• Suction Specific Speed (Part One) | Pumps & Systems

    Dec 17, 2011· Suction specific speed, like specific speed, is not a speed at all. It is an index number, or "yardstick." It is based on the NPSHR of a centrifugal pump, normally the 3 percent head drop NPSHR and normally at its best efficiency point (BEP).

  • Specific Speed Pumps - Engineering ToolBox

    Note! When comparing pumps and their documentation - be aware of the units used. Typical values for specific speed - N s - for different designs in US units (US gpm, ft) radial flow pump design - 500 < N s < 4000 - typical for centrifugal impeller pumps with radial vanes - double and single suction. Francis vane impellers in the upper range

  • Pump Terms and Definitions

    Radial flow – Pumps of this type with single inlet impellers usually have a specific speed below approximately 90 (4500) and, with double suction impellers, a specific speed below approximately 135 (7000). This type is commonly referred to as a centrifugal pump.

  • Portable Pumps with custom designed ... - CPE Systems

    The Variable Speed High Proof Alcohol Pump and the Barrel Filling Portable Pump are two examples of such systems. If you have specific production needs, give us a call - we can help! All portable pumps come standard with Tri-clamp connections, but we can supply other connection types by special order.

  • Centrifugal pumps: which suction specific speeds are ...

    @article{osti_7018728, title = {Centrifugal pumps: which suction specific speeds are acceptable}, author = {Hallam, J L}, abstractNote = {Suction specific speed is an important consideration when purchasing or analyzing centrifugal pumps. There is a direct correlation between this parameter, pump reliability and maintenance expenses. This article demonstrates that in a large Gulf Coast oil ...

  • Reading a Centrifugal Pump Curve | Pumps & Systems

    Feb 19, 2018· Choosing the correct centrifugal pump for your application is critical for maximizing long-term performance. ... The system curve represents the system head in your specific application at various flow rates and is calculated by determining the system's static head and friction loss. ... Editor's note: In 2016, Grundfos and Pumps & Systems ...

  • Centrifugal Pumps - an overview | ScienceDirect Topics

    Centrifugal pumps usually have carbon based rotors, and can have high volumetric capacity, although the characteristic curves shown in Figure 16.15(a) show the output of a rather small pump with a similar characteristic curves to the EM pump PG450 used for making castings (Figure 16.15(c)).

  • Modeling Flow Characteristics of a Low Specific-Speed ...

    May 16, 2019· 50% of their electricity on pumping systems [4]. The centrifugal pump is one of the most common pump types. Centrifugal pumps induce flow through piping networks by first adding kinetic energy to a fluid and then converting that kinetic energy into pressure energy. The kinetic energy is created by the impeller [Figure 1], a set of rotating ...

  • Pump specific speed by CENTRIFUGALPUMP.COM

    biggest pump it has ever built whose specific speed is within + or - minus 5% of the calculated Ns (or, Ns of 2160 to 2390.) It found a smaller but similar pump type, a 28x30x30 pump, with a specific speed of 2200. Using this pump size as a model, and applying the …

  • The Affinity Laws - Pump Laws - Centrifugal Pumps

    The Affinity Laws – Pump Laws. The centrifugal pump is a very capable and flexible machine. It is not necessary to design specific pump for each specific system. The performance of centrifugal pump can be changed by the change in impeller diameter or its rotational speed. The affinity laws, or the pump laws, state how such changes influence the performance of the pump.

  • 8 Common Pump Misapplication Problems | Pumps & Systems

    Dec 15, 2015· Depending on the specific speed of the pump impeller and other design factors, the air entrainment limit on most standard centrifugal pumps is 12 percent. The performance will be affected as the air entrainment percentage increases, and this phenomenon eventually will stall out the pump.

  • Centrifugal Pumps | PDF | Pump | Horsepower

    Centrifugal Pumps. Figure 11. Pump and System Curve. ... centrifugal pump (at a given speed and flow rate), the head produced is a characteristic of the pump. It is a constant value. However, the delta P produced is not constant. ... Specific Volume The volume of one pound of liquid.

