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FULL FLOW BODY TO API 600
Cast steel with uniform metal sections, smooth flowing contours and
generous radius fillets to prevent
stress concentrations. Designed for structural stability, mechanical
strength and safe weld ability.
Magnetic particle inspected 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 anf provides back seating when
valve is wide open under pressure. Magnetic particle inspected for special
application. Precision Machined.
FLEXIBLE SOLID WEDGE
The low centre stem-wedge contact reduces considerably
the torque. Operation is easy and the wedge does not
stick when valve
is closed hot and allowed to cool. The flexible wedge
design compensates for minor misalignments of seals due
to pipe stresses
and makes the valve tight on both seating faces over a
wide range of pressures. Established long Cycle Life.
EFFICIENT WEDGE GUIDING
Long, smooth ribs are lined up with seal rings and wedge.
Seating faces do not contact each other until the valve
is virtually closed.
Tee-head wedge-stem connection with an unusual low point of
contact reduces torque and prevents lateral stresses on
the stem.
STELLITE FACED LEAKPROOF SEATS FOR LONG SERVICE
ARE WELDED IN
Hard faced with satellite-6 to
min 300 BHN ensures long seat life. Hard seat concept is
advantageous since seat faces are
exposed to live fluid in open condition. This results in
on-line impingement on seat faces. Stellite facing
reduces on-line seat wear.
STEM
Heat treated 13% Cr. Stainless Steel, with precision Acme
threaded. A heavy, Tee-head holds wedge at full contact
for uniform pull
of the wedge in operation. 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.
PULL TEST
Stem Wedge connection meets API pull test.
STRONGER, LEAKPROOF, BODY-BONNET JOINT, FULLY ENCASED GASKET
The design of the gasketed 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 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
class 150,
300 and 600 class valves.
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