CAT : No.725-07E-C
Check Valves
VUCL SERIES
ADZS A.Z ABF (I) AE-ZD
ADZS A.Z ABF (I) AE-ZB
Features
Dimensions
Fixed Cracking Pressures
Dimensions, shown with
Lok tube fitting nuts finger-tight, are for reference only and are subject to change.
From 1/3 to 25 psi (0.03 to 1.8 bar) (Standard: 1 psig)
A
B (flat)
Technical Data
Check valves are designed for
directional flow control only.
Check valves should never be
used as code safety relief devices.
Temperature and Pressure Rating
End Connections: 7000
Lok, Rc1/4
100 ゜
F (37 ℃), 6000 psig (413 bar)
6000
Pressure (psig)
5000
4000
Pressure (psig)
250 ゜
F (121 ℃), 4910 psig (338 bar)
200 ゜
F (93 ℃),5160 psig (355 bar)
3000
300 ゜
F (148 ℃), 4660 psig (321 bar)
2000
400 ゜
F (204 ℃), 4280 psig (294bar)
1000
0
-50 -10 0
50
100
150
200
250
300
350
400
450
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
End Connections: Rc1/2
100 ゜
F (37 ℃), 5100 psig (351 bar)
200 ゜
F (93 ℃), 4411 psig (299 bar)
End Connections
300 ゜
F (148 ℃), 3978 psig (271 bar)
400 ゜
F (204 ℃), 3646 psig (251 bar)
-50 -10 0
50
Temperature (゜
F)
150
250
350
450
Temperature (゜
F)
Cracking and Reseal Pressures at 70 °
F (20 °
C)
Nominal Cracking
Pressure psig (bar)
Cracking Pressure Range
psig（bar）
1/3 (0.03)
1 (0.07)
5 (0.35)
10 (0.69)
25 (1.8)
Up to 3 (0.21)
Up to 4 (0.28)
3 to 9 (0.21 to 0.63)
7 to 15 (0.49 to 1.1)
20 to 30 (1.4 to 2.1)
※1
Reseal Pressure
psig（bar）
※2
6 (0.42) or more back pressure
5 (0.35) or more back pressure
2 (0.14) or more back pressure
3 (0.21) or less upstream pressure
17 (1.2) or less upstream pressure
※1: Upstream pressure at the start of first flow
The start of first flow means, by pressurizing from the upstream after putting the outlet pipe into water, the
continuous air bubble coming through the outlet.
※1: Cracking Pressure:
The inlet pressure at
which the first indication of
flow occurs(steady stream
of bubbles) .
※2: The pressure when the flow is not confirmed any more
【Nominal Cracking Pressure：0.003 to 0.035MPa】
Each reverse pressure according to the cracking pressure is necessary for sealing at a valve seat.
The reverse pressure is the pressure of deducting the upstream pressure from the outlet pressure. ※2: Reseal Pressure :
The pressure at which there
is no indication of flow.
【Nominal Cracking Pressure：0.069 to 0.18MPa】
When the upstream pressure is below the value shown on the table, a valve seat is resealed.
Applicable fluid
Rc
① Valve Series
Materials of Construction
② Body Material
Stainless Steel
1 3 4
7
5
6
2
8
9 10
No.
Description
1
2
3
4
5
6
7
8
9
10
BODY1
BODY2
POPPET
POPPET STOP
O-RING
BACKUP RING
SPRING
FRONT RING
BACK RING
NUT
※：Wetted parts
Materials
※
※
※
※
※
※
※
※
ASTM A479 316
ASTM A479 316
SUS 316L + FKM
ASTM A276 316
FKM
PTFE
SUS316
ASTM A276 316
ASTM A276 316
ASTM A276 316
Dimensions in.
(mm)
B
1/4 in.
（6.35）
2.43
(61.7)
11/16
(17.5)
3/8 in.
（9.52）
2.75
(69.9)
1/2 in.
