Chemical dosing pumps

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Chemical dosing pumps for water conditioning

Regulate pH, chlorine, sodium hypochlorite, food, drugs, detergents, peristaltic pumps.

There are different types of pumps on the market, metering pumps top the list. As the name suggests, they are positive displacement pumps designed to inject chemicals into vapor, gas, or liquid.

In recent years, they have become an indispensable part of integrated dosing systems that enable automatic dispensing of chemicals.

What is a metering pump?

The pump sucks a fixed volume of a chemical product into the chamber, and then injects it into a pipe or a tank that can contain water or fluid to be dosed.

The pump is driven by an air actuator or an electric motor. The electric motor is provided with a controller that helps to turn the pump on or off, as well as regulate the flow.

Dosing pump components:

Chemical tank: The tank is designed to contain the material to be dosed.

Dosing pump: The pump has an inlet, a dosing line, and a suction line. The pump varies in size and materials depending on the application. A dosing pump can be made of rubber, plastic, or stainless steel.

Injector: It is a non-return valve designed to inject the chemical into the flow. The injector is designed to overcome the pressure in the pipeline and allows a chemical product to be easily mixed into the liquid or product in equal doses.

The injector has a self-actuated mechanism that helps prevent liquid in the supply line from flowing when the pump stops. This injector also directs the supply of chemicals to the center of the flow, helping to avoid product waste, which occurs due to improper chemical dosing on the side walls.

Foot valve: As its name suggests, it is a one-way or non-return valve that is attached to the suction line. A float switch is attached to check product availability. The switch sounds an alarm when the chemical is depleted.

Control system: Plant users use software and control systems to ensure proper pump operation. These control systems also help automate the pumps to perform better. For this, centralized control systems by sensors and SCADA systems are used. Control systems use sensors to detect levels of chlorine, pH, and other substances.

What type of metering pumps are used in the industry?

Like any other industrial pump, metering pumps differ based on their use and their typical actions. They are designed to dose different chemicals at different pressures.

The three different models are:

Diaphragm pumps:

These pumps use a diaphragm mechanism. There are two types of diaphragm pumps:

Constant injection type pump

Pulse injection type pump.

Constant injection diaphragm pumps have valves and pistons at the outlet and in the inlet. The piston can empty and fill the chamber, inlet or outlet. The chamber fills when the piston is drawn in. The chemical is injected at a specific dose and at a predefined rate.

Diaphragm pulse injection pumps are equipped with a solenoid valve, which injects chemicals in pulses.

These pumps have simple designs and are cheap.

Lobe pumps:

These pumps are equipped with gear drives. They move a preset volume of chemicals through these impellers. Lobe pumps are suitable for high viscosity fluids and high flow rates.

Peristaltic pumps:

Of all the pumps mentioned, these are the most accurate metering pumps in use today.

They have bent flexible tubes that allow the passage of fluids. A roller on the pump helps control the flow of the fluid.

Where can we use the dosing pumps?

Metering pumps are used in a wide variety of industrial, commercial, municipal and marine applications. They are used for water treatment applications in the following industries:

  • Pharmaceutical
  • Dairy farms
  • Horticulture
  • Breweries
  • Energy generation
  • Oil and gas industry
  • Cosmetics and personal care products.
  • Water and liquid production lines

After learning about how metering pumps work and the importance of, you may have realized the importance of sourcing from a reputable supplier. Carbotecnia is one of the main suppliers of metering, diaphragm and peristaltic pumps of the best brands.