27 / 55
346
www.restek.comLC ACCESSORIES
Valves & Backpressure Regulators
Valves for HPLC
Our valves have low internal volumes and are rated to 15,000 psi
(103,421 kPa). They feature a two-piece stem assembly in which
the rotating upper shank is coupled through a ball joint to a
static lower stem. Only finger-tight torque is required to make
the seal.
Backpressure regulators can improve detector performance by
preventing bubble formation in the detector flow cell. They also
are useful in post-column reaction lines and between detec-
tors and fraction collectors in preparatory work. Regulators are
superior to more specific alternative solutions, like small-bore
tubing, in which pressure varies with flow rate.
Our end-of-line and flow-through backpressure regulators are
adjustable to ensure constant backpressure over a wide range of
mobile phase viscosities and flow rates. The end-of-line model is
available with 1/4-28 plastic flange-type fittings or high-pressure
1
/
16
"
compression fittings; this design adjusts from 15 to 60 psi
(103 to 414 kPa). The flow-through design has
1
/
16
"
compression
fittings and is adjustable from 7 to 75 psi (48 to 517 kPa).
26400
26401
26402
26403
26404
26406
26407
25017
25018
25020
Backpressure Regulators
Description
qty.
cat.#
price
Through Valve for HPLC,
1
/
16
" Fittings, 1/4-28, Stainless Steel,
Includes Nuts and Ferrules
ea.
26400
Angle Valve for HPLC,
1
/
16
" Fittings, 1/4-28, Stainless Steel,
Includes Nuts and Ferrules
ea.
26401
Bottom Vent Valve for HPLC,
1
/
16
" Fittings,
1/4-28, Stainless Steel, Includes Nuts and Ferrules
ea.
26402
Side Vent Valve for HPLC,
1
/
16
" Fittings,
1/4-28, Stainless Steel, Includes Nuts and Ferrules
ea.
26403
Dual-Stem Three-Way Valve for HPLC,
1
/
16
" Fittings,
1/4-28, Stainless Steel, Includes Nuts and Ferrules
ea.
26404
Prime/Purge Valve for HPLC, 1/4-28 Flanged Seat,
Stainless Steel, with Tubing and Fittings
ea.
26406
Prime/Purge Valve Repair Kit for Prime/Purge Valve
(includes: soft seal (2), PTFE O-ring (2), 7/32 hex key)
kit
26407
Description
qty.
cat.#
price
Backpressure Regulator:
end-of-line,
1
/
16
" OD tubing, flanged
ea.
25017
Backpressure Regulator: end-of-line, high-pressure seat
ea.
25018
Backpressure Regulator: flow-through, 5 µL internal volume
ea.
25020
also
available
Dampeners.
See
page 342 .