KBJ KB Double Impeller Centrifugal pump Supplier in Bangladesh
KBJ and KB series are double impeller centrifugal pumps made by [maker, country], with two impellers in one casing that add head for clean-water boosting and transfer. Techno Bangla Creation supplies them in Bangladesh with engineer-checked sizing, installation and after-sales support.
What Is a Double Impeller Centrifugal Pump?
A double impeller centrifugal pump has two impellers inside one casing, working in series on one motor shaft. Water passes through both, and each adds pressure, so the pump reaches higher head than a single-impeller model of similar size. Techno Bangla supplies the KBJ and KB series for clean-water transfer and pressure boosting in Bangladesh.
It is not a sludge pump and not a submersible. It is built for clean water, and a brass impeller is not meant for sewage or abrasive solids. For liquids with solids, see our self-priming open impeller pump.
- Flow of 40 to 550 L/min and head of 20 to 90 m
- Three-phase motors from 1.5 to 15 HP
- Brass impeller and a rated suction lift of 7 m
- Sizing, installation and after-sales support in Bangladesh
KBJ and KB Pump Specifications
- Series
- KBJ, KB
- Type
- Double impeller centrifugal pump
- Capacity
- 40 ~ 550 L/min (about 2.4 ~ 33 m³/hr)
- Head
- 20 ~ 90 m (about 2 ~ 8.8 bar, or 196 ~ 883 kPa)
- Motor Power
- 1.5 ~ 15 HP (about 1.1 ~ 11.2 kW)
- Power Supply
- 3-phase, 50 Hz, 420 V as listed in our catalogue (confirm the motor nameplate voltage)
- Suction Lift
- 7 m (about 23 ft)
- Impeller
- Brass
- Suitable Liquid
- Clean water without abrasive particles
Each model covers part of this range. Exact flow, head, motor and seal depend on the model, so send us your duty point and our engineers will confirm the right size.
How a Double Impeller Pump Works
- Prime the PumpFill the casing and suction line with water so atmospheric pressure can push water in.
- First Impeller AcceleratesThe motor spins the first impeller, which throws water outward and builds pressure.
- Second Impeller Adds HeadWater passes into the second impeller, which adds more pressure in series.
- Casing Turns Speed Into PressureThe casing slows the water and converts its speed into discharge pressure.
- Water Reaches Your LinePressurised water flows to the tank, booster line or process. A flow meter can track the output.
Key Benefits
One compact pump can replace a larger single-impeller unit when the job needs pressure.
- Higher head from one pump, up to 90 m on this series
- Medium flow up to 550 L/min covers many factory utility lines
- Rated 7 m suction lift for tanks and sumps below the pump
- Brass impellers are commonly chosen for clean-water duty because they resist rust
- Three-phase motors from 1.5 to 15 HP suit factory supply
- Local sizing, installation and after-sales support from Techno Bangla
Is a Double Impeller Pump Right for You?
Choose This Pump When
- You need 20 to 90 m of head at medium flow
- The liquid is clean water without sand or solids
- The water level is within about 7 m below the pump
- A three-phase supply is available at your site
- You want one compact pump instead of two in series
Choose Another Pump When
- The liquid holds sludge or solids. Use a self-priming open impeller pump
- The water sits deep or in a sump. See our submersible pump
- The liquid is acidic or chemical. Ask us for a suitable material
- You need metered chemical feed. Use a dosing pump
- You need very high flow at low head
Where Double Impeller Pumps Are Used
Clean-water duty that needs more pressure than a single-impeller pump gives.
- Factory Utility Water
- Pressure Boosting
- Tank Filling and Transfer
- Filter Feed in WTP
- Cooling Water Circulation
- Boiler Feed Transfer
- Washing and Spray Lines
- Irrigation and Horticulture
How to Choose the Right Double Impeller Pump
Share these details with our engineers and we will recommend a model and motor size.
- Flow and total head. Add static lift, delivery height and pipe friction to get total head. Pick a pump whose best efficiency point sits near your duty point. A common guide is to run between 70 and 120% of best-efficiency flow.
- Suction layout. Water can rise at most about 10.3 m at sea level, and practical lift is nearer 8 m. Keep the suction pipe short, airtight and not smaller than the pump inlet.
- Liquid quality. Brass-impeller pumps are meant for water free of abrasives. Add a strainer if your tube-well water carries sand.
- Power supply. Bangladesh low-voltage three-phase supply is commonly given as 400 V, 50 Hz. Match the motor nameplate to your supply and add overload and phase protection.
- Motor size and running hours. Hydraulic power in kW is about flow (m³/hr) × head (m) ÷ 367. For 12 m³/hr at 60 m that is about 2 kW. At an assumed 50% pump efficiency the shaft needs near 4 kW, so a 5 to 7.5 HP class motor. Use the datasheet curve to confirm.
Frequently Asked Questions
What do KBJ and KB mean on a double impeller pump?
KBJ and KB are model-series names for two-impeller centrifugal pumps. Always confirm the maker, country of origin and datasheet for the exact model before ordering, because the same names appear in several catalogs.
How much does a double impeller pump cost in Bangladesh?
Retail listings for 1.5–2 HP twin-impeller pumps run in the tens of thousands of taka, and three-phase industrial sizes cost more. Price depends on HP, series, maker and materials. Send your flow, head and power supply and our engineers reply with a free quotation. Replace this with Techno’s own price range.
Why does my double impeller pump run but give low pressure?
The usual causes are an air leak on the suction line, an unprimed casing, a blocked strainer or foot valve, a worn impeller, or wrong motor rotation on a three-phase pump. For rotation, compare the motor direction with the arrow on the casing, and swap two phase leads if it is reversed. Our engineers can diagnose your setup.
Do I need a foot valve and strainer on the suction pipe?
This pump is not self-priming, so a foot valve helps it hold its prime, and a strainer protects the impellers if your water carries sand. Keep the suction line short and airtight.
Is there a single-phase version?
Small sizes of two-impeller pumps are often offered in single-phase 230 V and three-phase versions, while larger sizes are three-phase. Tell us your supply and size and we confirm which version is available.
Do I need a pressure tank or inverter for pressure boosting?
A pump alone can feed a line on demand, but frequent starts wear the motor. A pressure tank or a variable-speed drive evens out the pressure and reduces starts. Our engineers size the combination for your line.
How can I get a quotation for a KBJ or KB pump?
Send your required flow (L/min or m³/hr), total head, suction lift, liquid type and power supply by phone or email. Our engineers reply with a free quotation and recommend a KBJ or KB model. We also supply installation and after-sales support in Bangladesh.
