Skip to main content

Independent. Diagnosis first, parts second.

+1 647-919-3041 [email protected]

Chromkit
Get a quote
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

Piston seals for Thermo UltiMate 3000 RS and SD pumps, 2 per pack

Replaces OEM part number: 6040.0304

Aftermarket piston seals for the Thermo UltiMate 3000 RS and SD pumps, ISO-3100SD, HPG-3200RS/SD, HPG-3400RS/SD, see the full fitment list above, cross-referenced to 6040.0304. As the seal wears, mobile phase leaks past the piston on the compression stroke, so pressure ripple rises and the baseline moves with it. If the plunger behind it is scored, change both, or the new seal fails early.

Type
Piston seals, reversed phase, 2/pk
Fits
Thermo UltiMate 3000 RS and SD pumps. ISO-3100SD, HPG-3200RS/SD, HPG-3400RS/SD, LPG-3400RS/SD, DGP-3600RS/SD
Replaces
6040.0304
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.

How buying works, written for procurement →

More for Thermo Scientific and similar systems