Locking apparatus for gate valves
Patent
·
OSTI ID:5437852
A locking apparatus for fluid operated valves having a piston connected to the valve actuator which moves in response to applied pressure within a cylinder housing having a cylinder head, a catch block is secured to the piston, and the cylinder head incorporates a catch pin. Pressure applied to the cylinder to open the valve moves the piston adjacent to the cylinder head where the catch pin automatically engages the catch block preventing further movement of the piston or premature closure of the valve. Application of pressure to the cylinder to close the valve, retracts the catch pin, allowing the valve to close. Included are one or more selector valves, for selecting pressure application to other apparatus depending on the gate valve position, open or closed, protecting such apparatus from damage due to premature closing caused by pressure loss or operational error.
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- EDB-84-030606
- Patent Number(s):
- None
- Application Number:
- ON: DE84005993
- OSTI ID:
- 5437852
- Country of Publication:
- United States
- Language:
- English
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