">Two-way globe valve with multi-spring pneumatic diaphragm actuator, for gases, vapors, and liquids.<\/p><div class=\"wp-block-group vf-t-dl is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Sizes<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">DN15 to DN100 <small>DN125 and DN150 on request<\/small><\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Standard Kv<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">3.5 to 130 m\u00b3\/h<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Pressure rating<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">PN25 bronze \u00b7 PN40 steel<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Temperature<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">\u22125 to 200 \u00b0C <small>up to 350 \u00b0C depending on bonnet<\/small><\/p><\/div><\/div><p class=\"vf-fit wp-block-paragraph\"><b>Choose it if<\/b> the valve must be driven by an external signal, pneumatic or 4\u201320 mA with a positioner, and needs a defined fail-safe position if the air supply fails.<\/p><div class=\"wp-block-group vf-act is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"\/en\/product\/c1-gas-control-valve\/\">View product<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\" data-vf-model=\"C1 control valve\">Request a quote<\/a><\/p><\/div><\/div><\/div><div class=\"wp-block-group vf-c2-card vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-img is-layout-flow wp-block-group-is-layout-flow\"><figure class=\"wp-block-image vf-img-suelta\"><a href=\"\/en\/control-valve-design\/\"><img decoding=\"async\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/DISEO-BRONCE-RG10-400x266-1.jpg\" alt=\"Custom design\" class=\"wp-image-194\" width=\"160\" height=\"160\" loading=\"lazy\"><\/a><\/figure><\/div><div class=\"wp-block-group vf-body is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-tag wp-block-paragraph\">On request<\/p><h3 class=\"wp-block-heading\"><a href=\"\/en\/control-valve-design\/\">Custom design<\/a><\/h3><p class=\"vf-sub wp-block-paragraph\">If the standard C1 does not fit your process, we study the application and adapt the valve.<\/p><div class=\"wp-block-group vf-t-dl is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Sizes<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">DN125 and DN150<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Kv<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">reduced or special<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Connections<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">threaded, BW, or SW<\/p><\/div><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-t-dt vf-p0 wp-block-paragraph\">Internals<\/p><p class=\"vf-t-dd vf-p0 wp-block-paragraph\">anti-cavitation and low-noise cage<\/p><\/div><\/div><div class=\"wp-block-group vf-act is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><a class=\"vf-btn vf-btn--sec\" href=\"\/en\/control-valve-design\/\">View service<\/a><a class=\"vf-btn vf-btn--pri\" href=\"#solicitar\">Inquire<\/a><\/p><\/div><\/div><\/div><\/div><div class=\"wp-block-group vf-c2-bar is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-count vfa-aria-live--polite wp-block-paragraph\"><b data-vf-count=\"\">11<\/b> <span data-vf-count-txt=\"\" data-one=\"size\" data-many=\"sizes\" data-fit=\"1\">sizes<\/span><\/p><p class=\"vf-envolt wp-block-paragraph\"><button type=\"button\" class=\"vf-reset\" data-vf-reset=\"\" hidden>Clear filters<\/button><\/p><\/div><div class=\"wp-block-group vf-c2-table vf-prim 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\"><button type=\"button\" data-vf-sort=\"0\" data-type=\"n\">DN<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"1\" data-type=\"n\">Standard Kv (m\u00b3\/h)<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"2\" data-type=\"n\">Kv on request (m\u00b3\/h)<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"3\" data-type=\"n\">Cv (gpm)<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"4\" data-type=\"n\">Stroke (mm)<\/button><\/th><th scope=\"col\"><button type=\"button\" data-vf-sort=\"5\" data-type=\"n\">Weight without actuator (kg)<\/button><\/th><\/tr><\/thead><tbody><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"15\" data-dnmax=\"15\" data-kvmin=\"0.1\" data-kvmax=\"3.5\"><\/span><span