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Air Filter & Separator Element Replacement

Updated
Applies to: STS Series (5–30HP) · STSH Series · STSD · STSP · STSP2

Service Intervals by Model

Model Family Air Filter Element Air Filter Cleaning Separator Element
STS (5–30HP) Every 2,000 hrs or 6 months Every 1,000 hours Every 2,000 hrs or 6 months
STSH Every 2,000 hrs or 6 months Every 1,000 hours Every 2,000 hrs or 6 months
STSD / STSD (VSD) Every 2,000 hrs or 6 months Every 1,000 hours Every 4,000 hrs or 6 months
STSP / STSP (VSD) Every 4,000 hrs or 6 months Every 1,000 hours Every 4,000 hrs or 6 months
STSP2 / STSP2 (VSD) Every 4,000 hrs or 6 months Every 1,000 hours Every 4,000 hrs or 6 months

In dusty or unclean environments, replace elements more frequently. Use only OEM original elements — damage caused by non-original parts is not covered under warranty.

Air Filter Element — Replacement Procedure

⚠ Warning Never replace the air filter element while the compressor is running. When removing the element, ensure no dirt or debris enters the suction port.
  1. Press STOP on the control panel. Lock out by pressing the Emergency Stop button. De-energize the compressor at the main disconnect.
  2. Loosen and remove the suction hose from its connection at the air filter housing.
  3. Loosen the air filter housing connection clamp/belt and remove the housing.
  4. Press down on the cover tabs and remove the cover.
  5. Pull out the used filter element.
  6. Insert the new OEM filter element and snap it firmly into place.
  7. Reinstall the cover, securing all tabs in their slots.
  8. Replace the filter housing and reconnect all fittings and the suction hose.
  9. Dispose of the used element per local environmental regulations.

Air Filter Cleaning (Interim — Every 1,000 Hours)

Between element replacements, clean the air filter element by gently blowing compressed air from the inside out (clean side to dirty side). Do not wash. Replace if damaged or excessively contaminated.

Separator Element — Replacement Procedure

⚠ Warning Ensure all compressed air is completely discharged from the separator tank and system before removing the separator element. The separator operates under significant pressure.
  1. Press STOP. Lock out by pressing Emergency Stop. De-energize the compressor.
  2. Close the air outlet valve.
  3. Discharge all compressed air from the separator tank and system. Confirm zero pressure.
  4. Using a suitable filter wrench, remove the separator element.
  5. Clean the separator gasket seat with a clean cloth.
  6. Lightly lubricate the gasket on the new separator element with clean compressor oil.
  7. Install the new separator element by hand — thread on until the gasket seats, then tighten firmly by hand.
  8. Energize the compressor and run under load for several minutes. Inspect all connections for air leaks.
  9. Dispose of the used separator element per local environmental regulations.
ℹ Note — STSD / STSP / STSP2 Models These models include a separator O-ring/gasket as a separate serviceable part. Replace the separator O-ring/gasket at every 4,000 hours or 6 months alongside the separator element.
▲ Attention The separator element is a consumable and is not covered under warranty. Shortened replacement intervals apply in dusty, high-humidity, or high-temperature operating environments.

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For parts or technical support, contact South-Tek Systems: (910) 415-1880 or support@southteksystems911.zendesk.com

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