Dosing pump for liquid fuel, especially fuel powered heater of motor vehicle

摘要

The dosing pump's pressure regulating valve(3) is integrated into the pump casing(1) and in the installed state can be adjusted without dismantling it. The compression spring(16) loading the membrane(10) of the pump bears upon a stop(17) which is movable for adjustment of the spring tension. The stop is a cylindrical bearing pin(18) with a circumferential section conically tapering towards the dosing pump, and an adjusting screw(21) operated from outside the valve housing acts upon the tapered section.