FIELD: engines and pumps.
SUBSTANCE: proposed device comprises piston pump with smooth adjustment chamber connected to its pressure chamber, pressure release valve and outlet union. Extra smooth adjustment chamber with bearings, extra pressure release valve, shutoff valve and outlet union are connected to pump vacuum chamber. Slider is secured to pump rod sliding in guide secured to pump case. In pump operation, said slider displaces in guide which prevents valve skew and rod seal failure.
EFFECT: higher accuracy of setting required pressure and los overpressure and reliability.
5 dwg
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