Purge & Pressurization systems work if your inlet supplies more air than air LOST through leaks. If your air supply is too low:

• The inert gas or air pressure inside your enclosure is too low to exclude hazardous gas or dust;
• The purge process cannot purge hazardous gas or dust from the enclosure;
• You cannot safely operate electrical equipment or motors;
• The purge unit stops you or the control system firing-up ANYTHING electrical.

We appreciate some readers may be FRUSTRATED. Your plant is down. It’s possible your purge system is doing its job and preventing explosions.

For all systems check:

1. The inlet compressed-air pressure should be between 60 to 115 PSI, 4 to 8 bar. The compressed-air inlet pipe should be at LEAST 3/8″ or 10mm Internal Diameter to ensure sufficient flow. Minimize bends for a smooth air-flow.
2. No preventable air leaks from the enclosure or housing. e.g. unfilled conduit seals, unused holes etc.
3. The enclosure remains properly sealed. Seals should stop water and dust entering the cabinet or enclosure. Normally, seals allow a little pressurized air to escape. However, if the inlet compressed air pressure is/was too high, the pressure bows out the enclosure’s door and sides. This breaks the seal so pressurized air leaks.

Purge & Pressurization systems work if your inlet supplies more air than air lost through leaks. If your air supply is too low:

We appreciate some readers may be frustrated. Your plant is down. It’s possible your purge system is doing its job and preventing explosions.

For all systems check: