Selecting the right gate valve for an application depends on many factors – the process fluid – liquid, gas, corrosive or dirty; the operating temperature; pressure; working environment; duty and shut off performance.
Through conduit slab and expanding gate valves provide superior sealing characteristics to any other type of valve configuration making them the ideal choice for high integrity, zero leakage applications.
Through conduit slab gates depend on the flowline pressure to effect a seal whereas expanding and wedge gate valves are positive shut off valves that force the gate into the seats to effect a seal through increasing the torque and thrust.
The complete range of gate valves is suitable for surface and subsea applications designed to the stringent API standards – 6A, 17D and 6D.
Options are available for the connection type including, flanged, butt weld, socket weld, hub connectors and compact flange.
Pressures are increasing and to meet our customer requirements we offer pressure ratings up to 16,500 psi. Often the high pressure projects are also characterised with higher temperatures HP/HT and so we offer valves which deliver superior performance up to 175 deg C.
All these valves have their sealing surfaces hard faced with Tungsten Carbide and can be configured with rising or non-rising stems on Hydraulic actuators. The full bore range from 1/2 to 42 inch are available in standard and exotic materials.
|Pressure rating||ANSI 150 to 4500, API 2,000 to 20,000 psi|
|Temperatures||-100°C to + 190°C|
|Water depths||To 3000m|
|Bore Sizes||1/2 to 42″|
|Material options||Carbon and low alloy steels, stainless steels, low temperature, carbon steel, duplex, super duplex, Inconel|
|Actuation||Hydraulic, pneumatic (double acting and spring return), Electric, Manual and ROV|
|Standards||API 6A, API 6D, API 17D, API 6AV1, ISO 10423, ISO 13628, ISO 14313, ISO 14723|
- Compact design
- Gas tight, metal to metal sealing
- Corrosion resistant
- High pressure/high temperature
- Deep water
- Bi-directional sealing
- Fast closing
- Fire safe
- Protection against over pressure
- Inherently failsafe
- Robust design
- Manual, ROV, hydraulic spring return or electric actuation
- Full or reduced bore
- Flanged, buttweld, socketweld, hub connectors, compact flange or other proprietary connections
- Material options
- Seat design
- Gas tight, Tungsten Carbide coated, metal to metal sealing
- Shah Deniz
- Elgin Franklin
- West Delta Deep