The Heavy Duty Slurry Hose Pump is a positive displacement industrial pump engineered for moving highly abrasive, viscous, and corrosive slurries without internal mechanical seals, glands, or check valves.
Working Principle
Fluid is entirely contained within a multi-layer reinforced elastomer hose fixed inside the pump housing. Two opposing mechanical shoes or rollers mounted on a rotating hub compress the hose sequentially. This continuous mechanical compression creates a vacuum on the suction port to draw media in, while positively displacing the fluid forward on the discharge side. The pumped medium contacts exclusively the inner wall of the hose and process flanges, completely isolating the pump mechanism from fluid contact.
Core Advantages
• Seal-Less Architecture: Eliminates mechanical seals, gland packings, and external flush water systems, preventing leakage paths and run-dry failures.
• Shear-Sensitive Fluid Handling: Low internal velocities and low rotational speeds (RPM) maintain the structural integrity of flocculated or shear-sensitive mixtures.
• Reversible Operations: Reversing the motor direction immediately reverses the flow path, allowing pipeline purging and blockage clearing without auxiliary valves.
• Predictable Wear Component: The heavy-duty reinforced hose is the only wetted wear part, replaceable on-site within 30 minutes without specialized lifting gear.
• Indefinite Dry-Running: Operates continuously in dry-run conditions without overheating or damaging internal elements.
Typical Media Handled
• Mineral tailings, sand slurries, and ore concentrates
• Ceramic slips, glazes, and refractory suspensions
• Lime mud, calcium carbonate, and drilling muds
• Aggressive acid solutions, ferric chloride, and industrial sludge
• Viscous chemical waste and high-solids wastewater effluent
Typical Industries
• Mining, Mineral Processing, and Metallurgy
• Chemical Processing and Petrochemical Refining
• Flue Gas Desulfurization (FGD) and Power Generation
• Municipal and Industrial Wastewater Treatment
• Ceramics, Pulp & Paper, and Construction Material Manufacturing
Technical Specifications & Performance Data
|
Model |
Max. Flow Rate (m³/h) |
Max. Discharge Pressure (MPa) |
Hose Inner Diameter (mm) |
Recommended Motor Power (kW) |
Process Flange Connection |
|
HP-25 |
1.8 |
1.6 |
25 |
1.5 - 2.2 |
DN25 (ANSI/DIN) |
|
HP-32 |
3.5 |
1.6 |
32 |
3.0 - 4.0 |
DN32 (ANSI/DIN) |
|
HP-50 |
9.0 |
1.6 |
50 |
7.5 - 11 |
DN50 (ANSI/DIN) |
|
HP-65 |
18.0 |
1.6 |
65 |
15.0 - 18.5 |
DN65 (ANSI/DIN) |
|
HP-80 |
30.0 |
1.6 |
80 |
22.0 - 30 |
DN80 (ANSI/DIN) |
|
HP-100 |
55.0 |
1.6 |
100 |
37.0 - 45 |
DN100 (ANSI/DIN) |
Hose Material Selection Guide
Hose longevity dictates overall pumping efficiency. Our hoses incorporate multi-layer nylon cord reinforcement embedded within high-grade elastomeric matrices, precision-machined on the outer diameter to ensure uniform compression mechanics.
Natural Rubber (NR):
Standard selection for abrasive mineral slurries, sand, and aggregate wash water. Features high resilience and fatigue resistance up to 80°C.
Nitrile Butadiene Rubber (NBR):
Formulated for oil-contaminated slurries, oily wastewater, and petroleum-based media. Withstands hydrocarbon swelling up to 80°C.
Ethylene Propylene Diene Monomer (EPDM):
Provides chemical resistance against mineral acids, caustic solutions, and oxidizing reagents up to 100°C.
Hypalon (CSM):
Built for aggressive mineral acids, strong oxidizing agents, and high ozone exposure.
Manufacturing, Quality Control & Factory Testing
Precision engineering ensures uniform hose compression tolerances and prevents internal backflow slippage.
Housing Machining: Pump bodies are cast in ductile iron or stainless steel and processed on CNC horizontal boring mills, maintaining a dimensional tolerance of ±0.02 mm on rotor track alignment.
Hose Compression Molding: Multi-stage vulcanization guarantees uniform wall thickness and prevents internal ply delamination under high mechanical stress cycles.
Hydrostatic Pressure Testing: Fully assembled pump units undergo a 1.5x working pressure hydrostatic test for 30 minutes prior to crating.
Performance Bench Testing: Flow output, power consumption, and mechanical vibration levels are verified on a closed-loop test rig compliant with ISO 9906 Grade 2B standards.
Web Design Note: Visual Proof Integration Insert factory media gallery here: (1) CNC horizontal boring mill machining pump housing; (2) Closed-loop hydraulic performance testing bench in operation.
Application & Selection Guide
To specify the correct industrial hose pump for engineering projects, evaluate the following parameters:
Solid Content and Particle Size: Verify that maximum solid particle size does not exceed 20% of the hose inner diameter, and sharp-edge solid concentration remains within standard wear limits.
Discharge Head Calculation: Total head must account for static elevation, pipeline friction loss, and media specific gravity. Standard units handle up to 1.6 MPa (16 bar).
Viscosity and Speed Limits: High-viscosity fluids demand lower rotational speeds (RPM) to maintain volumetric efficiency and prevent inlet starvation.
Duty Cycle: Differentiate continuous (24/7) from intermittent operations to compute thermal load limits and required lubricant volume inside the housing casing.
Frequently Asked Questions
Q: What causes premature hose failure in a heavy-duty slurry pump?
A: Premature failure typically results from selecting an incompatible elastomer for specific chemical properties, operating the pump above maximum rated discharge pressure, or driving the unit at an excessive rotational speed that exceeds thermal limits. Sticking to specified fluid compatibility and RPM caps maximizes hose service life.
Q: How is the fluid flow rate regulated during active operation?
A: Flow output is directly linear to pump speed. Integrating a Variable Frequency Drive (VFD) enables precise speed modulation from 10% to 100% of rated capacity, matching varying process requirements without altering discharge pressure.
Q: Do hose pumps require external seal flush water or gland cooling?
A: No. The system is seal-less and glandless. A measured volume of specialized food-grade glycerin or silicone lubricant is maintained inside the casing solely to reduce frictional heat between the shoes and the hose exterior. No external flush water supply or drainage connection is needed.
Q: Can this pump handle continuous dry-running conditions safely?
A: Yes. Because fluid containment is isolated within the hose and no mechanical seals rely on process liquid for boundary lubrication, the pump runs dry indefinitely without scoring internal components or overheating.
Q: What is the procedure and timeframe required to replace a worn hose?
A: Hose replacement requires no heavy hoisting tools. Maintenance technicians isolate suction and discharge valves, drain the casing lubricant, remove the front cover plate, disconnect the flange clamps to pull out the old hose, insert the new pre-machined hose, and refill the lubricant. The entire operation takes roughly 25 to 45 minutes.
Q: What quality documentation is delivered with each pump shipment?
A: Every delivery package includes a factory inspection certificate, ISO 9001 compliance records, material test reports (MTR) for metallic wetted components, and individual hydraulic performance curves logged during factory bench tests.
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