TUSSU®KBS Series Heavy-Duty Submersible Slurry Pumps with Agitator for Tough Construction & Mining Dewatering

In deep foundation works, tunnel dewatering, and mining operations, standard drainage pumps fail prematurely when abrasive solids settle in the pump casing. The KBS Submersible Slurry Pump series is purpose-built to overcome this specific bottleneck. Equipped with a built-in high-chrome alloy agitator, a slow-running 4-pole motor, and a top-discharge slimline design, the KBS series continuously suspends settled solids before extraction, ensuring clog-free operation under the most punishing civil engineering conditions.

Engineered for High-Solid Slurry and Bentonite Transfer

Unlike standard dewatering pumps that rely purely on suction velocity, the KBS series incorporates a mechanical agitator mounted directly below the inlet plate. This agitator fluidizes settled mud, bentonite clay, and heavy sand, mixing them into a treatable slurry that passes easily through the wide 30mm impeller passage.

The top-discharge, semi-interior flow path keeps the motor continuously cooled by the pumped medium. This engineering choice allows the unit to operate safely even during low-water level skimming operations in narrow cofferdams or deep pits, avoiding the common motor burnout risks associated with side-discharge pumps.

Technical Material & Structural Specifications

Component longevity in abrasive environments is determined entirely by material science. The KBS series utilizes premium metallurgy designed to withstand extreme hydraulic erosion and mechanical stress:

Impeller & Agitator (Item 14a/14b): Cast in High Chrome Alloy to ensure maximum wear resistance against sand, quartz, and gravel erosion.
Inlet Plate (Item 16a): Also featuring High Chrome Alloy to maintain critical tolerances against abrasive wear, preserving long-term pump efficiency.
Rotor Shaft (Item 28): Machined from heavy-duty AISI 420 Stainless Steel for high torsional strength and superior corrosion resistance in acidic or alkaline drainage water.
Mechanical Seal (Item 34): Premium SiC-SiC / SiC-SiC dual-face mechanical seals. For heavy units exceeding 15kW (such as the 200KBS415 and 200KBS422), Tungsten Carbide (Tc-SiC) upgrades are applied to survive the extreme pressure spikes encountered in deep-well slurry dewatering.

Item No.	Part name	Material	Item No.	Part name	Material
01	Hose coupling	Cast iron	25	Strainer	Steel
02	Handle	Steel	27	Stator
05	Upper cover	Cast iron	28	Rotor	Shaft:AISI420SS
07	Bearing house	Cast iron	31a	Bearing	Ball bearing
11	Motor body	Cast iron	31b	Bearing	Ball bearing
13	Pump body	Cast iron	34	Mechanical seal	Sic-Sic/Sic-Sic Tc-Sic/Sic-Sic( > 15kW)
14a	Impeller	High chrome alloy	35	Oil seal
14b	Agitator	High chrome alloy	47	Cable
16a	Inlet plate	High chrome alloy
16b	Inlet plate	Cast iron

Performance Matrix and Model Selection

The KBS range offers flexible power configurations spanning from 4 kW to 22 kW, tailored for distinct discharge diameters and head requirements:

80KBS44 (4 kW / 5.5 HP): 80mm outlet, delivering a rated capacity of 60 m³/h at 10m head. Optimized for light mud pits and localized construction dewatering.
100KBS46 (6 kW / 8 HP): 100mm outlet, rated at 90 m³/h at 10m head (Max capacity 144 m³/h). Ideal for standard site mud tanks and bentonite handling.
150KBS49 (9 kW / 12 HP): 150mm outlet, rated at 100 m³/h at 15m head (Max head 21.5m). Perfect for larger excavation sites and tunnel drainage.
200KBS415 (15 kW / 20 HP): 200mm large outlet, delivering a massive 200 m³/h rated flow at 16m head (Max capacity 372 m³/h).
200KBS422 (22 kW / 30 HP): The flagship unit featuring a Star-Delta starting method (compared to Direct-On-Line for smaller models) to safely manage inrush current. It delivers a 24m rated head and can reach a Max Head of 32m, making it the primary choice for deep shaft mining and high-lift gravel extraction.

Model 50/60HZ	Outlet	Motor power		Starting Method	Rated current (380V)	Rated capacity		Rated head	Max capacity		Max head	impeller passage
		kW	HP			m³/h	m³/min		m³/h	m³/min
KBS44	80	4	5.5	D.O.L.	10.2	60	1.00	10	99	1.65	14.8	30
KBS46	100	6	8	D.O.L.	13.8	90	1.50	10	144	2.40	16.9	30
KBS49	150	9	12	D.O.L.	19.5	100	1.67	15	192	3.20	21.5	30
KBS415	200	15	20	D.O.L.	30.1	200	3.33	16	372	6.20	22	30
KBS422	200	22	30	Star-Delta	42.0	200	3.33	24	360	6.00	32	30

Hydraulic Efficiency Across Dual-Frequency Requirements (50Hz / 60Hz)

50Hz Synchronous Speed (1450 rpm): Designed for stable, low-shear velocity pumping, keeping wear coefficients minimal while providing continuous high-torque mud suspension.
60Hz Synchronous Speed (1750 rpm): Optimized for international construction standards requiring deeper dynamic head lifts and high-volume extraction rates without overloading the electric motor stator.

Critical Field Applications

The KBS Submersible Slurry Pump thrives where standard drainage units burn out within days. Primary structural applications include:

Bentonite Slurry Recovery: Extracting and circulating heavy bentonite fluids from deep diaphragm walls, pile driving, and micro-tunneling boring machines (TBM).
Civil Construction Dewatering: Clearing deep foundation excavations, basement pits, and subway tunnel channels fouled with sand, silt, and concrete runoff.
Mining & Aggregates Sediments: Pumping high-density thickener underflow, tailing recovery ponds, and settling basin sludges.