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How Do You Drain an Air Water Separator?

Published in Air System Maintenance 3 mins read

To drain an air water separator, you typically locate the drain valve or petcock at the bottom of the unit and open it to allow the collected water and contaminants to exit.

Why Draining is Essential

Air compression generates moisture, which condenses into water within the air lines. An air water separator, also known as a water trap, is installed to capture this liquid water before it can travel further into the system.

Regularly draining this trapped water is crucial for several reasons:

  • Preventing Damage: As mentioned in the provided reference discussing SMC Water Traps for air suspension, accumulated water, especially in cold environments, can freeze and damage your system. Freezing water expands, potentially cracking components or blocking lines.
  • Maintaining Performance: Excess water can reduce the efficiency of air tools or equipment downstream and may lead to corrosion.
  • Ensuring Air Quality: Draining removes contaminants carried by the moisture, ensuring cleaner air flow.

General Steps for Draining

While specific designs may vary (like the SMC Water Trap shown in the video reference), the fundamental process for draining most air water separators involves:

  1. Locate the Drain: Find the drain valve or cock at the lowest point of the separator bowl.
  2. Open the Valve: Manually turn or press the drain valve. You may see a stream of water and potentially oil or rust draining out.
  3. Allow Drainage: Let the unit drain completely until only air comes out, or follow manufacturer instructions for duration.
  4. Close the Valve: Once drained, securely close the drain valve to prevent air leaks.

Note: Some water separators feature automatic float drains that discharge water automatically when it reaches a certain level, eliminating the need for manual draining. Always consult the specific manual for your air water separator.

Context: SMC Water Traps in Air Suspension

The reference specifically highlights water traps for "all your air suspension needs." In air suspension systems, preventing moisture from entering components like valves, airbags, and compressors is vital for longevity and reliable operation. Brands like SMC are known for manufacturing pneumatic components, including water separators, used in various applications, including vehicle air suspension. Properly draining these units, as the video implies the importance of, directly contributes to the health and performance of such systems.

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