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KBD Submersible Heavy Duty Slurry Pump
Description
TUSSU®KBD Series is a heavy-duty, submersible slurry pump designed for severe industrial, mining, and construction applications. Equipped with a high-chrome alloy impeller and an integrated built-in agitator, it smoothly fluidizes and pumps high-concentration sludges, sand, and abrasive bentonite without clogging.
Featuring a rugged cast iron body, dual silicon-carbide mechanical seals, and a top-discharge cooling design, the KBD series delivers exceptional wear resistance and reliable performance in the toughest dewatering and dredging environments.
Specification
- Capacity: up to 360 m3/h
- Head: up to 32 meters
- Power:4kW(5.5HP) to 22 kW (30HP)
- Power supply: 380V ± 10%, 50Hz or 60Hz
- Insulation class: F
- Protection class: IP68
- Water temperature: up to 40℃
- water depth: 15m
Features
- Protect against reverse phase, ensuring correct impeller rotation;
- Protect against open phase or impeller jam, thus prevent accidental damage;
- Automatically stop slurry pump in event of overload, abnormal voltage and recovery 5min later;
- Rapid assessment about the submersible pump operation and malfunction history.
- The slurry pump stops working at high temperature, and will automatically restart after cooling to the specified temperature;
Applications
- Mines, quarries, coal ore& slurries
- Civil engineering
- Sewage treatment plants
- General pumping purposes
Maintenance and Operation Guidelines
- No Prolonged Dry Running: Although designed with a top-discharge cooling frame, running the pump completely dry or in extremely low water for too long will overheat the motor and destroy the mechanical seals.
- Verify Correct Rotation: Always check the motor rotation arrow before full operation. Reverse rotation drastically drops flow rates and can loosen the impeller or agitator.
- Monitor Oil Chamber (Every 2,000 Hrs): Inspect the seal oil regularly. If the oil looks milky or watery, the mechanical seals must be replaced immediately to prevent terminal water damage to the motor.
- Prevent Large Debris Clogging: While the built-in agitator handles heavy sand and slurry, large rocks, ropes, or plastics can jam the impeller. Clear the steel strainer frequently.
- Never Pull the Cable: The KBD pump is heavy cast iron; always lift it by the handle or a dedicated chain. Pulling the power cable will breach the water seal and short the motor.
- Flush After Use: If pumping bentonite, cement, or thick mud, run the pump in clean water for a few minutes before shutting it down to prevent solids from hardening inside the casing.
More Product Details
The body of motor and pump is made of rigid cast iron forlong-lasting durability.
Greatly increased maximum submersion depth due to mechanical seal resistant to high pressure.
Both semi-open impeller and wear plate are made of high chrome alloy.
The hardness of this material is at least 58 HR, it’s more durable than other materials(ductile iron).
Effective motor cooling due to discharge channel cast as part of the motor housing. Space economy by a top outlet
Discharge 50mm (2″) to 150mm (6″). Motor l.5kW (2HP) to 15kW(20HP).
Hermetically sealed motor equipped build-in thermal protection for the power below 15kW
KBD Submersible Heavy Duty Slurry Pump Performance Curve:
KBD Submersible Heavy Duty Slurry Pump Technical Data:
| Model 50/60HZ | Outlet | Motor power | Rated current (400V) | Rated capacity | Rated head | Max capacity | Max head | impeller passage | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| kW | HP | m³/h | m³/min | m³/h | m³/min | ||||||
| KBD21.5 | 50 | 1.5 | 2 | 3.5 | 15 | 0.25 | 15 | 30/27 | 0.50/0.45 | 20/21 | 10 |
| KBD22.2 | 50 | 2.2 | 3 | 5 | 18 | 0.3 | 19 | 30 | 0.5 | 25/28 | 10 |
| KBD33.7 | 80 | 3.7 | 5 | 7.7 | 30 | 0.5 | 20 | 60/55 | 1.0/0.92 | 30 | 10 |
| KBD43.7 | 100 | 4.7 | 5 | 7.7 | 60 | 1 | 11 | 90 | 1.5 | 18 | 10 |
KBD Submersible Heavy Duty Slurry Pump Structure:
| Item No. | Part name | Material | Item No. | Part name | Material | |
|---|---|---|---|---|---|---|
| 01 | Hose coupling | Cast iron | 27 | Stator | ||
| 02 | Handle | Rubber&steel | 28 | Rotor | Shaft:AIS1420SS | |
| 05 | Upper cover | Cast iron | 31a | Bearing | Ball bearing | |
| 11 | Motor body | Cast iron | 31b | Bearing | Ball bearing | |
| 13 | Pump body | Cast iron | 33 | Motor protector | ||
| 14a | Impeller | High chrome alloy | 34 | Mechanical sea | Sic-Sic/Carbon-Sic(≤2.2kW) Sic-Sic/Sic-Sic(≤3.7kW) | |
| 14b | Agitator | High chrome alloy | 35 | Oil seal | ||
| 16 | Inlet plate | Ductile iron | 47 | Cable | ||
| 25 | Strainer | Steel |
FAQ:
What makes the KBD series suitable for “heavy-duty” slurry applications?
