Dosing pumps for precise and safe chemical dosing

What is a dosing pump?

A dosing pump is a positive displacement pump which is designed to dose precise and controlled amounts of liquid over time, independent of back pressure in the system. Unlike centrifugal pumps, dosing pumps deliver a predetermined flow per stroke or revolutionmaking them ideal for chemical dosing.

Dosing pumps are often used when:

• high dosing accuracy is required

• small flows should be precisely regulated

• the process is pressurised

• the medium is aggressive or toxic

Types of dosing pumps in Lyma's range

Lyma offers several types of industrial metering pumps, adapted for different media, pressures and capacity requirements.

Diaphragm metering pumps

Motorised diaphragm metering pumps are a common choice for chemical dosing in the process industry. They offer:

• high chemical resistance

• seal-free construction

• high safety in case of toxic media

• possibility of ATEX design

Piston metering pumps

Piston metering pumps are used when high pressures and very precise dosing required. They are well suited for:

• high back pressures

• stable and repeatable dosage

• demanding industrial processes

Gear pumps for dosing

For applications that require pulse-free dosing gear pumps can be an alternative. They are often used in:

• continuous dosing

• smooth flow without pulses

• low to medium viscosity chemicals

How to choose the right dosing pump?

To select the right dosing pump, it is important to consider both process and media. Lyma works according to a clear selection process:

1. Define the medium
   - chemical composition, temperature, pH and viscosity

2. Determine flow and dosage requirements
   - continuous or intermittent dosing, desired accuracy

3. Determine back pressure and system conditions
   - pipe lengths, valves and pressure levels

4. Choose the right pump type and material
   - diaphragm, piston or gear and choice of material

We help you all the way to ensure reliability, longevity and optimal process control.

Dosing pumps for demanding industrial environments

Lyma dosing pumps are designed for use in environments where:

• aggressive chemicals are present

• high reliability is crucial

• safe handling is a requirement

They are frequently used in:

• water and wastewater treatment

• chemical industry

• steel and metal industry

• the pulp and paper industry

• the energy sector

Lyma range of metering pumps

At Lyma you will find dosing pumps in different materials, capacities and designs, customised to your application. We also offer:

• accessories such as pulsation dampers and control systems

• material selection for aggressive media

• ATEX-approved solutions

• technical advice and support

Our focus is always on process reliability, precision and long-term operational economy.

Do you need help with chemical dosing?

Contact Lyma and we'll help you choose the right dosing pump for your process - from feasibility study to finalised solution.