Flexible butterfly valve

The utility model is suitable for opening and closing or adjusting the medium flow in the supply and drainage pipelines of underground pipelines, and has the characteristics of moisture resistance, corrosion resistance and long service life. Standard: design standard: GB/T12238-1989 flange connection size: GB/T9113.1-2000; GB/T9113.2-2000 GB/T9115.1-2000; GB/T9115.2-2000 pressure test: GB/T13927-1992; JB/T9092-199 net flange telescopic butterfly valve, flanged telescopic butterfly valve, and telescopic butterfly valve. SD343H worm retractable butterfly valve is suitable for food, medicine, chemical, chemical, chemical, petroleum, textile, paper, paper, water supply and drainage and intercepting medium, which can compensate the heat expansion and contraction of the pipe, which is less than 80 C and the nominal pressure is less than 1.6MPa. Its main features are as follows: new design, reasonable, unique structure, light weight, easy operation and quick opening and closing, and the expansion butterfly valve can provide convenience for the installation of replacement and maintenance valves in addition to the function of regulating and intercepting the flow and compensating the thermal expansion and shrinkage function of the temperature difference of the pipe. The sealing part can be adjusted and replaced, and the sealing performance is reliable.

Design standard: GB/T12238-1989
Flange connection size: GB/T9113.1-2000; GB/T9113.2-2000
GB/T9115.1-2000; GB/T9115.2-2000
Stress test: GB/T13927-1992; JB/T9092-1999