Domestic gas heating system solenoid valve - has stem with different closure elements for different cases

摘要

The valve has one small closure element directly on the moving part of the solenoid valve. Another larger diameter closing element is held on the stem of the smaller closure element. This valve can be used for town gas or natal gas or butance and propane without adjustment or changing the components of the solenoid valve. The closure element (20) or larger diameter has two closing elements (25, 26) for high throughput rate. These are moved simultaneously and are held on two seats whose openings control two independent gas outlet channels each of which is used for a certain gas type. The axial stem (16) has a certain diameter to ensure a limited and accurate gas flow of small throughput rate.