。 Relatively suitable for close block valve spring is 1 cr18ni9 kind of austenitic stainless steel material, as long as proper disposal, corrosion of liquid chlorine is ability, and can guarantee the quality of the spring. Chromium nickel stainless steel ( Commonly used type 0 cr18ni9, 0 cr18ni9 cr18ni9ti, 1 and 1 cr18ni9ti) Have a satisfactory corrosion resistance, low temperature resistance and erosion resistance, relatively suitable for use in medium of liquid chlorine, its temperature range can be in - Within 196 ~ 600 ℃. Marine valve 3. 4 pilot valve and the flow valve on a pilot valve and flow valve and so is the parts inside the body in direct contact with the media, if these two parts of medium corrosion, are directly affect the survival of closely block valves of fixed number of year, serious when still can show safety accident. Release medium, the valve closed, pump drainage system rest ( 2～3min) (after System pressure groups into a balanced status) Hydraulic driven by a hand pump drain off, release the big spring, by a large spring release force to close the valve flap of pilot valve and the floating and then close the top by the end of valve, complete closure of the valve. So direct contact with the medium of austenitic type stainless steel parts, then according to the different using requirements, identify different heat treatment methods. When tank pressure after opening between the stem and floating disc nuiko with the rapid development of a cavity pressure equalization in the valve, make the floating valve open ( In a small spring under the conduction of thrust and floating disc free fall) And then did not open the top soon by the end of valve, complete opening of the valve. Ptfe good corrosion resistance, small friction coefficient, chemical safe sex is strong, adapt to use in the medium of liquid chlorine. Choose 3 3 materials. 1 body and cover the body and bonnet, come into direct contact with the medium to medium pressure and corrosion, the material under prescribed medium temperature and pressure of the utility must reach the mechanics performance and satisfactory cold, high temperature processing manufacturability. Tightly closed surface and bulk material line expansion coefficient should be close to the body, and inserted tightly closed loop structure is shut, lest initiation under the stress of the utility of relaxation in another. Closely with flow valve block valves can ensure safe operation in the process of liquid chlorine leakage, but its use effect is very bad, medium of liquid chlorine corrosion resistance and suspension viscous chloride makes driving with structure rust or viscous, the valve can not switch. Liquid chlorine is strong toxic things, however, the chemical nature very lively, oxygen is a strong inhibitor, for a variety of things have strong corrosive. 2 office principle using the new close block valves with flow valve ( FIG. 1) When filling medium, by hydraulic system, Hydraulic power components hand pump) Power supply for hydraulic oil cylinder piston push the top of the valve CAM down the stem, at the same time compression spring open pilot valve. 3. 3 spring material spring is the key to close block valve parts, large spring quality influence on the performance of the valve tightly closed and use fixed number of year to survive, the quality of the small spring affect flow blocking performance, and spring is very large extent, depends on the quality in spring materials. This, because if the valve tightly closed urged media pressure and spring force, can not add very large tightly closed power, deputy pick so tightly closed ptfe and chromium nickel stainless steel composite structure. 3. 2 vice because close tightly closed survey block valves for liquid chlorine media device, the material must be tightly closed surface of liquid chlorine corrosion and erosion resistance. Because the body and cover the style is more complex, because the right type and using casting cause. By repeatedly discussion, presupposes a new compact block valves with flow valve. Given the close block valves are installed on the three types of pressure vessel, and we have strong toxicity and the corrosive medium, the body of the casting quality is shut. Q: with close block valves improve flow valve and the default answer: 1 western narrative liquid chlorine used very widely, such as making the 3911, bleaching powder, medical drugs, inorganic chloride, molecular compound plastics and synthetic fibre, etc. Precision casting process more application in recent years, because the nominal size DN 50 mm or less, body and cover think proper and precise casting LCB steel casting, 25 or 35 steel. 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 Industrial Valves, 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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