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189 Excess Flow Check Valve
189 Excess Flow Check Valve
189 Excess Flow Check Valve Cross Section
Picture of Model 189

MGM Model 189 Series Flanged Excess Flow Check Valves


  • Designed to fit between 150 or 300 pound American Standard steel pipe flanges. Ring Groove flanges can be furnished if required.
  • A350 LF2 forged carbon steel flanges
  • Generous flow channels provide low pressure drops.
  • Heavy duty steel construction will withstand temperatures from -50° F (-45° C) to +300° F (+148° C) and internal pressures up to 1900 psig (131 barg).
  • Complete 304 or 316 stainless steel construction is available for use in corrosive or extreme environments.
  • UNDERWRITERS LABORATORIES INC. listed for propane, butane, and anhydrous ammonia.
  • CRN # OC13500.5C
  • Other valve sizes may be available. Contact MGM for alternate sizes.

Canadian Registration Number: OC13500.5C
Series Pipe Size A B C D Flow Rating
189:I 2" 4.50 6.50 3.63 0.88 Click Here
189:K 3" 5.25 8.25 5.00 1.13 Click Here
189:M 4" 6.00 10.00 6.19 1.25 Click Here
189:P 6" 8.63 12.50 8.50 1.44 Click Here
189:Q 8" 10.00 15.00 10.63 1.63 Click Here
189:R 10" 13.13 17.50 12.75 1.88 Click Here
189:S 12" 13.13 20.50 15.00 2.00 Click Here
All Size Values are in Inches.
Carbon Steel 316 Stainless
Body Low-temp Carbon 316-SS
Guide Low-temp Carbon 316-SS
Spring --- 316-SS or 302-SS ---
Poppet(incl. nut and cotter pin) --- 316--SS ---

*Alternative materials available at additional cost

MGM Model 189 Excess Flow Check Valves are designed for use where flanged connections are required. They are made completely of carbon and stainless steel.

Model 189 Excess Flow Check Valves are double flanged and are equipped with either 150# or 300# raised face, forged flanges. Standard gaskets should be used on each end.

Model 189 MGM Excess Flow Check Valves can be installed in any orientation with negligible effect on flow rate. Each valve will have the proper closing flow direction indicated by an arrow stamped into the body. As with all MGM excess flow check valves, the Model 189 is equipped with an orifice in the check mechanism to allow for pressure equalization and will reopen automatically after the repairs are made.