Chemical Pump Encyclopedia

A Guide to Diaphragm Pump Selection: Choose the Perfect Diaphragm Pump for Your Needs

High quality diaphragm pump suppliers

As the key equipment in chemical fluid transportation, the selection process of diaphragm pump directly affects the production efficiency and operating cost. In recent years, with the improvement of industrial automation, the demand for diaphragm pumps is also increasing. However, there are many brands and models of diaphragm pumps on the market, so how to find the most suitable product among many choices has become a big challenge. As a leading and reliable chemical pump manufacturer, QEEHUA PUMP is committed to providing customers with high-quality diaphragm pumps and perfect after-sales service. How can I choose the one that suits me? This article will bring you a detailed guide to the selection of diaphragm pump, which will help you to make it easy and choose it accurately!

When selecting diaphragm pump, many factors need to be considered, including the nature of conveying medium, flow and pressure requirements, installation conditions, operating environment temperature, industry certification and so on. Each factor may affect the performance and life of the pump. In order to ensure the best operation effect and lasting performance, we will analyze these key problems one by one and provide you with targeted suggestions and solutions.

Professional consideration, accurate selection

The selection of diaphragm pump is a comprehensive technical work, and the following six factors need to be fully considered to ensure that the selection result fits the application requirements perfectly:

1. The nature of the conveying medium

When choosing a diaphragm pump, the first thing to consider is the nature of the fluid the pump will handle. The chemical composition, corrosiveness and viscosity of fluid will directly affect the selection of pump. For example, for the chemical medium with strong corrosiveness, the pump with corrosion-resistant material should be selected to avoid the failure and leakage caused by the corrosion of the pump body.

The viscosity of the fluid is also a key factor to be considered. High viscosity fluid will increase the load of the pump, so it is necessary to choose a specially designed high viscosity fluid delivery pump. If the transported fluid contains abrasive solid particles, it is necessary to choose a pump with good wear resistance to reduce wear. The diaphragm pump of QEEHUA PUMP has excellent wear resistance, which can effectively meet the demand of medium transportation containing solid particles.

2. Traffic demand assessment

According to the actual demand of the application system, accurately determine the required pumping flow. Flow refers to the amount of fluid that a pump can deliver in a unit time. Flow is an important indicator to measure the performance of a pump, usually expressed in cubic meters per hour (m/h). Too high flow rate will lead to equipment waste and energy consumption increase, while too low flow rate may not meet the requirements of production process.

3. Head pressure analysis

Make clear the installation position of the pump, the length and height of the conveying pipeline, and calculate the required value of the lift pressure. Head pressure refers to the pressure difference between the suction end and the discharge end of the pump, usually in meters (m). Choosing a diaphragm pump with too low head pressure will lead to insufficient conveying capacity; However, if the lift pressure is too high, it will cause the overload operation of the equipment and increase the wear and energy consumption.

4. Installation conditions and operating environment

The installation conditions and operating environment of diaphragm pump will also affect the selection of pump. The factors to be considered include lift pressure, suction lift, ambient temperature and humidity. Head pressure refers to the pressure difference that the pump needs to overcome, while suction lift refers to the vertical distance from the pump to the fluid source.

In some high-temperature or low-temperature environments, the material and design of the pump need to be able to adapt to temperature changes to ensure the normal operation of the pump.

5. Certification standards are met.

In some specific industries, such as food, pharmaceutical and petrochemical industries, the certification and safety requirements for pumps are very strict. Diaphragm pump needs to pass the corresponding certification, such as ATEX, FDA, etc., to ensure its safe use in high-risk environment. QEEHUA PUMP’s products have passed many international certifications such as ISO9001, ISO14001, CE, SGS, etc., which meet the global industry standards and safety requirements and provide reliable protection for customers.

6. Maintenance and operation costs

The maintenance and operation cost of diaphragm pump are the key factors to be considered in the purchase process. Choosing a pump with high reliability and convenient maintenance can effectively reduce operating costs and improve production efficiency.

Unique Advantages of Diaphragm Pumps

Compared with other types of pumps, diaphragm pumps have the following incomparable advantages:

  • Leakproof operation: Isolating the pump chamber from the exterior with a diaphragm allows completely sealed operation even under high pressure, eliminating leaks of handled media which is important for transferring toxic, flammable, corrosive or expensive liquids.
  • Strong self-priming capability: Diaphragm pumps can work normally even with liquid levels several meters below the pump, meeting the needs of complex operating conditions.
  • Wide media adaptability: Diaphragm pumps can transfer various types of liquids including viscous liquids, liquids containing solid particles, and corrosive liquids, with an extremely broad application range.
  • Simple structure and easy maintenance: Diaphragm pumps have simple structures for easy disassembly and maintenance with low maintenance costs. Operation requires only basic mechanical knowledge.

QEEHUA PUMP: Your Diaphragm Pump Expert

QEEHUA PUMP is a chemical pump manufacturer with many years of industry experience and strong technical strength, and is committed to providing users with high-quality diaphragm pump products and perfect pre-sales and after-sales services. The company’s products cover all kinds of diaphragm pumps, and the materials can be stainless steel, fluororubber, polytetrafluoroethylene, etc., which can meet the needs of different media and working conditions.

High quality diaphragm pump suppliers

QEEHUA PUMP offers a wide range of diaphragm pumps with various specifications, place your order now and enjoy efficient and reliable chemical solutions!

With its excellent performance and reliable quality, QEEHUA PUMP diaphragm pump has won the trust and recognition of users and is widely used in chemical industry, petroleum, natural gas, electric power, metallurgy, environmental protection, medicine and other industries.


When purchasing a diaphragm pump to meet your specific application needs, it is essential to carefully examine all factors affecting performance and reliability. Double diaphragm pumps stand out for their versatility and ability to adapt to various industrial applications. However, considering the six key issues above is crucially important to ensure optimal operation and durability.

By evaluating the nature of the transferred fluid, flow rate and pressure requirements, installation conditions, operating environmental temperature, industry certifications and safety requirements, as well as maintenance and operating costs, you can make the best selection. QEEHUA PUMP provides reliable diaphragm pump solutions for customers with a diversified product line, excellent technical performance and comprehensive after-sales service. We hope this guide provides valuable references to help you find the optimal fluid transfer solution for your diaphragm pump purchasing needs.

Related Posts