How Pitot Tube Pumps Work: Working Principle and Technology

Pitot tube pumps use a rotating casing and stationary pitot tube to convert fluid velocity into pressure. They are used in selected high pressure low flow industrial applications where engineering evaluation is required.

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Technical illustration of pitot tube pump working principle

What Is a Pitot Tube Pump?

A pitot tube pump is a centrifugal pump technology that uses fluid velocity and a stationary collection device to generate discharge pressure. It is commonly reviewed for industrial services where high pressure and controlled low flow are required.

Rotating Casing

The rotating casing accelerates the liquid and creates the velocity field required for pressure conversion.

Stationary Pitot Tube

The stationary pitot tube collects high velocity liquid from the rotating casing.

Collection Chamber

The collection area receives the captured fluid and directs it toward the discharge path.

Pressure Conversion Section

The pressure conversion section helps convert velocity energy into useful discharge pressure.

Pitot Tube Pump Working Principle

Step 1: Fluid Enters Rotating Casing

Process liquid enters the casing and begins moving with the rotating chamber.

Step 2: Rotating Casing Increases Fluid Velocity

The rotating casing accelerates the liquid, increasing velocity energy within the pump.

Step 3: Stationary Pitot Tube Captures High Velocity Fluid

The stationary pitot tube captures the moving fluid from the rotating casing.

Step 4: Velocity Energy Converts Into Pressure

Velocity energy conversion produces discharge pressure for the industrial process.

Why Pitot Tube Pumps Are Used for High Pressure Low Flow Applications

Pitot tube pumps are often evaluated as a high pressure low flow pump option when the process requires low flow high head requirements, stable industrial process operation, or a different approach from conventional pump selection.

Low Flow High Head Requirements

Selected high pressure low flow pump applications require controlled flow while maintaining high discharge pressure or head.

Industrial Process Applications

Process services may require careful pump selection based on duty cycle, control method, and operating limits.

Difficult Liquid Conditions

Fluid properties such as viscosity, entrained gas, solids, or contamination should be reviewed for each application.

Replacement Evaluation Projects

Pitot pump technology may be reviewed in a Roto-Jet replacement evaluation or a multistage pump replacement review.

Pitot Tube Pump vs Traditional Centrifugal Pump Technology

Pressure Generation

Pitot Tube Pump: Velocity energy conversion.

Traditional Centrifugal Pump: Impeller-based pressure generation.

Low Flow Performance

Pitot Tube Pump: Reviewed for selected high pressure low flow applications.

Traditional Centrifugal Pump: Suitability depends on pump curve, impeller design, and operating point.

Maintenance Considerations

Pitot Tube Pump: Maintenance review depends on configuration, seals, and fluid conditions.

Traditional Centrifugal Pump: Maintenance depends on bearings, seals, impeller condition, and service environment.

Application Evaluation

Both technologies should be selected based on flow rate, pressure, fluid properties, suction conditions, materials, and site requirements.

Engineering Considerations

Pitot tube pump selection should be based on complete operating data. Engineers should review the process requirements before confirming configuration, materials, and performance expectations.

Flow Rate

Normal, minimum, and maximum flow requirements.

Pressure / Head

Required discharge pressure, total head, and suction conditions.

Fluid Properties

Fluid name, chemistry, vapor pressure, and compatibility requirements.

Temperature

Normal and maximum operating temperature.

Viscosity

Viscosity at operating temperature when available.

Gas or Solid Content

Entrained gas, solids, contamination, or slurry details.

Materials

Metallurgy, elastomers, seals, and project standards.

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Applications

Frequently Asked Questions

What does the rotating casing do in a pitot tube pump?

The casing rotates with the liquid and increases its tangential velocity. This moving liquid provides the velocity energy that the stationary collection element uses for pressure recovery.

What is the function of the stationary pitot tube?

The stationary pitot tube intercepts part of the high-velocity liquid inside the rotating casing. Its passage slows and directs the liquid so that velocity energy is converted into discharge pressure.

How is fluid velocity converted into discharge pressure?

Liquid first gains velocity from the rotating casing. As the stationary pitot tube captures and decelerates that flow, part of the kinetic energy is recovered as pressure energy.

How does this principle differ from a conventional centrifugal pump?

A conventional centrifugal pump normally uses a rotating impeller followed by stationary passages to develop pressure. A pitot tube pump rotates the liquid-filled casing and uses a stationary pitot tube for collection and pressure recovery.

Why is complete application data still required when the working principle is known?

The operating principle alone does not establish hydraulic suitability, suction margin, material compatibility, seal selection, or power demand. Selection should be confirmed against flow, pressure, fluid properties, temperature, suction conditions, and the required operating range.

Need Help Selecting a Pitot Tube Pump?

Send your operating conditions, fluid properties, and application requirements for engineering review.