Hemco Industries

Model 200 MGM Excess Flow Check Valve

Application Overview

The 200 Series Excess Flow Check Valves are designed for use where flanged connections are required. They are made completely of carbon and/or stainless steel not castings for added durability.

The Model 200 MGM 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 200 MGM Excess Flow Check Valves can be installed in any orientation with negligible effect on flow rate. Each valve has the proper flow direction indicated by an arrow stamped into the body.

As with all MGM excess flow check valves, the Series 200 is equipped with an orifice in the check mechanism to allow for pressure equalization and will reopen automatically after repairs are made.

Valve Features

  • 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 all steel construction will withstand extremely rough conditions.
  • 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 Hemco for alternate sizes.


  • Body Flange – A350LF2 Carbon Steel
  • Body Tube – A333 Carbon Steel
  • Poppet – Stainless Steel
  • Guide – Carbon Steel
  • Nut – Stainless Steel
  • Spring – Stainless Steel

Sizes & Dimensions

Flanged EndsLow RangeHigh Range
2” 300#RF ASA230L-606,000S-60230H-1212,000S-12