Gas governor

A gas governor, comprising,

• a casing having an inflow port and an outflow port, a primary pressure chamber communicating with the inflow port, a secondary pressure chamber communicating with the outflow port, and a valve seat between the primary pressure chamber and the secondary pressure chamber;
• a diaphragm facing to the primary pressure chamber at an opposite side to the valve seat;
• and
• a governor valve that has a valve body part which is inserted into a valve hole opened in the valve seat and of which a diameter is progressively enlarged toward an end part of a side of the secondary pressure chamber;
• wherein an axis part of the governor valve, which extends from the valve body part to a side of the diaphragm, is connected to the diaphragm and gas pressure fluctuation in the secondary pressure chamber is configured to be suppressed by displacing the governor valve through the diaphragm corresponding to gas pressure fluctuation in the primary pressure chamber,
• wherein:
• an auxiliary chamber divided by a separating wall from a main chamber that is a portion of the secondary pressure chamber, to which the valve seat faces, is provided in the secondary pressure chamber, the auxiliary chamber communicates with the main chamber through a communicating passage, the separating wall is positioned at a portion away in a circumferential direction from an outflow-port opened portion that is a peripheral wall portion of the secondary pressure chamber, in which the outflow port is opened, and the separating wall is provided so that a distance from the valve hole and a curvature in the circumferential direction of at least an end portion of the separating wall, which is close to the valve seat, are equal to those of an end portion of the outflow-port opened portion, which is close to the valve seat.