Characteristics and application of instrument valve

Characteristics and application of instrument valve
Instrument valve is the control device of fluid pipeline, its basic function is to connect or block the flow of pipeline medium, change the flow of medium, change the direction of medium activity, regulate the pressure and flow of medium, and protect the normal operation of pipeline equipment.
Many industrial valves have been used since watt created the steam engine. In the past 20 or 30 years, due to the needs of petroleum, chemical industry, power station, metallurgy, ships, nuclear energy, aerospace and other aspects, higher requirements have been put forward for valves to promote the research and production of high parameter valves. Their working temperature ranges from ultra-low temperature - 269 ℃ to high temperature 1200 ℃ and even as high as 3430 ℃, The working pressure is from 1.33x10-8mpa (1x10-1mmhg) to 1460mpa, the valve diameter is from 1mm to 600mm, even to 9750mm, the valve data is from cast iron, carbon steel to titanium and titanium alloy, high strength corrosion-resistant steel, etc., the valve driving mode is from manual to electric, pneumatic, hydraulic, program-controlled, numerical control, remote control, etc.
With the continuous development of modern industry, the demand for valves is growing. A modern petrochemical plant needs tens of thousands of valves, which are widely used. Frequent opening and closing, but often because of improper production, application, model selection and repair, the appearance of running, emitting, dripping and leaking, resulting in flame, explosion, poisoning and scalding, which may lead to poor product quality, energy consumption improvement, equipment corrosion, material consumption improvement, environmental pollution, and even production stoppage. Therefore, we expect to obtain high-quality valves, In addition to careful design, reasonable selection and correct operation of the valve, it is also necessary to protect and repair the valve in time, so as to reduce the "running, emitting, dripping and leaking" of the valve and all kinds of accidents to a low limit.