Patent ID: 7789012

Claim:
A sanitary hygienic weir type diaphragm valve having an improved sanitary bonnet assembly, comprising: a valve body having a weir transposed intermediate and transversely of an inlet and an outlet port of a passageway of the valve body wherein a fluid flows; a hollow bonnet having an opening at a top surface and a flanged base extending from a bottom peripheral end, the hollow bonnet fully housing an actuator connected to a spindle moving up and down through the top opening of the bonnet, the actuator connected to the spindle together forming an actuator assembly; a handle connected to the spindle of the actuator assembly causing the upwards and downwards motion of the spindle in and out of the bonnet and together with the actuator controls the amount of pressure applied to a diaphragm situated between the bonnet and the valve body; and, at least three spaced apart orifices of a size and shape allowing free entry and exit of a liquid introduced into the bonnet, the orifices located at a lowest possible section of the bonnet at a junction of the bottom peripheral end of the bonnet and the flanged base pressing on the peripheral ends of the diaphragm allowing the liquid to thoroughly contact and exit the bonnet assembly, thereby enabling a thorough cleaning of the valve by submersion without the need of disassembly; and, means of connecting the bonnet assembly to the other components of the valve.