| 11. | The Christmas tree is not only lovely, but may be an anxiety-relief valve.
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| 12. | Investigation showed that the relief valve actuated and vented gas for several hours.
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| 13. | Examples of normally-open valves are purge-gas supply valves or emergency-relief valves.
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| 14. | For these systems often so called " differential " relief valves are used.
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| 15. | Pilot-operated relief valves are a specialized type of pressure safety valve.
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| 16. | "He'll have a relief valve like a tight end or a running back.
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| 17. | A spring-loaded safety relief valve is usually installed on all oil and gas separators.
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| 18. | Hence the use of pressure relief valves and vent valves.
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| 19. | Gas-loaded relief valves are controlled by the nitrogen pressure loaded into the relief valve.
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| 20. | An over-pressure relief valve on the first stage is necessary to protect the hose.
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