Gate Valve
Gate Valve
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APPLICATIONS
- Oil
- Gas
- Air Slurries
- Heavy liquids
- Steam
- Noncondensing gases
- Corrosive liquids
BEST SUITED FOR
Frequent on-off service Processes where “instantly" large flow is needed
ADVANTAGES
- High Capacity
- Tight Shutoff
- Low Cost
- Little resistance to flow
RECOMMENDED USES
- Fully open/xlosed, non-throttling
- Infrequent operation
- Minimal fluid trapping in line
LIMITATIONS
- Cannot be used for pressure control
- Cavitate at low pressure drops
- Cannot be used for throttling
SALIENT FEATURES
WEDGE
Flexible wedge for improved seating ease of operation, specially in high temprature service, wedges are accurately guided thru the entire stroke
BOBY BONNET CONNECTION
The body&bonnet between cass 150 to 600 bolted bonnet for 900 and above pressure seal design.
GASKET
Stainless steel + flecible graphite spiral wounded gasket is used for 150 to 600 class, ring joint gasket is also optional for class 600 valves, for class 900 and above pressurized seal design is used.
PACKING SEAL
Die moulded pure graphite rings with top and bottom ring of brained graphite with inconel wire reinforcement
STEM NUT
Usaully made of ASTM A439 D2, for large size of valves rolling bearing is fitted at the two sides of the stem nut un order to minimize the open and close torque of valve.
HANDWHEEL
Handwheel or Gear box is usually used for gate valve actuation.
Chain wheel, pneumatic cylinder and electrical actuator can be also used for the valve actuation if being requested by customer.
BACK SEAT
All our gate valve have back seat design, carbon steel valves is fitted with removeable back seat for stainless steel integral machined with bonnet.
SEAT FACES
Seat faces lapped for smooth finish and superior sealing. Optional renewable threaded seat or welded seats are as per customer specification.
STEM
Stems are non-rotating with surface finish to maximize packing seal for low fugitive emissions.
SPECIAL OPTIONS
- Extended Bonnet design for low temperature and cryogenic services.
- Flexible / Solid Wedge / Double Disc Type
- Gland Seal Design (Water Seal) With Lantern Ring
- Bolted Bonnet / Pressure Seal Bonnet
- Gear / Pneumatic Cylinder / Hydraulic Cylinder / Electrical Actuator Operated
- Locking Arrangement
- With NACE MR 0175
- Tailor Made Valve