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Sand & Dredge Pumps
BBP Sand & Dredge Pumps — AMG/AWN Series for Coarse-Aggregate, Slurry & Dredging Service
Sand and gravel pump, dredging pump systems for application duty cycles where a routine slurry pump falls short. AMG (7 gravel/sand models, 36–2,800 m³/h) and AWN (11 dredging models, 200–1,200 mm suction) efficiently power mining tailings, river sand, hydraulic back fill and harbor dredging—ISO audited operations, fully vertically integrated from casting through testing.
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Why Standard Slurry Pumps Fail on Coarse Aggregate — and How AMG/AWN Solves It
Coarse-aggregate wear breaks general-purpose slurry pumps in three predictable ways: oversized particles wedge between impeller and casing, abrasion opens the wet-end clearances, and high gland pressure draws solids into the seal cavity. AMG and AWN pumps are designed specifically for this failure profile — not adapted from general slurry duty.
Sand and gravel pumping sits at the boundary of slurry, dredging, and hydraulic transport — with one defining constraint: solids are coarse, abrasive, and continuous. The AMG series handles 60–310 mm solid passage on a single-stage cantilever frame; AWN scales the same architecture to 200–1,200 mm suction for true dredging duty.
Four failure modes AMG/AWN engineers around
Particle wedging
wide impeller channels and a generous casing volute pass stones up to 310 mm without screening (AMG 16/14T(U)-AMGH).
Abrasion wear
27% high-chrome A05-equivalent wet-end parts at ≥600 Brinell deliver 6–12 months service life in mining tailings, compared to 3–6 months for standard cast steel.
Gland intrusion
side-sealing vanes on the impeller back face plus optional expeller seal reduce solids ingress to the packing cavity.
Maintenance time
front-access wet-end design (Concentrated Maintenance) lets impeller and liner be replaced without removing the bearing assembly or motor.
Solution Summary — At a Glance
| Specification | AMG (Gravel/Sand Pump) | AWN (Dredging Pump) |
|---|---|---|
| Outlet diameter | 100–300 mm | 200–1,200 mm |
| Flow capacity | 36–2,800 m³/h | up to 14,000 m³/h |
| Head range | 5–92 m | up to 90 m |
| Max solid passage | 60–310 mm | up to 250 mm |
| Drive options | V-belt / gearbox / flexible coupling | Gearbox / direct drive |
| Sealing | Gland packing / mechanical / expeller | Gland / mechanical-stuffing combined / expeller |
| Wear-part alloy | 27% high-chrome (A05 equivalent), ≥600 Brinell · rubber-lined option for fine-particle service | |
Two product lines, one buying framework: AMG handles coarse aggregate and abrasive sand-gravel mixtures; AWN covers high-volume dredging where suction lift and continuous duty matter most.
Procurement teams often ask the wrong opening question — “is there a cheaper alternative?” — and miss the right one: does the failure profile match the duty cycle? If your slurry contains stones above 50 mm or your duty exceeds 4,000 hours per year continuous, the AMG/AWN architecture is the structural fit, not a value-engineered substitute for general-purpose slurry pumps.
BBP Sand & Dredge Pump Lineup — 3 Product Paths for Every Slurry Profile
BBP quotes three recurring sand, gravel, and dredging application paths most often. Each path has a dedicated detail page for model sizing, OEM customization, wet-end material selection, and RFQ preparation.
AMG Series Gravel Pump
Flow rate:
36 – 2,750 m³/h
Head:
7 – 96 m
Solid passage:
82 – 241 mm
Outlet size:
100 – 350 mm
Drive:
V-belt / gearbox / coupling
Heavy-duty gravel and coarse sand pumps for sand pits, aggregate washing, tunneling discharge, and abrasive slurry with large particles.
See the Gravel Pump
Submerged Configuration Submersible Dredge Pump
Flow rate:
150 – 2,000 m³/h
Total head:
15 – 85 m
Max solid:
170 mm
Drive:
electric submersible / hydraulic
Depth:
up to 30 m standard
Submersible packages for applications where the pump runs directly at the slurry source instead of from a dry bank or deck.
