An extension arm connecting an above deck valve handle to a below deck valve. A remote shut off mechanism.

Related Terms

DAVIT

A crane arm for handling lifeboats, stores, etc.

FREEBOARD DECK

Deck to which freeboard is measured

BYPASS VALVE

A valve mechanism that assures system fluid flow when a preselected differential pressure across is exceeded; the valve allows all or part of the flow to bypass the filter element.

TWEEN DECK

The space between any two adjacent decks

SADDLE VALVE

Valve body shaped so it may be silver brazed or clamped onto a refrigerant tubing surface.(TAP-A-LINE)

SERVICE VALVE

Manually operated valve mounted on refrigerating systems used for service operation.

POSITIVE CRANKCASE VENTILATION (PCV)

System for removing blow-by gases from the crankcase and returning them through the intake manifold to the combustion chamber where the recirculated hydrocarbons are burned. A PCV valve controls the flow of gases from the crankcase to reduce hydrocarbon emissions.

SOLENOID VALVE

Electromagnet with a moving core. It serves as a valve or operates a valve.

OBLITERATION

A synergistic phenomenon of both particle silting and polar adhesion. When water and silt particles co-exist in a fluid containing long-chain molecules, the tendency for valves to undergo obliteration increases.

BLEEDER VALVE

A valve designed to slowly relief a liquid or gas form system.

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