Flange applications: telescopic butterfly valve flange telescopic butterfly butterfly plate installed on the diameter of the pipe direction. In telescopic cylindrical channels in butterfly valve body, disc disc around the axis of rotation, the rotation Angle of 0 & deg; ~90° Between, rotate to 90 & deg; When the valve is fully open. Suitable temperature & le; 80 ℃, used in oil, chemical food, medicine, textile, papermaking, electric power, water supply and drainage, gas pipeline, to adjust flow and intercepting the role of the media, has the function of compensating pipe heat bilges cold shrink. Flange telescopic butterfly Industrial Valves advantages: the flange (scalable butterfly valve Structure length is within a certain range scale) , both for the valve disassembling bring convenience, can ease the piping stress again, protect the valve and also concentrated the butterfly valve and expansion pipe installation, space more compact. Usually, this kind of valve does not need special maintenance, just observe the telescopic part regularly whether there is leakage and pulled off wait for a phenomenon. Flange telescopic flange butterfly valve and butterfly valve at the beginning of the investment cost is low expansion pipe installation way, but to consider maintenance costs in the future, but do more harm than good. Such as butterfly valve sealing parts to replace damaged seal ring to scrap butterfly valve, the telescopic part connected scrap, loss is bigger. 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, which have artificial maintenance space, free open the valve maintenance ( Butterfly valve, adjustable light and scale down the labor intensity is low) 。 Flange telescopic butterfly valve installation note: 1, the disintegration of pipeline construction site is strictly prohibited free disassembly telescopic flange butterfly valve butterfly valve; It is strictly prohibited to repeatedly stretched at random pressure short telescopic butterfly valve at the scene. 2, telescopic pipe must work on both ends of the valve, the two flanges in the pipeline parallel to the surface requirements; 3, fastening flange fixed bolts should be symmetry, do not unilateral to tighten the flange fixed bolt; 4, after the expansion pipe installed in the Industrial Valves; 5, expansion valve telescopic part shall not be installed in a pipe or pipe ends around the corner. 6, telescopic flange butterfly valve before installation must be flat, do not arbitrarily knock against; 7, telescopic flange butterfly valve factory structure length is minimum length, when installation, pull to install length ( The design length) ； 8, when the pipeline length exceeds telescopic butterfly Industrial Valves installation length, please adjust the pipe spacing, do not forcibly pull line expansion valve, so as not to damage the expansion valve; 9, telescopic flange butterfly valve, butterfly valve can be installed in any position, as temperature compensation, the pipe installation is completed, should be along the pipe axis direction with bracket, prevent the expansion valve pull telescopic pipe, support according to the following formula of supporting force, runtime will support removing is strictly prohibited; 10, telescopic flange butterfly valve temperature compensation at the same time, don't do only do easy installation and replacement, repair valve unavailable, available bolt spacing, symmetrical clamping pull telescopic flange butterfly valve in order to prevent the expansion pipe, damage the telescopic butterfly valve and pipe unit or building. Flange bolt diameter, bolt diameter can be in accordance with the bolt strength and test under pressure and pipe, according to the formula to calculate the type, operation time limit bolt it is forbidden to unload ( Bolt to match) 。
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