How To Select A Valve
Valve is the control of fluid delivery system components, diversion, closure, regulating, throttling and prevent backflow, bypass or overflow the pressure relief function. Valve pipes, as an important control element. Pipeline system to select the most suitable valve is important, related to pipeline safety, loss of traffic, costs, must be familiar with the characteristics of the valve and valve step and basis for selection.
Currently, China valve industry has can production type complete of gate, and as valve, and check back valve, and ball valve, and butterfly valve, and throttle valve, and spin plug valve, and diaphragm valve, and safety valve, and Regulation valve, and sparse valve and special valve, 12 big class; highest work pressure for 600MPa, maximum nominal pass diameter up 5350mm, highest work temperature for 1200 ℃, minimum work temperature for-196 ℃, applies media for water, and steam, and oil, and gas, and strong corrosion sex media (as thick nitric acid, and in the concentration sulfuric acid,), and Flammable media (such as vinyl and stupid), toxic mediums (such as hydrogen sulphide), radioactive and explosive media mediums (metal, such as sodium, water-loop). Valve pressure material bronze, cast iron, nodular cast iron, high-silicon cast iron, cast steel, forged steel, with high and low alloy steel, stainless and acid-resistant steels, Hastelloy, nickel, monel, duplex stainless steel, titanium, etc. And supporting the production of electric, pneumatic and hydraulic valve actuators. With so much variety and complexity of the various conditions of the valve, to choose the most suitable for installation of the pipe system valve products, I thought, we should first understand the characteristics of the valve then should grasp the valve step and basis for selection in addition should follow the principle of choosing the valve.