Pressure Reducing Valve M2

Sizes:

Sizes: DN15 to DN100 (others on request)

Connection:

DIN and ANSI flanges, BSP - NPT thread

Fluids:

Liquids, neutral gases and steam

Body material:

RG10 / WCB / CF3M

Nominal pressure:

Up to PN40 / CL300

Max. inlet pressure:

40 barg

Kvs value:

up to 115 m3/h

CATALOG

MANUAL

Description

The Valfonta M2 pressure reducing valve is a direct-acting, single-seat device, designed to reduce and stabilize the outlet pressure in fluid distribution lines without the need for auxiliary power (pneumatic or electric). Its advanced design incorporates a balance system using a piston and a fabric-reinforced membrane, allowing extremely precise and stable regulation. This compensation mechanism ensures that the downstream pressure remains constant at the setpoint value, absorbing any pressure fluctuations that may occur at the inlet. It is a robust and versatile solution, ideal for medium and low-pressure installations, suitable for use with steam, gases (air, nitrogen) and liquids. Unlike other systems, the M2 is designed to automatically close when the outlet pressure increases, acting as an effective and safe regulator. Additionally, for high temperature or steam applications, it allows the installation of a condensation tank to protect elastic components.

Size Range: Available in sizes from DN15 up to DN100
Maximum Inlet Pressure: Supports up to 40 barg in small sizes (DN15-DN50) and up to 25 barg in larger sizes (DN65-DN100).
Regulation Range: Can adjust pressures from 0.02 barg up to 10 barg by exchanging different actuators and springs.
Body Materials: Construction available in three standard materials depending on pressure and fluid:
- Ductile Iron (GGG40.3) for PN25.
- Carbon Steel (WCB) for PN40.
- Stainless Steel (CF3M) for PN40, ideal for corrosive environments or sanitary applications.
Internals: The seat, plug, and internal parts are made of Stainless Steel AISI 316L.
Connections: EN1092 flanges (PN16-PN40), ANSI (150/300 lbs) and threaded ends BSP or NPT (up to 2").
Temperature Limits:
- NBR: -20°C to 80°C.
- EPDM: -40°C to 125°C.
- PTFE + GR: -40°C to 180°C (condensation tank required).

Features

The operation of the M2 valve is based on the direct-acting force balance principle. At rest, the valve remains open due to the force of the spring.

Automatic closing: When fluid enters, the upstream pressure pushes the internal assembly (shaft-piston-plunger), exerting a force that tends to close the valve.
Regulation: By compressing the upper spring with the adjustment screw, the membrane and plug are pushed, opening the fluid passage.
Modulation: The valve continuously seeks the balance between the spring force (opening) and the outlet pressure on the membrane (closing), keeping the set value stable.

Operation

To ensure performance and warranty, follow these guidelines:

Installation Position: Must be installed exclusively in horizontal piping, respecting the flow direction indicated by the arrow.
Actuator Orientation:
- Vertically Upwards (Standard): Mandatory for any fluid at T > 80°C.
- Downwards: Allowed only for gases and liquids at T < 80°C.
Filtration: It is almost essential to install a strainer filter upstream to protect the seat from impurities.
Control Piping:
- Standard: Supplied with internal pressure tap, no need for external pipes.
- For Steam: Connect a 10x1 mm tube externally to the outlet piping, at a minimum distance of 1 meter.
Condensation Tank (Barrel):
- Mandatory for steam or liquids at T > 125°C.
- Must be installed at the highest point and filled with water to overflow before start-up to protect the membrane.
Adjustment: Turn the screw clockwise to increase the pressure (+) and counterclockwise to decrease it (-).