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The handwheel or valve knob is a knurled or ridged rubber, plastic or metal fitting attached to the valve spindle, used to rotate the spindle to open and close the valve. Hard rubber or tough plastic are the usual materials on recent models, usually incorporating moulded grips and a metal insert to engage the square or flatted part of the ...
A blowdown valve (BDV) is a type of shutdown valve designed to depressurize a pressure vessel by directing vapour to a flare, vent or blowdown stack in an emergency. BDVs fail-safe to the open position upon failure of the control system. [1] The type of valve, type of actuation and performance measurement are similar to an ESD valve.
The nozzle is opened by external force, independent of the melt-pressure. The shut-off nozzle’s actuation is hydraulically or pneumatically driven. Externally actuated shut-off nozzles can have different ways of closing the melt stream.
Kingston valves of the Argonaute can be seen on her keel. A Kingston valve is a type of valve fitted in the bottom of a ship's plating [1] that connects the sea to the ship's piping and storage tanks. A Kingston valve is a type of seacock. [1] It is arranged so that, under normal operating conditions, sea pressure keeps the valve closed. [2]
To reduce pressure buildup from use, a pressure-relief valve with saliva trap is included. Closed-circuit SCBAs are also noticeably smaller than open-circuit ones. [9] Self-contained self-rescue devices are also closed-circuit SCBAs, working on the same principles, being designed for emergency use in mines, and lasting about one hour. [9]
Subsea valves are used to isolate or control the flow of material through an undersea pipeline (submarine pipeline) or other apparatus.Most commonly used to transport oil and gas, they are designed to function in a sub-marine environment, withstanding the effects of raised external pressure, salt-water corrosion, and bubbles or debris in the material carried.
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A self-sealing fuel tank (SSFT) is a type of fuel tank, typically used in aircraft fuel tanks or fuel bladders, that prevents them from leaking fuel and igniting after being damaged. Typical self-sealing tanks have layers of rubber and reinforcing fabric, one of vulcanized rubber and one of untreated natural rubber, which can absorb fuel when ...