5 Top Reasons Why Many Industries Choose Positive Displacement Pumps
The decision to prefer a positive displacement pumpover a centrifugal pump is one that isn’t always clear. They each feature varying behaviours and if unfamiliar with them, it could be challenging to understand how the first option could fit into your application or process.
They are a choice that is more efficient than their centrifugal counterparts in certain instances. If any of the applications or conditions listed below happens to be in your process or application, then you should probably use this type of pump.
- High viscosity
Centrifugal pumps have problems pumping viscous fluids, turning quite inefficient at modest levels. Conversely, their positive displacement counterparts have no issues moving thick fluids. They can pump viscous fluids a lot better than centrifugal pumps.
- Low flow
Often, centrifugal pumps are run off their BEPs when lower flows are needed, much to the detriment of the pumps. This could bring about excessive consumption of energy, general poor performance, or even damage to the pump. Nevertheless, their positive displacement counterparts are well-suited for such conditions, offering consistent fluid flow at any given pump speed. If you are attempting to get the flow or pressure you require by operating any centrifugal pump off its BEP, then its positive displacement counterpart might be much better for you.
3. Metering
Positive displacement pumping equipment is an excellent option for metering applications and functions. They offer consistent flow, enabling them to easily and conveniently meet varying project requirements. When it comes to the positive displacement pump in Australia, some of the most common kinds you will see being used for metering purposes include;
• Peristatic.
• Diaphragm.
• Piston.
• Gear.
• Plunger.
- High-pressure requirements
Positive displacement pumping equipment is excellent for applications that need high pressure, with some of their models even producing more than 1,000psi (2,300ft). As a result of the design of the pumps, nevertheless, if they are kept in operation against a discharge valve that is closed, they will keep building up the pressure till the line ends up bursting, the pump is ultimately damaged, or even both. This should give you an idea of the kind of high pressure that these pumps can generate and offer.
- Shear-sensitive liquids
Generally, centrifugal pumps function at significantly higher speeds in comparison to their positive displacement counterparts. The higher speeds can better shear fluids, thus making them a poor option for liquids such as latex paint and tomato paste. On the other hand, their positive displacement counterparts, functioning at significantly lower speeds, could be a lot gentler on products and are typically preferred in these kinds of applications. This is among the foremost reason why manufacturing companies that offer beverages, cosmetics, and some household items prefer these kinds of pumps.
The centrifugal pump and the positive displacement pump feature significantly different behaviours. Understanding their varying behaviours could help you greatly when it comes to making sure that you choose the most appropriate one for your application. Experts and professionals are always ready to offer suggestions, recommendations, as well as advice that will help you in making the most informed decision possible. All that you have to do is contact them.
