(1) Yoke Sleeve – aluminum-bronze yokesleeve has needle type thrust bearings to minimize operating torque.

(2) Stem – all Pacific wedged gate valves are provided with T-head stems. This design allows the wedge to self-align, eliminating the possibility of a bent stem jamming the wedge.

(3) Pressure Seal – uncomplicated design has segmented retaining ring and mild steel silver plated gasket to aid disassembly and provide maximum bonnet seal.

(4) Seat Ring – hardfaced seat rings are welded to body. Tapered design provides unobstructed flow path.

(5) Body – streamlined flow path minimizes pressure drop. End-to-end dimensions meet ANSI B16.10. Most sizes can be furnished with API 600 wall thickness.

(6) Actuators – valves can be supplied with any type of electric, hydraulic or pneumatic actuator. Standard manual handwheels on valves 12" and smaller with 14"and larger bevel gear operated.

(7) Yoke – fully fabricated yoke is seismically qualified while offering easy maintenance and actuator mounting.

(8) Gland – two piece, self-aligning gland eliminates cocking.

(9) See Detail A

(8) Integral Backseat – hardfaced for maximum life.

(11) Wedge – one-piece, flexible wedge is fully guided, resists sticking or binding due to thermal expansion, has hardfaced seating surfaces for long life. Parallel seat or solid wedge also available.

Flexible wedge

The flex wedge is a one piece, fully guided cast wedge with a central hub to allow the seating faces to move relative to each other thus compensating for distortion of the body seats due to thermal expansion or piping loads. Seat ring and wedge seating surfaces are set on a 5 degree angle from vertical to minimize sliding contact of the wedge and seat ring during opening and closing.Wedging actions help affect a tight seal in low differential pressure services. Flexible wedge construction resists wedge sticking or binding in services where the valve may be closed when hot and opened when cold. Seating surfaces are hardfaced to provide high cycle capability in very high differential pressure services.