Metering valves for additives at risk of freezing
A metering valve and valve body technology, applied in the field of metering valves, to achieve the effect of ensuring safe positioning
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[0027] figure 1A metering valve 1 is shown with a valve housing 6 through which a channel 7 extends. The valve body 2 is arranged in the channel 7 . Valve body 2 is tensioned by spring 3 in metering valve 1 or in valve housing 6 or in channel 7 . To this end, the spring 3 is supported against the calibration body 4 . Calibration body 4 , spring 3 and valve body 2 are inserted into valve housing 6 via opening 11 of channel 7 . The calibrating body 4 is located in the channel section 8 of the channel 7 here. The spring 3 exerts a defined force on the valve body 2 which presses the valve body 2 against the closing seat 9 and thereby closes the metering valve 1 . The valve body 2 can be moved by a drive not shown against the spring force exerted by the spring 3, so that the valve body 2 moves away from the closing seat 9 and thereby opens the flow path 10 through the metering valve 1 from the inlet 21 to the outlet 22 and by This opens metering valve 1. The metering valve 1 ...
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