See the Submersible Dredge Pump
AWN Series Sand Dredge Pump
Series:
AMG + AWN
Flow rate:
36 – 14,000 m³/h
Head:
7 – 96 m
Particle size:
up to 400 mm
Models:
20+ pump models
Dredge-duty pumps for river sand mining, cutter suction dredgers, sediment transfer, and long-discharge slurry pipelines.
See the Sand Dredge PumpLineup Specification Summary
| Product Path | Main Duty | Hydraulic Window | Solids / Material Focus | When to Use It |
|---|---|---|---|---|
| Gravel Pump | Aggregate and coarse sand slurry | 36 – 2,750 m³/h · 7 – 96 m | 82 – 241 mm solids · Ni-Hard / high-Cr wet end | Large-particle passage and wet-end wear set the first selection limit. |
| Submersible Dredge Pump | Pond, pit, sump, and excavator dredging | 150 – 2,000 m³/h · 15 – 85 m | 170 mm solids · hydraulic or electric drive | The pump must work below water level or directly at the slurry source. |
| Sand Dredge Pump | River dredging, cutter suction, sediment transfer | 36 – 14,000 m³/h · 7 – 96 m | Up to 400 mm particle size · AMG/AWN series | High-volume dredging and long-discharge slurry transport are required. |
Use the dedicated product page when the application is already identified. Use the AMG vs AWN matrix below when the project still needs first-pass series selection by application, solid size, head, and flow.
AMG vs AWN — Series Selection Decision Matrix
Selection rides on four parameters: primary application, maximum solid size, head requirement, and flow target. Use the series and size recommendations below—and then adapt to them using our slurry pump selector spreadsheet.
Application Profile
Max Solid (mm)
Head (m)
Flow (m³/h)
Recommended Series
Inland tunneling, slag granulation
≤80
5–35
36–600
AMG-D / AMG-E (6/4D, 8/6E)
Sand and gravel pit, processing plants
80–150
20–60
180–1,200
AMG-F / AMG-G (10/8F, 12/10G)
High-head inland dredging, long pipelines
120–200
40–92
500–2,000
AMG-GH / AMG-T-H (12/10G-AMGH, 14/12T(U)-AMG)
Severe-abrasion mining tailings, large stones
200–310
20–80
500–2,800
AMG-T-H / AMG-AMGH (16/14T(U)-AMGH)
Sea-going hopper dredge, barge loading
≤150
up to 60
1,000–6,000
AWN small-mid frame (200–500AWN)
Cutter suction dredger, river sand mining
≤200
up to 80
3,000–10,000
AWN large frame (600–1,000AWN)
Land reclamation, deep-channel dredging
≤250
up to 90
8,000–14,000
AWN extra-large frame (1,100–1,200AWN)
How buyers misapply the matrix
Most procurement teams size for peak flow rate without consideration for solid size. A 1,500 m³/h pump will choke on stones surpassing its design maximum — even if flow rate is met. Field experience consistently identifies wrong material specification and undersized impeller as the top two procurement-related failures in coarse-aggregate service, both of which the matrix above would address.
AMG Gravel/Sand Pump — Models, Specs & Wear-Resistant Engineering
BBP’s AMG range covers seven frames from 6/4D-AMG (36 m³/h, 100 mm outlet) through 16/14T(U)-AMGH (2,800 m³/h, 300 mm outlet). All models share the same single-stage, single-suction, cantilever architecture — what changes between frames is wet-end size, max solid passage, and head capability.
