Connector Check Valve Style – CN, CR

Description

The Connector (CN, CR) valve is a spring loaded check valve with a pipe nipple or connector housing. It is designed to be used in installations where a check valve with male pipe threads are required. The Connector check valve is adaptable for use as vacuum breaker, or low-pressure relief valve. Two valves used in combination make an excellent pressure vacuum vent. NPT threads are per ASME B1.20.1. This spring check valve is also available with ISO 7 “R” threads (CR) making it easily adaptable to any male threaded pipe connection.

Size & Dimension

Nominal Pipe SizeSize CodeAHex Size B*CDOrifice Diameter
1/2D2.347/80.281/2 NPT0.348
3/4F2.341-1/80.273/4 NPT0.464
1H3.001-3/80.351 NPT0.593
1-1/4I3.001-3/4.0331-1/4 NPT0.890
1-1/2J3.1920.321-1/2 NPT1.135
2K3.682-1/2N/A2 NPT1.385
2-1/2L5.003-1/4N/A2-1/2 NPT1.555
3M5.504N/A3 NPT2.025
4N5.004-1/2N/A4 NPT2.560

connector check valve
NOTES (DIMENSIONS TABLE)
*May be larger and/or round.

Available Materials

* 316 Stainless Steel (SS)* Alloy B (HB)
* Alloy 20 (A2)* Alloy C-276 (HC)
* Brass (BR)* Alloy 400 or MONEL® (MO)
* Carbon Steel (CS)* Titanium (TI)

Pressure Temperature Table

Body MaterialAvailabilityNon-Shock Pressure-Temperature Rating  
316 Stainless Steel (SS)
Carbon Steel (CS)
Brass (BR)
Standard1/2" - 3"
3000 psig @ 100°F
(1500 PSIG for o-ring seats)
4"
3000 psig @ 100°F
Alloy 20 (A2)
Alloy C-276 (HC)
Alloy 400 or MONEL®(MO)
Semi-standard
Alloy B (HB)
Titanium (TI)
Contact the factory for these or other materials.

Flow Data

PRESSURE DROP PSI

Size Cv
1/22.3
3/44.3
16.5
1-1/410.2
1-1/218.3
232.7
2-1/249.2
389.0
4140

FOR WATER AT 72°F

WATER FLOWRATE - GPM

Note: All flow curves and Cv values presume the valves are fully open with 1/2 PSI cracking pressure springs. Consult the factory for more information.

Valve Weights

SIZEPART NUMBERALL MATERIALS
1/2CND2.5 oz.
3/4CNF3.9 oz.
1CNH7.5 oz.
1-1/4CNI10.9 oz.
1-1/2CNJ1.5 lb.
2CNK2.7 lb.
2-1/2CNL5.0 lb.
3CNM8.9 lb.
4CNN11.1 lb.

Valve weights are approximate.

Seat & Cracking Pressure Options

Valve StyleSize RangeBody Materials
Other Options
Allowable Seat Materials
Other Options
Standard Cracking Pressures.
Other Options
More Info.
Standard Spring Material
More Info.
CN

1/2"- 1-1/2


316 SS
Brass
AFLAS®
EPDM
"Metal to Metal"
PTFE
Buna-N
Kalrez®
Neoprene
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
CN

1/2"- 1-1/2

C. SteelAFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
CN2" - 4"316SS
Brass
AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
CN2" - 4"C. SteelAFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
CN1/2" - 4" Alloy 20
Alloy C-276
AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSIAlloy C-276
CN1/2" - 4"Alloy 400 or MONEL®AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSIAlloy 400 or MONEL®
CN1/2" - 4"Alloy BAFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSIAlloy B

For additional information about Check Valves

What is a Silent Check Valve?
What is a Spring Loaded Check Valve?
What is a Poppet Check Valve?
What is an Inline Check Valves?

Content missing