Richter Chemie-Technik has considerably expanded its product range of shut-off and control butterfly valves. With immediate effect, Richter can supply valves with a PTFE disc/stem unit up to DN 750 or with a metallic disc/stem unit up to DN 1000. The body lining is made of PTFE.
The valves are soft-sealing and gas-tight, both with lined and metallic disc/stem units. Leak-tightness against the atmosphere is in compliance with the German Clean Air Code (TA Luft). They can be used for operating pressures of 0.1 mbar vacuum up to 10 bar and at operating temperatures of -40 to +200 °C.
The wetted materials are FDA-compliant and therefore also suitable for use in food processing, pharmacy and other sectors. Thanks to the version with a metallic disc/stem unit, these valves are also suitable for free-flowing bulk materials.
The double-action stem sealing is maintenance-free and self-adjusting. One special feature of the valves with PFA disc/stem units DN 50 to 400 is the optionally available safety stuffing box. The valves can be operated with a hand lever (lockable), a worm gear with hand wheel or a pneumatic/electric actuator.
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