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Independent. Diagnosis first, parts second.

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Illustration of a plunger rod and pump seal. Generic drawing, not a photograph of this part. Illustration

This is an aftermarket part, not an original manufacturer part. Instrument names and part numbers identify what it fits and replaces; they remain the trademarks of their owners. The manufacturer, country of origin, rated life and warranty are stated in the quote, before you decide anything. If you need the OEM part, say so and I will quote that instead.

Pump and injector spares

Check valve cartridge for Thermo UltiMate 3000 pumps

Replaces OEM part number: 6041.2301

Aftermarket check valve cartridge for the Thermo UltiMate 3000 series, DGP-3600BM/RS/SD, HPG-3200RS/SD, HPG-3400RS/SD, see the full fitment list above, cross-referenced to 6041.2301. A valve that is not seating shows up as pressure that swings with the pump stroke. Clean it before replacing it, because a trapped particle gives the same symptom as a worn seat.

Type
Check valve cartridge
Fits
Thermo UltiMate 3000 series. DGP-3600BM/RS/SD, HPG-3200RS/SD, HPG-3400RS/SD, ISO-3100BM/SD, LPG-3400BM/RS/SD, NCS-3500RS, NCP-3200RS, VF-P20
Replaces
6041.2301
Condition
new
Price
Quoted per order, in Canadian dollars

Before you order: if the instrument is misbehaving, tell me the symptom, not the part number. Lamps and seals get replaced for problems they did not cause. The first look costs nothing, and if this part is not the fix, I will say so.

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