class=\"vf-dato\" hidden data-s=\"15\"><\/span>DN15<\/th><td><span class=\"vf-dato\" hidden data-s=\"3.5\"><\/span>3,5<\/td><td><span class=\"vf-dato\" hidden data-s=\"0.1\"><\/span>0.1 to 2<\/td><td><span class=\"vf-dato\" hidden data-s=\"4\"><\/span>4<\/td><td><span class=\"vf-dato\" hidden data-s=\"20\"><\/span>20<\/td><td><span class=\"vf-dato\" hidden data-s=\"5\"><\/span>5<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"20\" data-dnmax=\"20\" data-kvmin=\"0.1\" data-kvmax=\"5\"><\/span><span class=\"vf-dato\" hidden data-s=\"20\"><\/span>DN20<\/th><td><span class=\"vf-dato\" hidden data-s=\"5\"><\/span>5<\/td><td><span class=\"vf-dato\" hidden data-s=\"0.1\"><\/span>0.1 to 2 \u00b7 3.5<\/td><td><span class=\"vf-dato\" hidden data-s=\"5.8\"><\/span>5,8<\/td><td><span class=\"vf-dato\" hidden data-s=\"20\"><\/span>20<\/td><td><span class=\"vf-dato\" hidden data-s=\"6\"><\/span>6<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"25\" data-dnmax=\"25\" data-kvmin=\"0.1\" data-kvmax=\"9\"><\/span><span class=\"vf-dato\" hidden data-s=\"25\"><\/span>DN25<\/th><td><span class=\"vf-dato\" hidden data-s=\"9\"><\/span>9<\/td><td><span class=\"vf-dato\" hidden data-s=\"0.1\"><\/span>0.1 to 2 \u00b7 3.5 \u00b7 5<\/td><td><span class=\"vf-dato\" hidden data-s=\"10.4\"><\/span>10,4<\/td><td><span class=\"vf-dato\" hidden data-s=\"20\"><\/span>20<\/td><td><span class=\"vf-dato\" hidden data-s=\"7\"><\/span>7<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"32\" data-dnmax=\"32\" data-kvmin=\"3.5\" data-kvmax=\"15\"><\/span><span class=\"vf-dato\" hidden data-s=\"32\"><\/span>DN32<\/th><td><span class=\"vf-dato\" hidden data-s=\"15\"><\/span>15<\/td><td><span class=\"vf-dato\" hidden data-s=\"3.5\"><\/span>3,5 \u00b7 5 \u00b7 9<\/td><td><span class=\"vf-dato\" hidden data-s=\"17.5\"><\/span>17,5<\/td><td><span class=\"vf-dato\" hidden data-s=\"20\"><\/span>20<\/td><td><span class=\"vf-dato\" hidden data-s=\"8\"><\/span>8<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"40\" data-dnmax=\"40\" data-kvmin=\"3.5\" data-kvmax=\"22\"><\/span><span class=\"vf-dato\" hidden data-s=\"40\"><\/span>DN40<\/th><td><span class=\"vf-dato\" hidden data-s=\"22\"><\/span>22<\/td><td><span class=\"vf-dato\" hidden data-s=\"3.5\"><\/span>3,5 \u00b7 5 \u00b7 9 \u00b7 15<\/td><td><span class=\"vf-dato\" hidden data-s=\"25\"><\/span>25<\/td><td><span class=\"vf-dato\" hidden data-s=\"20\"><\/span>20<\/td><td><span class=\"vf-dato\" hidden data-s=\"12\"><\/span>12<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"50\" data-dnmax=\"50\" data-kvmin=\"9\" data-kvmax=\"35\"><\/span><span class=\"vf-dato\" hidden data-s=\"50\"><\/span>DN50<\/th><td><span class=\"vf-dato\" hidden data-s=\"35\"><\/span>35<\/td><td><span class=\"vf-dato\" hidden data-s=\"9\"><\/span>9 \u00b7 15 \u00b7 22<\/td><td><span class=\"vf-dato\" hidden data-s=\"41\"><\/span>41<\/td><td><span class=\"vf-dato\" hidden data-s=\"20\"><\/span>20<\/td><td><span class=\"vf-dato\" hidden data-s=\"15\"><\/span>15<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"65\" data-dnmax=\"65\" data-kvmin=\"15\" data-kvmax=\"60\"><\/span><span class=\"vf-dato\" hidden data-s=\"65\"><\/span>DN65<\/th><td><span class=\"vf-dato\" hidden data-s=\"60\"><\/span>60<\/td><td><span class=\"vf-dato\" hidden data-s=\"15\"><\/span>15 \u00b7 22 \u00b7 35<\/td><td><span class=\"vf-dato\" hidden data-s=\"70\"><\/span>70<\/td><td><span class=\"vf-dato\" hidden data-s=\"30\"><\/span>30<\/td><td><span class=\"vf-dato\" hidden data-s=\"20\"><\/span>20<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"80\" data-dnmax=\"80\" data-kvmin=\"22\" data-kvmax=\"85\"><\/span><span class=\"vf-dato\" hidden data-s=\"80\"><\/span>DN80<\/th><td><span class=\"vf-dato\" hidden data-s=\"85\"><\/span>85<\/td><td><span class=\"vf-dato\" hidden data-s=\"22\"><\/span>22 \u00b7 35 \u00b7 60<\/td><td><span class=\"vf-dato\" hidden data-s=\"100\"><\/span>100<\/td><td><span class=\"vf-dato\" hidden data-s=\"30\"><\/span>30<\/td><td><span class=\"vf-dato\" hidden data-s=\"25\"><\/span>25<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"100\" data-dnmax=\"100\" data-kvmin=\"35\" data-kvmax=\"130\"><\/span><span class=\"vf-dato\" hidden