（12.7）
2.96
(75.2)
6 mm
6000
(413)
2.43
(61.7)
Cracking
Pressure
psig (bar)
VUCL-941-6.35-0.07
VUCL-941-9.52-0.07
1
(25.4)
11/16
(17.5)
2.7
(68.6)
1
(25.4)
Ordering Numbers
VUCL-941-12.7-0.07
1
(0.07)
VUCL-941-6-0.07
VUCL-941-8-0.07
10 mm
2.8
(71.1)
12 mm
2.96
(75.2)
1/4 in.
2.28
(57.9)
11/16
(17.5)
VUCL-141B-0.07
3.29
(83.6)
1-1/16
(27)
VUCL-141D-0.07
1/2 in.
5100
(351)
VUCL-941-10-0.07
VUCL-941-12-0.07
Ordering Information
Attention and asking in selection
1. The pressure more than the reseal pressure is necessary for sealing of seat.
2. For valves not actuated for a period of time, initial cracking pressure may be higher than the set cracking pressure.
3. In general Check Valves are used for only direction control of flow. Please don't use check valves for ON - OFF values.
Working Pressure
psig
(bar)
A
8 mm
①② ③
Air, Nitrogen gas, Inert gas like Helium, and non - corrosive gas and liquid.
1
Lok
Nominal
Sizes
③ Valve Type
Check Valves
④⑤
⑥
⑦
⑥ Connection Sizes
6.35: Lok 6.35
9.52: Lok 9.52
12.7: Lok 12.7
⑤ Working Pressure
6: Lok 6
6000 psig (413 bar)
8: Lok 8
10: Lok 10
12: Lok 12
B: Rc1/4
D: Rc1/2
④ End Connections
1: Screwed Type
9:
Lok Type
⑦ Cracking Pressures
0.07: 1 psig (0.07 bar)
0.03: 1/3 psig (0.0 3bar)
0.35: 5 psig (0.35 bar)
0.69: 10 psig (0.69 bar)
1.8: 25 psig (1.8 bar)
2
Features
Dimensions
Fixed Cracking Pressures
Dimensions, shown with
Lok tube fitting nuts finger-tight, are for reference only and are subject to change.
From 1/3 to 25 psi (0.03 to 1.8 bar) (Standard: 1 psig)
A
B (flat)
Technical Data
Check valves are designed for
directional flow control only.
Check valves should never be
used as code safety relief devices.
Temperature and Pressure Rating
End Connections: 7000
Lok, Rc1/4
100 ゜
F (37 ℃), 6000 psig (413 bar)
6000
Pressure (psig)
5000
4000
Pressure (psig)
250 ゜
F (121 ℃), 4910 psig (338 bar)
200 ゜
F (93 ℃),5160 psig (355 bar)
3000
300 ゜
F (148 ℃), 4660 psig (321 bar)
2000
400 ゜
F (204 ℃), 4280 psig (294bar)
1000
0
-50 -10 0
50
100
150
200
250
300
350
400
450
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
End Connections: Rc1/2
100 ゜
F (37 ℃), 5100 psig (351 bar)
200 ゜
F (93 ℃), 4411 psig (299 bar)
End Connections
300 ゜
F (148 ℃), 3978 psig (271 bar)
400 ゜
F (204 ℃), 3646 psig (251 bar)
-50 -10 0
50
Temperature (゜
F)
150
250
350
450
Temperature (゜
F)
Cracking and Reseal Pressures at 70 °
F (20 °
C)
Nominal Cracking
Pressure psig (bar)
Cracking Pressure Range
psig（bar）
1/3 (0.03)
1 (0.07)
5 (0.35)
10 (0.69)
25 (1.8)
Up to 3 (0.21)
Up to 4 (0.28)
3 to 9 (0.21 to 0.63)
7 to 15 (0.49 to 1.1)
20 to 30 (1.4 to 2.1)
※1
Reseal Pressure
psig（bar）
※2
6 (0.42) or more back pressure
5 (0.35) or more back pressure
2 (0.14) or more back pressure
3 (0.21) or less upstream pressure
17 (1.2) or less upstream pressure
※1: Upstream pressure at the start of first flow
The start of first flow means, by pressurizing from the upstream after putting the outlet pipe into water, the
continuous air bubble coming through the outlet.
