How to Operate Valves Subsea?
Several issues need to be considered to design and configure a subsea development controlled and operated over a significant distance. Various industries use subsea valves,…
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Manually Operated Subsea Needle Valves
Manually Operated Subsea Needle Valves
Oliver Valvetek Limited manufactures a range of ‘small bore’ subsea needle valves, from 0.25″ [6mm] bore to 1.00″ [25mm] bore. These needle valves typically have an operating pressure rating up to 15,000psi [1035 bar] and an operating temperature range of -20F[-29C] to +350F[+177C]. The Manually Operated Subsea Needle Valves have a typical water depth rating of 10,000ft [3050m].
Oliver Valvetek manufacture Light Duty, Medium Duty, Heavy Duty and Standard Duty Needle Valves for subsea use. Subsea Needle Valves are commonly used to provide a metal to metal seating isolation solution without resorting to the more complex and expensive gate valves. The valves are typically used on Christmas trees to isolate downhole safety valve lines and gasket test lines.
Oliver Valvetek provides a range of small-bore needle valves in bodies with flanged, threaded and welded end connections to suit all applications.
The designs include ones suitable for diver operation and for low torque and high torque ROV tool operation. The small-bore subsea needle valves are qualified at different pressure ratings up to 1035 bar (15,000psi) and are suitable for 3050m (10,000ft) water depths. Qualification testing is performed to the exacting standards of API 6A and 17D
Product Features
- Operator – The needle valves can be supplied with a number of different operators, including Tee Bars and Cross Bars for diver operation or different shaped adaptors for connection to extension rods for ROV operation.
- Operating Threads – The range of subsea needle valves includes both low torque multi-turn designs and medium torque partial turn designs.
- Anti-Blowout Spindle – Each size of needle valve has a spindle designed for maximum torsional (Torque to Damage) strength and has a backseat to providing an anti-blowout safety feature.
- Environmental Seals – All needle valves have seals to prevent the ingress of seawater. These have been tested to water depths equivalent to 10,000 feet (3050m).
- Gland Seals – The gland seal within each needle valve has been designed with a spring energised, lower seal to prove the dynamic adjustment of the packing gland seal in response to pressure changes. This feature ensures leak-free spindle sealing with no requirement for adjustment.
- Non-Rotating Tip – Each needle valve design has a non-rotating, self-centring, anti-galling spindle tip, which gives a positive bubble-tight shut-off.
- Seal Housing or Bonnet – The range of subsea needle valves contains a seal housing that is either threaded or bolted design. In the case of the threaded seal housing designs, these are provided with locking rings, which eliminate the unauthorised removal of the bonnet assembly.
- Traceability of Materials – All the components within an Oliver subsea needle valve have material traceability. The needle valve body, tip, spindle, seal housing are manufactured as standard to API 6A PSL3. The complete needle valves are individually serialised and are provided with material and pressure test certificates to BS EN 10204 3.1 certifications. Optional EN 10204 with the intent of a 3.2 type certification option is also readily available (EN 10204 3.2 true mill witnessed shall be assessed for availability upon request).
| Manually Operated Subsea Needle Valves Specifications: | |
|---|---|
| Materials | Available in API Material Classes FF and HH to NACE MR-01-75 latest revision. |
| Psi Ratings | Up to 15,000 PSI [1035 bar] |
| Temperature Range | -20F to +350F/ -29C to 177C |
| Water Depth | Tested up to 10,000 ft |
Diver Operated Light Duty Needle Valve Data Sheet Rev 1.2
Heavy Duty Multi Turn Needle Valve Data Sheet Rev 1.2
Heavy Duty Three Quarter Turn Needle Valve Data Sheet Rev 1.2
Medium Duty Multi Turn Needle Valve Data Sheet Rev 1.2
Medium Duty Three Quarter Turn Needle Valve Data Sheet Rev 1.2
Standard Duty Needle Valve Data Sheet Rev 1.2
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