ROTARY SCREW COMPRESSOR REPAIR & SERVICE

The most common culprits are a dirty oil cooler, low oil level, degraded oil past its service life, a stuck thermal valve, or a failing cooler fan. High ambient temperature in the compressor room makes all of these worse. We diagnose the actual cause instead of just resetting the fault — repeated high-temp shutdowns cook the oil and shorten airend life.

Usually one of four things: the inlet valve isn't opening (so the unit runs unloaded), the air/oil separator is blinded and choking flow, the minimum pressure valve is stuck, or demand has outgrown the machine — often because of piping leaks. We test each in sequence and give you a straight answer, including when the fix is a leak repair rather than compressor work.

Oil downstream typically points to a failed or saturated air/oil separator element, an overfilled sump, a plugged scavenge line, or foaming from the wrong oil. Left alone it contaminates dryers, ruins point-of-use filters, and can reach your product. Separator and scavenge line service is routine work for us.

It depends on run hours and conditions, not just the calendar. As a baseline: oil filter and air filter by hour rating or annually, separator element per the manufacturer's differential-pressure limit, and oil per its rated life confirmed by sample analysis. We build the schedule around your actual duty cycle rather than a generic interval.

Yes. We troubleshoot variable-speed drives, starters, contactors, pressure transducers, temperature probes, and controller faults on rotary screw units. Drive and control issues often masquerade as mechanical problems — proper diagnosis saves you from replacing parts that were never bad.

We'll tell you honestly. A worn airend on a small, older unit often isn't worth rebuilding, while a well-maintained larger machine usually justifies repair. We quote the repair, explain the machine's condition, and let you make the call — we don't push replacements.