The series of intelligent pressure boosting system BWS-HY is
developed based on PDI control technology, to control the pump
pressure within a certain range according to the water consumption
with features of complete functions, reliable quality, stable operation
and easy maintenance.
BWS, the abbreviation of Building Water System or Best Water
System, implies the LEO’s ambition to build up the image of best
quality product range for water supply system in the market.
BWS series includes WG Non-negative Water Supply System, wX
Water Non-negative Supply System, HY Constant Water Supply
System and ZY Boosting Water Supply System. Together with WQ
sewage pumps, XBD firefighting pumps, LPP in-line pumps and LEN
end suction pumps, we have full range to satisfy the applications of
secondary water supply, drainage, fire-fighting and HVAC.
The complete device is composed from a pump unit, a pressure tank,
a pressure sensor, PDI and accessories. If necessary, auxiliary pumps
or pressure tanks can be added in the device.
To transfer clean water with liquid temperature between
0°C and 40°C
Applicable in water supply and drainage for factories，
mines, municipal facilities as well as field irrigation, etc.
New unique design with ergonomic feature
Portable and compact pump frame
High quality motor with excellent performance and long
Impeller designed with high efficient hydraulic system
Low fuel consumption
Anti-rust cast iron impeller and diffuser
Max.suction：8 m / 120 s
Inlet/outlet: 25 mm/38 mm
Displacement: 42.7 cc
Rated speed: 7500 rpm
For water supply from wells or reservoirs
For domestic use,for civil and industrial applications
For garden use and irrigation
Maximum fluid temperature up to + 500C
Maximum sand content：0.25%
Maximum immersion: 80m
Minimum well diameter: 4″
Motor and Pump
Rewindable motor or full obturated screen motor
Equip with start control box or digital auto-control box
NEMA dimension standards
Curve tolerance according to ISO 9906
Can be used to transfer clean water or other liquids similar to
water in physical and chemical properties.
Suitable for industrial use and urban water supply, domestic water
supply, high rise buildings, long distance water transfer and
related auxiliary equipment etc.
Cast iron pump body and support under special anti-rust treatment.
AISI 304 shaft.
Max. liquid temperature: +40oC.
Max. suction: +8 m.
C&U bearing Motor with copper winding.
Built-in thermal protector for single phase motor.
Insulation class: F.
Protection class: IPX4.
Max. ambient Temperature: +40oC.
IE 2 motor (Three phase, power ≥ 0.75kW)
Can be used to transfer clean water or other liquids similar to water
in physical and chemical properties
Suitable for small living water supply，automatic water sprinkler system，
small air conditioner system or supporting equipment etc
With 2 L pressure tank for automatic operation
Special anti-rust treatment
Brass impeller AISI 304 shaft
Max.liquid temperature：+ 40℃
Max. suction: 9m
Type GS single stage double suction centrifugal pump have high efficiency and energy saving character. With wide Performance range, superior hydraulic performance and reasonable structure, the series of pumps have high efficiency and reliability, low cavitations and cost for maintenance.
GS series products are mainly used for deliver fresh water or other liquids similar to fresh water, the solid content is not more than 80mg/L, it also can deliver sewage, sea water and muddy water with little particle with adopting of anti-corrosion and anti-friction material. The products are widely applicable to supply & drainage system or cooling & circulating system for iron & steel, petrochemical, thermo power plant and mines industries, etc. and running water system for cities, circulating water for heating system, irrigation projects and various water conservation projects, fire systems, shipbuilding industry as well.
◆ Capacity：135~38000 m3/h
◆ Head：12~205 m
◆ Temperature：≤80℃，cooling structure will be adopted for bearing, the material of casing & cover is QT500-7≤150℃
◆ Speed：370~2970 r/min
◆ Suction diameter：150~1800 mm
The type HD、HDS、HDQ、HDC pumps are based on independent research and development technology which are especially suitable for varying level and high head applications. They are used for sending water at normal temperature or liquid which is similar to water in physical, chemical properties, generally not more than 50°C. For special liquid, please contact us to get solution for that.
Application field Municipal engineering, hospital, farmland irrigation and drainage, water conservancy project, industrial water supply system, building, hotel, dock.
Scope of performance
◆ Capacity: 900-27000 m3/h
◆ Head: 5-20 m
◆ Discharge diameter: 350-above 1400 mm
To transfer clean water with liquid temperature between 0℃and 40℃
Application in water supply and drainage for factories, mines,
municipal facilities as well as field irrigation, ect.
All new design with ergonomic feature
High lift series with LEO high efficient hydraulic system
Reliable 4-stroke gasoline engine with low fuel consumption
and high quality crankshaft
Portable，durable and compact pump frame
Durable sealing system with special mechanical seal
Optional outlet selection
Anti-rust cast iron impeller and diffuser
Max.power：3.8 HP / 5.4 HP
Displacement: 219 cc/306 cc
Rated speed: 3600 rpm
Suitable for transferring liquids of low viscosity, non-
inflammable and non-explosive, not containing solid
particles or fibers.
Water supply&drainage for high-rise buildings,
filtration and transfer at waterworks, pressure boosting
in main pipe.
Washing and cleaning systems, boiler feeding, cooling
water circulation, water treatment systems, auxiliary
system, support equipment.
Ultra-filtration systems，reverse-osmosis systems，distillation
systems, separators, swimming pools.
Agricultural irrigation: sprinkler irrigation, drip-feed irrigation.
Low viscosity, non-inflammable and non-explosive liquids
not containing solid particles or fibers. The liquids must not
chemically attack the pump materials. When pumping liquids
with a density or viscosity is higher than that of water, a motor
with a higher output power rating shall be used.
Liquid temperature：-20℃〜+ 120℃
Flow ranges: 0.7-240 m3/h
Liquid pH value：4-10
Max.ambient temperature：+ 40℃
Max. operation pressure: 33 bar
Altitude: up to 1000 m
IE 2 motor (IE 3 motor optional)
Standard voltage ：50Hz 1×220V / 3×380V
Max.ambient temperature：+ 40℃.Ambient temperature
above 40℃or installation at altitude of more than 1000 meters
above sea level require the use of an oversize motor. Because
of low air density and poor cooling effects, the motor output
power P2 will be decreased. See the picture.
In such cases, it may be necessary to use a motor with a higher
output power rating.