Model 143 MGM Back Pressure Check Valve
Application Overview
MGM Series 143 Back Pressure Check Valves are designed to allow flow in one direction only. They are made completely of carbon and stainless steel and are machined from bar stock with one weld in the body. The metal to metal seating allows slight leakage in the closed position.
The Model 143 MGM Back Pressure Check Valves are designed for installation in lines that flow into pressure tanks. They should be in inflowing lines when outward flow is never required. Model 143 MGM Back Pressure Check Valves can be mounted in any orientation. Each valve will have the proper flow direction indicated by an arrow stenciled in the body.
As with all MGM Back Pressure Check Valves, do not reduce outlet pipe size. Back Pressure Check Valves should be installed as close as possible to the container, with the stem pointed inwardly toward the container.
Valve Features
- Designed with male and female NPT threaded connections.
- Available in 1/2″ to 3″ NPT threads.
- Generous flow channels provide low pressure drops.
- Heavy duty all steel construction will withstand extremely tough conditions.
- Complete 304 or 316 stainless steel construction 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.
Materials
- Body – Carbon Steel
- Poppet – Stainless Steel
- Guide – Carbon Steel
- Spring – Stainless Steel
Sizes & Dimensions
| Series | Dimensions | ||||
| A | B-MNPT | C-FNPT | HEX | ||
| 143:FFDD 1x1x0.5×0.5 | 4.13 | 1 | .5 | 1.63 | |
| 143:GGDD 1.25×1.25×0.5×0.5 | 4.13 | 1.25 | .5 | 1.88 | |
| 143:GGEE 1.25×1.25×0.75×0.75 | 4.81 | 1.25 | .75 | 1.88 | |
| 143:HHEE 1.5×1.5×0.75×0.75 | 4.81 | 1.5 | .75 | 2.13 | |
| 143:HHFF 1.5×1.5x1x1 | 5.13 | 1.5 | 1 | 2.13 | |
| 143:IIFF 2x2x1x1 | 5.25 | 2 | 1 | 2.75 | |
| 143:IIGG 2x2x1.25×1.25 | 5.63 | 2 | 1.25 | 2.75 | |
| 143:KKFF 3x3x1x1 | 6.5 | 3 | 1 | 4 | |
| 143:KKGG 3x3x1.25×1.25 | 6.81 | 3 | 1.25 | 4 | |
| 143:KKHH 3x3x1.5×1.5 | 6.56 | 3 | 1.5 | 4 | |
| 143:KKII 3x3x2x2 | 6.56 | 3 | 2 | 4 | |
All Size Values are in Inches.