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Check Valves

Midland Check Valves are carefully engineered to provide reliable, high flow rates (up to 37,000 lb/hour) in conjunction with high flow disturbance sensitivity to help operators achieve safe operation and faster unloading times.

Superior Midland product standards mean non-galling assemblies that keep valves sliding easily without binding. A solid steel retaining bar – a Midland exclusive – makes it impossible for the ball to drop out the bottom of a Midland Check Valve.

In operation, a very tight range of acceptable flow rates assures there are no inadvertent closures that can damage a loading system, causing component failure or disrupting operations. And, should the valve "check," you won’t need to resort to hitting the valve or using other potentially destructive methods to re-open the valve. A pressure bypass enables rapid reopening and continued operation after the cause of excess flow is corrected.

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Features & Benefits

  • Available for sample line, liquid lines and vapor line styles
  • Engineered to provide reliable, high flow rates in conjunction with high-flow disturbance sensitivity to help operators achieve safe operation and faster unloading times
  • Non-galling assemblies keep valves sliding easily without binding
  • Wide range of acceptable flow rates ensure that there are no inadvertent closures that can damage a loading system
  • Pressure bypass enables rapid reopening and continued operation after the cause of excess flow is corrected

Liquid Check Valves

Liquid Check Valves

Model #Valve Type Max Flow   Type  Material Mount TypeMount SizeAAR Approval #
A-119Liquid150 lbs water  Ball Float  Stainless Steel NPT - male1 1/4"E202121
A-119-WLiquid150 lbs water  Ball Float  Stainless Steel Weld1  11/16" diaE202121
A-120Liquid534 lbs water  Ball Float  Stainless Steel NPT - male1 1/4"E202122
A-126Liquid11,000 lbs liquid chlorine  Ball Float  Monel & Tungsten Carbide NPT - male1 1/4"E202105
A-127Liquid15,000 lbs liquid chlorine  Ball Float  Monel & Tungsten Carbide NPT - male1 1/4"E212115
A-129Liquid7,000 lbs liquid chlorine  Ball Float  Monel NPT - male1 1/4"E202133
A-136Liquid1,477 lbs propane  Cylinder Float  Mall Iron & Steel Weld2 7/8" diaE122004
A-164Liquid1,477 lbs propane  Cylinder Float  Steel Weld3.485" diaE122001
A-167Liquid1,477 lbs propane  Cylinder Float  Stainless Steel Weld3.485" diaE122001
A-180Vapor & Liquid20.3 Cv  Spring Loaded  Hastelloy & Monel Weld3.5" diaE202100
A-183Vapor & Liquid60.6 Cv  Spring Loaded  Hastelloy & Monel Weld4.136" diaE102011

Sample Check Valves

Model #Valve Type Type  Material Mount TypeMount SizeAAR Approval #
A-112Sample Ball Float  Stainless Steel NPT - female1/4"E112002
A-114Sample Ball Float  Stainless Steel NPT - female1/4"E112002
A-114-TSample Ball Float  Stainless Steel NPT - male & female3/4" & 1/4"E112002
A-116Sample Ball Float  Stainless Steel NPT - female1/4"E122010
A-116-3Sample Ball Float  Stainless Steel NPT - male3/8"E122010

Vapor Check Valves

Model #Valve Type Type  Material Mount TypeMount SizeAAR Approval #
A-128-BVapor Ball Float  Monel & Stainless Steel NPT - male1 1/4"E202132
A-144Vapor Cylinder Float  Mall Iron & Steel Weld2 7/8" diaE122004
A-144-PVapor Cylinder Float  Mall Iron & Steel Weld2 7/8" diaE122004
A-174-PVaporCylinder FloatSteelWeld3.5” diaE122001
A-177-PVaporCylinder FloatStainless SteelWeld3.5” diaE122001
A-180Vapor & Liquid Spring Loaded  Hastelloy & Monel Weld3.5" diaE202100
A-183Vapor & Liquid Spring Loaded  Hastelloy & Monel Weld4.136" diaE102011

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Contact Us for Technical Support on Your Projects and Resolving Any Technical Issues You Encounter

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