data-s=\"100\"><\/span>DN100<\/th><td><span class=\"vf-dato\" hidden data-s=\"130\"><\/span>130<\/td><td><span class=\"vf-dato\" hidden data-s=\"35\"><\/span>35 \u00b7 60 \u00b7 85<\/td><td><span class=\"vf-dato\" hidden data-s=\"152\"><\/span>152<\/td><td><span class=\"vf-dato\" hidden data-s=\"30\"><\/span>30<\/td><td><span class=\"vf-dato\" hidden data-s=\"40\"><\/span>40<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"125\" data-dnmax=\"125\" data-kvmin=\"60\" data-kvmax=\"200\"><\/span><span class=\"vf-dato\" hidden data-s=\"125\"><\/span>DN125<\/th><td><span class=\"vf-dato\" hidden data-s=\"\"><\/span>\u2013<\/td><td><span class=\"vf-dato\" hidden data-s=\"60\"><\/span>60 \u00b7 85 \u00b7 130 \u00b7 200<\/td><td><span class=\"vf-dato\" hidden data-s=\"\"><\/span>\u2013<\/td><td><span class=\"vf-dato\" hidden data-s=\"\"><\/span>\u2013<\/td><td><span class=\"vf-dato\" hidden data-s=\"\"><\/span>\u2013<\/td><\/tr><tr><th scope=\"row\"><span class=\"vf-dato vf-dato-fila\" hidden data-vf-item=\"p\" data-dnmin=\"150\" data-dnmax=\"150\" data-kvmin=\"85\" data-kvmax=\"260\"><\/span><span class=\"vf-dato\" hidden data-s=\"150\"><\/span>DN150<\/th><td><span class=\"vf-dato\" hidden data-s=\"\"><\/span>\u2013<\/td><td><span class=\"vf-dato\" hidden data-s=\"85\"><\/span>85 \u00b7 130 \u00b7 200 \u00b7 260<\/td><td><span class=\"vf-dato\" hidden data-s=\"\"><\/span>\u2013<\/td><td><span class=\"vf-dato\" hidden data-s=\"\"><\/span>\u2013<\/td><td><span class=\"vf-dato\" hidden data-s=\"\"><\/span>\u2013<\/td><\/tr><\/tbody><\/table><\/figure><\/div><p class=\"vf-note wp-block-paragraph\">All sizes from DN15 to DN100 are made in RG-10 bronze (PN25), carbon steel, or CF3M stainless steel (PN40). DN125 and DN150 on request only. Data from datasheet C1-19A; dimensions and heights with actuator in the <a href=\"\/en\/product\/c1-gas-control-valve\/\">C1 datasheet<\/a>.<\/p><\/div><div class=\"wp-block-group vf-c2-empty vfa-hidden-- is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\"><b>No C1 size covers that Kv.<\/b> Valfonta adapts models and designs custom valves: tell us about your application in the <a href=\"#solicitar\" data-vf-model=\"I don&#x27;t know \/ I need advice\">form<\/a> or see the <a href=\"\/en\/control-valve-design\/\">custom design service<\/a>.<\/p><\/div><\/section><section id=\"opciones\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">C1 options and configuration<\/h2><p class=\"wp-block-paragraph\">It is a <strong>modular<\/strong> design: the same body accepts different plugs, bonnets, packings, leakage classes, and four actuator sizes. These are the options listed in its datasheet:<\/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\"><table><tbody><tr><th scope=\"row\">Plug characteristic<\/th><td>Equal-percentage or linear for modulating control; ON\/OFF for on-off service. Guided plug<\/td><\/tr><tr><th scope=\"row\">Leakage class<\/th><td>Class IV, metal-to-metal \u00b7 Class VI, PTFE + graphite plug \u00b7 On request: PEEK, NBR, EPDM, or Stellite-faced<\/td><\/tr><tr><th scope=\"row\">Bonnet<\/th><td>Standard, from \u22125 to +200 \u00b0C \u00b7 Finned, for over +200 \u00b0C \u00b7 Extended, for below \u22125 \u00b0C \u00b7 With bellows, on request<\/td><\/tr><tr><th scope=\"row\">Packing<\/th><td>Double PTFE + graphite V-ring, up to +200 \u00b0C (standard) \u00b7 PTFE V-rings, up to +150 \u00b0C \u00b7 Graphite, up to +350 \u00b0C \u00b7 Bellows, on request<\/td><\/tr><tr><th scope=\"row\">Actuator<\/th><td>Multi-spring pneumatic diaphragm actuator in four sizes (HF.205, HF.275, HF.360, and HF.430), reversible in line from direct to reverse action<\/td><\/tr><tr><th scope=\"row\">Fail-safe position<\/th><td>Normally closed (closes on air failure) or normally open (opens on air failure)<\/td><\/tr><tr><th scope=\"row\">Control signal<\/th><td>0.2\u20131 \u00b7 0.4\u20131.2 \u00b7 0.4\u20132 \u00b7 1.5\u20133.2 bar, depending on actuator. Control air up to 4 barg<\/td><\/tr><tr><th scope=\"row\">Positioner and accessories<\/th><td>4\u201320 mA electropneumatic positioner (Ex) or smart positioner, air filter regulator, manual handwheel, alarm contacts. NAMUR mounting (IEC 534-6)<\/td><\/tr><tr><th scope=\"row\">Body and