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Key points for installing the discharge valve
abstract：1. The installation position, height, and inlet/outlet direction must meet the design requirements, and the connection should be firm and tight.
2. All types of manual valves installed on insulated pipelines
1. The installation position, height, and inlet/outlet direction must meet the design requirements, and the connection should be firm and tight.
2. All types of manual valves installed on insulated pipelines must not have their handles facing downwards.
3. Before installing the valve, a visual inspection must be carried out, and the nameplate of the valve should comply with the current national standard GB 12220 General Valve Markings. For valves with a working pressure greater than 1.0 MPa and serving as a cut-off on the main pipeline, strength and tightness tests should be conducted before installation. Only after passing the tests can they be used. During the strength test, the test pressure should be 1.5 times the nominal pressure, and the duration should not be less than 5 minutes. The valve casing and packing should have no leakage, which is considered qualified. During the tightness test, the test pressure is 1.1 times the nominal pressure; The test pressure should meet the requirements of GB 50243 standard during the duration of the test, and it is qualified if there is no leakage on the sealing surface of the valve disc.
This valve is easy to operate, with free opening and flexible and reliable movement; The valve disc assembly and maintenance are simple, the sealing structure is reasonable, and the replacement of the sealing ring is convenient and practical
2. All types of manual valves installed on insulated pipelines must not have their handles facing downwards.
3. Before installing the valve, a visual inspection must be carried out, and the nameplate of the valve should comply with the current national standard GB 12220 General Valve Markings. For valves with a working pressure greater than 1.0 MPa and serving as a cut-off on the main pipeline, strength and tightness tests should be conducted before installation. Only after passing the tests can they be used. During the strength test, the test pressure should be 1.5 times the nominal pressure, and the duration should not be less than 5 minutes. The valve casing and packing should have no leakage, which is considered qualified. During the tightness test, the test pressure is 1.1 times the nominal pressure; The test pressure should meet the requirements of GB 50243 standard during the duration of the test, and it is qualified if there is no leakage on the sealing surface of the valve disc.
This valve is easy to operate, with free opening and flexible and reliable movement; The valve disc assembly and maintenance are simple, the sealing structure is reasonable, and the replacement of the sealing ring is convenient and practical