| 摘要 |
<p>PURPOSE: To ensure a heating output over a wide area, by permitting an opening of the leak valve of a pilot adjuster to follow an air stream passing through a conduit, and providing means for adding to a gas flow separating a pilot adjuster slight opposing pressure which serves as a function of pressure that is existent downstream a leak valve and which changes oppositely to the foregoing pressure. CONSTITUTION: When there is no air pressure at an inlet 11, a valve body 15 is pushed against a valve seat 16 owing to elongation of a spring 9 and a spring 31. A gas valve 3 is pushed against a valve seat 4 to permit no gas flow to be sent from an outlet 2 to a burner U. When an air stream A1 is applied to the inlet 11, the valve body 15 is separated from the valve seat 16, and an air stream A2 is fed out through an outlet 12. The spring 9 is compressed and a leak valve 8 is opened, whereby a gas stream effuses to the outside of a chamber B to reduce gas pressure in the chamber B and hence the gas valve 3 is opened to feed the gas flow G2 to the outlet 2. The more the gas flow A2 is increased, the more gas flow G2 is obtained. Pressure itself acting on the gas valve 32 is adjusted as a function of a gas leakage amount passing through the leak valve 8. As a result, force of a spring 35 adjustable with a caliburation screw 36 is applied on an upper end of a bar 4 axially.</p> |