connections<\/th><td>RG-10 bronze (PN25), GP240GH \/ A216 WCB carbon steel, or CF3M stainless (PN40). EN 1092-1 or ANSI 150\/300 flanges; on request, BSP or NPT thread, BW, or SW<\/td><\/tr><tr><th scope=\"row\">Special designs<\/th><td>Reduced port, anti-cavitation and low-noise cage, stainless steel construction<\/td><\/tr><\/tbody><\/table><\/figure><\/div><\/section><section id=\"como-funciona\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">How a control valve works<\/h2><div class=\"wp-block-group vf-c2-how is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-txt is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">A control valve works as a variable-area restriction: it adjusts the pressure drop of the fluid according to the signal from a controller. It regulates the flow and, through it, other process variables such as pressure, temperature, or level.<\/p><p class=\"wp-block-paragraph\">The <a href=\"\/en\/product\/c1-gas-control-valve\/\">C1 control valve<\/a> has a two-way, single-seat globe body with top access to the internals (<em>top entry<\/em>) and a guided plug. It is driven by a <strong>multi-spring pneumatic diaphragm actuator<\/strong>: the control air pushes on the diaphragm and overcomes the spring force, and the actuator stem drives the valve stem to move the plug toward or away from the seat.<\/p><p class=\"wp-block-paragraph\">If the air or the signal fails, the springs move the valve to its <strong>fail-safe position<\/strong>: closed in the normally closed version and open in the normally open version. The actuator can be switched from direct to reverse action in line. See the <a href=\"\/en\/blog\/control-valve-types-and-recommendations\/\">types of control valves<\/a>.<\/p><\/div><figure class=\"wp-block-image size-full vf-diagram vf-c2-fig\"><img decoding=\"async\" width=\"2560\" height=\"1440\" src=\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-de-control-scaled-1.jpg\" alt=\"A351 CF3M stainless steel body of the Valfonta C1 control valve with the pneumatic actuator yoke\" class=\"wp-image-161\" loading=\"lazy\"\/><figcaption class=\"wp-element-caption\">C1 body in CF3M stainless steel, with the actuator yoke.<\/figcaption><\/figure><\/div><\/section><section id=\"diferencias\" class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Control valve or self-operated reducing valve<\/h2><p class=\"wp-block-paragraph\">There are two ways to hold a stable downstream pressure. Valfonta <a href=\"\/en\/pressure-reducing-valves\/\">pressure reducing valves<\/a> are self-operated: a spring and the fluid's own pressure move the plug, with no air or electricity. The C1 needs instrument air and a control signal, but it is driven from the control system. We explain it in <a href=\"\/en\/blog\/self-operated-valve-vs-actuated-valve\/\">self-operated valve vs. actuated valve<\/a>.<\/p><ul class=\"vf-pdp-apps wp-block-list\"><li><b>Setpoint from the process control system<\/b><span>The <a href=\"\/en\/product\/c1-gas-control-valve\/\">C1<\/a>: the pneumatic or 4\u201320 mA signal (with positioner) changes the plug position.<\/span><\/li><li><b>ON\/OFF service<\/b><span>The <a href=\"\/en\/product\/c1-gas-control-valve\/\">C1<\/a> with an ON\/OFF plug opens and closes fully according to the signal.<\/span><\/li><li><b>Defined position on air failure<\/b><span>The <a href=\"\/en\/product\/c1-gas-control-valve\/\">C1<\/a> in its normally closed or normally open version.<\/span><\/li><li><b>No instrument air<\/b><span>A self-operated reducing valve: the <a href=\"\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a> (DN15\u2013150, steam up to 220 \u00b0C) or the <a href=\"\/en\/product\/pressure-reducing-valve-m2\/\">M2<\/a> (DN15\u2013100).<\/span><\/li><li><b>Very low outlet pressure<\/b><span>The <a href=\"\/en\/product\/pressure-reducing-valve-m2\/\">M2<\/a> reducing valve regulates from 0.02 barg without an actuator.<\/span><\/li><li><b>Water, air, and inert gases<\/b><span>The <a href=\"\/en\/product\/pressure-reducing-valve-vd\/\">VD<\/a> piston reducing valve, from DN15 to DN100 and up to 40 barg inlet pressure.