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    Case Studies

    Horse Racetrack bets on Flygt for pump station design

    United States

    The 200-acre Monmouth Park Racetrack in Oceanport, New Jersey, opened on July 30, 1870, just three miles from the seashore town of Long Branch. The racetrack is supported by a series of barns and other support facilities that house in excess of 500 horses during track operations. At one time, the stormwater from the barns in the racetrack backstretch area drained directly into Branchport Creek impacting the water quality of the receiving waters downstream from the racetrack. Read On

    Circular wastewater lift station


    A 54,000-acre service area in a major city in Texas required assistance to handle a projected 50% increase in population and aubsequent increase in wastewater processing demands.   Read On

    Flygt Submersible Pumps in Sims Bayou

    United States

    Sims Bayou begins near Missouri City, Texas, and meanders northeast until it reaches Buffalo Bayou. As a result of the Federal Flood Damage Reduction project, the bayou has recently undergone significant flood control improvements. Citizens residing in neighborhoods adjacent to Sims Bayou now have a lower risk of flooding than in the past and are benefiting tremendously from the project. Read On

    Easy-to-raise submersible pumps reduce downtime


    Cleaning out debris from long-shaft pumps in a sludge handling system at a paper mill in the USA was taking up to one week per pump. By replacing them with submersible units, the entire operation could be completed within a couple of hours. Download to read the whole story. Read On

    Circular stormwater pump station


    Challenge One of the largest airports serving France required a stormwater treatment plant to handle the inflow from a large gravity sewer collecting water from the runways. Solution The pump station is set in a circular deep caisson and includes both the dry weather inflow and stormwater sumps. The storm sump includes a circular inlet baffle chamber for the stabilization and de-aeration of incoming storm flows and is equipped with 12 large Flygt CP 3602-935 submersible pumps that are capable of discharging a total of 16 m³/s (254,000 US gpm). The pumped effluent is discharged to a grit chamber and then to a dual lagoon collecting system before it is treated through large sand filters, and cleaned water is then transferred to the nearby river. Flygt has designed pump stations for thousands of installations around the world. Engineering expertise and years of experience have resulted in the success of these installations. Read On

    Pump station with cleaning function


    Challenge Eighteen Flygt pump stations transport wastewater at a popular recreational and amusement area in central Stockholm. One of the pump stations handles restaurant wastewater containing fats, oils and grease. The liquefied oil and grease in high-temperature dishwashing water solidifies after transportation to the pump station. This caused severe odor problems and grease build-up on the pump station walls, sump water surface, Flygt CP3102 pumps, guide bars, level sensor and other pump station equipment, increasing the risk of failure in the station. Expensive maintenance procedures had to be carried out every two to three months in order to remove accumulated sludge and clear the station of greasy buildup. Solution Our engineers recommended the installation of a Flygt APF cleaning function through an electronic device for automatic pump sump cleaning. The controller automatically initiates pump operation in order to drain sump water to the lowest possible level, thereby removing grease and dirt laying on the surface of the water. This enables the pump station to operate for a significantly longer time without requiring any sludge removal Read On

    Expansion of a desalination plant


    Challenge One of Australia’s largest cities was running short of fresh water and needed a major expansion of its desalination facility. One hurdle was to transfer the seawater to the plant. A new pump station would be required. The challenge was the large number of pumps, 16 in all, required to do the job. This number is beyond the scope of handbook designs. Solution The consulting engineer for the city commissioned Flygt to help develop a problem-free design using CFD. The CFD study highlighted potential problems with sedimentation and was instrumental in developing appropriate solutions. Read On

    Circular stormwater and wastewater pump station


    Challenge Situated on an estuary of a major river, one of the largest cities in China has an average annual rainfall of 1100 mm (43 in). The three-month typhoon season, usually with heavy rains from the Pacific Ocean, leaves behind long-term seepage of water on the streets and/or floods households due to inadequate drainage systems and an obsolete pump station from the 1950s. Drainage is important to the city’s downtown district, which are comprised of high-end residential complexes, municipal administrative buildings, foreign consulates and bustling shopping centers. Solution The city’s largest pump station for combined sewage and rain/stormwater handling underwent an major upgrade, which includes nine Flygt PL 7121/965 propeller pumps and four Flygt CP 3501/835 wastewater pumps. All pumps are arranged in a circular chamber and share the same water sump. The effective inside diameter of the sump is 39 m (128 ft). Used for rain/stormwater handling, the Flygt propeller pumps have an operating range of between 2.5 and 3.5 m³/s (40,000 to 55,000 US gpm) and a head of 8 to 13 m (26 to 43 ft); the highest efficiency of 83% is obtained at a head of 10.2 m (34 ft). The sewage pumps have an operating range of between 1.0 and 1.4 m³/s (16,000 to 22,000 US gpm) and a head of 7.8 to 12.5 m (26 to 41 ft); the best efficiency of 84% is obtained at 11 m (36 ft). Read On

    Sewage and stormwater pump stations


    Challenge The revival of one of Britain’s largest commercially unexploited land areas called for multi-phase construction of two large pump stations. One pump station was to provide drainage for a combined flow of sewage and surface water, yet ensure separation of surface water for discharge directly into a nearby river. The other was to provide adequate drainage for stormwater for the continuing redevelopment of the area.  Solution For the first pump station, Flygt developed a complete mechanical and electrical package that will cost-effectively pump sewage and surface water for the entire redeveloped area. Designed to separate foul and surface water flows into two drainage networks, the system consists of two Flygt CP 3300 drainage pumps and 10 Flygt CP 3500 stormwater pumps in a twin level wet well with siphonic discharge into a surge chamber. This configuration with its circular sump design provides a total station capacity of 12 m3/s (190,000 US gpm) at a pump station that is 50% smaller than standard stations. It ensures that surface water can be efficiently and economically discharged directly into the river without overloading the local sewage works as well as drastically reduced construction, installation, operating and maintenance costs. For the second pump station, we designed a circular pump station with 18 radially positioned submersible pumps that discharge siphonically into a central chamber above the inlet chamber. Installed inside a wet well 28 m (90 ft) deep in parts are 16 Flygt CP 3311 pumps for handling stormwater and two Flygt CP 3300 drainage pumps. With a total capacity of 8 m3/s (125,000 US gpm), this station is one of the world’s largest using submersible technology. For both pump station solutions, we conducted and analyzed start calculations to ensure reliable starts, longlasting equipment and optimal hydraulic performance. Read On

    Large capacity circular wet well


    Very deep, large capacity and limited footprint: these are common demands by customers for their pump stations designs. Recently, two such pump stations were needed in the US. Read On

    An underground pump station – fit for a king


    Stockholm’s largest pump station is situated some meters below a site which was once a 17th century palace in the middle of the city. The large flows and central location demanded reliable pumps and no disturbance of the location which is close to the Royal Palace and a popular central park, since any break down would have devastating consequences. An upgrade with Flygt pumps made this possible. Download to read the whole story. Read On