AMG complete model range
| Model | Outlet Dia. (mm) | Speed (rpm) | Flow (m³/h) | Head (m) | Max Power (kW) | Max Solid (mm) |
|---|---|---|---|---|---|---|
| 6/4D-AMG | 100 | 600–1,400 | 36–250 | 7–56 | 60 | 82 |
| 8/6E-AMG | 150 | 500–1,400 | 108–500 | 12–52 | 120 | 120 |
| 10/8F-AMG | 200 | 500–1,000 | 180–820 | 12–56 | 560 | 178 |
| 12/10G-AMG | 250 | 400–850 | 400–1,400 | 12–60 | 600 | 220 |
| 14/12T(U)-AMG | 300 | 300–700 | 700–2,300 | 8–60 | 1,200 | 241 |
| 12/10G-AMGH | 250 | 400–850 | 400–1,400 | 20–80 | 600 | 180 |
| 16/14T(U)-AMGH | 300 | 250–700 | 1,000–2,800 | 20–80 | 1,200 | 310 |
Source: BBP AMG product catalog, 2024 production batch. Drive options for all frames: V-belt, gearbox, flexible coupling, or rigid coupling. The “GH/AMGH” suffix denotes a high-head heavy-duty variant for tunneling and long-distance pipelines.
Wet-end materials and wear-life engineering
Wear parts (impeller, frame plate, frame plate liner, throat bush, cover) are cast in 27% high-chrome alloy (A05 equivalent), heat-treated to ≥600 Brinell — the same material class used by major Tier-1 OEMs for severe-duty service.
For applications with finer particles (≤30 mm) but high concentration of corrosive media, BBP supplies natural-rubber-lined or polyurethane-lined wet-ends from the same base frame, within the same hydraulic envelope. Material choice is driven by particle hardness and chemistry, not by pump model.
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We tested A05 27% high-chrome and 30% high-chrome variants across mining-tailings duty cycles before standardizing the AMG/AWN wet-end on A05. The 30% chrome alloy tests harder on the bench, but it is more brittle under particle-impact loading above 200 mm — A05 is the better field-life choice for the duty cycles AMG is built for.
AWN Dredging Pump — 200–1,200 mm Range with Concentrated Maintenance Design
AWN dredging pumps cover the high-volume end of the duty spectrum: 200AWN through 1,200AWN, with three structural variants selected by frame size. Sealing options scale from gland packing (default) through mechanical-stuffing combined seals to expeller seals for the most demanding service.
AWN frame sizes and structural variants
| Frame Range | Suction Dia. | Architecture | Typical Service |
|---|---|---|---|
| 200AWN – 500AWN | 200–500 mm | Single-casing, single-stage, single-suction, cantilever, detachable bracket | Mid-volume dredging, sand mining, hopper dredgers |
| 600AWN – 1,000AWN | 600–1,000 mm | Double-casing, single-stage, single-suction, with center adapter | Cutter suction dredgers, harbor maintenance, large mining ponds |
| 1,100AWN – 1,200AWN | 1,100–1,200 mm | High-head dredging series, double-casing | Land reclamation, long-distance hydraulic transport |
Sealing options matched to service severity
Gland packing seal (default)
Simplest setup, lowest spare-part cost, suitable when clean-water flush is available at the seal cavity.
Mechanical-stuffing combined seal (optional)
Reduces gland-water consumption and extends packing life — chosen when external flush water is restricted.
Expeller seal
Dynamic centrifugal seal, no external flush needed at running speed; best for portable or remote installations.
Why the detachable bracket matters for uptime
The 200–500AWN frames use a fully detachable bracket between the wet end and bearing assembly. Front-access maintenance lets the impeller, liner, and throat bush be removed and replaced without disturbing the bearing cartridge or driveline alignment.
For dredgers running 16–20 hours per day, this design cuts planned-maintenance downtime by roughly half versus integrated-frame architectures. The buyer pain consistently identified in dredge procurement studies — extraction stability over time — maps directly to maintenance access at this scale of pump.
AWN Drive Options
AWN drive options include direct gearbox drive (most common for cantilever frames), submersible electric drive (cable-deployed for sump and dredger applications), and hydraulic drive for excavator-attachment service. See the submersible dredge pump page for cable-deployed and excavator-mounted setups.
AMG/AWN vs Standard Slurry Pumps — Performance Comparison
Conventional horizontal slurry pumps (AH-class workhorses you find in 80% of mineral-processing installations) are designed for fine-to-medium size range at moderate solids concentrations. They are the right choice for cyclone-overflow, mill-discharge, and tailings-thickener applications. For coarse-aggregate dredging duty, however, the architecture mismatch shows up as predictable wear-life and clogging penalties.
