Yoke sleeve

The upper portion of the Yoke Sleeve is hexagonally tapered to fix the handwheel. The standard material of the Yoke Sleeve is Nodular
Ni-resist D2 with over 1150℃(2100°F) dissolution point in accordance with API Std. Specifications.

Bolting

The body-bonnet blots are manufactured in accordance with API Std. 600specifications.The nuts also strictly conform with ANSI B 1.1.
The stud-blot nuts, hexagonal, rigid and hot-forged, bear material notation as well as do the bolt nuts made according to ANSI B 18.2.2.

Bonnet

The bonnet and valve body have the same wall thickness. The body-bonnet flange drilling is spot-faced to exactly meet stud-bolt nuts. The bonnet back seat bushing guarantees packing replacement even with when the valve is fully opened. The stem packing dimensions of the stuffing box are in accordance with API specifications.

Stem

The machined forged stem comes with a T-shape head, which connects the slot of the wedge. The spherically shaped contacting surface of the head gives greater strength and durability.
The stem dimensions are in accordance with API Std. 600 specifications.The heat treated stem delivers adequate mechanical properties as
Well as excellent hard surface . Furthermore. Opening/shutting friction Is minimized by accurated machining and tapping.

Seat

Bottom seated type sealing rings are welded or screwed into the body.
The sealing surface is finished by lapping. They are forings that have been heat treated delived the best mechanical properties and
required hardness.The differences of hardness between seats and wedge is in accordance with API specifications.

Flexible wedge

The standard disc of our valves is a one-piece fiexible wedge.
Slots are machined on both sides of the wedge which allow it to travel correctly in the integrally cast body guides.
The wedge sealing surfaces have been accurately machined, grind and lapped to a mirror finish to prevent leakage and eliminate galling.

Body

The Cast steel body is designed to insure a wall thickness which is greater at any point than the minimum specified by API Std. 600. Special care has been taken with the design of the Class 150 valve body so that the ellipticaliy shaped center section is free from intensified stresses in the critical area. The body of above Class 300 are made circutar in shape as much as possible to minimize distortion even under extrerne operating conditions. Inlet and outlet port dimensions conform with ANSI B 16.5 Pipe Fitting The welded in type seat ring is standard to insure interchangeability. Except for Class 150 the standard body-bonnet joint is male and female.

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