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A blast valve is used to protect a shelter, such as a fallout shelter or bunker, from the effects of sudden outside air pressure changes. A nuclear weapon creates a shock wave, which may produce sudden pressure changes of more than an atmosphere (about 1 bar) even several kilometres from the detonation point.
Blast valve: prevents rapid overpressuring in a fallout shelter or a bunker; Boston valve: three-part two-port check valve used on inflatable boats, air mattresses, airbeds etc.; available in two sizes, normal and small; Ceramic valve, used mainly in high duty cycle applications or on abrasive fluids. Ceramic disc can also provide Class IV seat ...
Valve guides are cylindrical metal bushes, pressed or integrally cast into the cylinder head of most types of reciprocating engines, to support the inlet valve and exhaust valve stems. [1] So that they may make proper contact with its valve seat. Along with a corresponding valve spring, they are one component of an engine’s valve train.
An Allis-Chalmers tractor. This is a list of farm and industrial tractors produced by Allis-Chalmers Corporation, as well as tractors that were produced by other manufacturers and then sold under the Allis-Chalmers brand name. For clarity, tractors are listed by series and separated by major models as needed.
Blast dampers usually employ some type of blade held open with tension from a spring. The damper blades close automatically when pressure overcomes the resistance offered by the spring. Various models differ in the amount of blast protection (e.g. 1 bar/14.5 psi or lower amounts of protection) and whether they stay closed after the blast or ...
A separate actuator on the piping releases pressure in the line if it crosses a threshold. This releases the pressure on the back of the seal, causing the valve to open. The essential parts of a PORV are a pilot valve (or control pilot), a main valve, a pilot tube, the dome, a disc or piston, and a seat. The volume above the piston is called ...
A power shuttle is an additional unit used in transmissions and is generally used in agricultural tractors. While the vehicle is moving forwards, the driver can pull a lever that makes it stop and go backwards at the same speed. Power Shuttles are also known under various trade names including Power Reverser
The R also incorporated live hydraulics. PowrTrol, as it was known, provided the operator the ability to lift equipment by the pull of a lever. A pump powered by the PTO clutch provided 1,800 psi (12 MPa) of hydraulic pressure to a lever controlled valve. At 45 hp (34 kW) at the drawbar and 50 hp (37 kW) at the belt, it was the most fuel ...