A Specification DN50-DN300 B Brief introduction to the product: BF(D) serial resilient butterfly valve is of short neck structure,and meets the strict requirements of HVAC equipment,water conservancy and irrigation,civil and industrial purposes.It may be applied on the narrow pipeline place.The actuator could be handle,worm gear,electric and pneumatic C Pressure and temperature Working pressure:150 - 200psi Temperature scope:NBR-26 ℃ - 82 ℃                    EPDM-26 ℃ - 135 ℃ 150 - 300psi D Materials    Valve body:Cast iron/ductile iron Valve disc:Ductile iron(nickel coated)/aluminum bronze/316 stainless steel Shaft:416/316 stainless steel Sealing seat:NBR/EPDM