Sunday, June 8, 2014

How to use wafer butterfly valve?

Wafer butterfly valve is a circular disc with the stem for opening and closing pieces and rotate to open, close and adjust a valve fluid channel. Butterfly valve plate mounted on the pipe diameter direction. Cylindrical channel in the valve body, disc-shaped disc around the axis of rotation, rotation angle between 0°~ 90°, rotation to 90 °, the valve is fully open state licensing.

Construction, installation points
1)The installation location, height, and export orientation must meet the design requirements, should be firmly connected tightly.
2)Mounted on various types of pipe insulation manual valve handle shall downwards.
3)The valve must be visually inspected prior to installation, the valve plate should comply with existing national standard GB 12220 "Universal Valve logo." For working pressure greater than 1.0 MPa and the role played off the main pipe valve, the installation should be the strength and rigorous performance tests, passing behind the prospective use. Strength test, the test pressure is 1.5 times the nominal duration of not less than 5min, the valve housing, packing should be no leakage is qualified. Tightness test, the test pressure of 1.1 times the nominal; test pressure in the test duration should be consistent with GB 50243 standards, with no leakage sealing surface of the valve is qualified.

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