Waters

ASI Check Valves are a High Performance
Upgrade for Your Waters Pump

Replacement Check Valves

Self-priming With the ASI valve, priming is easy. Open the pump outlet and turn on the pump. Your pump will prime itself, even if the head and intake lines are completely dry. You won't need to use a syringe or draw-off valve to prime your pump.

Rugged Construction The valve will not crush, crack, or leak due to high pressure. We designed the ASI cartridge so that loads are transmitted through the valve casing rather than the seat, as in conventional designs.

Convenient and Economical Cartridge Design When it's time for routine maintenance, you only need to replace the cartridge, not the entire assembly. The ASI cartridge costs no more than most conventional valve rebuild kits, and you won't spend time chasing ruby balls all over the lab bench.

Pre-tested Every ASI valve is tested prior to shipping to ensure it passes a stringent set of performance specifications.

Click here for more information about ASI check valves.

Replacement Piston Seals and Pistons

ASI pump seals and pistons have been developed to reduce pump downtime. Our UHMW-PE piston seal material is compounded with other proprietary polymers to provide lower friction and better solvent resistance than pure UHMW-PE. It generally provides much longer service life than Teflon and generates less wear material, and we recommend it for most applications. Our Teflon piston seal has a proprietary additive to increase resistance to cold flow, and improve wear characteristics. Teflon is inert to any HPLC mobile phase.

Click here for a detailed guide to selecting the best material.

ASI Self-priming Check Valves

Waters 616 SS

Waters 625, 626 PEEK

Waters Alliance^® Model 2690/95, 2790/95/96

Waters M45, 45G, 510, 515, 590, 1515, 1525, 6000, 6000A, LCM1

Waters M501, 600, 600E, 610

Waters Extended Flow 225 µL Head #3
M510 EF, 590 EF, 6000 EF, 6000A EF, LCM1

Waters Extended Flow 225 µL Head #3
M600 EF, 600E EF, 610 EF, 650 EF

* Our standard ball & seat is sapphire & ruby. If you wish to specify ceramic ball & seat, add a "C" to end of part number.

ASI Replacement Piston Seals

Waters M45, 45G, 501, 510, 515, 590, 600, 600E, 610, 1515, 1525 (Analytical), 6000, 6000A, LCM1

Waters Extended Flow 225 mL Head #3
M510 EF, 590 EF, 600 EF, 600E EF, 610 EF, 650 EF, 6000 EF, 6000A EF, LCM1

Waters Alliance^® Model 2690/95, 2790/95/96

ASI Replacement Pistons

Waters M45, 45G, 501

Waters M510, 590, 600, 600E, 610, 6000, 6000A, LCM1

Waters 616, 625, 626

Waters Alliance^® Model 269X, 279X

Waters Extended Flow 225 µL Head #3
M510 EF, 590 EF, 600 EF, 600E EF, 610 EF, 650 EF, 6000 EF, 6000A EF, LCM1