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 products are strictly inspected and tested before leaving the factory, there are also some screwdrivers on the way of transportation. To readjust, pneumatic, hydraulic and so on, please read the instruction manual of the drive unit. 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 installation of 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, does not allow the seals and disc with foreign particles attached, Never clean the disc before cleaning, 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. Third, the possible failure and elimination methods 1) sealing surface leakage reasons: 1, butterfly plate, sealing surface with debris 2, butterfly plate, sealing surface close position is not correct 3, the outlet side of the flange mounted bolt force Or not in accordance with the requirements of Figure 1 4, the direction of the test pressure is not required to eliminate Figure 1: 1, eliminate impurities, cleaning the valve cavity 2, adjust the worm or electric actuator adjustment screw to close the valve position is correct 3, check Flange and bolt mounted on the country should be evenly pressed 4, Pointed by the direction of the tip seal 2) Leakage at both ends of the valve: 1, both sides of the gasket failure 2, uneven pipe flange tension Or not pressed 3, the seal, the next gaskets failure to eliminate the method: 1, replace the gasket 2, compacting the flange bolts (uniform force) 3, remove the valve pressure ring, replace the seal, failure Gasket
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