|
DESIGN & CONSTRUCTION
FULL FLOW BODY TO API 600
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. Magnetic
particle inspection carried out for special
applications. 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
stem and provides back seating when valve is wide open
under pressure.
EFFICIENT DISC GUIDING
Fully guided disc ensures no chatter on seal face during
closure and eliminates undue side thrust on stem.
SEAL SELDED STELLITE FACED LEAK-PROOF SEATS FOR LONG
SERVICE
Hard faced with satellite & for longer seat life
Suitable for steam, oil and gas at higher temperatures.
Seating faces are ground and lapped.
STEM
Heat treated 13% Cr. Stainless Steel, with precision
Acme thread.
Self adjusting radial back seating shoulder engages with
the back seat in the bonnet. Ground mirror-like finish
assures long life of packing which drastically reduces
friction and no leakage.
STRONGER, 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 of the SS spiral metal is
eliminated.
STUFFING BOX
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 graph oil packing is available.
FLANGE FACING
Flanges on Class 150 and 300 Valves have a 1/16” raised
face and ¼” on Class 600 valves. Finish 125-250 AARH on
all valves.
|
