| |
- FLEXIBLE GATE
A flexible wedge is a one piece and fully guided cast with a
central hub allowing the seating faces to move reciprocally and
thus compensating for the distortion on body seats due to thermal
expansion or pipe loads. Seat ring and wedge seating face are set
to 9° angle from the vertical to minimize the sliding contacts
between wedge and seat ring while opening or closing them.
Wedging helps lead to a tight seal in a low differential pressure
service. A flexible wedge resists wedge sticking or binding in a
service. The wedge may be closed in a hot condition and opened in
cold. The seating surfaces are stellited to provide high cycle
capability in a very high differential pressure service.
- STANDARD PRESSURE SEAL DESIGN
A segment thrust ring absorbs all the thrusts applied by internal
pressure. A protective ring made by hardened stainless steel
prevents the deformation on the top surface of soft metal gasket.
The gasket can be removed smoothly without any damage on the
sealing surface of body.
- PACKING ADJUSTMENT
All gate and globe valves
have a two-piece packing gland to minimize the scoring on valve
stem which may occur if tightened unevenly. Gland bolts remain
fastened to the bonnet. They swing out of the way to simplify the
packing replacement and are
oriented to adjust the packing from one side of valve.
- DEEP STUFFING BOXES
Deep stuffing boxes are standard type for gate and globe valves.
They allow for extra packing to ensure more reliable stem seal and
sufficient packing depth containing an optional lantern ring in
the middle of box. Where lantern ring is included, a tapped and
plugged hole is made. If specified, a ball grease injector can be
fitted with.
- BEARING INSERT TYPE YOKE SLEEVE
Large and high pressure valve may require a tremendous amount of
torque to open or close the valve. Ball bearing in the yoke sleeve
will reduce the operating torque of valve by up to 50 percent.
[VALVE
DIMENSIONS] |
[STANDARD FEATURES] |
[STANDARD
MATERIALS] |
|
Class |
GATE |
GLOBE |
|
600 |
Size 6" & Larger |
Size 6" &
Larger |
|
900 |
Size 2", 2 1/2"
& 6" Larger |
|
1500 |
Size 2" &
Larger |
|
2500 |
Size 3" & Larger |
|
