Adjustment of the pneumatic valve test and troubleshooting method 4)

a pneumatic valve, butterfly test and adjustment, the adjustment of manual, pneumatic, hydraulic pneumatic valve products, electric parts are strict debugging before they go out, the user when the re-inspection sealing performance, import and export shall be uniformly fixed on both sides, close the disc pneumatic valve, pressure on suction side, in the export side to observe any leak phenomenon, before the trial, the strength in the pipeline should open the disc plate, to prevent damage to the seal. , pneumatic butterfly valve products are through the strict inspection before they go out and experiment, but there are also individual products in transit automatic screw dislocation, to readjust, pneumatic, hydraulic, etc. , please read the form a complete set of drive operation instruction. , electric drive disc pneumatic valve factory has will control institutions opening and closing of the trip. To prevent power on is the direction to make wrong, the user after the first switched on, the first to open the manual to half open position, in the direction of electric switch check dial with pneumatic valve can be closed in the same direction. Two common faults and eliminate method of pneumatic valve, butterfly, before installation to confirm our products performance and whether the medium flow arrow is consistent with the movement conditions, and insert pneumatic valve inner cavity clean, do not allow foreign impurities in sealing ring and disc attached, before cleaning must not allow closing butterfly plate, so as not to damage the sealing ring. Mating flanges, disc plate installation recommended dish special pneumatic valve flange, HGJ - namely Type socket welding steel flange. And installed in the pipeline position, the best position for the vertical loading, but it can't flip. Need adjustment in the flow, use to control the worm gear box. , on and off a lot of pneumatic valve disc, in 2 months time, open the worm gear case cover, check whether the butter is normal, should keep the right amount of butter. Compression, check the connection parts requirements, namely to ensure that the packing bees, guaranteeing flexible pneumatic valve rod rotation. , metal seal butterfly pneumatic valve products are not suitable for installation in the end of the pipe, such as must be installed in the end of the pipe, fittings export flange, should also be taken to prevent the backlog of sealing ring, too. , pneumatic valve rod installation using reaction regularly check pneumatic valve using effect, find fault in a timely manner to eliminate. , the possibility of failure in a timely manner to eliminate method as bellow:









the possibility of fault reason

method


, butterfly plate, sealing leak sealing surface with sundry, butterfly plate, seal face closed position match is not straight, the export side configuration with flange bolt uneven figure 1 or not according to requirements, test the direction is not in accordance with the requirements of figure a
and eliminate impurities, clean pneumatic valve lumen, adjust the adjusting screw of worm gear or electric actuator, so as to achieve the pneumatic valve closed position correctly, check the equipped with flange plane and bolt pressure, should be uniform pressure, pressure according to sealing direction pointed

two pneumatic valve leak
, on both sides of the seal gasket failure, uneven tube flange force or not under pressure, sealing ring, sealing gasket failure
, replace the sealing gasket, flange bolt clamping ( The uniform stress) , pneumatic valve pressure ring, replace the sealing ring, failure gaskets