<\/span><\/li><\/ul><\/section><section id=\"normativa\" class=\"wp-block-group vf-c2-norm is-layout-flow wp-block-group-is-layout-flow\"><h2 class=\"wp-block-heading\">Standards and certificates<\/h2><div class=\"wp-block-group vf-norm vf-t-ul is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>PED 2014\/68\/EU<\/b><\/p><p class=\"wp-block-paragraph\">The nameplate on each C1 indicates whether it carries CE marking; the declaration of conformity is available on request. Quality system certified to Module D1.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>ATEX II 2 GD<\/b><\/p><p class=\"wp-block-paragraph\">Version for zones 1 and 2 (gases) and 21 and 22 (dust). The valve must be equipotentially bonded to the installation.<\/p><\/div><div class=\"wp-block-group vf-t-li is-layout-flow wp-block-group-is-layout-flow\"><p class=\"vf-envolt wp-block-paragraph\"><b>ISO 9001:2015<\/b><\/p><p class=\"wp-block-paragraph\">Design, manufacture, and sale of globe control valves for process control.<\/p><\/div><\/div><p class=\"wp-block-paragraph\">Download <a href=\"\/en\/certificates\/\">Valfonta\u2019s certificates<\/a>.<\/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 control valves<\/h2><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is a control valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">It is a valve that changes the flow area according to the signal from a controller, to regulate the flow and, with it, the process pressure, temperature, or level. The Valfonta C1 does this with a pneumatic diaphragm actuator.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the difference between a control valve and a self-operated reducing valve?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">A control valve moves the plug with an actuator that responds to an external signal, so it needs control air (up to 4 barg on the C1). A self-operated reducing valve, such as the <a href=\"\/en\/product\/pressure-reducing-valves-m1\/\">M1<\/a>, the <a href=\"\/en\/product\/pressure-reducing-valve-m2\/\">M2<\/a>, or the <a href=\"\/en\/product\/pressure-reducing-valve-vd\/\">VD<\/a>, holds the outlet pressure using the energy of the fluid itself. See <a href=\"\/en\/blog\/self-operated-valve-vs-actuated-valve\/\">self-operated valve vs. actuated valve<\/a>.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What data does Valfonta need to size the C1?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The fluid and its temperature, the inlet and outlet pressures, the maximum and minimum flow rates (or the Kv), the control signal, the fail-safe position (NC or NO), the body material, the connection, and the leakage class.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What happens if the control air fails?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">The actuator springs move the valve to its fail-safe position: the normally closed version closes and the normally open version opens. When the signal returns, the valve goes back to its operating position.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Can it be controlled with a 4\u201320 mA signal?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">Yes, with the 4\u201320 mA electropneumatic positioner (Ex) or a smart positioner, both available as options. More on <a href=\"\/en\/blog\/automatic-control-valves\/\">automatic control valves<\/a>.<\/p><\/div><\/details><details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the maximum operating temperature of the C1?<\/summary><div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><p class=\"wp-block-paragraph\">With standard bonnet and packing, from \u22125 to +200 \u00b0C. With a finned bonnet and graphite packing, up to +350 \u00b0C, and with an extended bonnet, below \u22125 \u00b0C. The allowable pressure of the steel body decreases as the temperature rises.