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VF VFT VFH

Butterfly valves for air and gas 

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

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 (two-stage control).

The setting can be monitored on a graduated scale, this allows precise regulation ratios.

This type of device is suitable for air and gas adjustment in combustion processes, like industrial kilns, drying stoves, smelting and annealing furnaces.

Operating pressureMaterial/Connections

VF (AlSi) DN40 … DN150
VFT (AlSi) Rp 3/4 … Rp 2
VFH (GGG) DN40 … DN200
VF, VFT 0 … 500 mbar
VFH 0 … 150 mbar
 

Media temperature

VF, VFT 60°C (200°C optional)
VFH 450°C

Approvals

VF, VFT 

EC-type tested and certified according to EN13611

 

Gas Type
VF, VFT air and non-aggressive gases (Family 1-2-3, EN 437)
VFH heated air and flue gas