Patent ID: 7690622

Claim:
A diaphragm-type electromagnetic valve with closing-force strengthening mechanism comprising: a diaphragm valve portion including a supply port and an output port for use in a main fluid opening to an attaching surface, a main valve seat positioned in a half way of a main flow path connecting both of the ports, a main diaphragm for opening and closing the main flow path while being in contact with or separating from the main valve seat, and a main pilot pressure chamber generating operating force in a direction for the main diaphragm to be in contact with the main valve seat, in a housing having the attaching surface for attaching the housing to a manifold base, and a solenoid-operated type pilot valve portion for supplying and discharging a pilot fluid to the main pilot pressure chamber, wherein the diaphragm valve portion further includes an auxiliary valve body for strengthening valve-closing force of the main diaphragm, an auxiliary pilot pressure chamber for applying the pilot fluid from the pilot valve portion to the auxiliary valve body, and a transmitting rod for transmitting operating force of the auxiliary valve body to the main diaphragm by displacing in junction with the auxiliary valve body.