<\/p><\/div><\/details><\/section><section id=\"guias\" class=\"wp-block-group vf-c2-more 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\">Technical guides on control valves<\/h2><ul class=\"vf-arts wp-block-list\"><li><a href=\"\/en\/blog\/control-valve-types-and-recommendations\/\">Control valve: types and solutions<\/a><\/li><li><a href=\"\/en\/blog\/selection-of-control-valves\/\">Control valve selection<\/a><\/li><li><a href=\"\/en\/blog\/automatic-control-valves\/\">Automatic control valves<\/a><\/li><li><a href=\"\/en\/blog\/self-operated-valve-vs-actuated-valve\/\">Self-operated vs. actuated valve<\/a><\/li><li><a href=\"\/en\/blog\/pressure-control-valves-common-mistakes\/\">Pressure control valves: mistakes<\/a><\/li><li><a href=\"\/en\/blog\/atex-valves\/\">ATEX valves: types and regulations<\/a><\/li><\/ul><\/div><p class=\"vf-fams wp-block-paragraph\"><b>Other families:<\/b> <a href=\"\/en\/pressure-reducing-valves\/\">Pressure reducing valves<\/a> \u00b7 <a href=\"\/en\/pressure-relief-valve\/\">Pressure relief valves<\/a> \u00b7 <a href=\"\/en\/control-valve-design\/\">Custom design<\/a> \u00b7 <a href=\"\/en\/safety-valves\/\">Safety valves<\/a><\/p><\/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 a control valve<\/h2><p class=\"wp-block-paragraph\">Give us your process details and we will propose the right size, Kv, plug, and actuator.<\/p><ul class=\"wp-block-list\"><li>Fluid, operating temperature, and operating pressure<\/li><li>Inlet and outlet pressures and maximum and minimum flow rates (or Kv)<\/li><li>Control signal and fail-safe position (NC or NO)<\/li><li>Body material, connection, and leakage class<\/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-f542-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"542\">\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\/pages\/626#wpcf7-f542-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=\"542\" \/><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-f542-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=\"1792698934.b7632b9507022157\" \/>\n<\/fieldset>\n<input class=\"wpcf7-form-control wpcf7-hidden\" value=\"V\u00e1lvulas de control\" type=\"hidden\" name=\"familia\" \/><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><label class=\"vf-full\">Model<span class=\"wpcf7-form-control-wrap\" data-name=\"modelo\"><select class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\" name=\"modelo\"><option value=\"\">Select<\/option><option value=\"C1 control valve\">C1 control valve<\/option><option value=\"Custom design\">Custom design<\/option><option value=\"I don&#039;t know \/ I need advice\">I don&#039;t know \/ I need advice<\/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=\"steam, water, air, gas\u2026\" value=\"\" type=\"text\" name=\"fluido\" \/><\/span><\/label><label>Required Kv (m\u00b3\/h)<span class=\"wpcf7-form-control-wrap\" data-name=\"kv\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" value=\"\" type=\"text\" name=\"kv\" \/><\/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>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. 5 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><label>Control signal<span class=\"wpcf7-form-control-wrap\" data-name=\"senal\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text\" aria-invalid=\"false\" placeholder=\"e.g. 4\u201320 mA or 0.2\u20131 bar\" value=\"\" type=\"text\" name=\"senal\" \/><\/span><\/label><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><\/div>","protected":false},"excerpt":{"rendered":"<p>Home\u203aControl valves Designed and manufactured in Badalona since 1962 Control valves They adjust the fluid flow according to the signal from the process control system. The Valfonta C1 is a globe valve with a pneumatic diaphragm actuator for gases, vapors, and liquids, in modulating or ON\/OFF service. Request a quoteView sizes and Kv Questions about ... <a title=\"Control valves\" class=\"read-more\" href=\"https:\/\/www.valfonta.com\/en\/control-valve\/\" aria-label=\"Read more about Control valves\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_generate-full-width-content":"true","_generate-disable-headline":"true","rank_math_title":"Control valves with pneumatic actuator | Valfonta","rank_math_description":"Valfonta C1 control valve: globe valve with pneumatic actuator, DN15 to DN100, PN40, and Kv up to 130 m\u00b3\/h. Find your size by Kv and request a quote.","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\":\"CollectionPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/control-valve\/#webpage\",\"url\":\"https:\/\/www.valfonta.com\/en\/control-valve\/\",\"name\":\"Control valves with pneumatic actuator | Valfonta\",\"description\":\"Valfonta C1 control valve: globe valve with pneumatic actuator, DN15 to DN100, PN40, and Kv up to 130 m\u00b3\/h. Find your size by Kv and request a quote.