Method and apparatus for supplying a preset quantity of a liquid, using a tank containing the liquid, a check valve distributor, and a hose connecting the tank to the check valve distributor, and having a pumping unit, a solenoid valve, and a pulsed flow meter interposed between the tank and the che
Method and apparatus for supplying a preset quantity of a liquid, using a tank containing the liquid, a check valve distributor, and a hose connecting the tank to the check valve distributor, and having a pumping unit, a solenoid valve, and a pulsed flow meter interposed between the tank and the check valve distributor, including determining a volume difference between a first quantity delivered by the apparatus and a first quantity detected by pulsed flow meter, as the liquid is pumped at constant flow rate, low pressure and under laminar flow, during a first delivery of the liquid; starting a subsequent delivery of the preset quantity of the liquid, by opening the solenoid valve; and stopping the subsequent delivery of the preset quantity of the liquid when a difference between the number of pulses generated by the pulsed flow meter corresponding with the preset quantity, and the number of pulses output by the pulsed flow meter reaches a number of pulses corresponding to the volume difference; and during a subsequent delivery, the liquid flows inside the hose at a same constant flow rate, under a low pressure, and under laminar flow, as during the first delivery of the liquid.
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A method for delivering a preset quantity of a liquid using an apparatus comprising a conduit communicating a reservoir containing the liquid with a check valve distribution device, and having a pump, a solenoid valve, and a pulsed flow meter interposed between the reservoir and the check valve dist
A method for delivering a preset quantity of a liquid using an apparatus comprising a conduit communicating a reservoir containing the liquid with a check valve distribution device, and having a pump, a solenoid valve, and a pulsed flow meter interposed between the reservoir and the check valve distribution device, the process comprising the steps of: determining a volume difference during a first delivery of the liquid between a first quantity of liquid delivered by the apparatus and a first quantity detected by the pulsed flow meter, as the liquid is pumped at constant flow rate, low pressure and under laminar flow; predisplaying a desired quantity of the liquid to be delivered in a subsequent delivery; opening the solenoid valve to start the subsequent delivery of the desired quantity of the liquid, with the liquid being pumped at the same constant flow rate, low pressure, and under laminar flow, as during the first delivery of the liquid; and stopping the subsequent delivery of the desired quantity of the liquid when a difference between: (i) a number of pulses of the pulsed flow meter corresponding to the desired quantity, and (ii) the number of pulses from the pulsed flow meter, reaches a number of pulses corresponding to the volume difference.
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