MANUALLY ACTUATABLE QUICK-RELEASE VALVE

摘要

Manually actuatable quick-release valve for reducing the fluid pressure in a reference pressure line (5) to the fluid pressure in a main air line (3) which is suitable for manual release on a compressed air brake unit, comprising an elastic membrane (7) for pressure-dependent closing and opening of a channel (14) from the reference pressure line (5) to a dynamic pressure chamber (21), wherein the membrane (7) is pressurized on one side by fluid pressure in the main air line (3) and on the other side by fluid pressure in the reference pressure line (5). A monostable directional control valve (16) with a valve slide (17) for pressure-dependent closing and holding open of the channel (14), wherein the valve slide (17) is pressurized on one side by fluid pressure in the dynamic pressure chamber (21) and on the other side by fluid pressure in the reference pressure line (5), and which closes the channel (14) in the switched position and opens the channel in the home position, and a manual actuating element (30) which upon actuation moves a monostable slide element (22) into a switched position, wherein said slide element (22) in the home position forms a channel (26) from the dynamic pressure chamber (21) to a chamber (29) connected to the atmosphere (28) in order to allow a through flow of fluid out of the dynamic pressure chamber (21) to the atmosphere (28), wherein in the switched position the slide element (22) opens a further channel (15) from the reference pressure line (5) to the dynamic pressure chamber (21) in order to allow filling of the dynamic pressure chamber (21) with fluid from the reference pressure line (5) independent of the position of the valve slide (17).