Diaphragm or Peristaltic: Best Dosing Pump Option for Wastewater ...

For chemical dosing in wastewater treatment, two types of pumps stand out, diaphragm and peristaltic hose pumps. Although they both perform well, they’re unique. The goal is to choose a pump designed for your company’s specific application.

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Pros and Cons of These Chemical Feed Systems

There is one important thing to consider when looking for a pump for chemical dosing that’ll perform effectively and reliably. Choose a supplier with experience and vast knowledge of the pump industry. A representative can provide you with even more pros and cons beyond those listed below.

Diaphragm

These pumps have a reciprocating diaphragm that creates suction to move liquids. Of the two types of pump systems, this one is more complex. Compared to a peristaltic pump, it has more valves. For that reason, you’ll need someone who’s relatively tech-savvy to operate it.

The diaphragm pump used for chemical dosing costs less to operate than the peristaltic hose type. Between these two systems, the diaphragm type is more energy-efficient.

The chemical feed system requires regular and proper maintenance. That’ll ensure the pump continues to perform optimally and prevent it from leaking.

To move chemicals and other potentially damaging liquids, the diaphragm chemical metering pump is the better choice. It’s also ideal for overcoming an issue of standing pressure within the flow line. For both peak performance and to prime the pump correctly, you want constant back-pressure.

A diaphragm pump used for chemical dosing does have two disadvantages. First, to achieve optimal performance, the chemical must be gas free. Second, it has the balls located on both the discharge and intake sides. So, if they get clogged, the pump will lose prime/suction capability, thereby compromising its maximum metering capability.

Peristaltic Hose Pumps

Peristaltic hose pumps are the second choice for wastewater treatment. This pump is easy to use. Unlike a diaphragm pump, this one doesn’t have check valves that can potentially clog. Therefore, it’s capable of transferring dirty and thick liquids.

Peristaltic dosing pumps have excellent dry suction capabilities. However, that doesn’t apply to a diaphragm pump. That’s just one more reason why industries choose this particular chemical dosing pump. Unfortunately, it too has a few disadvantages.

For instance, the hose is constantly gets squeezed, which eventually causes it to weaken and deteriorate. There is also a tremendous demand on the motor of a peristaltic type chemical dosing pump. That can cause two problems. First, pumping ability diminishes as time goes by. Second, it increases the risk of the hose rupturing.

Depending on the type of liquids pumped, a weakened or ruptured hose could result in a leak. If that happens, both the casing and equipment could sustain serious damage. The simplest way to avoid the issue is to use the proper hose and inspect it regularly.

Fortunately, manufacturers give the pump hoses distinct ratings, and they estimate the equipment’s life span. So, when replacing the hose, always pay close attention to these two factors.

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Superior Performing Pumps

In the industrial environment, the choice of the most suitable pumping system is crucial to guarantee efficiency, safety and precision in production processes. Among the most common solutions, dosing pumps and high-pressure systems represent two distinct categories, each with specific characteristics and different fields of application: while the former are appreciated for their high precision in flow regulation, the latter are distinguished by their ability to handle fluids at high pressures, even under extreme conditions. 

The question is, therefore, obvious: which of the two solutions is the most suitable for a given application? In order to answer this, one must first thoroughly investigate the fundamental differences between these two technologies, and then examine the key factors for making a considered and informed choice.

Dosing pumps: features and advantages

Dosing pumps are designed to deliver precise quantities of fluid into a system and ensure strict control of the flow and concentration of the substances used. This system is particularly suitable for sectors that require extreme precision, such as the chemical, pharmaceutical, food and water treatment industries.

The main advantages of dosing pumps are:

• high dosing accuracy, ideal for applications requiring controlled quantities of product;
• the possibility of automation, given by electronic adjustments that improve flow control;
• a great adaptability to different types of fluids, including aggressive or high-viscosity chemicals;
• improved energy efficiency, as they operate at relatively low pressures.

Dosing pumps are used for injecting chemical reagents, food additives and pharmaceuticals, ensuring that the quantities dispensed are always consistent with process specifications.

High pressure systems: features and advantages

High-pressure pumping systems are designed to generate - precisely - high pressures, enabling the handling of fluids under extreme operating conditions. This system is used in the petrochemical industry, energy production and surface treatment.

Like dosing pumps, high-pressure systems also offer a long list of advantages: 

• are capable of generating very high pressures, useful for applications such as industrial cleaning or spraying dense fluids;
• are resistant to high-viscosity fluids or fluids enriched with suspended particles;
• they have a robust construction, capable of working in harsh environments with less wear;
• they are versatile, so they can be used in various applications, from waterjet cutting to lubrication of mechanical components.

The use of high-pressure systems is essential in all those contexts where operating pressure is an indispensable factor for the smooth running of the process.

Why choose Mixtron products

A leader in industrial pumps and high pressure systems, Mixtron offers advanced solutions for both dosing and high pressure applications, guaranteeing reliability, precision and efficiency. Thanks to innovative technology and build quality, Mixtron pumps ensure optimal performance in every industry.

Relying on Mixtron offers a host of advantages:

• a wide range of customisable solutions to meet any production requirement;
• maximum precision and efficiency, thanks to advanced adjustment systems;
• high quality materials, to guarantee durability and resistance;
• specialised technical support, including pre- and after-sales assistance.

To find the best solution for your needs, you can contact Mixtron and request a personalised quote. A team of experts is always available to offer you targeted advice and help you make the best choice for your area of operation.

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