One way fluid valve

摘要

The non-return barrier is loaded by closing force and is only released with an initial operation of the valve by the fluid flowing through the valve with a time-delay relative to the first fluid take-up. An insert part or ring (6) which can be released by the fluid and keeps the flow cross-section free prevents the closing of the non-return lock. The insert part can be made from paraffin or naphthalin which dissolves with a certain operating temperature. The non-return lock can be a valve plate (2) pressed by closing force on the valve seat (5) and prevented from tight closing by the insert part.