Performance Dimension
Standard AH-class Slurry Pump
BBP AMG Gravel/Sand Pump
BBP AWN Dredging Pump
Max solid passage
≤80 mm
60–310 mm
up to 250 mm continuous
Flow ceiling
up to ~3,000 m³/h
up to 2,800 m³/h
up to 14,000 m³/h
Head ceiling
up to ~70 m
5–92 m
up to 90 m
Wear-part service life (mining tailings)
3–6 months standard steel
6–12 months high-chrome A05
6–12 months high-chrome A05
Wet-end maintenance access
full disassembly typical
front-access cantilever
detachable bracket (200–500AWN)
Suitable particle profile
fine-to-medium, cycloned
coarse, sharp, ≤310 mm
large-volume sediment, ≤250 mm
One takeaway here is operational, not aspirational: AMG/AWN are not “better” than AH-class — they are the right structural choice when your slurry contains stones, gravel, or sand-rock mixtures that an AH-class wet-end was never designed to pass. For mid-particle abrasive service, see the BBP horizontal slurry pump and vertical slurry pump ranges.
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Specification Compliance — Industry Standards, Test Methods & Frame Designation Logic
Procurement + EngineeringEPC and end-user project specifications express duty across three industry-standard layers: hydraulic-performance test, material grade, and frame size. The table below maps the AMG/AWN catalog to the industry-standard layers that procurement teams reference in RFQ documents, so you can confirm compliance against the spec language already in your project paperwork.
Specification Layer
Standard / Reference
How AMG / AWN Comply
Hydraulic performance test
HI / ANSI 9.6.2 — Allowable Operating Region
Each frame ships with a factory-witnessed performance test report; head, flow, and efficiency mapped against the AOR window.
Centrifugal pump technical spec
ISO 9905 — Class I centrifugal pumps
Construction, materials, and tolerance grade meet Class I requirements; certificate provided with shipment.
Quality management system
ISO 9001:2015
BBP holds active ISO 9001 certification covering casting, machining, assembly, and testing.
Wear-part alloy grade
27% high-chrome white iron (industry A05 grade), ≥600 Brinell
Wet-end components cast in-house; alloy chemistry traceable to the casting batch on the certificate.
Frame size designation
Suction × discharge inches + duty letter (industry-standard “X/Y-Z” format)
“6/4D-AMG” = 6-inch suction × 4-inch discharge, D-frame, AMG series. Same notation pattern across all 18 AMG/AWN models.
European market export
CE Marking
Available on request for EU-bound orders; PED/Machinery Directive paperwork prepared per shipment.
How to translate a generic RFQ duty spec into a BBP frame
Most project specifications give the four numbers that matter — flow rate, total head, max solid passage, and continuous run-hours. These four numbers map directly to the Decision Matrix in section 2 above. If your project document instead names a specific OEM series, our application engineering team will translate that designation into the equivalent AMG/AWN frame at quotation stage — naming-convention differences are not a procurement obstacle.
Applications & Wear Engineering — Mining Tailings, River Sand, Dredging, Hydraulic Backfill
AMG and AWN pumps are deployed across six application clusters where coarse-particle handling and continuous duty drive the buying decision. The engineering challenge stays the same in all six: keep wet-end geometry open enough to pass the largest expected particle, while resisting abrasion long enough to make the maintenance interval economical.
Mining tailings transport
Iron ore, copper, bauxite, gold tailings — usually 30–40% solids by volume, 50–200 mm particles. AMG-T-H frames with A05 wet-end.
River sand mining
1,000 m³/h is a typical 12-inch sand gravel pump duty point in active river-mining operations . AWN 400AWN/500AWN matches this directly.
Harbor & channel dredging
Continuous duty 16–20 hr/day, sand and silt with intermittent stones. AWN 600–1,000AWN frames with mechanical seal.
Hydraulic backfill / land reclamation
Long-distance pipeline transport, head-driven duty. AMG-AMGH or AWN 1,100–1,200AWN.