  • Centrifugal Pump Efficiency — Specific Speed | Pumps & Systems

    Feb 22, 2012· Early centrifugal pump design was heavily influenced by turbine technology during the mid to late 1800s. Specific speed was first applied to centrifugal pumps in the latter 1800s and was a modified version of one developed for water turbines. Many pump designers see specific speed as the most important contributor to centrifugal pump design.

  • Pump Systems | Department of Energy

    Pump Systems. Dramatic energy and cost savings can be achieved in pump systems by applying best energy management practices and purchasing energy-efficiency equipment. Use the software tools, training, and publications listed below to save energy in pump systems.

  • Types of Centrifugal Pumps: Classification & Working ...

    Jul 04, 2021· The figure below shows the flow path through these types of pumps as well as their specific speed ranges. Different designs of centrifugal pumps according to the specific speed ranges (Reference: ksb.com) The specific speed of a pump is expressed by the following equation: N_{s}=frac{nQ^{frac{1}{2}}}{H^{frac{3}{4}}}

  • API 610 Pump Packages & Packaged 610 Pump Systems - Pumpworks

    PumpWorks has decades of experience in the design, engineering, and assembly of API 610 centrifugal pump packages and complex packaged systems. This includes everything from small 5hp single-stage units to 8,000hp high-speed multi-stage units.

  • Specific Speed

    Specific Speed Pumps & Systems is a specialized engineering technology firm that provides technical services in the area of pumps and process systems. Since 2007 Specific Speed Pumps & Systems has provided engineering services and support to pump end users, pump manufactures & OEM's, pump distributors and global engineering consultancies.

  • What is specific speed in a centrifugal pump? - Quora

    Pump Specific Speed is one of the several dimensionless parameters used in designing of pumps. Pump designers like to use dimensionless numbers, because his allows them to analyze and compare pump performance and efficiencies regardless of their s...

  • Centrifugal Pumps | Pumps & Systems

    Centrifugal pumps are the most common pump, used in a wide variety of applications, especially water. They include one or more impellers that rotate and pull the fluid through. Impellers can be trimmed to change head or flow to enhance efficiency. They are not commonly used in non-Newtonian fluids.

  • Prosoli - Centrifiugal Pumps Overview

    Specific Speed • Specific Speed is used to describe the geometry (shape) of a pump impeller. –Performance of Centrifugal pump is expressed in terms of pump speed, total head and, required flow. Specific Speed is calculated using the formula below at pump's BEP. –Formula: Specific Speed (N s)= N √Q N: speed of pump (rpm), H (3/4)

  • Centrifugal pump system tips, do's and dont's

    30. Consider higher speed centrifugal pumps. The standard motor induction speeds that are most often considered for pumps are 900, 1200, 1800 and 3600 rpm. The specific speed of a pump depends on its speed and the higher the specific speed the higher the efficiency (see the chart in item 28). By choosing a higher speed pump the pump …

  • CENTRIFUGAL PUMP SELECTION, SIZING, AND …

    4.1 COVERAGE CHART FOR CENTRIFUGAL PUMPS A coverage chart (see Figure 4-2) makes it possible to do a preliminary pump selection by looking at a wide range of pump casing sizes for a specific impeller speed. This chart helps narrow down the choice of pumps that will satisfy the system requirements. 4.2 PERFORMANCE CURVE CHART

  • Useful information on specific speed and suction specific ...

    is the specific speed (often shown as 'S' when used with US units) is the rotation or shaft speed of the impeller (rpm) is the flow rate, per impeller eye, at the BEP (US units: gpm; SI units: m 3 /hr); flow is taken for the largest impeller diameter available for a pump and should be halved for double inlet pumps): is the differential head at the BEP (US units: ft; SI units: m)

  • Achieving High Pump Efficiency | Pumps & Systems

    Dec 17, 2011· The major influences on centrifugal pump selection efficiency are specific speed (NS), pump size, NPSHA and R, viscosity of the fluids pumped, temperature, specific gravity and the pump type selected to meet the system conditions. The Hydraulic Institute has charted the expected efficiency of different types of pumps at different specific speeds.

