A GAS VALVE AND A METHOD FOR DELIVERING A GAS PULSE

摘要

A gas valve comprising a valve body which is capable of butting against a valve seat so as to close the gas valve. The valve body comprises a membrane which is fixed in the valve housing at its outside edge, in such a manner that a control chamber is formed at the side remote from the valve seat, which control chamber is connected to the gas inlet via a throttle channel. At least part of the other side of the membrane is in communication with the gas inlet, and means are provided for allowing gas to escape from the control chamber so as to open the gas valve, in that the gas pressure from the gas inlet on said other side causes the valve body to move away from the valve seat. The valve body comprises a valve member which is centrally attached to the membrane and which is substantially positioned on said other side of the membrane, which valve member sealingly mates with the valve seat.