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The sort of valve product is various, the view is completely not unified also, some is divided by utility (wait like chemical industry, oil, power station) , some is divided by medium (wait like water vapour, air valve) , some presses material to be divided character (wait like cast-iron a powerful person, cast steel a powerful person, forged steel a powerful person) , some is divided by join form (be like inside whorl. At present great majority is used to our country is to press pressure and structural sort to distinguish. Namely: Press nominal pressure cent: ≤1.6MPa is low-pressure a powerful person, pressure 2.5, 4, 6.4MPa is high-pressured a powerful person for middling pressure a powerful person, ≥10MPa, exceed 100MPa to be extrahigh voltage a powerful person. By structural sort cent basically has:
The medium that — of faucet a powerful person, brake a powerful person, shut-off valve, ball valve is used at open or closes pipeline flows.
Check valve (include bottom a powerful person or family) — is used at preventing the medium inside conduit automatically to flow backwards.
— of butterfly a powerful person is used at open or shut the medium inside conduit. Also can make tone husband.
Relief valve — is used on equipment of boiler, container and conduit, when medium pressure Lie provides numerical value too, can remove superfluous medium pressure automatically, make sure production moves safety.
Pressure-relief valve — is used at reducing pressure of the medium inside conduit and equipment automatically. When the department makes medium passes the space of valve of a powerful person, generation obstruction causes pressure loss, achieve decompression goal.
Scanty water implement — is used on vapour conduit to remove condenser water automatically, prevent vapour loss or leak.
Because the utility of valve is extensive, because this effect that it has also is very big. For example: In power plant valve can control the movement of boiler and turbine; In production of oil, chemical industry, valve also is removing control to produce the normal movement of equipment and technological process entirely likewise. In other branch also be such. Nevertheless, valve often is ignored by people quite with other product. For example: When installing machine equipment, people often puts the emphasis in respect of main machine equipment, be like: Container of compressor, high pressure, boiler; Also some chooses undeserved …… . These course of action can make whole production loss of efficiency or stop production, or cause a variety of other accidents to happen. Accordingly, to valve choose, installation, use the job that waits to must undertake is in charge of seriously. Produce to modern industry especially and build more should such -- news source: Shanghai China connects group rich to silver coin water pump factory
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