Pneumatic Butterfly Valve Material of valve: AISI304, AISI304L, AISI316, AISI316LStandard of valve: DIN/SMS/3A/ISO/IDFFlux domination of pipeline: DN25-150&1"-6", applied to the stainless steel pipeline systemWorking principle: Remote-controlled operation by the driving gear or manual operation by the handleThree drive forms: Normally closed, normally opened and opened & closed by two air flues separately.Medium: Beer, Dairy, Beverage, Pharmacy.