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Shimadzu

ASI Check Valves are a High Performance Upgrade for Your Shimadzu 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

Shimadzu LC-600, LC-9A, LC-10AD

Description OEM Part Number ASI Part Number
Inlet Check Valve
(Cartridge & Housing)
228-18522-91 250-1480*
Inlet Cartridge   250-1460*
Inlet Housing   250-1470
Outlet Check Valve
(Cartridge & Housing)
228-18522-92 250-1485*
Outlet Cartridge   250-1465*
Outlet Housing   250-1475

Shimadzu LC-6A, LC-10AS

Description OEM Part Number ASI Part Number
Inlet Check Valve
(Cartridge & Housing)
228-12353-91 250-1482*
Inlet Cartridge   250-1462*
Inlet Housing   250-1472
Outlet Check Valve
(Cartridge & Housing)
228-09054-93 250-1487*
Outlet Cartridge   250-1467*
Outlet Housing   250-1477

Shimadzu LC-10ADVP

Description OEM Part Number ASI Part Number
Inlet Check Valve
(Cartridge & Housing)
228-39093-92 250-1481*
Inlet Cartridge   250-1461*
Inlet Housing   250-1471
Outlet Check Valve
(Cartridge & Housing)
228-34976-91 250-1486*
Outlet Cartridge   250-1466*
Outlet Housing   250-1476

Shimadzu LC-10AT

Description OEM Part Number ASI Part Number
Inlet Check Valve
(Cartridge & Housing)
228-32166-91 250-1484*
Inlet Cartridge   250-1464*
Inlet Housing   250-1474
Outlet Check Valve
(Cartridge & Housing)
228-32531-92 250-1489*
Outlet Cartridge   250-1469*
Outlet Housing   250-1479

Shimadzu LC-10ATVP

Description OEM Part Number ASI Part Number
Inlet Check Valve
(Cartridge & Housing)
228-32166-91 250-1483*
Inlet Cartridge   250-1463*
Inlet Housing   250-1473
Outlet Check Valve
(Cartridge & Housing)
228-34976-91 250-1488*
Outlet Cartridge   250-1468*
Outlet Housing   250-1478

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

ASI Replacement Piston Seals

Shimadzu LC-600, LC-9A, LC-10AD, LC-10ADvp, LC-20AD

Description OEM Part Number ASI Part Number Material
Piston Seal 228-18745-00 & 228-35146-00 200-1420 Teflon
Piston Seal 10/Pack   200-1425 Teflon

Shimadzu LC-6A

Description OEM Part Number ASI Part Number Material
Piston Seal 228-11999-00 200-1440 Teflon
Piston Seal 10/Pack   200-1445 Teflon
Piston Seal Insertion Tool   200-1441  

Shimadzu LC-7A, LC-10AS, LC-10AT, LC-10ATvp, LC-2010

Description OEM Part Number ASI Part Number Material
Piston Seal 228-21975-91 200-1430 UHMW-PE
Piston Seal 10/Pack   200-1435 UHMW-PE
Piston Seal 228-35145-00 200-1432 Teflon
Piston Seal 10/Pack   200-1437 Teflon
Piston Wash Seal 228-28399-00 200-1431 UHMW-PE
Piston Wash Seal 10/Pack   200-1436 UHMW-PE

ASI Replacement Pistons

Shimadzu LC-600, LC-9A, LC-10AD

Description OEM Part Number ASI Part Number Material
Piston 228-18523-91 200-1320 Sapphire Rod

Shimadzu LC-6A

Description OEM Part Number ASI Part Number Material
Piston 228-12904-93 200-1310 Sapphire Rod

Shimadzu LC-7A, LC-10AS

Description OEM Part Number ASI Part Number Material
Piston 228-17019-93 200-1305 Sapphire Rod

Shimadzu LC-10ATvp, LC-2010

Description OEM Part Number ASI Part Number Material
Piston 228-35009-92 200-1302 Sapphire Rod

Shimadzu LC-10ADvp, LC-20AD

Description OEM Part Number ASI Part Number Material
Piston Piston only 228-35601-91 260-1303 Sapphire Rod

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