。 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. 12, the relief valve outlet should not drag, prevent initiation pressure. 13, the relief valve should be specially test before installation, and seizing the officer tightly closed. 14 and the relief valve should be of use in seizing on a regular basis. 2) , valve installation prior to implementation of seizing appearance, metal brand should accord with the current nation standard GB 12220 of 'general micro valve regulation. 11, the installation of safety valve and protection should be paid attention to the following things of project construction, installation, to bring 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. 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. Q: relief valve selection principle of answer: 1, the steam boiler safety valve, general choose open and all spring safety valve S10 series; 2, liquid medium with safety valve, general choose tiny qi spring safety valve S10 series; 3, air or other gas medium with relief Industrial Valves, general choose closed all rev type spring safety valve; 4, liquefied fuel gas transportation rail tanker tanker or liquefied fuel gas with relief valve, use full and ordinary type built-in relief valve; 5, oil well export with safety valve, general choose pilot operated relief valve; 6 high pressure bypass valve, steam power generation facilities, common choice for security and curb the twofold function of the appliance guiding type Marine valve valve 7, if you want to try regular open, the relief valve should be chosen with improving board. When the medium pressure up to 75 more than one hundred percent, opening pressure can increase the board will be on the disc from the seat slightly, by seizing the flexibility of the relief Industrial Valves opens; 8, if the medium temperature is higher, in order to reduce the temperature of the spring chamber, ordinary when closed safety valve using the temperature over 300 ℃ and open the safety valve using the temperature over 350 ℃, the relief valve should be chosen with cooling device; 9 back pressure is changing, if the valve outlet, and 10 to one hundred percent more than the changes in the open pressure, should choose stripe relief valve; 10, if media have corrosive, should choose stripe tube valve, avoid shut parts due to medium corrosion and lose efficacy. 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. 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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