Inspection After Removal
- Place a string so that it is caught in the valve of the thermostat (or water control valve) and suspend it in boiling water. It must be fully immersed in the water.
- The valve opening temperature is the temperature at which the valve plate begins to rise from the top plate causing the thermostat to fall off of the string.
- Continue heating the water and thermostat to check valve lift (the full-open valve lift distance).NOTE: The valve lift standard temperature for the thermostat (or water control valve) is the reference value.
- After checking the valve lift, lower the water temperature and check the valve closing temperature.
Standard Values
STANDARD VALUES
| Component | Thermostat | Water control valve |
|---|---|---|
| Valve opening temperature | 80.5 - 83.5°C (177 - 182°F) | 93.5 - 96.5°C (200 - 206°F) |
| Valve lift | More than 8 mm/95°C (0.315 in/203°F) | More than 8 mm/108°C (0.315 in/226°F) |
| Valve closing temperature | 77°C(171°F) | 90°C(194°F) |