Description

The body and bonnet of the gate valve are constructed from high-strength gray cast iron per ASTM A126 Class B. This
provides excellent durability and pressure containment. The interior fluid flow way is full-ported for non-clogging operation.
The wedge disc is also cast iron, with a resilient rubber coating vulcanized onto the seating surface. This rubber coating seals
against the replaceable rubber seat in the body for drip-tight shutoff when closed. The disc is guided vertically into the seat to
create a compression seal without leakage.
The valve stem is non-rising to prevent vertical motion during opening/closing. It is blowout-proof and features multiple O-ring
stem seals to prevent pressure leaks. The stem is coupled to an outside screw and yoke mechanism for easy actuation.
A handwheel is provided for convenient manual operation. The handwheel is connected to a gearbox on larger valves for
mechanical advantage. The gearbox is grease-packed and has a worm gear mechanism to prevent opening/closing from line