Forged steel gate valve characteristics and principles

Forged steel gate valve used to cut off or connect the media in the pipeline, use different materials, can be applied to water, steam, oil, nitric acid, acetic acid, oxidizing media, urea and other media. It has three kinds of body cover connection design form, the following first: Body cover welding connection forged steel gate valve, according to the design of this connection form of the valve, the valve body and valve cover all welded seal, the advantage of no external leakage The second: Body cap bolts connected forged steel gate valve, designed according to the form of this connection valve, the valve body and the valve cover bolted, wound gasket seal, the advantage of easy maintenance. The third: self-tight pressure valve forged steel valve, according to the form of connection design of the valve, the valve body and the valve cover with mosquito connection, the pressure from the sealing ring seal, the advantage of the greater the internal pressure, the seal The better the performance Forged steel gate valve installation instructions: 1, installed in the insulation pipe on all types of manual valves, handles are not down 2, the installation position, height, direction of import and export must meet the design requirements, the connection should be firmly 3, forged steel gate valve installation Before the appearance must be checked, the valve nameplate should be consistent with the current national standard "General Valve Flags" GB 12220 requirements. For the working pressure is greater than 1.0 MPa and the main pipe to play the role of cut-off valve, the installation should be carried out before the intensity and tightness test, qualified after the standard use. Strength test, the test pressure of 1.5 times the nominal pressure, the duration of not less than 5min, valve housing, packing should be no leakage as qualified. Tightness test, the test pressure is 1.1 times the nominal pressure; test pressure in the test duration should be consistent with GB 50243 standard requirements, no leakage valve plate sealing as qualified. This article Keywords: gate valve

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