Check Valves
Restek offersAnalytical Science Instruments
(ASI) check valves and piston seals for
Agilent andWatersmobile phase pumps.
ASI specializes inHPLC system compo-
nents, and parts that often exceed the original
equipment manufacturers' requirements.
ASI subjects each valve to a rigorous series
of tests. Each valve is tested for its self-prim-
ing capability, whichmeans youwon't need a
syringe or draw-off valves to prime your
pump. Simply open the pump outlet and start
the pump, the valvewill prime itself—even
if the transfer lines are completely dry! Next,
the valve goes through both a high-pressure
and a low-pressure test. The high-pressure test ensures that the valvewill not leak, even at pressures up to 12,000psi.
The low-pressure test verifies that the valve closes properly, evenwithout the presence of a high backpressure force.
The cartridge design allows easy replacement of worn or damaged valves.
Check Valves for Agilent 1050& 1100
Description
material
qty.
cat.#
Outlet check valve (cartridge and housing)
sapphire& ruby ball & seat
ea.
25170
Outlet check valve (cartridge and housing)
ceramic ball & seat
ea.
25173
Outlet cartridges
sapphire& ruby ball & seat
ea.
25171
Outlet cartridges
ceramic ball & seat
ea.
25174
Outlet housing
—
ea.
25172
Check Valves forWaters AllianceModel 2690
Description
material
qty.
cat.#
Outlet cartridges
sapphire& ruby ball & seat
ea.
25161
Outlet cartridges
ceramic ball & seat
ea.
25163
Inlet cartridges
sapphire& ruby ball & seat
ea.
25160
Inlet cartridges
ceramic ball & seat
ea.
25162
Check Valves forWaters 616 SS
Description
material
qty.
cat.#
Outlet check valve (cartridge and housing)
sapphire& ruby ball & seat
ea.
25167
Outlet check valve (cartridge and housing)
ceramic ball & seat
ea.
25179
Inlet check valve (cartridge and housing)
sapphire& ruby ball & seat
ea.
25164
Inlet check valve (cartridge and housing)
ceramic ball & seat
ea.
25177
Outlet cartridges
sapphire& ruby ball & seat
ea.
25168
Outlet cartridges
ceramic ball & seat
ea.
25180
Inlet cartridges
sapphire& ruby ball & seat
ea.
25165
Inlet cartridges
ceramic ball & seat
ea.
25178
Inlet housing
—
ea.
25166
Outlet housing
—
ea.
25169
At-a-Glance
Product
Information
fromRestek
HPLCAccessories
Flowrates ofWaters
™
Valves
Flowrates of ASI Valves
forWaters
™
Pumps
RunNumber
RunNumber
Figure 1:
Acheivemore consistant flow rateswith ASI valves.
