EBARA PACKAGED BOOSTER SETSBOOSTER SETS & ACCESSORIES

BOOSTER
DEFINITION AND USE OF BOOSTER PUMP SETS

In situations in which a municipal water mains is lacking or insufficient for the proper operation of the services, one must install a booster pump set to provide acceptable pressure and flow rates to even in the most unfavorable services. Booster pump sets are used wherever there is a need to increase the pressure, or to pressurize a water circuit. EBARA booster pump sets are small automatic systems with 2 or more pumps operating in parallel, designed to provide a simple and reliable solution to the most common requirements for maintenance of water supply pressure for apartment buildings, hotels, centers, offices and schools as well as providing auxiliary service in industrial and agricultural applications. They stand out for their robust construction, compact size, excellent efficiency and silent operation

  • Ebara booster pump sets are available in three different operation modes.
    • Constant Speed
    • Variable Speed with one common VFD per set
    • Variable Speed with individual VFD per pump
  •  No. of Pumps per set
    • 2 Pumps (1 working + 1 standby/assist)
    • 3 Pumps (2 working + 1 standby/assist)
    • 4 Pumps (3 working + 1 standby/assist)
  • Constant Speed

When water is demanded, it is drawn from the tank. This demand of water resulting the pressure drop in the system, when pressure drops to the set pressure, pressure switch trips and start the first Pump. If the pump’s flow rate is lower than demand, the circuit pressure will continue to drop until it trips the pressure switch, thus starting the second pump. When water consumption reduces, the system pressure rises, thus opening the pressure switches sequentially and shutting off the pumps one by one.

  • Variable Speed with one common VFD

When water is demanded, it is drawn from the tank. This demand of water resulting the pressure drop in the system, when pressure drops to the set pressure, first pump starts and the speed is controlled through inverter. If the pump’s flow rate is lower than demand, the circuit pressure will continue to drop and the system responds by increasing the pump’s speed. If first pump reaches its maximum speed and demand is still in excess of its delivery, second pump will start at maximum speed. The speed of first pump is immediately adjusted so as to establish the operating pressure. If the system pressure even drops further, the first pump is once again running at maximum speed, the third pump will be started and so on for all pumps in the unit.
If the water demand is reduced, the system pressure tends to increase resulting in the reduction of speed of first pump to maintain the operating system pressure. At this point, one of the pump which is running at maximum speed will be stopped, while speed of first pump will be adjusted to maintain the system pressure. As the pressure continues to increase due to reduced demand, once the minimum speed of first pump is reached then first pump will be stopped.

  • Variable Speed with individual VFD

When water is demanded, it is drawn from the tank. This demand of water resulting the pressure drop in the system, when pressure drops to the set pressure, first pump starts and the speed is controlled through inverter. If the pump’s flow rate is lower than demand, the circuit pressure will continue to drop and the system responds by increasing the pump’s speed. If first pump reaches its maximum speed and demand is still in excess of its delivery, second pump will start at variable speed. The speed of these two pumps will be modulated to restore the system pressure. If the system pressure even drops further and both the pumps are running at maximum speed, the third pump will be started and so on for all pumps in the unit.If the water demand is reduced, the system pressure tends to increase resulting in the reduction of speed of all pumps to restore the system pressure. If the pump’s flow rate is greater than demand, the circuit pressure will continue to increase and the system responds by decreasing the speed of the pumps until it reaches the minimum speed setting. At this point, third pump will be stopped while the speed of other two pumps will be modulated to maintain the system pressure. This continues in sequence as the demand continues to fall, until the unit is completely stopped

EBARA booster pump sets can be used, in their standard versions, for civil, industrial and agricultural applications, as follows:

  • Building service
  • Water lifting and handling
  • A/C
  • Heating
  • Irrigation
  • Washing systems
    The conveyed fluid must be: clean, potable, ground or mixed water, free of solid or fibrous suspensions and aggressive chemical substances. The units must be installed under cover, protected from the weather and freezing.
  • Conveyed water temperature 0 – 50°C
  • Ambient operating temperature 0 – 40°C, no higher than 1000 m above sea level.

EBARA is a trusted brand worldwide with its experience and superior technologies.