PUMP VALVE

Abstract

The object of the invention is a dispenser valve for dispensing a fluid, with an inlet for connecting a fluid supply conduit, an outlet, a main channel connecting the inlet to the outlet, a main valve assembly for controlling a fluid flow through the main channel, a control lever for actuating the main valve assembly, an automatic safety shutoff, which is designed to move the main valve assembly to a closed position regardless of the position of the control lever when the fluid pressure at the inlet falls below a minimum value, and with a pretensioning assembly that pretensions the main valve assembly to the closed position and causes a variable opening cross-section of the main valve assembly depending on the fluid pressure at the inlet.According to the invention, the pretensioning equipment is configured to generate a discontinuous opening feature of the main valve assembly (16) such that a closing force acting on a valve body (20, 20', 20'', 22) of the main valve assembly is reduced in a first opening cross-sectional area extending from the closed position of the main valve assembly to a limit opening cross-section. By means of the features according to the invention, the fluid pressure upstream of the main valve assembly during operation with a full hose can be reduced in a simple and controlled manner.

Claims

1. A dispenser valve for dispensing a fluid, comprising an inlet (13) for connecting a fluid supply conduit, an outlet (14), a main channel (15) connecting the inlet (13) to the outlet (14), a main valve assembly (16) for controlling a fluid flow through the main channel (15), a control lever (17) for actuating the main valve assembly (16), an automatic safety shutoff, which is designed to move the main valve assembly (16) to a closed position regardless of the position of the control lever (17) when the fluid pressure at the inlet (13) falls below a minimum value, and a pretensioning assembly (18) that pretensions the main valve assembly (16) to the closed position and causes a variable opening cross-section of the main valve assembly (16) depending on the fluid pressure at the inlet (13),characterized in that the pre-tensioning equipment (18) is designed to generate a discontinuous opening characteristic of the main valve assembly (16) such that a closing force acting on the main valve assembly (16) is reduced in a first opening cross-sectional area extending from the closing position of the main valve assembly to a limiting opening cross-section. 14 Claims follow,