Mini-Check Valve Style – M1 – M8

Description

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.

Size & Dimension
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


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

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

Available Materials
  • 316 Stainless Steel (SS)
  • Brass (BR)
  • Carbon Steel (CS)
Pressure Temperature Table
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.

Flow Data

PRESSURE DROP PSI

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

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 MATL
1/8 M1A-M4A 6.2 oz.
1/4 M1B-M8B 7.3 oz.
3/8 M1C - M8C 11.8 oz.

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.
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
MVC 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