What is dosing pump

The product is released in pulses or flow rate. The non-return valve has a self-actuated mechanism that stops the liquid in the delivery line from going up after the required flux rate is delivered or once the pump stop. The injector also ensures that the product is delivered to the middle of the flow rather than the side wall to avoid wastage of product, for thorough mixing, and to avoid damaging the walls especially when the fluids are acids or peroxides.

Control System — Modern plants use control systems and software to ensure the dosing pump is accurate and to provide automation. SCADA systems and other central control systems with sensors for pH, chlorine, and similar and variable rate control are used to this end. Types of Dosing pump for water treatment plant There are 4 different types of dosing pumps designed based on their action and pumping mechanism: Diaphragm-Type Constant Injection Pump — This is a pump chamber filled and emptied by a piston.

It has a diaphragm and inlet and outlet valves. Diaphragm-Type Pulse Injection — This method employs a diaphragm mechanism. This pump is controlled by a solenoid coil that sucks in and injects the chemical in pulses. The time-gap between the pulses provide the control of flow rate. This pump is generally less accurate than other types.

However, they are preferred for their simplicity both mechanically and electrically, and relative inexpensiveness. Lobe-Type Pumps — This design allows the flux to pass through a set of meshing-gear-type impellers. Due to the volume rate passing between these impellers not being as accurate as other diaphragm pumps and the impellers being quite susceptible to wearing, these pumps work to their full potential only when the flux is highly viscous and self-lubricating to minimize the wear.

Peristaltic Pumps — Peristaltic pumps consist of a flexible tube for carrying the product. This tube has a semi-circular cross section.

Know the Components of a Dosing Pump A dosing pump is made of several components that actively contribute to its functioning. These components are described below: Chemical Tank : The tank is designed to hold the material to be dosed. Dosing Pump : A pump features an inlet, a dosing line, and a suction line. A pump varies in size and materials depending on the application. A dosing pump is made of varied materials such as rubber, plastic or stainless steel.

Injector : This is a non-return valve that is designed to inject the chemical into the flow. The injector is designed to overcome the pipe pressure, and enables easy mixing of a chemical into the liquid or product in equal doses.

The injector has a self-actuated mechanism that helps avoid the liquid in the delivery line from flowing upwards, once the pump has stopped. This injector also directs the chemical delivery to the middle of the flow, thereby helping avoid product wastage, which occurs due to incorrect dosing of chemicals on the side walls.

Sometimes, this incorrect dosing of chemicals may also damage the walls, especially if they involve acids or peroxides. Foot Valve : As the name suggests, this is a one-way or a non-return valve that is attached to the line of suction. It is mostly positioned at the product drum.

A float switch is attached to it to check the availability of the product. This switch raises alarm when the product runs out. These materials make it suitable in unfavorable conditions. Control System: Today, most plant owners utilize software and control systems to ensure the appropriate functioning of the pumps.

These control systems also help automate the pumps for better functioning. Sensor control systems are designed to detect the levels of chlorine, pH, and other substances. A Few Variants of Dosing Pumps Used in Industries Like any other industrial pumps , these dosing pumps are differentiated based on their purpose and their typical actions. The Grundfos DDA dosing pump is designed as the perfect solution for complex and demanding applications.

The pump is equipped with FlowControl, AutoFlowAdapt, pressure monitoring, and integrated flow measurement. Additional operating modes are also available, such as automatic venting. The Grundfos DDE dosing pump is the economical entry-level model for general applications with all the benefits of digital dosing.

The pump has a maximum turn-down ratio of 1: and a smooth, constant dosing. The simple control, stop function and empty signal of the tank make the pump ideal for basic applications. Grundfos dosing pumps are the ideal solution for increasingly complex dosing. These dosing pumps have new drive and setting mechanisms.

With the user-friendly operation and an intelligent FlowControl system, they ensure extremely accurate, reliable and profitable processes, combined with the best possible price-performance ratio.

Or view the full range here. Selecting the right pump for your process can be a challenge. Our pump specialists are therefore happy to help you with this. Our goal is to completely unburden you in the field of pumps. For example, we select the ideal pump for your process, maintain or overhaul the pump and we are always ready in case of emergencies to guarantee the continuity of your process. Dosing pumps - get to know everything about this pump type.

What are dosing pumps? What are dosing pumps used for? The working principle of dosing pumps A dosing pump sucks a predetermined amount of liquid into the pump chamber and adds the liquid to a process. Suitable applications Dosing pumps are used for a huge range of applications.

Disinfection of process water Chemical industrial applications Food and beverages Cleaning-In-Place Ultrafiltration Irrigation Disinfection and pH adjustment One dosing pump per application Below is explained which dosing pumps are suitable for various applications. Dosing pumps for high pressure applications up to bar The Grundfos DMH dosing pump is very suitable for applications where high pressure is required.

Dosing pumps for Demanding applications The Grundfos DDA dosing pump is designed as the perfect solution for complex and demanding applications.