Connector Check Valve Style – CN, CR

Description

The Connector CN, CR) valve is a 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 CN valve is adaptable for use as a check valve, 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 valve is also available with ISO 7 “R” threads (CR).

Size & Dimension
Nominal Pipe Size Size Code A Hex Size B* C D Orifice Diameter
1/2 D 2.34 7/8 0.28 1/2 NPT 0.348
3/4 F 2.34 1-1/8 0.27 3/4 NPT 0.464
1 H 3.00 1-3/8 0.35 1 NPT 0.593
1-1/4 I 3.00 1-3/4 .033 1-1/4 NPT 0.890
1-1/2 J 3.19 2 0.32 1-1/2 NPT 1.135
2 K 3.68 2-1/2 N/A 2 NPT 1.385
2-1/2 L 5.00 3-1/4 N/A 2-1/2 NPT 1.555
3 M 5.50 4 N/A 3 NPT 2.025
4 N 5.00 4-1/2 N/A 4 NPT 2.560



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 Material Availability Non-Shock Pressure-Temperature Rating    
316 Stainless Steel (SS)
Carbon Steel (CS)
Brass (BR)
Standard 1/2" - 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
1/2 2.3
3/4 4.3
1 6.5
1-1/4 10.2
1-1/2 18.3
2 32.7
2-1/2 49.2
3 89.0
4 140

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
SIZE PART NUMBER ALL MATERIALS
1/2 CND 2.5 oz.
3/4 CNF 3.9 oz.
1 CNH 7.5 oz.
1-1/4 CNI 10.9 oz.
1-1/2 CNJ 1.5 lb.
2 CNK 2.7 lb.
2-1/2 CNL 5.0 lb.
3 CNM 8.9 lb.
4 CNN 11.1 lb.


Valve weights are approximate.

Seat & Cracking Pressure Options
Valve Style Size Range Body 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. Steel AFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
3.5 PSI
316 SS
CN 2" - 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
CN 2" - 4" C. Steel AFLAS®
Buna-N
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/8 PSI
1/2 PSI
1.5 PSI
316 SS
CN 1/2" - 4" Alloy 20
Alloy C-276
AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSI Alloy C-276
CN 1/2" - 4" Alloy 400 or MONEL® AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSI Alloy 400 or MONEL®
CN 1/2" - 4" Alloy B AFLAS®
Buna-N
EPDM
Kalrez®
"Metal to Metal"
Neoprene
PTFE
Viton®
1/2 PSI Alloy B