The Heavy Duty Sludge Hose Pump is a positive displacement pump engineered for abrasive, viscous, and high-solid industrial fluid transfer. Operation relies on the peristaltic mechanism: a reinforced elastomer hose is compressed sequentially by rotating rollers or shoes mounted on a rotor.
Working Principle: Fluid enters the internal bore of the hose through restitution and moves forward via mechanical compression. The media remains entirely contained within the fluid path of the hose, preventing direct contact with moving mechanical components.
Core Advantages: Packless and seal-less architecture eliminates fluid leakage paths, mechanical seal flush systems, and gland water requirements. It provides up to a 9.5-meter dry self-priming capability and handles up to 80% solid concentrations without clogging or shear degradation.
Typical Media: Municipal sewage sludge, mineral thickener underflow, lime slurry, drilling mud, ceramic slip, corrosive chemical waste, and high-viscosity primary sludge.
Typical Industries: Wastewater treatment plants, mining and metallurgy, chemical processing, ceramic manufacturing, and pulp and paper mills.
Technical Specifications & Selection Guide
To select the correct pump model for your process, cross-reference operating parameters against the performance envelopes below.
|
Model Series |
Max Flow Rate (m3/h) |
Max Discharge Pressure (MPa / bar) |
Port Size (mm) |
Max Speed (RPM) |
Installed Motor Power (kW) |
|
HP-50 |
5.2 |
1.0 / 10 |
DN50 |
60 |
3.0 - 4.0 |
|
HP-80 |
18.5 |
1.0 / 10 |
DN80 |
50 |
7.5 - 11.0 |
|
HP-100 |
35.0 |
1.5 / 15 |
DN100 |
45 |
18.5 - 22.0 |
|
HP-125 |
60.0 |
1.5 / 15 |
DN125 |
40 |
30.0 - 37.0 |
Hose Material Options (Chemical & Abrasion Compatibility)
• Natural Rubber (NR): High resilience paired with superior resistance to mechanical wear and abrasion. Specified for non-corrosive mining tailings and abrasive slurries.
• EPDM: High resistance to polar chemicals, diluted acids, and continuous operating temperatures up to 100°C.
• NBR (Nitrile): Elastomer compound formulated for oily sludges, hydrocarbons, and petroleum-based waste streams.
• CSM (Hypalon): Recommended for aggressive oxidizing chemicals, concentrated acids, and high-chlorine media.
Engineering & Manufacturing Standards
Manufacturing and Quality Control
Manufactured via multi-layer winding of high-strength nylon cord embedded in specialized synthetic elastomer matrices, vulcanized under high pressure to prevent structural delamination under cyclic fatigue.
Pump housings are precision-machined on CNC horizontal boring mills to maintain exact tolerances on compression rollers, ensuring uniform wall stress distribution on the hose and maximizing operating life.
Every pump completes a 2-hour dry-run factory test, followed by a hydro-pneumatic pressure test at 1.5 times the rated working pressure prior to dispatch.
Application Analysis & Process Suitability
Direct Replacement for Progressive Cavity and Centrifugal Pumps
Progressive cavity pumps experience accelerated stator wear and rotor scoring when handling abrasive grit, while rubber-lined centrifugal pumps suffer severe impeller erosion at high RPMs. The hose pump eliminates stators, rotors, impellers, and mechanical seals entirely. The process fluid contacts only the interior wall of the replaceable hose.
Dry Running Protection: The pump operates continuously in a dry state without mechanical damage, thermal overload, or risk of component seizure.
Shear-Sensitive Fluid Handling: Low internal velocities and gentle compression guarantee that flocculated sludges and polymer solutions retain their structural integrity.
Vendor & Supplier Evaluation
When qualifying a manufacturing partner for industrial sludge pumps, verify the following baseline operational capabilities:
Traceability: Raw elastomer compound batches are traceable via unique identification stamps vulcanized directly onto the exterior surface of each replacement hose.
Inventory Readiness: Standard pump assemblies and replacement hoses are maintained in central warehouse stock for dispatch within 5 business days.
Engineering Support: Provision of full dimensional layout drawings, hydraulic performance curves, and 3D CAD models (STEP format) for plant piping integration.
Request for Quotation (RFQ) Checklist
Include the following data points in your inquiry to receive a complete technical proposal and commercial quotation within 24 hours:
Media Characteristics: Specific gravity, viscosity (cP), operating temperature (°C), percentage of solids, and maximum particle size (mm).
Hydraulic Requirements: Required flow rate (m3/h or GPM) and total dynamic head or discharge pressure (bar or PSI).
Installation Environment: Suction condition (flooded suction vs. lift height), continuous vs. intermittent duty cycle, and plant power supply standards (Voltage/Frequency/IP rating).
Frequently Asked Questions
Q: What determines the service life of the pump hose, and how is replacement performed?
A: Hose longevity is governed by discharge pressure, running speed (RPM), operating temperature, and media abrasiveness. Replacement requires draining the casing, removing the front cover plate, extracting the worn hose, and sliding in a new pre-lubricated hose without specialized lifting equipment. Downtime typically ranges from 30 to 60 minutes depending on pump size.
Q: Can this pump handle gas-entrained sludges without losing prime?
A: Yes. The positive displacement action creates a high vacuum during hose restitution, enabling self-priming lifts up to 9.5 meters and allowing the pump to pass air pockets and gas-entrained fluids without vapor lock.
Q: Is a variable frequency drive (VFD) required for operation?
A: A VFD is recommended for controlling flow output precisely, matching pump speed to fluctuating process loads, and executing smooth startup routines against high discharge heads.
Q: What lubrication fluid is required inside the pump housing, and how often must it be changed?
A: The housing uses a specialized silicone-based lubricant or food-grade glycerin solution (depending on model) which cools the exterior of the hose and minimizes friction against the compression rollers. Lubricant level checks are recommended every 500 operating hours, with complete fluid replacement every 2,000 hours.
Q: How does the pump prevent backflow when stopped?
A: The continuous occlusion of the hose by the compression rollers forms a positive mechanical seal against the inner wall, preventing siphonage or backflow when the drive motor is de-energized, eliminating the need for an external check valve.
Q: What certifications are available for hazardous or explosion-proof environments?
A: Motors and gearboxes can be supplied with ATEX (Zone 1 or Zone 2) or Class I, Division 1/2 explosion-proof certifications upon request to match plant safety classifications.
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