Chemical metering pump for dosing regulating pH, chlorine, sodium hypochlorite, food, medicines, detergents, peristaltic pumps.
There are different types of pumps on the market, metering pumps top the list. As their 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 the automatic dispensing of chemicals.
What is a metering pump?
The pump draws a fixed volume of a chemical into the chamber, and then injects it into a pipe or reservoir that may 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.
Metering 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 metering 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 easy mixing of a chemical into the liquid or product in equal doses.
The injector has a self-actuating mechanism that helps prevent the liquid in the supply line from flowing when the pump stops. This injector also directs the chemical supply towards the center of the flow, which helps to avoid product wastage, which occurs due to incorrect chemical dosing on the sidewalls.
Foot Valve: As the name suggests, this 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 runs out.
Control System: Operators use software and control systems to ensure proper pump operation. These control systems also help automate the pumps to make them work better. Centralized sensor control systems and SCADA systems are used for this purpose. The control systems use sensors to detect the levels of chlorine, pH and other substances.
What type of metering pumps are used in the industry?
Like any other industrial pump, metering pumps are differentiated according to their use and typical actions. They are designed to dose different chemicals at different pressures.
The three different dosing pump models are:
These pumps use a diaphragm mechanism. There are two types of diaphragm pumps:
Constant Injection Pump
Pulse Injection Type Pump.
Constant injection diaphragm pumps have valves and pistons at the outlet and inlet. The piston can empty and fill the chamber, inlet or outlet. The chamber is filled when the piston is sucked in. The chemical is injected at a specific dosage and at a predefined rate.
On the other hand, diaphragm pulse injection pumps are equipped with a solenoid coil, which injects the chemicals in pulses.
These pumps have simple designs and are inexpensive.
These pumps have geared impellers. They move a preset volume of chemicals through these impellers. Lobe pumps are suitable for high viscosity fluids and high flow rates.
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 fluid flow.
Where can we use metering 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:
Oil and gas
Cosmetics and personal care products
Water and liquid production lines
After learning how metering pumps work and the importance of metering pumps, you may have realized the importance of sourcing from a reliable supplier. Carbotecnia is a leading supplier of top brand metering, diaphragm and peristaltic pumps.