  • Suction Specific Speed (Part One) | Pumps & Systems

    Dec 17, 2011· Suction specific speed, like specific speed, is not a speed at all. It is an index number, or "yardstick." It is based on the NPSHR of a centrifugal pump, normally the 3 percent head drop NPSHR and normally at its best efficiency point (BEP).

  • Specific Speed Pumps - Engineering ToolBox

    Note! When comparing pumps and their documentation - be aware of the units used. Typical values for specific speed - N s - for different designs in US units (US gpm, ft) radial flow pump design - 500 < N s < 4000 - typical for centrifugal impeller pumps with radial vanes - double and single suction. Francis vane impellers in the upper range

  • Pump Terms and Definitions

    Radial flow – Pumps of this type with single inlet impellers usually have a specific speed below approximately 90 (4500) and, with double suction impellers, a specific speed below approximately 135 (7000). This type is commonly referred to as a centrifugal pump.

  • Portable Pumps with custom designed ... - CPE Systems

    The Variable Speed High Proof Alcohol Pump and the Barrel Filling Portable Pump are two examples of such systems. If you have specific production needs, give us a call - we can help! All portable pumps come standard with Tri-clamp connections, but we can supply other connection types by special order.

  • Centrifugal pumps: which suction specific speeds are ...

    @article{osti_7018728, title = {Centrifugal pumps: which suction specific speeds are acceptable}, author = {Hallam, J L}, abstractNote = {Suction specific speed is an important consideration when purchasing or analyzing centrifugal pumps. There is a direct correlation between this parameter, pump reliability and maintenance expenses. This article demonstrates that in a large Gulf Coast oil ...

  • Reading a Centrifugal Pump Curve | Pumps & Systems

    Feb 19, 2018· Choosing the correct centrifugal pump for your application is critical for maximizing long-term performance. ... The system curve represents the system head in your specific application at various flow rates and is calculated by determining the system's static head and friction loss. ... Editor's note: In 2016, Grundfos and Pumps & Systems ...

  • Centrifugal Pumps - an overview | ScienceDirect Topics

    Centrifugal pumps usually have carbon based rotors, and can have high volumetric capacity, although the characteristic curves shown in Figure 16.15(a) show the output of a rather small pump with a similar characteristic curves to the EM pump PG450 used for making castings (Figure 16.15(c)).

  • Modeling Flow Characteristics of a Low Specific-Speed ...

    May 16, 2019· 50% of their electricity on pumping systems [4]. The centrifugal pump is one of the most common pump types. Centrifugal pumps induce flow through piping networks by first adding kinetic energy to a fluid and then converting that kinetic energy into pressure energy. The kinetic energy is created by the impeller [Figure 1], a set of rotating ...

  • Pump specific speed by CENTRIFUGALPUMP.COM

    biggest pump it has ever built whose specific speed is within + or - minus 5% of the calculated Ns (or, Ns of 2160 to 2390.) It found a smaller but similar pump type, a 28x30x30 pump, with a specific speed of 2200. Using this pump size as a model, and applying the …

  • The Affinity Laws - Pump Laws - Centrifugal Pumps

    The Affinity Laws – Pump Laws. The centrifugal pump is a very capable and flexible machine. It is not necessary to design specific pump for each specific system. The performance of centrifugal pump can be changed by the change in impeller diameter or its rotational speed. The affinity laws, or the pump laws, state how such changes influence the performance of the pump.

  • 8 Common Pump Misapplication Problems | Pumps & Systems

    Dec 15, 2015· Depending on the specific speed of the pump impeller and other design factors, the air entrainment limit on most standard centrifugal pumps is 12 percent. The performance will be affected as the air entrainment percentage increases, and this phenomenon eventually will stall out the pump.

  • Centrifugal Pumps | PDF | Pump | Horsepower

    Centrifugal Pumps. Figure 11. Pump and System Curve. ... centrifugal pump (at a given speed and flow rate), the head produced is a characteristic of the pump. It is a constant value. However, the delta P produced is not constant. ... Specific Volume The volume of one pound of liquid.

