Connector Valve Style - CN

Member of the Housed Series

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Connector Valve (CN)

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).

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

View CN Dimensions in PDF format

Nominal 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
  • 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)
  • 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 @ 100F
    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.

    Seat material and spring material selection may limit the recommended service temperature.
    See seat ratings, spring ratings, and body material ratings for their respective recommended service temperatures.
    Consult the factory for reduced P-T rating above 100 °F. Standard spring material is 316 Stainless Steel.

    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

    P
    R
    E
    S
    S
    U
    R
    E

    D
    R
    O
    P

    P
    S
    I

    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.

    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.
    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

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