The KBD series is specifically engineered for severe environments. Its heavy-duty pedigree is built on a robust material configuration:
- High-Chrome Alloy (24-28% Cr): The impeller and agitator are made of high-chrome alloy, providing exceptional resistance against abrasive wear from sand, gravel, and sludge.
- Cast Iron Construction: The pump body, motor body, and upper cover are made of thick cast iron to withstand severe external impacts and high structural stress.
-
Built-in Agitator: The heavy-duty agitator forcefully mixes settled solids back into the liquid, fluidizing high-concentration slurries so they can be easily pumped out without clogging.
Q2: What is the maximum solids handling capability of the KBD pump?
While the exact size depends on the specific discharge diameter (2″,3″,4″,6″models), the KBD series is generally designed to handle slurries containing high concentrations of solid particles. Its high-chrome impeller and wide pump casing volute allow it to pass bentonite, silt, and small rocks smoothly.
Q3: What materials are used for the mechanical seals, and why?
To ensure maximum motor protection in abrasive environments, the KBD pump employs double mechanical seals:
- Models ≤2.2kW: Sic-to-Sic vs. Carbon-to-Sic.
-
Models ≥ 3.7kW (and higher): Sic-to-Sic vs. Sic-to-Sic.
Silicon Carbide (Sic) is utilized because its extreme hardness resists the scratching and erosion caused by fine slurry particles that might bypass secondary defenses.
Q4: Can the KBD pump run dry or operate in low-water levels?
The KBD series features a robust top-discharge, slim-line design, which utilizes the pumped liquid to cool the motor body as it flows upward. However, continuous dry running is not recommended as it can overheat the motor and damage the mechanical seals. The pump should remain submerged up to the recommended minimum liquid level during continuous duty.
Q5: What is the maximum permissible slurry temperature and pH range?
- Temperature: Standard models are rated for liquid temperatures up to 40°C (104°F). High-temperature customizations are available upon request.
- PH Range: The standard cast iron/high-chrome configuration is optimized for abrasive slurry with a pH range of 6 to 10. For highly acidic or highly alkaline chemical slurries, a full stainless steel series is recommended instead.
Q6: Does the pump require a separate control panel or built-in protection?
The KBD pump comes equipped with a built-in thermal/amperage motor protector (Item 33) that automatically shuts off the pump in case of phase failure, voltage drops, or impeller lock-ups. However, for industrial operations, we strongly recommend installing an external control panel with overcurrent protection, phase reversal protection, and water-leakage sensors to extend the pump’s lifespan.
Installation & Maintenance
Q7: How often should the oil in the seal chamber be checked/changed?
The oil seal chamber acts as a vital barrier protecting the motor from slurry ingress.
- Inspection: The oil should be inspected every 2,000 operating hours or every 6 months (whichever comes first).
-
Replacement: If the oil appears milky or contains water during inspection, the mechanical seals must be checked, and the oil should be replaced immediately. Use non-toxic turbine oil (e.g., ISO VG32).
Q8: What are the most common wear parts that need to be stocked?
Due to the abrasive nature of slurry pumping, the following components are considered consumable wear parts and should be kept in your inventory to minimize downtime:
- Impeller (Item 14a)
- Agitator (Item 14b)
- Mechanical Seal (Item 34)
- Oil Seal & O-Rings (Item 35)
-
Inlet Plate / Wear Plate (Item 16)
Q9: The pump is running but the discharge flow is too low. What should I check?
If you notice a sudden drop in flow rate or pressure, check the following in order:
- Rotation Direction: Ensure the motor is rotating in the correct direction (check the arrow on the casing). Reverse phases if necessary.
- Strainer Clogging: The steel suction strainer (Item 25) might be blocked by large debris. Clean the strainer.
- Impeller Wear: High abrasive wear might have increased the clearance between the impeller and the inlet plate. Inspect and adjust or replace the wear parts.
- Discharge Pipe Resistance: Check for kinks in the flexible hose or blockages in the pipe layout.
