First, the PTFE seal wafer butterfly valve uses and characteristics 
 The product is sealed by a PTFE valve and stainless steel plate, stem form. For temperature ≤ 150 ℃, low corrosion, or the cleanliness requirements of a certain condition, in the food, pharmaceutical, chemical, oil, electricity, textile, paper and other water supply and drainage, gas pipes for regulating traffic and the closure of the role of media. Its main features are: 1, novel design, reasonable, unique structure, light weight, open and close quickly. 2, operation torque is small, easy to operate, saving smart. 3, can be in any position of installation and maintenance. 4, seals can be replaced, sealing performance and reliable way to achieve zero leakage sealing. 5, sealing materials resistant to aging 
 Second, the PTFE seal wafer butterfly valve standard 
 Design Standards: GB/T2238-1989 flange size: GB/T9113.1-2000; GB/T9115.1-2000; JB78 structure length: GB/T12221-1989 pressure test: GB/T13927-1992; JB/T9092 -1999