Hydraulic Gate Valve With Manual Override

A double acting manual override mechanism for the hydraulic actuator of a subsea gate valve and a visual indicator device for indicating the gate position.

Hydraulic gate valve with manual override. Parker valves can be manual motor actuated or solenoid air operated and electrically actuated while mounting configurations can be sub based in line or manifold. Manual override for hydraulic gate valve actuators us4650151a en 1983 01 10. The override includes a drive nut threaded onto the valve stem and a drive sleeve which is telescoped on. Hydraulic gate valves for marine application optional.

Parker offers premium valves for use in hydraulic pneumatic instrumentation refrigeration and aerospace applications available in a variety of types and configurations. The gate is normally held open by hydraulic pressure and is moved by a spring to a fail closed position in the event of a malfunction. The tool uses a high capacity interface to transfer up to 139 metric tonnes 306 000 lbf of force onto the gate valve actuator and have a stroke of 381mm 15. Aolang automatic control valve co ltd professionally provides pneumatic actuators hydraulic actuators electrical actuators.

Applications and compatibility of gate valves and actuators 4 da 1 standard subsea fail safe hydraulic actuator with rotary override for intermediate water depth high performance dhd manual slab gate valve da 3 subsea fail safe hydraulic actuator with linear override da 6 subsea fail safe hydraulic actuator with rotary or linear override for. The gate valve linear override tool gvlot is a linear override tool that has the capability to override large gate valves. The actuator includes a manual override system that functions independently of the actuator s hydraulic piston and return spring an externally accessible valve gate drift adjustment an externally adjustable upstop for the actuator stem a stem thread assembly that can be manufactured from a. Subsea gate valve actuator with external manual override and drift adjustment us4616803a en 1983 08 23.

Aolang automatic control valve co ltd. The thrust generated by the cylinder can be replicated by substituting a multi turn electric actuator with a new acme threaded segment of the gate stem figure 2. Fluid power operated sluice gates usually employ a linear pneumatic or hydraulic cylinder with the piston rod as part of the gate stem to raise and lower the gate. Control valves ball valves butterfly.