\",\"isPartOf\":{\"@id\":\"https:\/\/www.valfonta.com\/#website\"},\"about\":{\"@id\":\"https:\/\/www.valfonta.com\/#organization\"},\"inLanguage\":\"en\",\"datePublished\":\"2020-03-11T10:34:24+02:00\",\"dateModified\":\"2026-01-14T01:27:49+02:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/control-valve\/#breadcrumb\"},\"mainEntity\":{\"@id\":\"https:\/\/www.valfonta.com\/en\/control-valve\/#modelos\"},\"primaryImageOfPage\":{\"@type\":\"ImageObject\",\"url\":\"https:\/\/www.valfonta.com\/wp-content\/uploads\/2026\/10\/valvula-de-control-scaled-1.jpg\"}},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.valfonta.com\/en\/control-valve\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.valfonta.com\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Control valves\",\"item\":\"https:\/\/www.valfonta.com\/en\/control-valve\/\"}]},{\"@type\":\"ItemList\",\"@id\":\"https:\/\/www.valfonta.com\/en\/control-valve\/#modelos\",\"name\":\"Control valves\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"url\":\"https:\/\/www.valfonta.com\/en\/product\/c1-gas-control-valve\/\",\"name\":\"C1 control valve with pneumatic actuator\"}]},{\"@type\":\"FAQPage\",\"@id\":\"https:\/\/www.valfonta.com\/en\/control-valve\/#faq\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is a control valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is a valve that changes the flow area according to the signal from a controller, to regulate the flow and, with it, the process pressure, temperature, or level. The Valfonta C1 does this with a pneumatic diaphragm actuator.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between a control valve and a self-operated reducing valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A control valve moves the plug with an actuator that responds to an external signal, so it needs control air (up to 4 barg on the C1). A self-operated reducing valve, such as the M1, the M2, or the VD, holds the outlet pressure using the energy of the fluid itself. See self-operated valve vs. actuated valve.\"}},{\"@type\":\"Question\",\"name\":\"What data does Valfonta need to size the C1?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The fluid and its temperature, the inlet and outlet pressures, the maximum and minimum flow rates (or the Kv), the control signal, the fail-safe position (NC or NO), the body material, the connection, and the leakage class.\"}},{\"@type\":\"Question\",\"name\":\"What happens if the control air fails?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The actuator springs move the valve to its fail-safe position: the normally closed version closes and the normally open version opens. When the signal returns, the valve goes back to its operating position.\"}},{\"@type\":\"Question\",\"name\":\"Can it be controlled with a 4\u201320 mA signal?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, with the 4\u201320 mA electropneumatic positioner (Ex) or a smart positioner, both available as options. More on automatic control valves.\"}},{\"@type\":\"Question\",\"name\":\"What is the maximum operating temperature of the C1?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"With standard bonnet and packing, from \u22125 to +200 \u00b0C. With a finned bonnet and graphite packing, up to +350 \u00b0C, and with an extended bonnet, below \u22125 \u00b0C. The allowable pressure of the steel body decreases as the temperature rises.\"}}]}]}]","footnotes":"","_vg_translation_of":"44","_vg_lang":"en","_vg_wpml_state":"{\"lang\":\"en\",\"trid\":\"44\",\"src\":\"es\"}"},"class_list":["post-626","page","type-page","status-publish"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/pages\/626","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/comments?post=626"}],"version-history":[{"count":4,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/pages\/626\/revisions"}],"predecessor-version":[{"id":630,"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/pages\/626\/revisions\/630"}],"wp:attachment":[{"href":"https:\/\/www.valfonta.com\/en\/wp-json\/wp\/v2\/media?parent=626"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}