The strength to try, try to pressure for the nominal pressure of 1. Five times the continuous time not less than 5 min, valve shell, packing should be no leakage to conform to the standard. Was sex to try, try to pressure for the nominal pressure of 1. 1 times; Try to continuous time meets the requirements of GB 50243. 2) , Industrial Valves installation prior to implementation of seizing appearance, metal brand should accord with the current nation standard GB 12220 of 'general micro valve regulation. Check valve belong to a kind of semi-automatic valve, its main effect is to avoid the media counter-current, avoid the pump and drive motor reversal, the discharge of the medium and vessels. 。 Check valve construction, installation and main point: 1) , installation position and height, the import direction must accord with the preset requirements, pay attention to the medium flow direction should be exactly the same, with the valve body are marked arrow direction even who strengthen emergency. Q: rounding check valve installation of main point a: wafer check valve is to rely on the media flow itself, and semi-automatic valve opening and closing, used to avoid the media flow valve, also called a non-return valve, check valve, backflow valve, and the back pressure valve. For office pressure is greater than 1. 0 MPa and play on ZhuGanGuan truncation utility valve, before installation should try of strength and tightness, conform to the standard rear must use. 3) , don't make check valves in pipeline bear weight, large check valve ( aetv一 阀) : should be independent, Marine valve is not affected by initiation of pressure piping. Notes to the order: The national standard) A, A: B: product name, model, nominal size medium and temperature, pressure range C: whether there is attachment, delivery time, and special requirements so that we can correct selection for you. Second, if the valve has been selected by design unit of our company model, please order according to the valves parameters directly with our sales center. Three, it is very important when you use the occasion or the environment is more complex, would you please provide design drawings and detailed parameters, our engineers experts will concentrate on review and analysis for you. We can provide you with professional solutions, including design, customization, complete, operation and service. We've been working on the valve leader in the field of industry, to provide you with the latest knowledge of the valve, the best service, best technical adviser. Thank you for visiting our website, if you have any questions, you can call us, we will be dedicated to provide you with quality services. The factory provides professional ball valve, butterfly valve, gate valve, globe valve, check valve, relief valve, safety valve, Marine valve, oil valve, hydraulic control valve and other kinds of valves.
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