Coal-fired plant fly-ash ponds
Abrasive ash slurry, lower-particle but high-volume. AMG-G or 12/10G-AMG with rubber-lined option.
Slag granulation, steel mill recirculation
Hot, abrasive granulated slag — A05 high-chrome, gland packing with cooling-water flush. AMG-D / AMG-E.
Procurement Transparency — Tier Pricing, MOQ, Lead Time, Certifications, Warranty
Most OEM manufacturers publish “Request Pricing” and then stop. Below, the pricing-tier table can give your procurement teams a practical budget framework – accurate enough to produce a gate check on whether AMG / AWN warrants a shortlist entry, with the explicit proviso final price depends on alloy class, drive type, sealing combination, and order volume.
Indicative price tiers (USD, FOB China)
Basic — AMG-D / AMG-E
$3,500 – $12,000
- 6/4D-AMG to 8/6E-AMG frames
- Standard A05 high-chrome wet-end
- V-belt drive, gland packing
- Bare pump (no motor / baseplate)
Mid — AMG-F / AMG-G / AMG-T
$12,000 – $48,000
- 10/8F to 14/12T(U) frames
- A05 high-chrome or rubber-lined
- Gearbox or coupling drive
- Optional mechanical seal
High-End — AMG-H / AWN
$48,000 – $180,000+
- 16/14T(U)-AMGH and full AWN range
- Custom alloy / wear package
- Direct or hydraulic drive
- Expeller seal, instrumentation
Pricing transparency note: Final price depends on alloy specification, drive configuration, sealing option, baseplate & coupling package, and order volume. Tiers above reflect FOB-China bare-pump pricing for a single unit at standard alloy spec; OEM-volume orders, full skid packages, and project-specific customizations move pricing within and beyond these ranges. Request a binding quote for your duty profile.
Procurement specifics
MOQ
1 unit for finished pumps; 5+ units for spare-parts orders. Volume discounts begin at 5 units for the same frame size.
Lead time
6–8 weeks for in-stock frames (AMG-D, AMG-E, 200–500AWN); 12–16 weeks for custom alloy or large-frame AWN; 4 weeks for spare parts dispatched from inventory.
Payment terms
T/T or L/C; 30% deposit, 70% before shipment standard. Open-account terms available for established distributors.
Warranty
12-month standard warranty on workmanship; wear-part warranty pro-rated against published service-life estimates per duty class.
Spare-parts inventory
BBP maintains continuous inventory of impellers, liners, throat bushes, and bearing assemblies for AMG and AWN 200–500AWN frames. Same-week dispatch from Beijing for stock items.
Technical support
24/7 application engineering, remote diagnostics, and on-site commissioning support for first installations or major projects.
Certifications & compliance
ISO 9001
Quality management system
CE Marking
Available for EU export
HI 9.6.2
Hydraulic Institute slurry pump test standard
A05 Material Spec
27% high-chrome, ≥600 Brinell, traceable to casting batch
Sand & Dredge Pump Engineering Tools
pump selector
Quickly determine the most efficient pump model and technical specifications tailored to your dredging project parameters.
wear life tco
Calculate Total Cost of Ownership and estimate component wear life to maximize your operational efficiency and reduce downtime.
Frequently Asked Questions
AMG series meets coarse-aggregate slurry duty with stones up to 310 mm and requirement heads up to 92 m – a mining-tailings, sand-pit, and tunneling profile. AWN is for the real high-volume dredging applications, where suction-lift, flow rate and continuous run-hours are the prevailing spec criteria. Our Decision Matrix earlier on this page maps these variable to the recommended frames.
AMG passes solids up to 310 mm on the 16/14T(U)-AMGH frame, the other sizes are scaled in relation to the 16/14T(U). AWN frames pass continuous-flow particles up to 250 mm diameter on the largest sizes, and can allow occasional passage of larger fragments through its open impeller geometry without binding; the designated particle size for continuous duty is 250 mm diameter.
