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An Ultimate Guide To The Solenoid Metering Pumps

 Chemical dosing and metering pumps are employed to distribute or inject precisely measured amounts of fluid into a process. These pumps are commonly brought to use during water treatment applications, such as cooling towers, boilers, industrial wastewater treatment, or for diverse chemical processes.

Due to their minimal cost, convenience of use and reliability, and high level of precision, solenoid metering pump is popular in chemical feed applications. And, this is the reason many people are shifting over to these metering pumps. In this article, we have explained more about the metering pumps.

Solenoid Metering Pump


Defining the Solenoid Metering Pump

The solenoid metering pump is the chemical injection pump or dosing pump. It is a member of the positive displacement pump family. The primary function of a dosing pump is to deliver precise amounts of chemicals into a system. Dosing pumps are available in various configurations, including piston, peristaltic, diaphragm, and hydraulic diaphragm designs.

How Does Solenoid Metering Pump Work?

The solenoid metering pump is constituted by using an electromagnetic push rod to drive a diaphragm in the pump head reciprocating action, resulting in changes in volume and pressure of the pump head chambers. Pressure changes induced by the suction and discharge valve opening and closing are employed to achieve quantitative liquid suction and discharge.

A magnet pushes the shaft forward and backwards by turning on and off the solenoid. This stroke movement is conveyed to the diaphragm in the dosing head. To prevent the feed chemical from running back during pumping, two non-return valves have been installed. But that's not all there is to it. The capacity of a solenoid-driven metering pump can be altered by adjusting the stroke length and stroke rate.

Tips To Consider Before Purchasing the Solenoid Metering Pump

There are various elements to consider when selecting which metering pump is the best option for a chemical injection application. These considerations include:

  • ·         Construction Materials
The metering pumps are available in various materials; the most common is stainless steel. Other typical materials include PVC and Kynar polyvinylidene fluoride. Corrosion, erosion, and solvent action of the chemical must all be considered by the user.
Stainless steel pumps may be required when working with solvent-based chemicals, whereas plastic-headed pumps may be required when operating with acids and alkalis. When working with abrasive slurries, it is also necessary to address the impacts of erosion.
·         Flow Rate
Determining the exact flow rate necessary for the application is critical since metering pumps should never be oversized. A metering pump should be sized so that the maximum predicted flow rate is 85 to 90 per cent of the pump's capacity. The flow rate set-point can be maintained automatically by adjusting the stroke length with electric or pneumatic positioners, which will result in a total 10-to-1 turndown ratio being delivered.
The number of doses remains constant while each dose is reduced in this procedure, resulting in uniformly dispersed doses in a continuously flowing line.
·         Driver
Depending on the available facilities, drivers must be picked powered by either electricity, water, natural gas, wind, or solar. Pumps used in distant places can never be inspected as frequently as in controlled situations; thus, users must consider any environmental hazards present in the operating area.
·         Chemical Makeup
chemicals are available in various formulations, ranging from thin to highly viscous, and when transported, they can be categorized as slurry or off-gas. The conventional metering pumps can normally handle transparent liquids with viscosities ranging from water-like to 1,500 centipoises.
·         Control Method
If the pump is being utilized in manual continuous operation or operation controlled by a process signal, the operator must be aware of this.
·         Environment
Decide whether the pump will be used indoors or outside before purchasing it. It is necessary to keep the pump out of direct sunlight if it is to be used outside. The only fluids that pump in freezing temperatures can pump are those that do not freeze at those temperatures.

WRS Dosing Here to Help You!

Metering pumps have a simple principle, but the type and size of the pump must depend on a wide range of variables. It is at this point that we come in! At WRS Dosing, we have a team of professionals available to assist you at any time.

All of your concerns will be answered, and a solenoid metering pump system that is optimum for your situation will be designed. Please get in touch with us as soon as possible to assist you with your next project. We will be helping you out during the entire process of obtaining this metering pump at the earliest. 

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Location: 60 Paya Lebar Rd, 11 37 Paya Lebar Square, Singapore 409051

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