Bellows-type pump and metering system

摘要: A system for the metered pumping and dispensing of fluid includes a filter pumped pump connected to filter. The is displacement type which tubular, longitudinally-contractable bellows receive pumping, fluid-activated reciprocating means expand contract bellows, selectively introduce working means. rigid fluid-tight chamber formed surround are provided into chamber, whereby assists in contracting as well partially balancing internal pressure on bellows.