Butterfly valve test installation and troubleshooting methods

First, the butterfly valve test and adjustment 1, whether the butterfly valve manual, pneumatic, hydraulic, electric parts are strictly debug before leaving the factory, the user re-sealant performance, the import and export sides should be evenly fixed, close the valve , Exert pressure on the inlet side and observe whether there is leakage on the outlet side. Before the pipe strength test, the plate should be opened to prevent damage to the seal pair. 2, although the butterfly valve factory inspection and rigorous testing, but there are also individual products in the transit automatic screw displacement, the need to re-adjust, pneumatic, hydraulic, etc., please read the package drive manual. 3, electric transmission butterfly valve control mechanism has been opened, closed stroke adjusted. To prevent the power is turned on the wrong direction, the user first turn on the power, the first open manually to the semi-open position, press the electric switch to check the direction of the disc and valve closing direction can be consistent. Second, the common fault and eliminate the butterfly valve 1, the installation before the road to confirm the performance of our products and media flow arrow is consistent with the movement conditions, and plug the valve cavity clean, not allowed in the ring and disc attached There are foreign bodies, not clean before the butterfly must not be closed, so as not to damage the seal. 2, the flange plate supporting the installation of special disc flange recommended, that is HGJ54-91 socket welded steel flange. 3, installed in the pipeline location, the best position for the legislation, but can not flip. 4, the need to regulate the use of traffic, a worm gearbox control. 5, open, close the number of disc valve, in about two months time, open the worm gear box cover, check the butter is normal, should maintain the right amount of butter. 6, check the connection parts require compression, that is, to ensure that the filler bees sex, but also to ensure flexible stem rotation. 7, metal seal butterfly valve products are not suitable for installation at the end of the pipeline, such as must be installed at the end of the pipeline, the need to take the export flange, to prevent the backlog seal, over. 8, the valve stem to install the use of regular inspection of the valve to check the effectiveness of the use, found that the failure to be ruled out in time. 9, the possible failure to eliminate the way as shown below: Possible failure: 1, sealing surface leakage reasons: 1, butterfly plate, sealing surface folder debris 2, butterfly plate, sealing surface close position is not correct 3, the outlet Side of the flange bolt installed uneven force or not in accordance with the requirements of a map 4, the pressure test direction is not required according to Figure 1 Elimination: 1, to eliminate impurities, cleaning the valve cavity 2, adjust the worm or electric actuator adjustment screw, In order to achieve the correct valve closing position 3, check the flange with the plane and the bolt pressure on the country should be uniform compression 4, press the tip sealing direction pressure failure: 2, the valve leaks at both ends: 1, both sides of the gasket Piece failure 2, the pipe flange uneven or not compressed 3, the seal ring, the seal gasket failure elimination method: 1, replace the seal gasket 2, press the flange bolts (uniform force) 3, unloading Under the valve pressure ring, seal replacement, failure pads

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