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Article Needle Valves (104db90)
The whole system usually consists of a PRV (either a plunger or diaphragm valve), a flow meter, pressure sensors, two isolating valves, a dismantling piece and a control cabinet. Butterfly valves control the flow of steam with a disk which turns on a diametrical axis inside a pipe, or by two semicircular plates hinged on a common spindle, permitting flow in only one direction.The exhausting compressed air tries to flow to the patch of least resistance, tries to bypass the throttle in the flow contro, cannot as the ball is seated on the check by that moving air,
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