| 摘要 |
TITLE OF THE INVENTION: FUEL CONTROL DEVICE, FUEL CONTROL SYSTEM USING THE DEVICE AND METHOD OF MAKING THE DEVICE A fuel control device, system using the device and method of making the same are provided. The device comprises a housing having an inlet for being interconnected with a fuel source and an outlet for being interconnected to a main burner, the housing having a main valve seat between the inlet and the outlet and a thermostatically operated valve member for opening and closing the main valve seat, the housing having an annular heater pilot valve seat surrounding the main valve seat and being opened and closed by the thermostatically operated valve member at the same time that the thermostatically operated valve member is opening and closing the main valve seat, the housing having an annular auxiliary fuel supply valve seat surrounding the heater pilot valve seat and being adapted to be opened and closed by the thermostatically operated valve member at the same time that the thermostatically operated valve member is opening and closing the main valve seat and the heater pilot valve seat, the housing having passage for interconnecting the inlet to the auxiliary fuel supply valve seat independently of the main valve seat. |
