HIGH-PRESSURE VALVE Russian patent published in 2016 - IPC F16K11/02 F15B13/02 

FIELD: engines and pumps.

SUBSTANCE: high pressure valve is used for hydraulic drives of high pressure pumps. Differential pilot-operated pair has fluid feed channels of high pressure and fluid discharge in low pressure zone. Spring is installed in the zone of low pressure. Third belt is made before spring. Cavity between the second and third belts is connected with zones of high and low pressure through hydraulic resistance.

EFFECT: this allows to reduce static error upon request in case of fluid carryover with the help of quite simple device and increase accuracy of valve control.

2 cl, 2 dwg