4, because when the temperature rise, such as comprised, valve body cavity pressure exceeds the pressure of the pipeline of Marine valve, inlet side floating floating effects of seat, make the body cavity pressure relief in the pipeline. Three, think appropriate and use the standard preset and production: APL6D JB/T5298 structure length: ASME B / 16. 10 JB/T5298 BG/T12221 petition flange: ASME/ANSI/B16. 5 GB/T9113 JB79 check valve experience and try: API598 GI/T13927 - 92. Q: flat gate valve used to explain understand answer: a, product introduction this series product is pipeline valve proprietary technology, introduced the United States by DE, draw lessons from, improvement, according to the demand of urban gas pipeline and the preset special natural gas, coal gas, liquefied gas, pipeline valves, products in the domestic leading water. 3, because the effectiveness of the medium pressure pipelines, floating seat piston effect makes the inlet side seat close to the gate, to import tightly closed. 3, the valve disc in the beginning and end of the paper or the location of the fitted with seat tightly closed surface, guarantee tightly closed surface without being directly eroded by the medium, the growth of use fixed number of year to survive, the valve on the whole paper, channel flat and smooth for a straight line, no flow resistance coefficient, pressure loss, can pass the ball line. 2, seat tightly closed embedded on the surface of PTFE, PTFE and metal twofold tightly closed, because the tightly closed surface parallel to the opening and closing of PTFE and eliminate the effectiveness of ram dirt. The product default is reasonable, compact structure, its unique special preset solves the common valve for gas and coke and series of problems such as actuating gate closed lax, pay for leakproof, and tight up valve sealing performance and use fixed number of year of survival. Tightly closed office principle: 1, the o-rings give pre-tightening force causes the tightly closed pressure, formation at first appearance PTFE ring into the seat tightly closed 2 inlet pressure is greater than the outlet pressure, the disc moves to the right, to export the seat, and to achieve export tightly closed, because the effectiveness of inlet pressure, forced to do disc close to the export of PTFE seat rings. The PTFE ring compression, until the ram stops in the seat, so to form the metal ( Ram) For PTFE ring and the metal twofold tightly closed. 4, the first FaYue valve rod tightly closed sees fit and use structure without packing pressure, stuffing box place o-rings envelope structure, tightly sealed performance is good, the common fault of the stuffing box leak solves the common valve. Second, the structure is explained and office principle 1, seat right and use o-rings floating seat tightly closed and give pre-tightening force structure makes the import two-way valve tightly closed, gate sees fit and use parallel type makes the valve closed moment only for ordinary 1/2 of the valve. 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 Industrial Valves 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 Industrial Valves, oil valve, hydraulic control valve and other kinds of valves.
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