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You need to phrase your question better.
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Control valves should always be in the "fail-safe" position when not actively controlled or during a system failure. This ensures that, in the event of a power loss or malfunction, the valve will default to a position that maintains safety and prevents damage to the system. The specific fail-safe position—open or closed—depends on the application and the process requirements. Proper configuration and testing are essential to ensure reliable operation.
Valves in general control the flow of something. They serve as regulators.
What does a modulating pressure control do
A flow control valve is used to control and regulate the flow or pressure of fluids. A flow control valve may be used to regulate gas, steam, water and chemicals.
i dont see how you can eliminate the cam shaftalso the valves are already controlled by computer, thru the cam shaft position sensor
No, semilunar valves control the flow of blood out of the heart.
Integral stsrters are embedded with motorised valves. By using integral starter, one can control motorised valves by remotely and locally. Even it can indicate the motorised valves direction of rotation & its final position, Power failure detection , indicate motor winding temperature, auto phase correction and emergency shut down of valve.
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The Valve Shop has a large selection of flow valves. They also have air, ball, control and butterfly valves. The store's website is http://www.thevalveshop.com/
#1 piston should be at TDC and both valves closed (compression stroke)