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type pneumatic three-position butterfly valve and
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type pneumatic single-electrically controlled two-position butterfly valve. The pneumatic three-position butterfly valve is divided into three types of wind: strong wind, medium wind and small wind. The maximum openings are
. Three pilot solenoid valves are used respectively. control. The medium and small winds are the air volume required for burner combustion, and the high winds are the wind used to cool the workpiece, which meets the specific process and the occasion where the cooling curve needs to be controlled.
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The small air opening of the pneumatic single electronically controlled two-position butterfly valve is
adjustable, and it is a normally open large air
range Adjustable at will.
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Pneumatic two-position butterfly valve is composed of pneumatic actuator and butterfly valve.
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The pneumatic actuator consists of a single-acting cylinder and a pilot solenoid valve. It is controlled by the pilot solenoid valve to realize the opening and closing of the valve. There is a set of piston limit adjustment mechanism in the cylinder to adjust the stroke of the piston, so as to realize the adjustment of the valve opening.
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The butterfly valve is composed of the valve body, valve plate, rotating shaft, connecting rod, etc. It converts the stroke position of the piston rod into the opening of the valve plate. And the actual opening value is directly read out by the pointer display device.
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A heat insulation layer is provided at the connection between the valve body and the cylinder bracket to reduce heat transfer to the cylinder.
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This valve should be installed in a clean environment with a certain amount of space, and attention should be paid to keeping the pilot solenoid valve in an upright position.
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This valve is equipped with a set of expanded joints (interface
/
, nut
) at the air source inlet, Prepared by the user￠
The copper will introduce the gas source.
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The control air source introduced into this valve should be equipped with three major pneumatic devices, and the pressure of the air source should be controlled within the range of
~
.
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The control air pressure should be selected within the specified range according to user conditions to ensure that the cylinder piston is pushed.
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The pilot solenoid valve is normally closed and can be opened when energized. Each pilot valve body is equipped with a manual rotating shaft. When there is a sudden power outage, manual emergency opening and closing can be achieved by simply turning the rotating shaft. The groove of the rotating shaft should be horizontal at ordinary times.
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The adjustment of the piston stroke is completed by the adjusting mechanism. Different working conditions require different limit adjustment mechanisms. When adjusting the wide opening, first loosen the locking nut, then rotate the adjusting nut to the desired position and then tighten it. When adjusting the small opening, first loosen the set screw under the bracket, then rotate the knurled nut or adjusting rod to the required position.
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The dynamic and static seals of the cylinder all adopt standard
type sealing rings, the specifications of which are
Use
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When ordering, users should make the correct choice according to whether the installation form of their pipelines is horizontal pipelines or vertical pipelines.
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< Troubleshooting and troubleshooting
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: : )r , , < br br : < Fault phenomenon
br br : < Cause of the fault
br br : < Troubleshooting method
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< r br br The valve does not move after the coil is energized
br br The control solenoid valve coil is burned out
br br Replace the coil
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< br br The movable iron core controlling the solenoid valve is stuck by dirt
br br Remove and clean the movable iron core of the iron core seat
< br br There is foreign matter on the air source mounting plate or the control valve port
br br Use compressed air to blow through to clear it
< br br The control solenoid valve is normal Action,
Strong wind cannot fully open
br br Piston
The ring is aged and worn, the piston is leaking, the piston
The ring The interference with the cylinder cavity is not enough
br br Replace the piston
ring and increase the air source pressure
< br br It is difficult to adjust the small wind
br br When adjusting the small wind, the set screw under the triangle bracket should be loosened. After adjustment, it should be tightened to prevent the knurled nut from self-locking
br br While turning the manual screw under the control valve with a screwdriver, push the knurled nut up and down. You can also use a slotted screwdriver to turn the knurled nut
< br br Air leakage from the top of the control valve
br br There is foreign matter on the upper end of the control valve core seat
br br Remove and clean the core seat or replace the control valve
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DQSW2 pneumatic two-position butterfly valve manufacturer