Install different construction requirements of pneumatic valve

pneumatic valve installation quality directly affects the use of it, so I really need to pay attention to, carefully follow the instructions for installation.
installation have to be careful, avoid by all means the impact of brittle materials pneumatic valves.
before the installation, should make a pneumatic valve, check check specifications, identification with and without damage, especially for pneumatic valve stem. Must turn a few times, look to whether skewed, because in the process of transportation, the most easily break pneumatic valve stem. Pneumatic valve and remove the clutter. Pneumatic valve lifting,
don't fastened on the handwheel or pneumatic valve stem, in order to avoid damage to these parts, should wear on the flange.
pneumatic valve is connected to the pipe line, must be clean.
can use compressed air to blow to scrap iron oxide and clay sand, slag, and other sundry. These stuff, not only easy to scratch the pneumatic valve sealing surface of the larger particles sundry ( Such as welding slag) And removing small pneumatic valves, make its failure.
install pneumatic valve, screw should be packing ( Cotton and ramie thread woven with lead or ptfe teflon tape) On pipe threads, package, don't get in the pneumatic valve, pneumatic valve in order to avoid memory product, medium circulation.
installation of pneumatic valves, flange bolt must pay attention to the symmetrical evenly.
pneumatic valve flange and pipe flanges must be parallel to the reasonable clearance, in order to avoid too much pressure pneumatic valve, even cracking. For brittle material and the intensity of pneumatic valves, especially pay attention to.
pneumatic valves and pipe welding, should spot welding first, then will be closed fully open, and then welding die.