DESIGN TO BS 1873
Cast steel with uniform wall thickness smooth flowing contours and generous fillet radii to prevent stress concentrations. Designed for structural stability, mechanical strength and safe weld ability. Precision machined.
ONE PIECE DESIGN BONNET
Cast steel O S & Y type. The one-piece design aligns stem accurately, eliminating excessive weight and unnecessary working parts. All bonnets are equipped with a stainless steel bushing which serves as a guide for the stem and provides back seating when the valve is wide open under pressure.
EFFICIENT DISC GUIDING
Fully guided disc ensures no chatter on seat face during closure and eliminates undue side thrust on stem.
CA 15/STELLITE FACED LEAK PROOF SEATS FOR LONG SERVICE
Hard faced with CA 15/stellite for longer seat life. Suitable for steam, oil and gas at higher temperatures. Seating faces are ground and lapped.
Heat-treated 13% Cr. stainless steel, with precision square threads. Self-adjusting radial back seating shoulder engages with the back seat in the bonnet. Ground to mirror-like finish assures long life of packing, which drastically reduces friction and ensures no leakage.
STRONG, LEAK PROOF, BODY BONNET JOINT, FULLY ENCASED GASKET
The design of the gasket joint is critical. Its compression is better controlled in a fully enclosed cavity. Also the possibility of unwinding the SS spiral metal is eliminated.
In all valves the stuffing box is deep, has high quality finish and holds high pressure/temperature packing rings ensuring leak tightness and long packing life. Asbestos free graphoil packing is available.
Flanges of class 150 and 300 have a 1/16” raised face.