Proper operation method of pneumatic valve

the pneumatic valve is in a fluid system is used to control the direction of the fluid, pressure, flow of the device is to make the piping and equipment within the medium ( Liquid, gas and powder flow or stop and can control the flow of the device, pneumatic valve is a key control component in fluid conveying system. Preparation before operation,

pneumatic valve before operation, should read the instructions carefully. Before operation must clear the flow of gas, we should pay attention to check the pneumatic valves open and close. Check the appearance, pneumatic valve to see if the pneumatic valve be affected with damp be affected with damp, if there be affected with damp be affected with damp be dry processing. If it is found that there are other problems should be handled in a timely manner and shall not take fault operation. If it is disabled months above electric pneumatic valve, should check before starting clutch, confirm the handle after the manual position, check the insulation of the motor, steering and electrical wiring. Manual pneumatic valve

the correct way of operating manual pneumatic valve is the most widely used pneumatic valve, it of the handwheel or handle, is designed according to the ordinary human, considering the strength of the sealing surface and the necessary closing force. So you can't use hand lever or long board to board. Some people used to use the wrench, should strictly note, when you start the pneumatic valves shall be smooth, hard to avoid too hard and cause pneumatic valve opening and closing, strength should be smooth, not impact. Some impact open/close the high-pressure pneumatic valve parts have considered the impact and general pneumatic valve can't wait.
when pneumatic valve fully open, should reverse a little hand wheel, the tightness between the screw thread, so as to avoid looseness damage. For rising stem pneumatic valves, to remember the full open and full closed when the pneumatic valve stem position, avoid impact when they hit the open top dead center. And easy to check when full close to normal. If pneumatic valves do fall off, or pneumatic seal between the valve core embedded large sundry, the variation of pneumatic valve stem position will be in full close. Pneumatic valve sealing surface or the damage of the pneumatic valve handwheel.
the pneumatic valves open sign: pneumatic ball valve, pneumatic valve, cock pneumatic butterfly valve pneumatic groove parallel to the channel of the stem end face, show that pneumatic valve in full open position; When the pneumatic valve rod rotate to the left or right. , grooves and vertical channel, which indicates that pneumatic valve in the fully closed position. Some pneumatic ball valve, pneumatic valve, cock pneumatic butterfly valve with a wrench and channel flat open, vertical to shut down. Tee, four-way pneumatic valve should be according to the opening and closing operation, reversing the markup. After the operation should take activities under the handle.
security the right operation method of pneumatic valve pneumatic valve before installation is
security after pressure testing, constant pressure. Safe and pneumatic valve operation for a long time, the operator should pay attention to check the safety of pneumatic valves, check, people avoid safety pneumatic valve outlet and check the safety of the pneumatic valve seal, with lever up the safety of the wrench, pneumatic valve, open a period of time, between drainage in addition to dirt, check security flexibility of pneumatic valve.
the right operation method of hydrophobic pneumatic valve
hydrophobic pneumatic valve is easy to water pollution and other sundry jam of pneumatic valve. When enabled, the first open the pneumatic valve, flush pipe flushing. Beside a by-pass pipe, can open air dynamic transient flush valve. Not wash pipe and by-pass pipe hydrophobic pneumatic valve, can remove the hydrophobic pneumatic valve, open the cut after rinse, then closed to cut off the pneumatic valve, pneumatic valve installed on the hydrophobic, and then open to cut off the pneumatic valve, enabling the hydrophobic pneumatic valve.
the right operation method of reduced pressure pneumatic valve before
reduced pressure pneumatic valve, pneumatic valve or flush valve should be open by ventilation, cleaning the dirt pipeline, pipeline after rinse, close beside the ventilation pneumatic valve and flushing valve, and then enable the reduced pressure pneumatic valve. There is hydrophobic before some steam pressure pneumatic valve pneumatic valve, need to open, then slightly open cut off after the decompression pneumatic valve pneumatic valve, finally cut the reduced pressure in front of the pneumatic valve pneumatic valve open, watch the reduced pressure pneumatic valve and pressure gauge, adjust the vacuum pneumatic valve adjusting screw, the pneumatic valve after pressure to the expected value, then slowly open cut off after the decompression pneumatic valve pneumatic valve, pneumatic valve after pressure correction, until satisfied. Fixed adjustment screw, cover and helmets.
if the relief pneumatic valve failure, or to repair, should slowly open the vent valve, and close the pneumatic valve, pneumatic valve before cut off by manual adjustment roughly vent valve, make the pneumatic valve after pressure relief basically stable at a predetermined value, close vacuum pneumatic valve replacement or repaired again, back to normal again.
check the correct operation method of pneumatic valve
in order to avoid check pneumatic valve is closed instantly formed high impact, pneumatic valves must be closed quickly, thus to prevent the reverse form great speed, the backflow speed suddenly in the pneumatic valve closing is the reason why the impact pressure. As a result, the closing speed of pneumatic valves shall be the downstream medium attenuation speed matching correctly.
if the downstream medium speed range is very large, the minimum flow rate is not enough to force shut down steadily stop. In this case, close a movement can be used within the scope of the action of a damper to suppress. Close a rapid vibration, can make the pneumatic valve moving parts wear too fast, causing premature failure of pneumatic valve. If medium for pulsating flow, close a rapid vibration is caused by severe disturbance of medium, where there is this kind of situation, check pneumatic valve shall be placed in medium minimum disturbance.