How to Choose the Right Metering Pump for Your Needs
A metering pump is a precise dosing device that delivers a specific volume of liquid within a specified time period. They are known to move fluids at an accurate volumetric flow rate. They’re commonly used for chemicals, solutions, or other liquids.

Types of Positive Displacement Pumps

  • Piston pumps – use a piston to create pressure changes
  • Diaphragm pumps – use a flexible diaphragm
  • Peristaltic pumps – use rollers to compress and release a tube
These pumps can maintain a constant flow rate against varying pressures and are suitable for handling different types of liquids. Metering pumps are used in many industries for precise dosing of chemicals. They are used in:
  • Water treatment
  • Food processing
  • Laboratories
  • Oil and gas, and
  • Pharmaceuticals
Metering pumps offer high accuracy, ensuring consistent dosing. They can handle various liquids, including corrosive ones. The capacity of metering pumps can be adjusted manually or automatically. Metering pumps may require maintenance due to wear and tear on diaphragms and seals. There is also a maximum discharge pressure for each pump model. Choosing the right metering pump involves several considerations. Let’s break it down step by step:  
  1. Fluid Properties
It’s important to consider the fluid properties when choosing a pump. These properties include:
  • Chemical composition
  • Temperature and pressure range, and
  • Abrasiveness of the fluid
  1. Flow Rate and Capacity
To choose the right pump, you need to calculate the required flow rate and ensure the pump’s capacity range covers that flow rate. Consider variations in flow rate due to process changes.
  1. Accuracy and Precision
It’s important to consider the accuracy needed for your application. Some pumps are more accurate than others. Look for pumps with adjustable stroke length for fine-tuning.
  1. Pump Type
The type of pump you choose depends on the fluid you’ll be pumping. Diaphragm pumps are ideal for corrosive or viscous fluids. Piston pumps are suitable for accurate dosing. Peristaltic pumps are great for gentle pumping.
  1. Drive Mechanism
The drive mechanism of a pump is the source of power that drives the pump. Electric motors are commonly used for consistent flow rates. Pneumatic drives are suitable for explosive or hazardous environments. Hydraulic drives are used in high-pressure applications.
  1. Installation and Maintenance
It’s important to consider the available space for pump installation. Look for pumps with accessible components for easy maintenance.
  1. Cost and Budget
It’s important to compare prices of different pump models and consider the operating costs, including energy consumption, spare parts, and maintenance.
  1. Manufacturer and Support
It’s important to choose pumps from reputable manufacturers and ensure that technical assistance and spare parts are available.

Hydraulic Diaphragm Metering Pump

A hydraulic diaphragm metering pump is a type of positive displacement pump used for precise chemical dosing. It uses hydraulic force to move a diaphragm, ensuring accurate metering. These pumps have:
  • Durable diaphragms
  • Safety features like pressure relief valves, and
  • Diaphragm rupture warning systems
They ensure safe handling of hazardous chemicals, optimise chemical usage, and are versatile for various applications.

API 675 Metering Pump

An API 675 metering pump is a type of positive displacement pump designed for precise chemical injection. They are made from durable materials and are used in industries such as:
  • Oil and gas
  • Petrochemical, and
  • Water treatment
These pumps ensure safe and efficient chemical handling as they are:
  • Highly accurate
  • Reliable, and
  • Compliant with the API 675 standard

IDEX Pulsafeeder Metering Pump

IDEX Pulsafeeder is a well-known manufacturer of industrial fluid handling solutions. With over 70 years of experience, they offer a wide range of products like:
  • Diaphragm pumps
  • Rotary pumps
  • Peristaltic pumps, and
  • Controllers
Pulsafeeder products are used in various industries, including:
  • Water treatment
  • Wastewater treatment
  • Agriculture, and
  • Automotive
They are known for their high quality, meeting ISO 9001:2015 and API-675 standards. Pulsafeeder has a strong global presence with representatives providing local support and service.

Conclusion

Choosing the right metering pump for your specific needs involves careful consideration of various factors. These factors include:
  • Fluid properties
  • Flow rate
  • Accuracy
  • Pump type
  • Drive mechanism
  • Installation requirements
  • Cost
  • Manufacturer reputation, and
  • Compliance with industry standards
By carefully evaluating these aspects, you can select a metering pump that delivers optimal performance, efficiency, and reliability in your industrial applications.