Owner's manual

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Series 19 Right-Angle Pilot Operated Check Valves
STANDARD SPECIFICATIONS: For valves on this page.
Ambient/Media Temperature: 15° to 160°F (-10° to 70°C).
Flow Media: Filtered air; 5 micron recommended.
Operating Pressure: 15 to 150 psig (1 to 10 bar).
Pilot Operated Check Valves
Pilot Operated Check Valves are used to block the return of air from cylinders or other devices.
Air flows freely from port 1 to port 2, but a signal at port 12 is required to allow flow in the
reverse direction from port 2 to port 1. Right-angle models with threaded Banjo are designed
for easy positioning of pipe or tubing.
Pilot port (12) thread is M5 for models
with G threads and 10-32 UNF for models
with NPTF threads. Manual override
models available - consult ROSS.
Threaded Banjo
Push-to-Connect Fitting
A
B
Signal
Port 12
Port 2
Port 1
A
B
Signal
Port 12
Port 2
Port 1
0 2 3 4 5 6 7 8
0
1
2
3
4
P
2 (bar)
G1/8 - 1/8 NPTF
P12 (bar)
0 2 3 4 5 6 7 8
0
1
2
3
4
P
2 (bar)
G1/4 - 1/4 NPTF
P12 (bar)
0 2 3 4 5 6 7 8
0
1
2
3
4
P
2 (bar)
G3/8 - 3/8 NPTF
P12 (bar)
0 2 3 4 5 6 7 8
0
1
2
3
4
P
2 (bar)
G1/2 - 1/2 NPTF
P
12
(bar)
Signal Pressure: The charts below show the minimum signal pressure (P12) to open the
valve versus port 2 pressure (P
2
) when there is no pressure at port 1 (P
1
= 0 bar).
IMPORTANT NOTE
Please read carefully and thoroughly
all of the CAUTIONS on the outside back cover.
Models with Threaded Banjo
Dimensions Tightening
Port Size Valve Model Avg. C
V
inches (mm) Torque Max.
Port 1* Port 2** Number 1 to 2
2 to 1 A B Ft-lb (Nm)
1/8 1/8 1958A1010 0.4 0.4 0.5 (13) 1.7 (41) 22.13 (30)
1/4 1/4 1958A2010 0.8 0.7 0.7 (17) 1.9 (48) 14.75 (20)
3/8 3/8 1958A3010 1.2 1.3 0.9 (22) 2.2 (55) 22.13 (30)
1/2 1/2 1958A4010 2.3 2.2 1.1 (27) 2.6 (66) 29.50 (40)
G1/8 G1/8 D1958A1010 0.4 0.4 0.5 (13) 1.7 (41) 7.38 (10)
G1/4 G1/4 D1958A2010 0.8 0.7 0.7 (17) 1.9 (48) 8.85 (12)
G3/8 G3/8 D1958A3010 1.2 1.3 0.9 (22) 2.2 (55) 14.75 (20)
G1/2 G1/2 D1958A4010 2.3 2.2 1.1 (27) 2.6 (66) 22.13 (30)
* Threads in port 1 are female.
** Port 2 threads are male.
Models with Push-to-Connect Fitting
Port Size
Dimensions Tightening
Port 1* Port 2** Valve Model Avg. C
V
inches (mm) Torque Max.
(tube size) (thread size) Number 1 to 2 2 to 1 A B Ft-lb (Nm)
5/32” 1/8
1958A1115
0.4 0.4 0.5 (13) 1.7 (41) 11.06 (15)
1/4” 1/8
1958A1120
0.4 0.4 0.5 (13) 1.7 (41) 11.06 (15)
1/4”
1/4
1958A2120
0.8 0.7 0.7 (17) 1.9 (48) 14.75 (20)
3/8”
1/4
1958A2130
0.8 0.7 0.7 (17) 1.9 (48) 14.75 (20)
3/8” 3/8 1958A3130
1.2 1.3 0.9 (22) 2.2 (55) 22.13 (30)
4 mm G1/8
D1958A1140 0.4 0.4 0.5 (13) 1.7 (41) 7.38 (10)
6 mm G1/8
D1958A1160 0.4 0.4 0.5 (13) 1.7 (41) 7.38 (10)
8 mm G1/8
D1958A1180 0.4 0.4 0.5 (13) 1.7 (41) 7.38 (10)
6 mm
G1/4 D1958A2160 0.8 0.7 0.7 (17) 1.9 (48)
8.85 (12)
8 mm
G1/4 D1958A2180 0.8 0.7 0.7 (17) 1.9 (48)
8.85 (12)
10 mm
G1/4 D1958A2110 0.8 0.7 0.7 (17) 1.9 (48)
8.85 (12)
8 mm
G3/8 D1958A3180 1.2 1.3 0.9 (22) 2.2 (55) 14.75 (20)
10 mm
G3/8 D1958A3110 1.2 1.3 0.9 (22) 2.2 (55) 14.75 (20)
# Port 1 tubing size in inches (”) or millimeters (mm).
** Port 2 threads are male.