Globe valve has simple structure, can through the valve stem rotation and the principle of elevator, the valve open or truncation, and ensure that the Industrial Valves seal and seal function. Due to the special structure of movement principle, and also causes stress between the valve seal is extremely adverse consequences ( Form both the sealing pair must be vertical pressure, and the relative slip between vice friction sealing) 。 Practice confirmed that the valve on the seal tend to open/close a few times, is because of the sealing pair between the bruises and cause leakage. Need to disassemble the repair scratch a little, abrade serious were damaged and destroyed, so the consequences of not only increased the enterprise manufacturing capital, and affect the performance of the valve. In order to solve these questions about the structure of the valve seal and material tested and improved. (1) the valve rod sealing parts on moves to the disc ( Purpose is in the process of loading, the valve sealing surface on the relative cover on the sealing surface in the state of static no slip) 。 This improvement is to progress on the life of the seal, but due to increased between a disc cover and disc sealing structure is relatively complex, price is low. (2) change the seal material. Surfacing on the stem seal cone abrasion resistance good department too hard alloy, this method is good results have been achieved, but on the other hand the division so alloy capital is too high, on the other hand, due to the basic material for 13 cr martensitic stainless steel stem, poor weldability, welding when the preheating before welding, after welding heat preservation suitable welding process complex. In addition, to ensure the dimensional accuracy of the valve stem, but also increase the rough machining process. Comprehensive analysis, in addition to the special requirements, which the price is not good. Carry out a proof, stem cone hardness is progressive feasible methods of globe valve seal life.
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Depending on the scale of the service, Shenzhen Mech Valve Trading Co., Ltd. might also need to hire and manage an overseas workforce and comply with regulatory requirements.
Latest technology and manufacturing equipment has improved the quality of resilient seated gate valve.
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