St. Tang professional production cover outtake, St. Don the hood type outtake quality suppliers the 13,393,272,821 cover outtake performance can be divided into four points: 1, the emissions of toxic or harmful gases inside the drainage channels to go out to meet the health requirements; 2 outtake supply of fresh air to the reservoirs, water tanks and drain pipes, metal pipe in order to reduce corrosion and prolong life; 3, reservoir, tank vent pipe in order to improve the capacity of the drainage system should be set up more than two ( take a small example, drips bottle down the liquid will flow, must be plugged into a ventilation tube, one end through the atmosphere at one end through the space between the surface and the bottom of the bottle, to prevent the formation of negative pressure in the pipeline, to ensure smooth drainage ) to prevent the formation of stagnant water, odor, reduce pressure fluctuations, protect water seal to prevent water seal destruction. 4, can quickly reservoir and water vapor in the tank and harmful gases discharged built-the gauze gauze effectively prevent prevent vector, insects and dust to enter in order to destroy the water quality. Third, the hood-type outtake Specification Model: Z-200, Z-300, Z-400, Z-600 Height: H3 = 0, H3 = 500 H3 = 1000 Z-200, the height H3 = 0 890, H3 = 500 height 1380 H3 = 1000 height 1890 Z-300 H3 = 0 height 1000, H3 = 500 height 1500, H3 = 1000 height 2000 Z-400 H3 = 0 height 1120, H3 = 500 height 1620, H3 = 1000 height 2120 Z-600, H3 = 0 height 1450, a height of H3 = 500 1950, H3 = 1000 Height 2450 four cover type outtake Description 1, the design of the ventilation tube gas velocity of 5 m / s, filtration (fabric) layer of the network, the average gas flow rate of 0.75m / s, filter cloth should be installed using the same material to be stitched, the inner cover can be used a non-toxic non-metallic material; outtake by overburden thickness (H3) 0.0m, 0.5m, 1.0m three kinds design, 0.0m applies to the southern region, 0.5m applies to the central region, and 1.0 apply to cold regions. 3 after welding rust, anti-corrosion requirements based on customer design requirements. Conditionally regional ventilation cap FRP or stainless steel material produced according to the design requirements, in order to achieve a better anti-corrosion and extend the service life.