Pressure relief valve, location/task/design/function - GF47.31-P-3100A: Notes
ENGINE 112, 113 in MODEL 129 with CODE (494a) USA version
ENGINE 111, 112 in MODEL 170 up to 31.8.00 with CODE (494a) USA version
ENGINE 112, 113 in MODEL 210.2 with CODE (494a) USA version
ENGINE 112, 113 in MODEL 210.0 up to 31.5.01 with CODE (494a) USA version
ENGINE 112, 113, 137 in MODEL 220 up to 31.8.00 with CODE (494a) USA version
ENGINE 137, 113 in MODEL 215 up to 31.8.00 with CODE (494a) USA version
Pressure relief valve design
| Pressure relief valve location | Model 129 | GF47.31-P-3100-01A | |
| Model 170 | GF47.31-P-3100-01G | ||
| Model 210 | GF47.31-P-3100-01F | ||
| Model 215, 220 | GF47.31-P-3100-01M | ||
| Pressure relief valve task | Limiting the pressure in the ORVR vent line if fuel tank overfilled or if gasoline pump nozzle faulty (does not switch off). | ||
| Pressure relief valve design | Housing with internal diaphragm which seals off the line to the pressure relief valve by means of a spring. | ||
| Pressure relief valve function | The diaphragm lifts off at a pressure of approx. 60 to 90 mbar. The fuel overflow line to atmosphere opens. Air is admitted to the diaphragm chamber. |