Time delay water valve control servo - comprises three=way double position valve with venturi nozzle in outflow pipe

摘要

The control is for water valves, involving time-delayed, automatic return. Between a switch or press button and a control component which operates the valve, an auxiliary unit is arranged which in the opening position is displaceable quickly and in the closure position moves slowly with the aid of a throttle body. Attached to the water pipe is a servo device which comprises a three-way and two-position valve, an hydraulic unit and a venture nozzle located in the water outflow pipe.