150
Check Valves &Pressure Regulators
Nonmetallic 1/4-28 and10-32 InlineCheckValves
Low cracking pressure of 1 psi (0.07 bar)
Multiple confgurations for different applications
Excellent chemical resistance
Materials of construction: PEEK
™
and perfuoroelastomer
Upchurch Scientific
®
Nonmetallic Inline Check Valves provide
excellent backflow protection for sensitive equipment along with
outstanding chemical resistance guaranteed by the PEEK polymer and
perfuoroelastomer construction. Metal-free compositionmakes these
check valves perfect for use with corrosive fuids or biological samples.
These check valves function well up to moderately-high pressure
applications. Low internal volume also allows them to be used in areas
where fow path volume is important; however, higher fow rates can
pass through with minimal pressure drop.
Please Note: Upon initial use—or following a period of extended
inactivity—the cracking pressure for these check valves may be
somewhat higher than the stated cracking pressure.
Part No. Description
Cracking
Pressure Thru-Hole
nonmetallic 1/4-28 and 10-32 INLINE CHECK VALVES
CV-3320 Inlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F
*
1 psi (0.07 bar) 0.020” (0.50 mm)
CV-3321 Outlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F
*
1 psi (0.07 bar) 0.020” (0.50 mm)
CV-3322 Inlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F
*
1 psi (0.07 bar) 0.040” (1.0 mm)
CV-3323 Outlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F
*
1 psi (0.07 bar) 0.040” (1.0 mm)
CV-3324 Inlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F
*
1 psi (0.07 bar) 0.060” (1.60 mm)
CV-3325 Outlet Check Valve, 1/4-28 FB, M to 1/4-28 FB, F
*
1 psi (0.07 bar) 0.060” (1.60 mm)
CV-3330 Inlet/Outlet Check Valve, 1/4-28 FB, F to 1/4-28 FB, F
*
1 psi (0.07 bar) 0.020” (0.50 mm)
CV-3335 Inlet Check Valve, 1/4-28 FB, F to 10-32 C, M
*
1 psi (0.07 bar) 0.020” (0.50 mm)
CV-3336 Outlet Check Valve, 1/4-28 FB, F to 10-32 C, M
*
1 psi (0.07 bar) 0.020” (0.50 mm)
CV-3340 Inlet/Outlet Check Valve, 10-32 C, F to 10-32 C, F
*
1 psi (0.07 bar) 0.020” (0.50 mm)
* M = Male (external) threads; F = Female (internal) threads; C = Coned; FB = Flat-Bottom
Inline Check Valves
Swept
Volume
Max. Pressure
Rating
Back Pressure
Created
Cracking Pressure
Tolerance
CV-3320, CV-3321 37 µL 2,000 psi (138 bar) 30 psi (2.1 bar) ± 0.5 psi (0.03 bar)
CV-3330
34 µL 2,000 psi (138 bar) 30 psi (2.1 bar) ± 0.5 psi (0.03 bar)
CV-3335, CV-3336 49 µL 2,000 psi (138 bar) 30 psi (2.1 bar) ± 0.5 psi (0.03 bar)
CV-3340
34 µL 2,000 psi (138 bar) 30 psi (2.1 bar) ± 0.5 psi (0.03 bar)
CV-3322, CV-3323 49 µL 2,000 psi (138 bar) 30 psi (2.1 bar) ± 0.5 psi (0.03 bar)
CV-3324, CV-3325 182 µL 2,000 psi (138 bar) 30 psi (2.1 bar) ± 0.5 psi (0.03 bar)
Specifcations
Application Note
The CV-3320 or CV-3321 style can be connected to any 1/4-28 fat-bottom
port for trouble-free back fow protection.
When using a pump after the analytical column, consider placing
a CV-3330 Check Valve after the column to prevent fuid from the
post-column pump from fowing backwards through the column.
This product also serves as an excellent nonmetallic alternative to our
CV-3010 (page 151) in sparging applications where the mobile phase may
be corrosive to the stainless steel or ethylene propylene components
inside the CV-3010 assembly.
The CV-3335 Inlet and CV-3336 Outlet Check Valves allow tubing
larger than 1/16” OD (up to 1/8”) to be connected into a 10-32 coned
internal port. Use both of these check valves when attaching a larger-
volume sample loop to an analytical-scale injection valve. This setup
limits the fow of the sample into the loop to one direction, minimizing
back fow and sample carry-over.
The CV-3340 is useful in virtually any high pressure fuid pathway
using 1/16” or smaller OD tubing, where limiting the direction of
fow is desirable.
CV-3321, CV-3323, CV-3325
Nonmetallic, Outlet
1/4-28 FB Male to 1/4-28 FB Female
0.62”
(1.57 cm)
1.09”
(2.77 cm)
0.62”
(1.57 cm)
1.09”
(2.77 cm)
CV-3320, CV-3322, CV-3324
Nonmetallic, Inlet
1/4-28 FB Male to 1/4-28 FB Female
0.62”
(1.57 cm)
0.99”
(2.51 cm)
CV-3330
Nonmetallic, Inline
1/4-28 FB Female to 1/4-28 FB Female
0.62”
(1.57 cm)
1.17”
(2.97 cm)
CV-3335
Nonmetallic, Inlet
1/4-28 FB Female to 10-32 C Male
0.62”
(1.57 cm)
1.17”
(2.97 cm)
CV-3336
Nonmetallic, Outlet
1/4-28 FB Female to 10-32 C Male
0.99”
(2.51 cm)
CV-3340
Nonmetallic, Inline
10-32 C Female to 10-32 C Female
0.62”
(1.57 cm)
Top Seller
See starred products
FOR ORDERING & DISTRIBUTOR INFORMATION +1 800 426 0191 • +1 360 679 2528 • www.idex-hs.com