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.
| Model # | Valve Type | Max Flow | Type | Material | Mount Type | Mount Size | AAR Approval # | |
| A-119 | Liquid | 150 | lbs water | Ball Float | Stainless Steel | NPT - male | 1 1/4" | E202121 |
| A-119-W | Liquid | 150 | lbs water | Ball Float | Stainless Steel | Weld | 1 11/16" dia | E202121 |
| A-120 | Liquid | 534 | lbs water | Ball Float | Stainless Steel | NPT - male | 1 1/4" | E202122 |
| A-126 | Liquid | 11,000 | lbs liquid chlorine | Ball Float | Monel & Tungsten Carbide | NPT - male | 1 1/4" | E202105 |
| A-127 | Liquid | 15,000 | lbs liquid chlorine | Ball Float | Monel & Tungsten Carbide | NPT - male | 1 1/4" | E212115 |
| A-129 | Liquid | 7,000 | lbs liquid chlorine | Ball Float | Monel | NPT - male | 1 1/4" | E202133 |
| A-136 | Liquid | 1,477 | lbs propane | Cylinder Float | Mall Iron & Steel | Weld | 2 7/8" dia | E122004 |
| A-164 | Liquid | 1,477 | lbs propane | Cylinder Float | Steel | Weld | 3.485" dia | E122001 |
| A-167 | Liquid | 1,477 | lbs propane | Cylinder Float | Stainless Steel | Weld | 3.485" dia | E122001 |
| A-180 | Vapor & Liquid | 20.3 | Cv | Spring Loaded | Hastelloy & Monel | Weld | 3.5" dia | E202100 |
| A-183 | Vapor & Liquid | 60.6 | Cv | Spring Loaded | Hastelloy & Monel | Weld | 4.136" dia | E102011 |
| Model # | Valve Type | Type | Material | Mount Type | Mount Size | AAR Approval # |
| A-112 | Sample | Ball Float | Stainless Steel | NPT - female | 1/4" | E112002 |
| A-114 | Sample | Ball Float | Stainless Steel | NPT - female | 1/4" | E112002 |
| A-114-T | Sample | Ball Float | Stainless Steel | NPT - male & female | 3/4" & 1/4" | E112002 |
| A-116 | Sample | Ball Float | Stainless Steel | NPT - female | 1/4" | E122010 |
| A-116-3 | Sample | Ball Float | Stainless Steel | NPT - male | 3/8" | E122010 |
| Model # | Valve Type | Type | Material | Mount Type | Mount Size | AAR Approval # |
| A-128-B | Vapor | Ball Float | Monel & Stainless Steel | NPT - male | 1 1/4" | E202132 |
| A-144 | Vapor | Cylinder Float | Mall Iron & Steel | Weld | 2 7/8" dia | E122004 |
| A-144-P | Vapor | Cylinder Float | Mall Iron & Steel | Weld | 2 7/8" dia | E122004 |
| A-174-P | Vapor | Cylinder Float | Steel | Weld | 3.5” dia | E122001 |
| A-177-P | Vapor | Cylinder Float | Stainless Steel | Weld | 3.5” dia | E122001 |
| A-180 | Vapor & Liquid | Spring Loaded | Hastelloy & Monel | Weld | 3.5" dia | E202100 |
| A-183 | Vapor & Liquid | Spring Loaded | Hastelloy & Monel | Weld | 4.136" dia | E102011 |
| Model # | Valve Type | Max Flow | Type | Material | Mount Type | Mount Size | AAR Approval # | |
| A-119 | Liquid | 150 | lbs water | Ball Float | Stainless Steel | NPT - male | 1 1/4" | E202121 |
| A-119-W | Liquid | 150 | lbs water | Ball Float | Stainless Steel | Weld | 1 11/16" dia | E202121 |
| A-120 | Liquid | 534 | lbs water | Ball Float | Stainless Steel | NPT - male | 1 1/4" | E202122 |
| A-126 | Liquid | 11,000 | lbs liquid chlorine | Ball Float | Monel & Tungsten Carbide | NPT - male | 1 1/4" | E202105 |
| A-127 | Liquid | 15,000 | lbs liquid chlorine | Ball Float | Monel & Tungsten Carbide | NPT - male | 1 1/4" | E212115 |
| A-129 | Liquid | 7,000 | lbs liquid chlorine | Ball Float | Monel | NPT - male | 1 1/4" | E202133 |
| A-136 | Liquid | 1,477 | lbs propane | Cylinder Float | Mall Iron & Steel | Weld | 2 7/8" dia | E122004 |
| A-164 | Liquid | 1,477 | lbs propane | Cylinder Float | Steel | Weld | 3.485" dia | E122001 |
| A-167 | Liquid | 1,477 | lbs propane | Cylinder Float | Stainless Steel | Weld | 3.485" dia | E122001 |
| A-180 | Vapor & Liquid | 20.3 | Cv | Spring Loaded | Hastelloy & Monel | Weld | 3.5" dia | E202100 |
| A-183 | Vapor & Liquid | 60.6 | Cv | Spring Loaded | Hastelloy & Monel | Weld | 4.136" dia | E102011 |
| Model # | Valve Type | Type | Material | Mount Type | Mount Size | AAR Approval # |
| A-112 | Sample | Ball Float | Stainless Steel | NPT - female | 1/4" | E112002 |
| A-114 | Sample | Ball Float | Stainless Steel | NPT - female | 1/4" | E112002 |
| A-114-T | Sample | Ball Float | Stainless Steel | NPT - male & female | 3/4" & 1/4" | E112002 |
| A-116 | Sample | Ball Float | Stainless Steel | NPT - female | 1/4" | E122010 |
| A-116-3 | Sample | Ball Float | Stainless Steel | NPT - male | 3/8" | E122010 |
| Model # | Valve Type | Type | Material | Mount Type | Mount Size | AAR Approval # |
| A-128-B | Vapor | Ball Float | Monel & Stainless Steel | NPT - male | 1 1/4" | E202132 |
| A-144 | Vapor | Cylinder Float | Mall Iron & Steel | Weld | 2 7/8" dia | E122004 |
| A-144-P | Vapor | Cylinder Float | Mall Iron & Steel | Weld | 2 7/8" dia | E122004 |
| A-174-P | Vapor | Cylinder Float | Steel | Weld | 3.5” dia | E122001 |
| A-177-P | Vapor | Cylinder Float | Stainless Steel | Weld | 3.5” dia | E122001 |
| A-180 | Vapor & Liquid | Spring Loaded | Hastelloy & Monel | Weld | 3.5" dia | E202100 |
| A-183 | Vapor & Liquid | Spring Loaded | Hastelloy & Monel | Weld | 4.136" dia | E102011 |
Reach Out to Our Customer Support Team for Prompt Assistance and Answers to Any Questions or Concerns You May Have
Contact Us for Technical Support on Your Projects and Resolving Any Technical Issues You Encounter
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Reach Out to Our Customer Support Team for Prompt Assistance and Answers to Any Questions or Concerns You May Have
Contact Us for Technical Support on Your Projects and Resolving Any Technical Issues You Encounter