In order to solve this kind of title on the valve tightly closed did try and improve the structure and material. Scratch a bit need to disassemble repair, abrade serious has been abandoned by destruction, the consequences of such a pay increase the company's production capital, and affects the performance of the valve. Because of the special movement principle, the structure is also contributing to the stress between the valve tightly closed vice very bad consequences ( Form both tightly closed between vice be vertical pressure, and tightly closed the relative slip between vice friction) 。 Surfacing on stem tightly closed cone abrasion resistance good department too hard alloy, although this way to get a good effect, but on the one hand, because the company too alloy capital is too high, on the other hand because basic materials for 13 cr martensitic stainless steel stem, poor weldability, welding preheating before welding, when the warm down after welding welding process complex. (2) changes in vice materials tightly closed. Practice has proved that the valve tightly closed only on opening and closing of a few times, is because of the tightly closed pair between the scratch and actuating. 。 1) move tightly closed on parts of the valve stem on the disc ( Goal is in the process of loading, the valve tightly closed in on the expression of valve cover tightly closed surface at rest on the no slip condition) 。 Additional, in order to guarantee the size precision of the valve stem, increase the rough machining process. Tightly closed on this although improvements can improve the survival of the fixed number of year, but because of the need to add a Marine valve disc cover and disc tightly closed between have more complex structure, low cost performance. Comprehensive analysis, in addition to the special requirement, this plan its price also is very bad. Q: as of the valve tightly closed on survival of progressive increase of several commonly used way of answer: by the valve has simple structure, can be through the valve stem rotation and the principle of up and down, the valve open or cut off, and to ensure that the valve tightly closed and tightly closed on function. Practice has proved that improve stem cone hardness is progressive increase by the valve tightly closed on the feasible method of the duration of survival. 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 Industrial Valves, relief valve, safety valve, Marine Industrial Valves, oil valve, hydraulic control valve and other kinds of valves.
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