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4.5. Implosion Blowback Connection
The clearing valve (implosion blowback valve) is located on the outlet of the vacuum filter.
Connect the clearing valve to a 60-80 PSI (4.1-5.5 Bar) compressed air supply. Compressed air
must be clean, dry and free of oil.
Run a 3/8” (9 mm) branch line to supply the vacuum hoppers in your system. Install a 3/8” (9
mm) x 1/8” (3 mm) tee valve in the up position near the filter chamber.
Connect shop compressed air to port number 3 on the clearing valve solenoid with 1/4” (approx.
6 mm) poly tubing. Connect port number 2 to the clearing valve. Port 1 is to be exhausted to the
atmosphere. (See Figure 2).
The 3/8” (9 mm) branch supply line should include a shut-off valve for on/off control, an air
filter/pressure regulator with a gauge for pressure control, and mini-lubricators located at each
vacuum receiver. Install a quick-disconnect fitting or a shut-off valve in the compressed air
piping leading to the vacuum receiver’s clearing valve to speed receiver cover removal for
cleanout or service.
Note: XFC-A style filters also include a sealing valve mounted to the inlet of the filter
chamber. This valve is pre-piped to the main solenoid.
Figure 2: Clearing Valve Compressed Air Connections