Both are centrifugal pumps for particulate-transport, but with different potential failure modes. Conventional slurry pumps (AH-class) are designed for fine to medium particles at medium concentrations in clean feed streams. Dredge pumps (AWN-class) are designed for high-volume dredging of sediments through variable feed streams, longer stand-time, and larger overall particle sizes with broader size distribution; wet-end clearances are wider, suction geometry favors priming, and the bracket design assumes intensive wear-part replacement on a fixed schedule.
Wet-end wear parts (impeller, liner, throat bush) cast in 27% high-chrome A05 alloy give 6-12 months service life in typical mining-tailings duty, as compared to 3-6 months for standard cast-steel components. Bearing assemblies and frame castings are designed for 5+ years of continuous service with proper lubrication and operating temperatures.
Yes; AMG frames can be supplied with submersible electric drive (cable-deployed) or hydraulic drive (excavator-determined) for dredging operations where the pump cannot be located at the delivery point. See our submersible dredge pump page for details of available Configurations:. AWN dredge frames are normally deck-mounted on a baseplate, but modifed or custom submersible arrangements are available.
Lead time is 6-8 weeks for in-stock standard frames (AMG-D, AMG-E, 200-500AWN), 12-16 weeks for smaller batches of customized alloy specifications or large AWN frames (600-1,200AWN), and about 4 weeks for spare parts shipped from stock. BBP stocks high-chrome impellers, liners, and throat bushes for the most common AMG and AWN frames at our Beijing workshop – same-week shipping if ordered from inventory.
All wet-end parts are cast of 27% high-chrome alloy and heat-treated to 600 Brinell hardness. This is the most common controlled-alloy grade used for slurry-pump manufacture. Batch chemistry, batch size, and target hardness are included with the shipping documentation as a certificate of compliance. Impeller-disk diameter, vane configuration, and torque-bolt placement are matched to the AMG frame, and worn parts are forward-compatible within a frame series.
BBP’s AMG-AMGH series (12/10G-AMGH and 16/14T(U)-AMGH) will operate at heads from 20 m up to 80 m, at speeds up to 850 rpm, producing a similar series of working pressures verified to industry slurry-pump test standards. For hydraulic conveyance needs multi-stage to surpass single-pump head limitations, AWN series frames can be outfitted in series-booster configuration – please request a duty-specific assessment.
While some application overlaps exist between the AMG sand and gravel pumps and the AWN dredge pumps, we have them tuned for different working conditions. Our sand and gravel (the AMG series) pumps are designed for short- to-medium pipeline transport of coarse aggregate at moderate flow rates (like those typical of aggregate processing plants, hydraulic transport, and tunneling) whereas our dredge pumps (the AWN series) are tuned for high-volume continuous sediment removal with increased suction-plant capabilities (longer suctions lifts, larger frame sizes, wider wet-end clearances). Numerous application-types (like river sand-mining) exist right on the line between these two series, hence the Decision Matrix indicating application profile instead of a singular keyword.
Begin with three numbers: required flow (m³/h), total head (m), and maximum expected solid particle size (mm). Our Decision Matrix above maps these to a recommended frame. Refine the sizing with our slurry pump selector calculator, which considers solids concentration, pipeline length, and elevation. For unlikely duty cycles (extremely high solids concentrations, and/or long pipelines), let our application engineering team produce a custom pump curve before quoting.
A standard purchase package, according to your scope of work, includes the pump (fitted with the motor and baseplate, with fixture type indicated), select spare parts kit based on factory testing/inspection, factory hydrostatic and efficiency test report, certificate of origin, user manual. Optional add-ons include on-site commissioning assistance, operator/maintenance training, and remote-diagnostic instrumentation. Request a configured quote for the scope-of-supply.
For excavator-mounted dredging, BBP supplies AWN frames with hydraulic drive packages compatible with most hydraulic-out interfaces of excavators, mounted on mounting brackets sized for the excavator boom. For cable-deployed dredging, either the same AWN frames are suitable with the addition of a submersible electric drive and cable-suspension yoke rated for 100 feet of development in fresh water. Both packages are specified on the submersible dredge pump page.
