Nil-Cor - Model 700 Series - Elastomer-Lined Butterfly Valve - Brochure

Nil-Cor butterfly valves feature a double-offset disc design normally found only on expensive high performance types. This design allows the disc to move off the seat with a "camming" action, reducing break-away torque and seat wear. The 360° uninterrupted disc seal eliminates the leak path at the shaft hubs found on PTFE and rubber-lined competitors valves. A super-strong 17-4 ph shaft encapsulated with graphite reinforced vinyl ester resin eliminates corrosion and assures long trouble-free operation.