Soft-sealing gate valve and hard seal gate valves are the two big gate valve series classification, hard seal and soft seal can sometimes make up for each other, sometimes are independent of each other, then the soft-sealing gate valve and hard seal gate valves have what relation? What the main difference? The next valve small make up will unravel this riddle for you. 1 soft-sealing gate valve, sealing materials, seal on both sides of a side is the metal material, on the other side is elastic nonmetallic material called & quot; Soft seal & quot; 。 This seal sealing performance is good, but not high temperature resistant, easy to wear and mechanical was lacking. Hard seal gate valves: both sides of the sealing pair are metal materials or other materials harder called & quot; Hard seal & quot; 。 This seal sealing performance is poor, but high temperature resistance, wear resistance, good mechanical performance. 2, structure, mechanism of hard seal gate valves is the sealing between metal and metal, metal sealed ball and seat are. The machining accuracy and process is difficult, generally used in high pressure, often more than 35 mpa. Soft-sealing gate valve is sealed between the metal and nonmetal, such as nylon tetrafluoroethylene, manufacturing standards are the same. 3, selection of equipment type selection of soft and hard seal gate valves mainly on the basis of process medium, temperature and pressure, the general medium containing solid particles or with wear or temperature higher than 200 degrees had better choose hard seal, diameter greater than 50 Industrial Valves pressure difference is bigger also considered open valve torque size, large torque should be chosen when hard seal fixed ball valve, sealing level for both hard and soft seal can reach level 6. 3, soft-sealing gate valve seal commonly use conditions can achieve very high, while hard seal according to the requirements can be high to low; Soft seal need to fire prevention, because at high temperatures, soft sealing material will leak, and hard seal is not the problem; Hard seal generally can do high pressure, soft seal is not; Soft seal due to the problem of flow medium, is can't use some occasions, the last hard seal valves are generally more expensive than the soft seal. In manufacturing, both difference is not big, is the seat of the main difference, non-metallic, soft seal is is metal hard seal. Through the above introduction, believe everybody can understand soft-sealing gate valve and hard seal gate valves where difference is, with the continuous development of China's industrial market, the soft-sealing gate valve and hard seal gate valves difference is necessary to understand, this may affect not only the production efficiency, at the same time may also greatly influenced the economic benefits. Soft-sealing gate valve and hard seal gate valve products figure

soft-sealing gate valve

hard seal gate valves

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