Ripple-effect removing valve for use with a pressure detecting device in a control assembly of a pump

A control assembly for a pump which includes a hollow body having an inlet and an outlet that is formed in an upper portion of the hollow body, and a rotary impeller unit disposed in the hollow body for increasing pressure of fluid that flows from the inlet to the outlet, said control assembly comprising:

• a ripple-effect removing valve including:
• a casing having a lower inlet end adapted to be mounted on the upper portion of the hollow body of the pump while maintaining fluid communication therewith, an upper outlet end and an interior fluid passage fluidly communicating said inlet and outlet ends, said fluid passage including a generally upright lower section with a top opening, a generally upright upper section with a bottom opening, and a substantially horizontal intermediate section fluidly communicating said upper and lower sections;
• and
• regulating means mounted on said casing for controlling fluid flow from said lower section to said upper section of said fluid passage;
• and
• a pressure detecting device mounted on said casing of said ripple-effect removing valve, said pressure detecting device including a housing having a lower chamber fluidly communicated with said upper outlet end of said casing, a switch assembly disposed in said housing and adapted to be connected electrically to the impeller unit of the pump, a diaphragm unit disposed in said lower chamber, and an actuator mounted on said diaphragm unit and connected operably to said switch assembly, said actuator being urged by said diaphragm unit to control said switch assembly to deactivate the impeller unit when the pressure of the fluid entering said lower chamber via said fluid passage of said casing reaches a predetermined value.