Gruvlok® Series 7700 Nylon Coated Ductile Iron Butterfly Valve, Grooved, 300 psi, -40 to 230 deg F

The uniqueness of the series 7721 Gruvlok® butterfly valve begins with the spherical bore of the disc seat area. This facilitates a constant Disc-to-Seat loading that maintains a leak tight stem seal regardless of disc position. The stem sealing force is constant through the full disc cycle and operating torques are kept low which increases valve life. The design provides a bubble tight seal from full vacuum to 300 psi when the valve is closed. The valve is rated for dead end service to a full pressure rating of 300 psi.