Daily butterfly pneumatic valve problems

in the daily work of the failure and elimination method of pneumatic valve adjustment:
before installation, please make sure the product 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 installation position in the pipeline, the optimal location for the vertical loading, but can't flip. Need to adjust the flow in the
and use of, have 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.
and 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 regular check pneumatic valve using effect, find fault in a timely manner to eliminate.
and the possibility of failure in a timely manner to eliminate method as bellow: adjustment of pneumatic valve common failures and solutions
the possibility of fault sealing leak

reasons, butterfly plate, seal face with sundry
, butterfly plate, seal face closed position match not
configuration, export side flange bolt uneven or not
and direction according to the requirements of figure 1 is not in accordance with the requirements of figure a

elimination method, eliminate impurities,
clean pneumatic valve lumen, adjust the adjusting screw of worm gear or electric actuator, pneumatic valve to the closed position right
, check with telescopic flange plane and bolt pressure, should be uniform pressure
, according to direction pointed seal pressure pneumatic valve

two transverse leakage eliminating methods, on both sides of the sealing gasket failure
, uneven tube flange force or pressure
, sealing ring, sealing gasket failure sealing gaskets

, replacement, compression flange bolts ( The uniform stress)
, pneumatic valve pressure ring, replace the sealing ring, failure gaskets