Agricultural spraying valve unit for dispensing e.g. water in agricultural field, has pressure chamber connected with outlet, and main valve transferred into opened switching state by change of volume of chamber fluid

摘要

The unit (1) has a pressure chamber limited by a valve body of a main valve (4) i.e. seat valve. An electromagnetic pilot valve (55) i.e. 3/2-way valve, connects the pressure chamber with a primary spacer (2) in a switching position, and connects the pressure chamber with an outlet (48) in another switching position. The main valve is transferred into an opened switching state in the latter switching position of the pilot valve caused by a displacement of the valve body and by a change of volume of the pressure chamber fluid from the pressure chamber to the outlet.