Principle of Operation
5.1 Valve Operating Process
Opening sequence: Upstream valve closes → Spool closes → Air bladder inflates
Closing Process: Airbag deflation → Valve core opens → Upstream valve opens
5.2 Pneumatic Conveyor Application Process
Feeding: Pneumatic conveyor discharge valve closes → Exhaust valve opens to vent air → Airbag deflation → Valve core opens → Upstream valve feeds material
Discharge: Upstream valve closes → Exhaust valve closes → Valve core closes → Airbag inflation → Pneumatic conveyor pressurisation → Discharge valve discharges material
Detailed specifications
Actuation | Connection | Nominal diameter | Body material |
Pneumatic (double-acting cylinder) | Flange | DN50–DN300 | CF8 (304)/CF8M (316) |
Seal material | Working pressure | Working temperature | Control Air Supply Pressure |
Nitrile rubber/EPDM rubber/FKM rubber | ≤0.4 MPa | ≤220 °C | 0.4–0.6 MPa |
Wiring Diagram Notes
6.1 Standard Wiring Diagram (System 1)
Upper limit switch: 1-Normally Closed, 2-COM, 3-Normally Open
Lower limit switch: 4-Normally Closed, 5-COM, 6-Normally Open
Solenoid valve power supply: 7-Positive (24V/12V), 8-Negative (can be connected to 220V)
Pressure transmitter: 10-Positive power supply, 11 – Power Negative, 12 – TEST
The earth terminal must be securely earthed
6.2 Integrated Control Board Wiring (System 2)
The control terminal is operated via 24V high/low voltage levels: low voltage (0V) closes the valve, high voltage (24V) opens the valve
Delay time setting: Adjusted via DIP switches, default 3 seconds (requires power cycle to take effect)
Dimensions Table
Nominal diameter | Height | Flange size | Weight |
DN50 | 228mm | 8-M20 | 38kg |
DN100 | 385mm | 12-M20 | 85kg |
DN300 | 1100mm | 22-M24 | 288kg |
Important Notes
Installation Requirements
Never open the valve whilst pressurised.
Do not allow water or wet material to enter the valve.
Ensure the flange faces are coaxial during installation, and tighten the bolts evenly.
Set the pressure regulator to 0.4–0.6 MPa; do not adjust it once locked.
Troubleshooting
Airbag does not inflate
① Check that the pressure regulator is open ② Replace the leaking airbag
Valve provides no signal feedback
① Adjust the limit switch ② Check that the wiring is secure
Ball cannot rotate
① Reset the stuck air bladder ② Replace the bearing sleeve
