How electronic pressure pumps work: The main functional elements of our electronic pressure switch are a sensor that receives magnetic signals when a turbine rotates (flow monitor) and a contact element that is opened or closed by the water pressure (pressure monitor). As a result, at switch-on, by lowering the water pressure, the contact is opened and the pump is put into operation via the rotating turbine. This takes place within a fraction of a second. When switched off, the turbine coming to a standstill and the contact simultaneously closing is reported to the electronics via the contact element and, after a delay of approx. 20 seconds, the pump is deactivated. The start-up pressure is approx. 2.2 bar and is factory-adjusted. While water is being drawn, the pump runs continuously and maintains a constant pressure, depending on the flow rate. When the pump is switched off, maximum pump pressure is achieved, which adjusts independently. This automatically takes into account a decreasing, maximum pressure due to the wear and tear of the pump. The dry-running safety mechanism prevents damage to the pump if the pumped medium is not present. How pressure tank units work 1. The pump pumps water into the line until the consumer unit is closed. 2. The pump then pumps water into the rubber balloon in the steel boiler (outlet pressure in the boiler: 1.5 bar). 3. The rubber balloon expands and compresses the air in the steel boiler. 4. When a specified cut-off pressure is achieved, the pump switches off. 5. When the consumer unit is opened, water first comes out of the rubber balloon (pressure in the boiler decreases). 6. The rubber balloon empties until a specified starting pressure is achieved. 7. The pump turns on and pumps water into the line. Features of GARDENA Electronic Pressure Pumps: - Continuous operation as with a domestic water supply as soon as water starts being consumed, therefore particularly suited to watering systems - Dry-running safety mechanism, therefore particularly suited for use with rainwater reservoirs - Small and lightweight design, therefore can be portable and take up little space - An LCD display for displaying flow rate, pressure and operating status Features of GARDENA Pressure Tank Units: - Switch on only after approx. 5–10 litres of water intake (depending on the model) and therefore especially suitable for use in the home and garden without water systems being operated or in the case of leakages not able to be eliminated on the pressure side (e.g. with old piping systems). - No flow monitor, therefore also suitable for use with very small quantities of intake (e.g. certain types of washing machine, toilets) - Pressure gauge for the pressure display Link: Video: difference between electronic pressure pumps/pressure tank units Electronic Pressure Pump 4000/4ep (1482) Electronic Pressure Pump 4000/5ep (1484) Electronic Pressure Pump 5000/4 (1486) Electronic Pressure Pump 5000/6 Inox ep (1488) Electronic Pressure Pump 4000/4i ep (1481) Electronic Pressure Pump 4000/5 i ep (1483) Electronic Pressure Pump 5000/4I EP (1485) Electronic Pressure Pump 5000/5 Inox EP (1487) Electronic Pressure Pump 4000/4 LCD (1763) Electronic Pressure Pump 4000/5 LCD (1765) Electronic Pressure Pump 5000/5 LCD (1767) Electronic Pressure Pump 6000/5 Inox LCD (1769) Pressure Tank Unit 3000/4 (1770) Pressure Tank Unit 4000/5 (1772) Pressure Tank Unit 5000/5 (1774) Pressure Tank Unit 5000/5 Inox (1775) Pressure Tank Unit 3000/4 eco (1753) Pressure Tank Unit 4000/5 eco (1754) Pressure Tank Unit 5000/5 eco (1755) Pressure Tank Unit 5000/5 eco inox (1756)
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