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VF, VFT and VFH butterfly valves are designed for regulation and control of gas flow and air
flow in combustion processes.
Valves can be operated manually using a lever (to setup the high-fire rate of the burner) or
automatically using a servomotor (modulating or staged control) or a solenoid actuator (twostage

Solenoid Electrogas Valve

  • Valves are made of aluminum (VF/VFT types) or cast-iron (VFH type), with wide range of
    threaded connections and for installation between EN 1092 flanges.
    Possibility to have one-size or two-size reductions of the nominal diameter for VF/VFT types.
    Suitable for use with air and non-aggressive gases according to EN 437 (VF/VFT types); heated
    air and flue gas (VFH type).
    Low leakage when valve is in closed position (VFH type provided with butterfly disc stop).
    The VFH type is provided with a double-eccentricity disc and a spring to reduce the backlash.
    This results in an high precision adjustment and avoids valve floating.
    Operated by manual lever, servomotor or by solenoid actuator.
    All components are designed to withstand any mechanical, chemical, thermal condition
    occurring during typical service. Effective impregnation and surface treatments have been used
    to improve mechanical sturdiness, sealing and resistance to corrosion of the components.

  • Connections Threaded from Rp3/4 to Rp2
    according to ISO 7-1
    From DN40 up to DN150
    for fitting between two flanges
    according to EN 1092 PN16
    From DN40 up to DN200
    for fitting between two flanges
    according to EN 1092 PN16
    Rotation angle 0 / 90° adjustable 0 / 90° adjustable
    Ambient temperature -15°C / +60°C -15°C / +60°C
    Media type Air and non-aggressive gases
    according EN 437
    Heated air and flue gas
    Max. media temperature +60°C
    +200°C for use with air only
    (special version on request)
    +450°C with dissipators
    (optional kit)
    Max. Operating pressure 500 mbar (50 kPa) 150 mbar (15 kPa)
    Max. Pressure loss
    @ Vmax
    150 mbar (15 kPa) 45 mbar (4,5 kPa)
    Flow rate See tables See tables
    Materials in contact
    with fluid
    Aluminium alloy
    Copper alloy
    Stainless steel
    Nitrile rubber (NBR)
    Fluoro elastomer (FPM)
    Polytetrafluoroethylene (PTFE)
    Cast iron
    Stainless steel
    Polytetrafluoroethylene (PTFE)
    Driving systems and
    - square shaft 8
    - round shaft Ø10
    - manual lever
    - solenoid SR/SL/ST
    - servomotor MZ
    - servomotor MZ with lever
    - manual lever
    - solenoid SR/SL/ST
    - servomotor MZ

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