What fails first
The wear items on an oil-injected screw compressor are predictable: inlet filter, oil filter, oil separator, oil itself, and the drain valves and belts around them. On the air treatment side it is filter elements, desiccant and drain kits. Our spare parts range covers the components that sit behind these - motors, fans, valves, controllers and sensors - for machines already in service.
| Item | Why keep one |
|---|---|
| Inlet filter | Cheapest efficiency item; a restricted inlet shows up as lost output |
| Oil filter | Protects bearings; a blocked filter bypasses dirty oil |
| Oil separator | Rising differential costs energy every hour |
| Oil (correct grade) | Wrong oil is worse than old oil - keep the specified grade |
| Drain valve kit | The most common cause of water at the tool |
| Pressure / temperature sensor | A drifting sensor turns into a control fault |
How much to stock
Base the quantity on failure interval and lead time, not on guesswork. If an element lasts 4,000 hours and takes 3 weeks to arrive, one spare on the shelf covers the whole interval. If a sensor has a two-day lead time and a one-year interval, stocking it is optional - but knowing the part number is not.
Genuine versus equivalent
- Filters and separators - specification matters more than logo; check micron rating, collapse pressure and flow.
- Oil - use the grade the machine was built for; mixing grades can cause foaming and carryover.
- Sensors and controllers - match the signal type and range exactly, or the control loop will misbehave.
- Motors - confirm frame, mounting, speed and protection class (IP rating) before substituting.
Record keeping
A simple log of what was changed, when and at what hours turns a parts list into a maintenance plan. It also makes warranty conversations and fault diagnosis much shorter, because the history is visible rather than remembered.
Browse the range on the all spare parts collection page.
Tell us the working pressure, flow and site conditions and we will propose a configuration. Contact OPPAIR.