| 摘要 |
There is disclosed a metering valve comprising a valve body having a metering cavity, a material inlet to said metering cavity and an outlet for metered material, and comprising an operating member reciprocable relative to the valve body comprising a plug closure for said outlet and having a material delivery action by which the contents of the metering cavity are delivered from the outlet, the outlet having a reduced cross section as compared to the metering cavity and the operating member being extendable out of the metering cavity away from the reduced cross section outlet to open the outlet to deliver the contents of the metering cavity. |
