PNEUMATIC UNLOADING PROCESS
NOTICE Never discharge payload into a storage facility of unknown contents or capacity. Before unloading check to ensure the storage facility will accept the total payload. DANGER Always ensure the discharge hose is secured at both ends prior to pressurizing the trailer vessel. A loose hose will bull whip potenƟally causing injury.
1. PosiƟon trailer for opƟmum unloading. 2. Retrieve discharge hose and connect it to the discharge line. 3. AƩach opposite end of hose to adapter on storage facility fill line.
4. Open the pressure control valve. 5. Engage blower or compressor. 6. Open all aeraƟon valves and close pressure control valve and blow down valve to pressurize unit. If cargo does not require aeraƟon, open the Top Air Supply Valve to pressurize the unit. 7. When unit has reached operaƟng pressure open the proporƟoning valve ½ to ¾ of full open. 8. SLOWLY open discharge valve on rear hopper. 9. Adjust the pressure control valve to maintain maximum operaƟng pressure and slight movement of discharge hose. 10. Close the front and center individual hopper aeraƟon control valves on units so equipped. 11. When tank pressure begins to drop rapidly, close rear discharge valve. 12. Open aeraƟon valve on center hopper. 13. SLOWLY open the discharge valve on center hopper.
14. Close the aeraƟon valve on rear hopper. 15. Readjust pressure control valve if necessary. 16. When tank pressure begins to drop rapidly, close center discharge valve.
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