Butterfly Valves & Actuation

The Type 567 is a wafer style butterfly valve rated for pressures up to 150 psi and temperatures of up to 140° F for PVC and 176° F for CPVC, also available in polypropylene and PVDF. Better chemical compatibility is achieved because the inner body is the same material as the piping. The Type 567/578 Butterfly valves have a unique eccentric design that means the disc is not in contact with the seal in the open position. The result is less wear and operating torques half that of previous models. Georg Fischer double eccentric butterfly valves require approximately 50% less operating torque than boot-style competitive valves. Lever and gear operators are both available. In the lever version, the opening angle is clearly indicated on the index plate.

Spear’s innovative design departs from traditional liner-seat type valves to eliminate seat creep, reduce operating torque and provide positive seal off. Ideally suited for flow control or throttling, this high performance valve is offered with a full variety of options for greater application versatility. Pressure rated to a maximum internal pressure of 150 psi at 73°F - including dead end service. Heavy blow-out proof 316 stainless steel stem is standard on all valves. PTFE-coated Stainless steel or titanium stems are available on request.

Spear’s innovative design departs from traditional liner-seat type valves to eliminate seat creep, reduce operating torque and provide positive seal off. Ideally suited for flow control or throttling, this high performance valve is offered with a full variety of options for greater application versatility. Pressure rated to a maximum internal pressure of 150 psi at 73°F - including dead end service. Heavy blow-out proof 316 stainless steel stem is standard on all valves. PTFE-coated Stainless steel or titanium stems are available on request.