※1: Cracking Pressure:
The inlet pressure at
which the first indication of
flow occurs(steady stream
of bubbles) .
※2: The pressure when the flow is not confirmed any more
【Nominal Cracking Pressure：0.003 to 0.035MPa】
Each reverse pressure according to the cracking pressure is necessary for sealing at a valve seat.
The reverse pressure is the pressure of deducting the upstream pressure from the outlet pressure. ※2: Reseal Pressure :
The pressure at which there
is no indication of flow.
【Nominal Cracking Pressure：0.069 to 0.18MPa】
When the upstream pressure is below the value shown on the table, a valve seat is resealed.
Applicable fluid
Rc
① Valve Series
Materials of Construction
② Body Material
Stainless Steel
1 3 4
7
5
6
2
8
9 10
No.
Description
1
2
3
4
5
6
7
8
9
10
BODY1
BODY2
POPPET
POPPET STOP
O-RING
BACKUP RING
SPRING
FRONT RING
BACK RING
NUT
※：Wetted parts
Materials
※
※
※
※
※
※
※
※
ASTM A479 316
ASTM A479 316
SUS 316L + FKM
ASTM A276 316
FKM
PTFE
SUS316
ASTM A276 316
ASTM A276 316
ASTM A276 316
Dimensions in.
(mm)
B
1/4 in.
（6.35）
2.43
(61.7)
11/16
(17.5)
3/8 in.
（9.52）
2.75
(69.9)
1/2 in.
（12.7）
2.96
(75.2)
6 mm
6000
(413)
2.43
(61.7)
Cracking
Pressure
psig (bar)
VUCL-941-6.35-0.07
VUCL-941-9.52-0.07
1
(25.4)
11/16
(17.5)
2.7
(68.6)
1
(25.4)
Ordering Numbers
VUCL-941-12.7-0.07
1
(0.07)
VUCL-941-6-0.07
VUCL-941-8-0.07
10 mm
2.8
(71.1)
12 mm
2.96
(75.2)
1/4 in.
2.28
(57.9)
11/16
(17.5)
VUCL-141B-0.07
3.29
(83.6)
1-1/16
(27)
VUCL-141D-0.07
1/2 in.
5100
(351)
VUCL-941-10-0.07
VUCL-941-12-0.07
Ordering Information
Attention and asking in selection
1. The pressure more than the reseal pressure is necessary for sealing of seat.
2. For valves not actuated for a period of time, initial cracking pressure may be higher than the set cracking pressure.
3. In general Check Valves are used for only direction control of flow. Please don't use check valves for ON - OFF values.
Working Pressure
psig
(bar)
A
8 mm
①② ③
Air, Nitrogen gas, Inert gas like Helium, and non - corrosive gas and liquid.
1
Lok
Nominal
Sizes
③ Valve Type
Check Valves
④⑤
⑥
⑦
⑥ Connection Sizes
6.35: Lok 6.35
9.52: Lok 9.52
12.7: Lok 12.7
⑤ Working Pressure
6: Lok 6
6000 psig (413 bar)
8: Lok 8
10: Lok 10
12: Lok 12
B: Rc1/4
D: Rc1/2
④ End Connections
1: Screwed Type
9:
Lok Type
⑦ Cracking Pressures
0.07: 1 psig (0.07 bar)
0.03: 1/3 psig (0.0 3bar)
0.35: 5 psig (0.35 bar)
0.69: 10 psig (0.69 bar)
1.8: 25 psig (1.8 bar)
2