Elektrogas - VF, VFT VFH Series - Butterfly Valves

VF, VFT and VFH butterfly valves are designed for regulation and control of gas flow and air flow in combustion processes.

Elektrogas - VF, VFT & VFH Series - Butterfly Valves


Features
 

- 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.

Technical Specifications

VF, VFT
 

- Connections: Threaded from Rp3/4 to Rp2 according to ISO7-1
- From DN40 up to DN150 for fitting between two flanges according to EN 1092 PN16
- Rotation angle: 0 / 90° adjustable
- Ambient temperature: -15°C / +60°C
- Media type: Air and non-aggressive gases according EN 437
- Max. media temperature: +60°C, +200°C for use with air only (special version on request)

- Max. Operating pressure: 500 mbar (50 kPa)
- Max. Pressure loss @ Vmax: 150 mbar (15 kPa)

- Materials in contact with fluid:
Aluminium alloy
Copper alloy
Stainless steel
Nitrile rubber (NBR)
Fluoro elastomer (FPM)
Polytetrafluoroethylene (PTFE)

Product DATASHEET - VF, VFT VFH Series - Butterfly Valves

VFH
- Connections: From DN40 up to DN200 for fitting between two flanges according to EN 1092 PN16
- Rotation angle: 0 / 90° adjustable
- Ambient temperature: -15°C / +60°C
- Media type: Heated air and flue gas

- Max. media temperature: +250°C, +450°C with dissipators (optional kit)
- Max. Operating pressure:  150 mbar (15 kPa)
- Max. Pressure loss @ Vmax: 45 mbar (4,5 kPa)   

- Materials in contact with fluid:
Cast iron
Stainless steel
Polytetrafluoroethylene (PTFE)