G4 Plug Valve ASME 150
The G4 plug valve has been supplied for nearly 50 years to chemical plants, the valve has a large area locked in PTFE sleeve with a secondary reverse lip PFA diaphragm seal. The standard valve has a inline adjustable rocker arm to reseat the plug. For even higher emission control we can offer the Marathon G4 valve with additional O-ring seals around the stem or with even further stem sealing we offer the Durco TSG4 severe service valve with self adjusting Belleville washers providing a third sealing arrangement with a live loaded PTFE cup and cone seal pack. The G4 can be used in may applications with a carbon steel body but is also available in exotic metallics for use in highly corrosive applications.
Installation, Maintenance and General Guidance PDF
Dimensions to suit ASME 150 flange piping systems
| To suit pipework NB | Face – Face A | CL to end of wrench B |
CL to top of wrench C |
|
| Inches | mm | mm | mm | mm |
| 1/2″ | 15 | 108 | 152 | 121 |
| 3/4″ | 20 | 117 | 152 | 121 |
| 1″ | 25 | 127 | 178 | 122 |
| 1.1/2″ | 40 | 165 | 229 | 140 |
| 2″ | 50 | 178 | 305 | 160 |
| 3″ | 80 | 203 | 457 | 190 |
| 4″ | 100 | 229 | 762 | 229 |
| 6″ | 150 | 267 | G/O | G/O |
