Hydraulic relief valve RV-10 with hydraulic valve block base pipeline pressure relief valve threaded plug-in direct-acting relief valve

The definition of "valve" is a device used to control the direction, pressure and flow of fluid in a fluid system. Valves are devices that make the medium (liquid, gas, powder) in pipes and equipment flow or stop, and can control its flow. The valve is a control part in the pipeline fluid transportation system, which is used to change the cross section of the passage and the flow direction of the medium, and has the functions of diversion, cut-off, adjustment, throttling, non-return, diversion or overflow pressure relief. Valves used for fluid control range from the simplest cut-off valve to all kinds of valves used in extremely complicated automatic control systems, and their nominal diameters range from tiny instrument valves to industrial pipeline valves with diameters of 10m. Valves can be used to control the flow of various types of fluids, such as water, steam, oil, gas, mud, corrosive media, liquid metal and radioactive fluid. The working pressure of valves can range from 1.3х10MPa to 1000MPa, and the working temperature can range from ultra-low temperature of -269℃ to high temperature of 1430℃. The valve can be controlled by various transmission modes, such as manual, electric, hydraulic, pneumatic, worm gear, electromagnetic, electromagnetic-hydraulic, electric-hydraulic, pneumatic-hydraulic, spur gear and bevel gear drive. Under the action of pressure, temperature or other forms of sensing signals, it can act according to predetermined requirements, or simply open or close without relying on sensing signals. The valve relies on driving or automatic mechanism to make the opening and closing parts move up and down, slide, swing or rotate, thus changing the size of its flow passage area to realize its control function.