Oliver Valvetek Product Range

Hydraulically Actuated Subsea Gate Valves


Oliver Valvetek Limited manufactures a range of hydraulically actuated subsea gate valves, from 1/2" bore to 1.00" bore. These valves typically have an operating pressure rating up to 15,000psi [1,034bar] and a operating temperature range of -20F [29c] to +300F [+150c]. Water depth rating down to 10,000ft [3,050m]. We engineer and innovative Shallow, Medium and Deep Water Hydraulic Gate Valves for use in the Oil, Gas and Petrochemical sectors.

Hydraulically Actuated Subsea Gate Valves provide the user with a low flow restriction metal to metal seat sealing isolation for applications such as chemical injection lines on Christmas trees and manifold structures.

The Oliver Valvetek hydraulic gate valve range of through conduit slab gate valves are provided with hydraulically actuated (fail close or fail open) operation.

The gate and seat sealing faces used within the valves utilise tried and tested Tungsten Carbide hard facing technology to provide gas tight sealing. The small bore subsea gate valves are qualified at different pressure ratings up to 1,034bar (15,000psi).

Qualification testing is performed to the exacting standards of API 6A and 17D. Compact hydraulic actuators can be supplied for a range of different water depths down to 3,050m (10,000ft).

Hydraulically Actuated Subsea Valve Specifications
PSI RatingUp to 15,000 PSI
Maximum Water DepthUp to 3,050m (10,000 ft)
Temperature Range-20F [29c] to +300F [+150c]
Bore Sizes0.50" [10mm] bore to 1.00" [25mm]

Disc Spring Fail Close Actuator

The fail close (optional fail open) action is by way of a disc spring stack. These have been design and tested for thousands of operating cycles. A 50,000 cycle test was conducted on one set. Actuator spring stack can be provided for water depths down to 10,000ft (3050m).

Override Operator

The actuated gate valves can be supplied with an override operator, which can be used to open the gate valve in the event of a loss of hydraulic pressure. Different adaptors can be provided for connection to extension rods for ROV operation.

Position Indication

Clear position during both hydraulic and override operation.

Hydraulic Actuator Seals

Tee seal hydraulic actuator seals with Peek anti-extrusion rings are used as standard and have been tested to 7,500psi [517 bar].

Override Operating Threads

The multi-turn ACME thread design ensures low override operating torques.

Uninterrupted flow passage through valve

The control on the fully open position provides clear through bore with minimum restriction to flow.