centrifugal pump Articles

  • Submersible Pumps vs. Self-Priming Centrifugal Pumps

    When selecting a centrifugal pump for bypass work, the first consideration should be NPSHR by the pump. Neglecting the NPSHR of the pump is the single most common mistake when choosing a self-priming or priming assisted pump. A function of the pump design requires part of the 33.9 ft (14.7 in.) available as further defined in this article. A centrifugal, and in a way submersibles, require part ...

  • The Versatility of Hydraulic Submersible Pumps

    Hydraulic submersible pumps offer flexibility and performance When determining a pump for an application, there are a number of factors to consider. Hydraulic submersible pumps are an option and give the added benefit of run dry capability, especially when electric powered pumps are of concern due to potential electrical hazards or other reasons, or diesel driven centrifugal pumps ...

  • Sanitary Pump Application

    Sanitary pumps involve the delivery of all human contact products such as pharmaceuticals, dairy products, beverages, foodstuffs, cosmetics, food additives, fine chemicals and the like. There are four basic types of sanitary pumps, centrifugal, volumetric, jet and air. Centrifugal ...


    By Adamant Valves

  • Horsepower on the pump curve

    Now that the head capacity relationship along the X and Y axes of the pump curve has been established in Part 1 of this series, the pump curve can be used to determine the amount of horsepower required to meet the head and capacity requirements for the job. Horsepower is a unit of power equal to 550 foot pounds per second or 746 watts. Water horsepower is the minimum power ...

  • Pumping at Subzero Temperatures

    Pumping of cryogenic (low-temperature) products is important for many applications, especially in the field of liquefied natural gas (LNG). The Sulzer J-unit is a special sealing system for cryogenic pumps. It was invented more than 60 years ago. The evolution of the J-unit design since then has been impressive and has now resulted in a recently filed patent application by Sulzer. ...


    By Sulzer

  • slurry pump impeller

    Impeller is a rotating component of a centrifugal pump, which transfers energy from the motor that drives the pump to the fluid being pumped by accelerating the fluid outwards from the center of rotation. ...


  • How to select the best Slurry Pump

    Slurry pump service life has the relationship with cost of production and production maintenance convenience. Selection unreasonable, may shorten the life of the slurry pump or adverse impact on production. So, bellow we will talk how to select suitable slurry pump to extend the service life and achieve maximum economic benefits. From design side, we analysis the three main factors affecting the ...


  • Multiphase pumps for energy-efficient water and wastewater treatment

    Multiphase pumps are unique products with outstanding features compared to conventional centrifugal pumps. The approach consists of using the pumps not only for transport of liquids but also for partial gas supply and as dynamic mixer for gas enrichment. Therefore this novel pump conception barely has ...

  • Pumps for energy-efficient water and wastewater treatment

    Multiphase pumps are unique products with outstanding features compared to conventional centrifugal pumps. The approach consists of using the pumps not only for transport of liquids but also for partial gas supply and as dynamic mixer for gas enrichment. Therefore this novel pump conception barely has something in common with a standard pump. Even the mode of ...

  • High Quality Pumps for Den Breejen Shipyard

    Since 1947 Den Breejen Shipyard in the Netherlands has produced high-quality vessels like passenger vessels, ferries, container and dry cargo ships, tankers, work boats and pontoons. River cruise vessels and ferries are specialties of Den Breejen and many DESMI pumps are onboard. DESMI Pumps are used for the following applications: ...


    By DESMI A/S

  • Pump with 900 foot head (that has hi-pressure, hi-flow, and hi-head pumping capacity)

    GRIFFIN 3 STAGE JET PUMPS These pumps are capable of delivering fl ow over 1,400 gallons per minute and head conditions up to 900 feet. They come equipped with hand-operated diaphragm primers as standard but can be equipped for automatic priming. Griffi n jet ...

  • Winter is coming: precautions to protect your pumps

    Now that we are running up to December, the weather in the Northern hemisphere is slowly getting colder and colder. Although Western Europe has been fortunate with a reasonably mild fall, we are expected to get a harsh winter this year, meaning that it is good to prepare for the cold season. Being pump people, this means that we need to take precautions to protect our ...


    By BBA Pumps

  • EDUR Multiphase Pumps for energy-efficient water and wastewater treatment

    Multiphase pumps are unique products with outstanding features compared to conventional centrifugal pumps. The approach consists of using the pumps not only for transport of liquids but also for partial gas supply and as dynamic mixer for gas enrichment. Therefore this novel pump conception barely has something in common with a standard pump. Even the mode of ...

  • Hydraulic Challenges of Designing for a High-Capacity and High-Head Pump Station

    King County is developing a new wastewater treatment plant to service a growing area of King and Snohomish Counties, Washington. To convey flows to the Brightwater treatment plant, the influent pump station (IPS) and a series of new tunnels and interceptors are being constructed. The plant IPS is located approximately 2.5 miles upstream and connected to the treatment plant via a tunnel containing ...

  • Raw water clarification by flotation with microbubbles and nanobubbles generated with a multiphase pump

    Raw water clarification by flotation was studied by injecting air into a centrifugal multiphase pump to generate microbubbles (MBs) and nanobubbles (NBs). Measurements of gas dispersion parameters were performed and optimal conditions were obtained using a pump pressure of 4 bar. Values showed a bubble Sauter diameter of 75 μm, an air holdup of 1.2%, a bubble surface area flux of 34 s−1 and an ...


    By IWA Publishing

  • Magnetic driven pumps in Molten sulphur service case study

    MD51EFDKR-3U88/06C with NORD SK12XZ-140TC and Reliance 2 HP, TEFC-XE motor Pumping Molten Sulphur is most challenging. Sulphur temperatures must be controlled within a 120-155o C range. Outside this temperature sulphur solidifies. Sulphur has a distinct odour and is highly corrosive in the presence of moisture. Where leakage from common packed style pumps was unacceptable, a ROTAN ...


    By DESMI A/S

  • Pump Contract for MARS Tanker. Logistic Support Ship - Case Study

    In 2010 following many months of dialogue with BMT Naval Architects the initial purchase enquiry for the supply of pumps and systems for the 4 new logistic support ships for the U.K RFA (Royal Fleet Auxiliary) was received from the Korean Shipyard DSME. DESMI participated in the tender process from the very beginning and had an open and honest dialogue with both the ...


    By DESMI A/S

  • Separation of emulsified crude oil in saline water by flotation with micro- and nanobubbles generated by a multiphase pump

    The flocculation–column flotation with hydraulic loading (HL, >10 m h−1) was studied for the treatment of oil-in-water emulsions containing 70–400 mg L−1 (turbidity = 70–226 NTU) of oil and salinity (30 and 100 g L−1). A polyacrylamide (Dismulgan, 20 mg L−1) flocculated the oil droplets, using two floc generator reactors, with rapid and slow mixing stages (head ...


    By IWA Publishing

  • Bell & Gossett introduces new hydronic pump selection criteria to maximize system efficiency

    Energy and maintenance expenses account for approximately 75 percent of the life-cycle costs of a centrifugal pump. With a growing emphasis on reducing energy consumption driven by government regulation and businesses seeking operational and financial efficiencies, HVAC system designers are seeking system solutions that maximize efficiencies while reducing costs. To address this demand and the ...

  • Mono nov’s compact mutrator solves sewage problem at park

    The services in Woodbank park are used by Stockport Metropolitan Borough Council staff working in the area, as well as members of the public using the sports facilities and visiting the park. The council wanted a simple and reliable alternative to handle raw effluent and enable them to link into a foul sewer some 500m away from the community services building. Engineers orignally opted to install ...

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