Hydraulic device ensuring the abrupt opening and closing of an inlet shutter for gas to a burner of an instantaneous gas bath heater or water heater

摘要

The invention relates to a mechanism with a membrane for controlling the admission of gas to an apparatus. On the outside of the water valve 1 there is arranged another small housing 24 comprising an additional shut-off element 31, 27 combined with a small differential membrane 25 which delimits two water chambers, an upper chamber 27 in communication via the conduit 28 with the upper chamber 4 of the water valve and a lower chamber 29 in communication via the conduit 26 with the lower chamber 5 of the water valve. Application to instantaneous gas bath heaters and water heaters. <IMAGE>