果冻久久尤物

Ventilation butterfly valve-D341W-1

Ventilating butterfly valve is used to control the flow of gas or cut off the pipeline control device in the dusty cold air or hot air gas pipeline of the ventilation and environmental protection engineering in chemical industry, building material, power station, glass and so on. This type of valve in the pipeline should generally be installed horizontally.

1. The use of mid-line plate and short structural steel plate welded structure design and manufacture of new, compact, light weight, easy to install, flow resistance is small, the flow of large, to avoid the impact of high temperature expansion, light operation.

2. No links, bolts, etc., reliable, long service life. Can be multi-station installation, not affected by the flow of media

use

Ventilation butterfly valve is a non-hermetic butterfly valve, widely used in building materials, metallurgy, mining, electricity and other production process medium temperature ≤ 300 ℃ nominal pressure of 0.1Mpa pipe, to connect, open or close or adjust the amount of medium.

1, opening and closing convenient and rapid, effort, fluid resistance is small, can often operate.

2, the structure is simple, small size, light weight.

3, you can transport slurry, the pipeline at least the accumulation of liquid at the mouth.

4, low pressure, you can achieve a good seal.

5, regulating performance.

1. Installation location, height, import and export direction must meet the design requirements, pay attention to the flow direction of the media should be consistent with the direction of the arrow arrow, the connection should be firmly and tightly.

2. Valve must be installed before the appearance of inspection, the valve nameplate should be consistent with the existing national standard "General Valve Mark" GB 12220 requirements. For working pressure greater than 1.0 MPa and cut off in the trunk pipe to play the role of the valve, the installation should be carried out before the strength and rigorous performance testing, qualified after the quasi-use. Strength test, the test pressure is 1.5 times the nominal pressure, duration of not less than 5min, valve shell, packing should be no leakage for the pass. Tightness test, the test pressure of 1.1 times the nominal pressure; test duration consistent with GB 50243 requirements.