The Three Lever Valve is a pure shut-off valve for gaseous media, especially
when used with high operating frequency. The main fields of application are where
gaseous media have to be isolated and the valve is operated under quite low differential
pressures (up to approximately 200 mbar)whereas the static pressure can be higher in the
opened or closed position. It is used in the iron and steel industry, air separation units, gas-
fired power plants, the chemical industry and other plants with similar shut-off requirements
for gaseous media.
– Internal shaft option (Type 440). The valve shaft is located inside the cross-section
ofthe pipe. This effects a higher pressure drop, but due to the short length of
thelevers a relative low torque at the shaft is required. Due to the small free
crosssection of the small nominal diameters not recommended below DN 600 (24“).
– External shaft option (Type 450). The valveshaft is located outside the crosssection
of the pipe. Due to the long levers, the required torques increase significantly,
whereas the pressure drop decreases slightly. Nominal diametersfrom DN 200 (8”).
– Actuation option 1 – Worm gear box with hand / chain wheel or electric actuator.
Actuation option 3 – Electro-hydraulic actuator. Independent actuation system,
including safetyfunction by hydraulic accumulator if requested.