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