How to Select a Diaphragm Metering Pump?

The flow rate of a diaphragm metering pump is one of the important performance data for selecting a diaphragm metering pump, and it is directly related to the production capacity and delivery capacity of the entire device. So, what are the characteristics of diaphragm metering pumps? What needs to be considered in its selection?

1. Features of diaphragm metering pump

Diaphragm metering pump has the characteristics of high speed, small size, lightweight, high efficiency, large flow, simple structure, small pulsation of conveying liquid, stable performance, simple operation and convenient maintenance and inspection.

2. What needs to be considered in the selection of a diaphragm metering pump?

In practice, the type and performance of the diaphragm metering pump should meet the requirements of the device flow, head, pressure, temperature, cavitation flow and other process parameters. Therefore, these two aspects should be considered when selecting the diaphragm metering pump: the characteristics of high mechanical reliability, low noise, and low vibration; and in terms of economy, the total cost of equipment cost, operation cost, maintenance cost and management cost shall be the lowest.

Diaphragm metering pumps should be selected from the following aspects according to the actual field use process and water supply and drainage requirements:

1) Flow rate of diaphragm metering pump

When choosing a diaphragm metering pump, take the maximum flow rate as the basis and take into account the normal flow rate. When there is no maximum flow rate, usually 1.1 times the normal flow rate can be taken as the maximum flow rate.

2) The head of the diaphragm metering pump

The head is another important performance data for pump selection. Generally, the head should be selected after magnifying 5%-10% of the margin. The head is related to the pressure, and pressure of 1bar usually represents a head of 10m.

3) Liquid properties of diaphragm metering pumps

Including the name of the liquid medium, physical properties, chemical properties and other properties.

4) There are many operating conditions for diaphragm metering pumps, such as liquid operation, saturated steam power, suction side pressure, discharge side container pressure, altitude, ambient temperature, whether the operation is intermittent or continuous, and whether the position of the diaphragm metering pump is fixed or removable.

5) The piping layout conditions of the device system refer to some data such as the height of the liquid supply, the distance of the liquid supply, the direction of the liquid supply, the lowest liquid level on the suction side and the high liquid level on the discharge side, and the piping specifications as well as the length, material, pipe fitting specifications, quantity and so on, in order to calculate the system head and check the cavitation margin.

The above are the points to pay attention to when selecting a diaphragm metering pump. We hope to help users who choose a diaphragm metering pump. Our metering pumps also have a variety of options such as diaphragm metering pumps.

Ark Electric & Mechanical Co., Ltd. is a manufacturer specializing in R&D and production of various precision metering pumps, flow sensors, industrial online measurement and control instruments and dosing control systems. Its metering pump brands include NEWDOSE and E-DOSE. Ark Electric & Mechanical Co., Ltd. is committed to providing excellent products and services in the fields of wastewater treatment, pure water treatment and water purification engineering, petrochemicals, food and beverage, electric power, metallurgy, pharmaceuticals, papermaking, printing and dyeing, biological engineering and water treatment. If necessary, please consult.