The problem of leaking flange butterfly valve: under the feeding screw conveyor to the reaction kettle with powdertube mounted on a pneumatic butterfly valve, reactionprocess will be part of the solvent evaporationrecirculation (Bing Tong). If the butterfly valve inner leakage, which increases the solvent consumption, and easy to cause the powder feeding powder agglomerationtube, pipe plug.

To solve the problem root cause: flanged butterfly valvebutterfly valve inner leakage is the selection of. The butterfly from the internal sealing material into the form ofsoft seal and seal. If the dust cake can not be avoided,should consider using other forms of valve.

Testing elastic flange butterfly valve, the pressure ringthis side up flat, then placed on a plane plate andflange, valve outside the garden path basically the same size, if the test press test, the pressing claw to press into the plate, so that the pressure ring is uniformly distributed in the body on the side of the. If the testing is carried out with the blind plate, generally on the clipelastic flange butterfly valve is tested on clamp with two flanges, flange type elastic flange butterfly valvesometimes, users in order to facilitate just below with aflange and the valve bolt is fixed, then, screw press ringon the valve body on the all the pressure medium, the front has said that, these screws are unable to bear all the pressure medium, so no valve leakage with blindboard test, at the same time and the actual use conditionof same.