3-3 Compressed Air Blowback Connection

To provide proper filter element cleaning, the compressed air supply must be regulated to 80 PSI (5.5 bars). Low air pressure will cause poor filter element cleaning. Air consumption depends on the frequency and length of cleaning air pulses into the filter element.

Connect a minimum of 3/8” (9 mm) air line to the top of the solenoid valve air block. Compressed air must be clean, dry, and free of oil. A filter regulator and shut-off are recommended components of your in-plant air supply. In-line filters can handle small amounts of moisture; in-line desiccant filters or packed beds of granular absorbing polymer can remove oil mist and condensed oil.

You may need to install an accumulator in your air supply system to enhance blowback effectiveness if your system cannot consistently meet these requirements. Make sure you use full-sized 3/8” or larger diameter pipe or tubing when making the connection.

3-4 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 29 below).

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.

 

Port 3: Shop Air In

Port 2: (common)

Port 1: Exhaust

Attach to Clearing

Valve

 

 

 

Figure 29: Clearing Valve Compressed Air Connections

Conveying System Mechanical Components Chapter 3: Installation

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Sterling 882.00379.00 manual Compressed Air Blowback Connection, Implosion Blowback Connection