Multi-Function Valves

The Multi-Function Valve is an accessory to the Walchem metering pumps. It is precisely designed to be mounted and used with the E Series electronic metering pumps. It is easily mounted onto the pump by removing the standard manual air vent valve and replacing it with the MFV. No tools are necessary.

Walchem’s Multi-Function Valves (MFV) provide anti-syphon, back pressure, bleed, drain and pressure relief for your 11, 16 and 21 size E class metering pumps. These valves will prevent syphoning when pumping downhill and will increase accuracy and repeatability in applications with little or no system pressure.

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  • Walchem Multi-Function Valve

    Walchem

    E90364 Walchem VALVE, MULTIFUNCTION, 3/8 PC

    C$3,354.06
    Multi-Function Valves Walchem’s Multi-Function Valves (MFV) provide anti-syphon, back pressure, bleed, drain and pressure relief for your 11, 16 and 21 size E class metering pumps. These valves will prevent syphoning when pumping downhill...
    C$3,354.06

    Add to Cart The item has been added
  • Walchem Multi-Function Valve

    Walchem

    MFV-MTC-7 Walchem MULTI-FUNCTION VALVE, 3/8 PVDF/AFLAS, MP

    C$7,920.44
    Multi-Function Valves Walchem’s Multi-Function Valves (MFV) provide anti-syphon, back pressure, bleed, drain and pressure relief for your 11, 16 and 21 size E class metering pumps. These valves will prevent syphoning when pumping downhill...
    C$7,920.44

    Add to Cart The item has been added
  • Walchem Multi-Function Valve

    Walchem

    MFV-HTC-7 Walchem MULTI-FUNCTION VALVE, 3/8 PVDF/AFLAS, HP

    C$7,920.44
    Multi-Function Valves   Walchem’s Multi-Function Valves (MFV) provide anti-syphon, back pressure, bleed, drain and pressure relief for your 11, 16 and 21 size E class metering pumps. These valves will prevent syphoning when...
    C$7,920.44

    Add to Cart The item has been added
  • Walchem Multi Function Valve

    Walchem

    MFV-MTC-8 Walchem MULTI-FUNCTION VALVE, 1/2 PVDF/AFLAS, MP

    C$7,920.44
    Multi-Function Valves   Walchem’s Multi-Function Valves (MFV) provide anti-syphon, back pressure, bleed, drain and pressure relief for your 11, 16 and 21 size E class metering pumps. These valves will prevent syphoning when...
    C$7,920.44

    Add to Cart The item has been added
  • Walchem Multi-Function Valve

    Walchem

    MFV-LTC-8 Walchem MULTI-FUNCTION VALVE, 1/2 PVDF/AFLAS, LP

    C$7,920.44
    Multi-Function Valves   Walchem’s Multi-Function Valves (MFV) provide anti-syphon, back pressure, bleed, drain and pressure relief for your 11, 16 and 21 size E class metering pumps. These valves will prevent syphoning when...
    C$7,920.44

    Add to Cart The item has been added
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Pressure relief adds over-pressurization protection in the event of a closed or blocked discharge line. With wetted materials made of PVDF, PTFE and AFlas™, one valve will fit most liquid end options.

Maintenance & Inspection of Multi-Function Valve

  • Remove four screws that hold down the top cover of the valve.
  • Completely unscrew (counter-clockwise) and remove the air vent adjustment knob.
  • Clean all of the ports inside of the valve.
  • Clean the diaphragm face. Ensure that there is no debris on the diaphragm or on the air vent adjustment knob o-rings.
  • Re-install the air vent adjustment knob turning it clockwise until it bottoms out.
  • Re-attach the top cover of the valve with the four screws. Be sure to put the top cover into the same position as it was originally. (The top cover and MFV body have paint marks across one corner of the joint to help with positioning.)