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What are the requirements for all welded ball valves?

Release date: [November 6, 2019] click through rate:

All welded ball valves are generally used for gas, gas and other gas media, and the medium temperature is generally below 180 degrees. Therefore, generally all welded ball valves are designed with soft sealing, and the sealing materials are f, ppl, etc. for example, the most commonly used models of valves produced by votor valves, such as q61ppl, q361ppl, q367ppl, and q61f, are rarely used due to the temperature relationship of the medium, but some of them are hard sealed H or Y seal will also be used in special working conditions, such as q367h, q67y, etc. What's the difference between hard and soft seals?

 All welded ball valve

Hard seal all welded ball valve: the sealing surface is metal seal, high temperature and high pressure resistance, and the price is slightly higher than that of soft seal. For example, the price of dn200-dn600 caliber is 1.8-2 times of that of soft seal, and the price difference between DN200 and above DN600 is 2-3 times. The soft seal can meet the demand, and there is a big price difference. In addition to the special requirements of customers, the hard seal will not be used.

Soft seal all welded ball valve: it is one of the most used sealing structure forms. For example, the soft seal produced by our factory mainly adopts ppl seal, and some factories adopt f seal. The use of soft seal has the advantages of good sealing performance, affordable price and convenient processing. Since the temperature of the gas generally does not exceed 180 degrees, the use of soft sealing structure can fully meet the needs of customers. Therefore, there are many sealing forms of soft sealing in the project, which is also the main sealing form. As shown in the figure below, the handle type all welded ball valve adopts F and ppl sealing forms respectively.

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