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Thermoplastic Valves Product Guide & Engineering Specifictions
Check Valves
Made in the U.S.A. Suitable for Oil-Free air handling to 25 psi, not for distribution of compressed air or gas Page 804
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Dimensions
Nominal
Size
A
Dimension Reference (inches, ± 1/16)
D
BC
Socket Threaded/SR Threaded Socket Threaded/SR Threaded Swing Spring
1/2 1-7/8 3-7/16 3-1/2 5-3/16 4-13/16 2-1/8 2-5/8
3/4 2-1/4 3-9/16 3-9/16 5-1/2 4-15/16 2-1/8 2-5/8
1 2-9/16 4-1/8 4-5/16 6-7/16 6 2-5/8 2-5/8
1-1/4 3-1/8 4-7/8 5-1/16 7-7/16 6-13/16 3-3/8 3-3/8
1-1/2 3-9/16 4-9/16 4-3/4 7-3/8 6-1/2 3-3/8 3-3/8
2 4-5/16 5-5/8 5-3/4 8-5/8 7-9/16 4-1/4 4-1/4
2-1/2 6-3/16 7-7/16 7-9/16 10-15/16 10-3/16 5-11/16 5-11/16
3 6-13/16 7-7/16 7-1/2 11-3/16 10-1/4 5-11/16 5-11/16
4 7-3/4 9-3/4 9-7/8 14-5/16 12-3/4 7-1/4 7-1/4
General Installation Information: True Union Swing Check valves are designed for horizontal instal-
lations, but may be installed in up-flow only vertical position. Check valves MUST be installed with the
valves FLOW arrow pointing in the direction of the flow. Do not install valve upside down. Flow velocity
should not exceed 5ft./sec. Minimum opening pressure less than 0.5 psi.
D
B
C
B
C
A
D
B
C
B
C
A
FLOW
True Union Utility Swing Check Valve
True Union Utility Spring Check Valve
Temperature Pressure Rating
System Operating
Temperature °F (°C)
100
(38)
110
(43)
120
(49)
130
(54)
140
(60)
150
(66)
160
(71)
170
(77)
180
(82)
190
(88)
200
(93)
210
(99)
Valve
Pressure
Rating psi
(MPa)
1/2" - 4" PVC
150
(1.03)
135
(.93)
110
(.76)
75
(.52)
50
(.34)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
-0-
(-0-)
150
(1.03)
140
(.97)
130
(.90)
120
(.83)
110
(.76)
100
(.70)
90
(.62)
80
(.55)
70
(.48)
60
(.41)
50
(.34)
-0-
(-0-)