Overview
Small-bore Subsea Rotary Valves are used where metal to metal and non-elastomeric sealing is required on applications such as chemical injection lines on Christmas trees and manifold structures. In addition, a quarter-turn operation is required for position indication purposes.
Oliver Valvetek provides a range of small-bore rotary subsea gate valves in bodies with flanged, threaded and welded end connections to suit all applications.
Key Rotary Gate Valve Features:
Position Indication
The Oliver Valvetek manual rotary gate valves are operated through a quarter (90degrees) turn. This provides the end-user with a simple visual indication to the ROV operator of the valve position.
Over-Torque Protection
The quarter-turn operation means that if the valve is over-torqued to a point where the end stops fail, the valve will simply continue to open and close. The valve can then be positioned in the open or closed position and without damage to the valve internals.
Low Operating Torque
Oliver Valvetek has achieved a low operating torque at full differential pressure by utilising fine controls on the spindle to bonnet bearing interface.
Panel Mountable or Block mountable
Oliver Valvetek can provide the end-user and operator with a varied and comprehensive range of operators and receptacles easily configurable to the designer ROV panel.
U-shaped flow passage through the valve.
The unique design of the flow passage through the Oliver Valvetek rotary gate valve minimises the potential flow losses. Flow tested to provide the end-user with accurate flow coefficients and excellent Cv value if there is a concern regarding flow rates.
Proven Destec Metal to Metal Body to Bonnet Sealing Arrangement.
Oliver Valvetek Rotary Gate valves utilise compact gaskets to offer effective and reliable body to bonnet metal sealing. Designed and tested to take total differential pressures from outside to in (10,000 ft hyperbaric conditions) and from inside of up to 18,750psi shell test conditions.
Proven Sealing technology
Oliver Valvetek Rotary Gate Valves uses both static and dynamic sealing technology from other valves in it’s product range, thereby ensuring product reliability is maintained and utilising standardising sealing features across our product portfolio.