The uniqueness of the Series 7700 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. Manufactured without silicone Series 7700 available upon special request.
The stem-to-disc connection provides zero backlash. The high strength, corrosion resistant, stainless steel stems are blow-out proof. Each stem is fitted with a secondary seal that also provides a lifetime lubrication chamber.
The Series 7700 valve is designed with the contractor in mind. The valve body is a rugged one-piece casting with an integral mounting base for gear operator or handle actuation, while providing room for a minimum of 2" of pipe insulation. The valve is designed and manufactured to meet or exceed the requirements of MSS SP-67.

The Fig. 70G Butterfly Valve is designed for use with Anvil Gruvlok couplings for fast and easy installation on grooved pipe. The valve body is fully rubber lined in EPDM or Nitrile material. A 316 Stainless Steel Disc is standard. The valve is supplied with a two position lockable handle.
Grooved ends conform to the requirements of AWWA C606.
Not intended for use in potable water systems.
The valve must not be installed with the disc in the fully open position. The disc must be partially closed so that no part is protruding past the end of the valve body during installation.

The Model B480 Grooved End Stainless Steel Butterfly Valve with Lever Handle is a grooved-end stainless steel butterfly valve designed for 300 psi service, supplied with a 10-position locking lever handle. The end-to-end dimensions conform to MSS SP-67. The body is investment cast in grade CF8M (Type 316) to ASTM A743 with integral neck and ISO mounting top flange. The neck height allows for pipe insulation up to two inches thick. The disc is a dual-seal type, encapsulated either with Grade “EN” EPDM for cold water services or with Grade “T” Nitrile for oil services. The Model B480 Stainless Steel Butterfly Valves with standard disc and Grade “EN” EPDM seat are UL classified to ANSI/NSF 61 and ANSI/NSF 372