41
Connectors
Low Pressure Unions
BulkheadUnions
Designed for plumbing tubing through equipment housing
For use with standard 10-32 coned, 1/4-28 or M6 fat-bottom
threaded fttings
Thread Upchurch Scientifc
®
PEEK
™
Bulkhead Unions directly through
your equipment housing to connect internal tubing to the outside.
Each union has unique 3/8-24 external threads and comes complete
with a stainless steel nut and lock washer to hold it in place. Requires
a 3/8” hole tomount. The recommended torque limit for these unions
is 15 in.– lbs (1.7 N·m).
ElbowConnectors
Use these Elbow Connectors to easily navigate tight corners. One
Elbow is designed for use with 1/16” OD tubing and has a 0.020”
(0.50 mm) thru-hole. Use 1/8” OD tubing with the other Elbow, which
has a 0.062” (1.60mm) thru-hole. Both come completewith 1/4-28 PEEK
nuts and ETFE ferrules, and are pressure rated to 1,000 psi (69 bar).
P-430
PEEK Elbow
comes with Flangeless Fittings
1/4-28 threads
0.38”
(0.97cm)
0.67”
(1.70 cm)
P-430
P-442
P-441
Part No. Description
Threads
Color
Includes
Thru-hole
Swept Volume
BULKHEAD UNIONS
P-440
PEEK Bulkhead Union
10-32 Coned
Natural
(1) SST Nut/Washer
0.020” (0.50 mm)
1.9 µL
P-441
PEEK Bulkhead Union
1/4-28 Flat-Bottom Red
(1) SST Nut/Washer
0.040” (1.00 mm)
2.9 µL
P-441N
PEEK Bulkhead Union
1/4-28 Flat-Bottom Natural
(1) SST Nut/Washer
0.040” (1.00 mm)
2.9 µL
P-442
PEEK Bulkhead Union
M6 Flat-Bottom
Black
(1) SST Nut/Washer
0.040” (1.00 mm)
2.9 µL
ELBOW CONNECTORS
P-430
PEEK Elbow for 1/16” OD Tubing
1/4-28 Flat-Bottom Natural
(2) XP-235
0.020” (0.50 mm)
1.4 µL
P-432
PEEK Elbow for 1/8” OD Tubing
1/4-28 Flat-Bottom Natural
(2) XP-335
0.062” (1.60 mm)
13.6 µL
LARGE BORE UNIONS
P-134
PEEK True ZDV Union
5/16-24 Flat-Bottom Natural
N/A
N/A
N/A
U-658
PEEK Union for 1/4” OD Tubing
1/2-20 Flat-Bottom Black
N/A
0.188” (4.80 mm)
57 µL
U-664
PEEK Union for 5/16” OD Tubing
1/2-20 Flat-Bottom Black
N/A
0.188” (4.80 mm)
57 µL
P-441
1/4-28 internal threads
0.59”
(1.50 cm)
0.84”
(2.13 cm)
0.59”
(1.50 cm)
0.84”
(2.13 cm)
P-442
M6 internal threads
Bulkhead Union
includes stainless steel nut/lock washer
P-440
10-32 internal threads
0.59”
(1.50 cm)
0.84”
(2.13 cm)
Stainless Steel Bulkhead Unions are also available. Please contact us
for more information.
To use Elbows in higher pressure applications, simply replace the
provided fttings with Super Flangeless
™
Nuts and Ferrules, found on
pages 21 – 23.
Related Products
P-134
PEEK ZDV Union
0.44”
(1.12 cm)
0.68”
(1.73 cm)
1.23”
(3.12 cm)
0.78”
(1.98 cm)
U-658 &
U-664
PEEK Unions
with Flangeless Fittings
5/16-24
1/2-20
1/2-20
LargeBoreUnions
5/16-24 and 1/2-20 fat-bottom threads
Use any of the 5/16-24 fttings on page 56 and the appropriate ferrule
to create a true zero dead volume (ZDV) connection with the P-134
Union. Our U-658 and U-664 Unions are designed to be used with our
standard 1/2-20 fat-bottom threaded nuts and ferrules (included with
the U-658 and U-664 assemblies).
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