Air Filter Cartridge for Remeza Aircast LB-50 / LB-75
Part No. 21125014 (LB-50) / 21175007 (LB-75) / 21175003 (assembly) — Dimensions ∅65×62 mm, inner ∅36 mm
Replacement air filter cartridge for Remeza / Aircast LB-50 and LB-75 piston compressors. The filter protects the pump cylinder bores from dust, abrasive particles and contaminants in the intake air. Timely replacement is the most important factor in protecting the cylinder-piston group and valves.
Part Numbers and Application
| Replacement cartridge for LB-50 | 21125014 |
| Replacement cartridge for LB-75 | 21175007 |
| Filter assembly (LB-50 and LB-75) | 21175003 |
| Application | Remeza / Aircast LB-50, LB-75 and compatible equivalents |
Cartridge Dimensions
| Height (H) | 62 mm |
| Outer diameter (OD) | 65 mm |
| Inner diameter (ID) | 36 mm |
Number of Filters Required per Compressor
| Pump block model | Configuration | Filters required |
|---|---|---|
| LB-50 | Two-cylinder | 2 pcs. |
| LB-75 | Three-cylinder | 3 pcs. |
Each cylinder has its own individual air filter — order the correct quantity at once.
Air Filter Maintenance Schedule for LB-50/LB-75
| Interval | Action |
|---|---|
| Every 100 hours (or monthly) | Inspect condition, blow out cartridge with compressed air from outside inward |
| Every 600 hours (or at least annually in clean environments) | Full cartridge replacement |
| Unscheduled | Immediate replacement if inner surface is dirty or cartridge colour has changed |
In dusty conditions (woodworking, construction, manufacturing) the replacement interval must be shortened significantly.
Consequences of Not Replacing the Filter on Time
- Reduced delivery — a blocked filter restricts intake air volume; the compressor takes longer to build pressure.
- Valve failure — increased vacuum accelerates wear and destruction of the intake, outlet and check valves.
- Abrasive wear of the CPG — running without a filter or with a damaged element allows dust and grit directly into the cylinders. Cylinder scoring, overheating, full pump head overhaul required.
- Economic losses — higher power consumption; pump head repair can cost up to 70% of the compressor’s purchase price.
Tip: Combined Maintenance at Filter Change
At every air filter change, also check:
- Oil level — must be at the central red mark on the sight glass. Fill volume for LB-50: 1.7 litres.
- Belt tension — deflection at a force of 20–40 N should be 5–6 mm. A slack belt reduces performance and efficiency.
- Receiver condensate drain — drain daily under intensive operation.
The 600-hour filter change interval also coincides with a scheduled service including oil change (oil every 300–500 hours; first change after 100 run-in hours).
Piston compressor oil in stock at Acvatron.
Frequently Asked Questions about the LB-50/LB-75 Air Filter
What is the part number for the Remeza Aircast LB-50 air filter?
Replacement cartridge for LB-50 — part 21125014. Assembly — 21175003. One LB-50 requires 2 cartridges.
How many filters does each compressor need?
LB-50 (2 cylinders) — 2 filters. LB-75 (3 cylinders) — 3 filters.
How often should the air filter be replaced?
Blow out every 100 hours. Full replacement every 600 hours (annually in clean environments). In dusty conditions — more frequently.
What happens if the filter is not replaced on time?
Reduced delivery, valve failure, dust in cylinders — CPG wear. Repair can cost up to 70% of the compressor’s price.
What are the cartridge dimensions?
Height — 62 mm, OD — 65 mm, ID — 36 mm. Identical for LB-50 and LB-75.
See also: Piston Rings LB50/LB75 | Piston Compressor Oil | Remeza AirCast Compressors