  • Centrifugal Pump Efficiency — Specific Speed | Pumps & Systems

    Feb 22, 2012· Early centrifugal pump design was heavily influenced by turbine technology during the mid to late 1800s. Specific speed was first applied to centrifugal pumps in the latter 1800s and was a modified version of one developed for water turbines. Many pump designers see specific speed as the most important contributor to centrifugal pump design.

  • Pump Systems | Department of Energy

    Pump Systems. Dramatic energy and cost savings can be achieved in pump systems by applying best energy management practices and purchasing energy-efficiency equipment. Use the software tools, training, and publications listed below to save energy in pump systems.

  • Types of Centrifugal Pumps: Classification & Working ...

    Jul 04, 2021· The figure below shows the flow path through these types of pumps as well as their specific speed ranges. Different designs of centrifugal pumps according to the specific speed ranges (Reference: ksb.com) The specific speed of a pump is expressed by the following equation: N_{s}=frac{nQ^{frac{1}{2}}}{H^{frac{3}{4}}}

  • API 610 Pump Packages & Packaged 610 Pump Systems - Pumpworks

    PumpWorks has decades of experience in the design, engineering, and assembly of API 610 centrifugal pump packages and complex packaged systems. This includes everything from small 5hp single-stage units to 8,000hp high-speed multi-stage units.

  • Specific Speed

    Specific Speed Pumps & Systems is a specialized engineering technology firm that provides technical services in the area of pumps and process systems. Since 2007 Specific Speed Pumps & Systems has provided engineering services and support to pump end users, pump manufactures & OEM's, pump distributors and global engineering consultancies.

  • What is specific speed in a centrifugal pump? - Quora

    Pump Specific Speed is one of the several dimensionless parameters used in designing of pumps. Pump designers like to use dimensionless numbers, because his allows them to analyze and compare pump performance and efficiencies regardless of their s...

  • Centrifugal Pumps | Pumps & Systems

    Centrifugal pumps are the most common pump, used in a wide variety of applications, especially water. They include one or more impellers that rotate and pull the fluid through. Impellers can be trimmed to change head or flow to enhance efficiency. They are not commonly used in non-Newtonian fluids.

  • Prosoli - Centrifiugal Pumps Overview

    Specific Speed • Specific Speed is used to describe the geometry (shape) of a pump impeller. –Performance of Centrifugal pump is expressed in terms of pump speed, total head and, required flow. Specific Speed is calculated using the formula below at pump's BEP. –Formula: Specific Speed (N s)= N √Q N: speed of pump (rpm), H (3/4)

  • Centrifugal pump system tips, do's and dont's

    30. Consider higher speed centrifugal pumps. The standard motor induction speeds that are most often considered for pumps are 900, 1200, 1800 and 3600 rpm. The specific speed of a pump depends on its speed and the higher the specific speed the higher the efficiency (see the chart in item 28). By choosing a higher speed pump the pump …

  • CENTRIFUGAL PUMP SELECTION, SIZING, AND …

    4.1 COVERAGE CHART FOR CENTRIFUGAL PUMPS A coverage chart (see Figure 4-2) makes it possible to do a preliminary pump selection by looking at a wide range of pump casing sizes for a specific impeller speed. This chart helps narrow down the choice of pumps that will satisfy the system requirements. 4.2 PERFORMANCE CURVE CHART

  • Useful information on specific speed and suction specific ...

    is the specific speed (often shown as 'S' when used with US units) is the rotation or shaft speed of the impeller (rpm) is the flow rate, per impeller eye, at the BEP (US units: gpm; SI units: m 3 /hr); flow is taken for the largest impeller diameter available for a pump and should be halved for double inlet pumps): is the differential head at the BEP (US units: ft; SI units: m)

  • Achieving High Pump Efficiency | Pumps & Systems

    Dec 17, 2011· The major influences on centrifugal pump selection efficiency are specific speed (NS), pump size, NPSHA and R, viscosity of the fluids pumped, temperature, specific gravity and the pump type selected to meet the system conditions. The Hydraulic Institute has charted the expected efficiency of different types of pumps at different specific speeds.