Dry Scroll Pumps

Tip seals are the polymer strips along the edge of the scroll that seal the compression pockets without oil. They are the main wear item — typical replacement is every 8,000 to 16,000 running hours depending on model and duty, sooner if the pump ingests particulates. A rising ultimate pressure is the usual signal.

Yes, and it is the standard choice where hydrocarbon backstreaming must be avoided — analytical instruments, surface science, load locks. Match the scroll pump's speed to the turbo's foreline load; too small a backing pump leaves the turbo running against a high foreline and it never reaches its rated pressure.

Only in a corrosion-resistant version. Standard scroll pumps have aluminium scrolls and standard elastomers that halogens and acids attack. Chemical-duty models use coated scrolls and chemically resistant seals; even then, a purge and a downstream trap are normally required.

Worn tip seals first, then a blocked inlet filter, a leaking inlet fitting, or dust in the scroll set. Replacing the tip seal kit restores most of the performance; if it does not, check the bellows and the shaft seal, and inspect the scroll faces for scoring.

Yes — tip seal kits, bearing and seal sets, fixed and orbiting scrolls, exhaust and inlet filters and full overhaul kits for the common nXDS, XDS, IDP, ISP and DIS families. Send the pump model and serial number so the correct revision is supplied; some models changed scroll geometry mid-production.