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Pilot valve: regulates flow or pressure to other valves; Petcock, a small shut-off valve; Pinch valve, "beach ball valve": simple, single-part two-port check valve made from soft plastic and molded onto inflatable units such as beach balls, air mattresses, water wings; can be inflated by pump or by mouth
The maximum working pressure of high-pressure ball valves can be up to 15,000 psi (1,000 bar). High-pressure ball valves are often used in hydraulic systems, so they are also known as hydraulic ball valves. Ball valves in sizes up to 2 inches (51 mm) generally come in a single piece, two or three-piece designs.
A Block and bleed manifold is a hydraulic manifold that combines one or more block/isolate valves, usually ball valves, and one or more bleed/vent valves, usually ball or needle valves, into one component for interface with other components (pressure measurement transmitters, gauges, switches, etc.) of a hydraulic system. The purpose of the ...
An automatic control valve consists of three main parts in which each part exist in several types and designs: Valve actuator – which moves the valve's modulating element, such as ball or butterfly. Valve positioner – which ensures the valve has reached the desired degree of opening. This overcomes the problems of friction and wear.
A sectional illustration of Watt's beam engine of 1774 using the device is found in Thurston 1878:98, [13] and Lardner (1840) provides an illustrated description of Watt's use of the poppet valve. [14] When used in high-pressure applications, for example, as admission valves on steam engines, the same pressure that helps seal poppet valves also ...
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