Mini-Check Valve Style - M1 - M8

Member of the Mini-Check Series

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Mini-Check Valve Style - M1 - M8

The Mini-Check is designed for minimum pressure drop. The three piece construction permits many combinations of end fittings, which makes the valve adaptable for nearly every application. The Mini-Check is available with 1/8, 1/4, and 3/8 inch pipe threads, both male and female. It can also be supplied with a 1/8, 1/4 or 3/8 inch tubing end on one side and with a pipe thread end on the other just by changing the end fitting. Combinations of male and female threads are also available. The Mini-Check can also be used as a low pressure relief valve or vacuum breaker by using the desired spring settings.

Many valves in this series can be supplied with B16.34 certification. Give us a call for more information.
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NOTES (DIMENSIONS TABLE)
*May be larger and/or round.

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View MCV Dimensions in PDF format

When ordering styles M5 through M8 be sure to specify whether compression (-C) or 37° flare (-F).

M1 - Male pipe threads both ends. M5 - Male pipe inlet - tubing outlet.
M2 - Female pipe threads both ends. M6 - Female pipe inlet - tubing outlet.
M3 - Male pipe inlet - female pipe outlet. M7 - Tubing inlet - male pipe outlet.
M4 - Female pipe inlet - male pipe outlet. M8 - Tubing inlet - female pipe outlet

 

Nominal Pipe & Tube Size Size Code A Hex Size B* C D E F G Orifice Diameter
1/8 A 2.16 7/8 0.75 0.71 0.93 0.11 0.73 0.348
1/4 B 2.16 7/8 0.92 0.84 1.23 0.57 0.97 0.348
3/8 C 2.48 1-1/8 0.92 0.91 1.32 0.59 1.00 0.464
  • 316 Stainless Steel (SS)
  • Brass (BR)
  • Carbon Steel (CS)
  • Body Material Non-Shock Pressure-Temperature Rating

    316 Stainless Steel (SS)
    Carbon Steel (CS)


    5000 psig @ 100°F

    Brass (BR) 3000 psig @ 100°F

    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
    1/8 1.1
    1/4 1.4
    3/8 3.2

    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 MATL
    1/8 M1A - M4A 6.2 oz.
    1/4 M1B - M8B 7.3 oz.
    3/8 M1C - M8C 11.8 oz.
    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.
    MCV 1/8" - 3/8" 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
    MCV 1/8" - 3/8" 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
    MCV 1/8" - 3/8" 316SS
    Brass
    AFLAS®
    Buna-N
    EPDM
    Kalrez®
    "Metal to Metal"
    Neoprene
    PTFE
    Viton® 
    1/8 PSI
    1/2 PSI
    1.5 PSI
    3.5 PSI
    316 SS
    MCV 1/8" - 3/8" 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
    MCV 1/8" - 3/8" 316SS
    Brass
    AFLAS®
    Buna-N
    EPDM
    Kalrez®
    "Metal to Metal"
    Neoprene
    PTFE
    Viton®
    1/8 PSI
    1/2 PSI
    1.5 PSI
    3.5 PSI
    316 SS

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