Centrifugal Pumps

DistributionNOW is a trusted distributor of centrifugal pumps with a wide variety of options to choose from. From industrial process pumps to municipal wastewater pumps, to high-pressure multistage centrifugal pumps for your production site.

We sell centrifugal pumps that are known for their reliability, efficiency, and durability. With a wide variety of models to suit any of your project needs, we're sure to have the perfect pump for your application. Our team is always ready to help you select the right pump for your needs, so don't hesitate to reach out to us to learn more about our centrifugal pump offerings.

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Browse Products & Services

DNOW provides both sales and service/repair for a wide wide variety of centrifugal pump and pump packages, offered through our Flex Flow, Odessa Pumps and Power Service divisions. Use the filter below to see all DNOW products or those specialized by Flex Flow, Odessa Pumps and Power Service.

Preventive Maintenance

Odessa Pumps, a DistributionNOW company focuses on proactive and preventative maintenance programs to help extend the life of your equipment. Our program protects your investment and can save you money on major repairs down the line. With a custom maintenance program today, we can help you get the most out of your pumps.

Our factory-trained technicians arrive in fully-equipped service trucks, complete with one-ton chassis with service bed, electric-hydraulic hoist, air compressor, gas torch, cell phone and specialty tools.

Our field personnel are current on safety and health regulations and participate in monthly training sessions, such as H2S training, gas monitoring, first aid and lockout-tagout procedures. This ensures that they are able to provide the best possible service to our customers.

DNOW has Preventive Maintenance Services for Pumps
DNOW sells Multistage Centrifugal Horizontal Surface Pumps

Why DNOW is the centrifugal pumps distributor of choice

There are many different kinds of centrifugal pumps available on the market, each with its own advantages and disadvantages. At DNOW, we have a wide variety of pump types to choose from, so that you can find the best option for their needs.

We offer a wide variety of pumps designed for efficient operation and maximum uptime no matter the operating temperature, pressure, or flow capacity. Our pumps may be used across a wide range of industrial markets including oil and gas, chemical, food and beverage, municipal, power, mining and minerals, primary metals, pulp and paper and more.

With a variety of options to choose from and expert support, we are confident that we can meet your needs. Contact us today to learn more about our centrifugal pumps and how we can help you!

Technical resource library

Centrifugal pumps are the most popular type of pump for fluid transfer, due to their simple design and efficient operation. Using centrifugal force, these pumps move fluids by rotating an impeller within the pump housing. Here you can find tools, tables, presentations and videos to help you make informed decisions about which centrifugal pump is right for your needs.

resources

FAQs

Centrifugal pumps rely on rotational energy transmission to function. Fluid is supplied to an impeller via a nozzle, causing the impeller to rotate rapidly. Some of the kinetic energy generated by the impeller's blades is imparted to the fluid, which then enters a volute casing or diffuser. Here, the fluid's velocity decreases while its pressure increases.

There are a variety of centrifugal pump configurations that are well-suited for different industrial applications. The most popular variants include:

  1. The close-coupled centrifugal pump does not require a separate coupling, as the motor is directly mounted to the pump. This makes the pump more compact and cost-effective than the long-coupled centrifugal pump.
  2. For heavy-duty and continuous use applications such as water circulation and cooling, long-coupled pumps are more suited.
  3. Magnetic drive pumps are ideal for handling hazardous, corrosive, flammable and/or explosive fluids and other toxic chemicals because they are magnetically coupled. This design difference also means that there is no friction loss, wear or noise, making them more cost-effective and efficient.
  4. Mechanically sealed pumps are more powerful and can work in tougher conditions because they have a stronger connection. They can also handle solids and high-temperature fluids better than other types of pumps. Centrifugal pumps with mechanic seals are best for industrial and marine applications such as food and beverage processing, seawater transfer, etc.
  5. Vertical inline pumps have a vertical shaft and are radial split and overhung. Vertical inline pumps are typically only selected for specific applications where space is an issue.
  6. Horizontal pumps are more popular because they don't require as much maintenance and are easy to install. They also let you get to the internal parts easily and can be connected to external accessories such as turbines and electric motors.
  7. Multistage centrifugal pumps have multiple impellers that are installed and rotated on the same shaft. As the flow progresses from one impeller to the next, the head increases by the same amount, resulting in much higher pressure capabilities. This means that multistage centrifugal pumps are typically selected for applications where high-pressure capabilities are required, such as transferring fluids that must be moved over a very large distance.
  8. Single-stage centrifugal pumps have a simple structure and are designed for applications where a large flow rate is more important than pressure capabilities. They are one of the most popular centrifugal pump designs and can be supplied in various materials and design variations to meet specific application requirements.
  9. Vertical immersion pumps have an elongated shaft that separates the motor from the pump. The pump impellers are immersed in the fluid, but the pump motor stays outside the fluid. This pump design is ideal for emptying wells, sumps, reservoirs and tanks.

ANSI (American National Standards Institute) pumps are high-quality single-stage centrifugal pumps that were originally designed for use in the chemical process industry, but can now be used in other industries.

API (American Petroleum Institute) pumps are single and multistage centrifugal pumps that are required for high pressure and high-temperature applications within the oil and gas industry.

A centrifugal pump must have four basic parts to function properly. These parts include:

  • The housing encloses the pump mechanism and provides support for the bearings.
  • The impeller is a rotating vane that creates a centrifugal force, which moves the fluid. As fluid enters the impeller it is directed into the vanes of the impeller where it picks up speed and energy. When the fluid leaves the vanes and enters the casing, the velocity of the fluid equals the rotational speed of the impeller.
  • Diffusers and volutes are two types of centrifugal pump casings. They are stationary vane that help slow down on entry of the flow of fluid and due to fluid pressure direct it into the outlet port. 
  • The shaft is the central unit in a centrifugal pump’s rotor system. It bears the impellers, mechanical seal and the bearings of the pump. The shaft acts as a rigid framework from which pump operations can be conducted.
  • Bearings installed on the shaft help support it and other rotary elements. They also absorb radial and axial forces and help keep the shaft aligned for peak efficiency. Different types of bearings are used based on the pump's operating conditions.
  • The mechanical seal or packing is a crucial pump component that keeps the liquid from leaking out along the shaft. It is housed in the casing cover at the back of the casing. Different types of seals can be used depending on the process variables.
  • The motor provides the power to rotate the impeller.