Flange retractable butterfly valve , not only for the valve disassembly and assembly to bring convenience. And can relieve the pipeline stress, protect the valve. At the same time, it also concentrates the installation method of butterfly valve and telescopic device making the space more compact. In general, this kind of valve does not need special maintenance. Only to regularly observe the expansion part of the leakage and the phenomenon such as pulling off. Telescopic flange butterfly valve in the initial cost is lower than the installation of flange butterfly valve plus telescopic device, but considering the maintenance cost in the future, instead of the loss.
If the butterfly valve sealing part is damage and can not replace the seal ring to scrap the butterfly valve. Even the expansion part together scrap, the loss is greater. Such as butterfly valve sealing part of the need to maintain, only by compressed telescopic part is unable to realize the valve open online free maintenance. And installation of butterfly valve and expansion has a great advantage, only lending expansion, namely have artificial maintenance space, free open the valve maintenance.
Telescopic flange butterfly valve suitable for temperature ≤80℃, used for petroleum, chemical food and medicine textile, papermaking, electricity, water supply and drainage, gas pipeline, for regulating the flow rate and blocking the role of media. It has the function of compensating pipe expansion and cold contraction. Novel design, reasonable, unique structure, light weight, easy to operate, quick to close.
Notes for installation and use of telescopic flange butterfly valve:
1, Expansion flange butterfly valve must be flat before installation, do not knock against.
2, Telescopic flange butterfly valve factory structure length is the minimum length, when the installation, pull to the installation length (that is, the design length).
3, When the length of the pipeline exceeds the installation length of the telescopic valve, please adjust the pipeline interval, do not force the telescopic valve to avoid damage to the telescopic valve.
4, Telescopic flange butterfly valve butterfly valve can be installed in any position. To do temperature compensation, after the completion of pipe installation, need to be along the direction of the pipe axis at both ends of the bracket. To prevent the telescopic valve telescopic pipe pull out, the supporting force of the bracket according to the following formula calculation, operation is prohibited to remove the bracket.