#meteringprofil

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How does the hydraulic piston work? The motor piston moves under the pressure of water. A system of valves allows the movement to be reversed. This water powered piston creates a reciprocating motion along the axis of the pump body. Each piston cycle corresponds to a predetermined volume of water, which passes through the pump. The speed of the motor varies proportionally to the water flow.How does the dosing piston work? The dosing piston, driven by the hydraulic piston, mechanically displaces the volumes of fluid trapped in the system. On the suction side, the volume expands, while on the discharge side, it contracts. The volume per stroke is therefore fixed and theoretically constant, regardless of outlet pressure, inlet vacuum or fluid properties.How is the injection rate controlled? A non-return suction valve opens during the suction in the additive pipe and it closes during the injection and mixing phase. The dosing seal this vacuum by sealing the dosing body and the dosing piston. The dosing seal serves as a pressure valve (when lowering). The metering piston therefore injects a fixed volume of additive at each cycle and acts as a reciprocating piston. The dosing piston will inject the defined volume of additive in proportion to the volume of water passing through the water-powered piston. This volume of additive is manually adjustable by adjusting the capacity of the dosing body. The principle of operation thus ensures a constant and continuous dosage proportional to the water flow, independent of variations in water flow and pressure.How is the additive mixed? The injection of the additive into each volume of driving water in the mixing chamber allows a continuous and homogeneous downstream of the dosing pump. The dosing piston therefore continuously injects a fixed volume of additive and acts as a reciprocating positive displacement piston. The dosing piston will inject the set volume of additive in proportion to the volume of water passing through the water driven piston. This volume of additive is manually adjustable by adjusting the capacity of the dosing body. Therefore, the operating principle ensures constant dosing, independently of the variations in flow rate and pressure of the water. The injection of the additive is proportional to the water flow rate.Adjustable dosing without measuring device The maximum dosing ratio is given by theoretical calculated ratio: surface of dosing piston divided by surface of water piston. The mechanical adjustment system allows the user to reduce manually the dosing volume to obtain a lower dosage. This is obtained by adjusting the stroke length of the dosing piston. As during the operation, there is no measuring device to control or interact with the dosing assembly. The dosing percentage is therefore only obtained by theoretical construction, which is only based on hydraulic behaviors described above. The dosatron technology is available in a wide range of dosing.www.dosatron.com

Verder Liquids developed a new metering and dosing pump which has been designed specifically to challenge traditional technological solutions to chemical dosing in municipal and industrial pumping applications. The so called Verderflex Ds500 has been developed to improve the accuracy and save the end user money by looking at Total Cost of Ownership (TCO), which equals upfront costs and lifetime operation.Dosing, accuracy and smoothed flow with easy maintenance of ‘click and go’A key advantage of the Ds500 is that it has an easy ‘click and go’ cartridge change. The main wearing component, the peristaltic cartridge, can be changed in one minute giving minimal maintenance time and spare part components. In combination with RA (Remote Assistant) IOT Monitoring, it supports monitoring but does not allow control of the pump. It ensures accuracy in the process and alerts to any problems. Changes are predicted, so maintenance can be scheduled. Performance is recorded and feedback provided. As a result, downtime is managed and minimised.The Ds500 can deliver up to +/1 % accuracy with a smoothed flow (i.e., reduced pulsation due to the design). Furthermore, this pump has an accurate flow performance from 0.1 up to 500 ml/min and pressures of up to 7 bar. This means greater accuracy and smoothed flow. It wastes less chemical and saves on the life operation cost, supported with a 5000:1 turndown.The unit by nature of being a peristaltic pump can handle solids, abrasives, slurries, crystals and is not affected by ‘off gassing’ (i.e., such as sodium hypochlorite in the potable water industry). The Ds500 will give a reliable working life. It does so, without the need for additional valves or complicated pipework required by other systems, and therefore has lower installation cost.Already exhibited at Achema in Frankfurt am Main, Germany, the new Ds500 is flowing into the market and having a smoothing effect on the industry. Features and Benefits of the Verderflex Ds500 - Click and go cartridge - Tool free maintenance - Smoothed flow for improved dosing - Less chemical usage (+/- 1% accuracy) - Touchscreen for easy control - Connections for remote control - Small footprint with secure mounting - IOT enabled: Remote Assistant monitoringWatch the video for all the benefits of the Verderflex Ds500 in just 1 minute:www.verderliquids.com

The reaction environment for the production of anode material is hot, aggressive and strongly alkaline. The special challenge: The chemical reaction takes place over several days at temperatures above 50 °C and a high basic pH value. In addition, decomposing metal solutions, ammonia water and caustic soda are involved in the production process. The pH value must be measured continuously and stabilised by the controlled addition of caustic soda. The chemical reaction takes place in a self-contained reactor.The environment and components thus place high demands on the sensors and metering pumps used in the process. With its robust technology, ProMinent makes it possible to keep all parameters within the target range.From small pilot project to large reactor The gamma/ X solenoid-driven diaphragm metering pump enables reliable production processes thanks to a fast response time and accurate metering (Image: ProMinent).A manufacturer of anode material was looking for a technology that, despite the demanding environment, would continuously deliver reliable measured values for pH control and meter all chemicals reproducibly and with pinpoint accuracy. The anode material manufacturer started with a small-scale pilot project to test the reproducibility and sensor service life in practice.The gamma/ X solenoid-driven diaphragm metering pump is used in the test, which takes over the functions of the sigma motor-driven diaphragm metering pump used later in the main project in the targeted low performance range. Both pumps can be adjusted so flexibly that they meter precisely even under difficult process conditions. This enables safe and efficient processes. During the pilot phase, a Prominent contact person was available at all times to find the optimal solution together with the customer in case of questions.The initial pilot project was a success and the main project has been successfully implemented and realised in the meantime.www.prominent.com