Bitumen · AVL-BPD
Bitumen Pressure Distributor
Precision bitumen distribution for consistent, calibrated road surfacing.
3,000–12,000 litres tank capacity; application rates 0.3–4.0 l/m²
Output capacity
6
Model variants
18
Spare parts
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Overview
The Avelta AVL-BPD Bitumen Pressure Distributor is a purpose-engineered binder application machine — available in truck-mounted and semi-trailer configurations — designed to deliver calibrated, uniform coats of bitumen, modified binders, and asphalt emulsions onto road surfaces at precisely controlled application rates. The unit is the essential tool for prime coat, tack coat, fog seal, surface dressing, and chip seal operations, where a consistent, metered film of binder is the structural foundation of every pavement layer above it. Procurement engineers and plant managers specify the AVL-BPD series for national highway construction, airport airside rehabilitation, and heavy-duty industrial yard resurfacing, where application accuracy is contractually mandated and deviation carries direct structural and financial consequence.
At its core, the distributor draws heated bitumen from a heavily insulated mild-steel tank, circulates it continuously through a full-circulation ring main to prevent viscosity loss from cold spots, and delivers it under controlled pump pressure through a multi-section, hydraulically adjustable spray bar fitted with flat-fan nozzles at uniform 25 mm spacing. Application rate — expressed in litres per square metre — is maintained automatically by cross-referencing vehicle ground speed, via a GPS or wheel-pulse sensor, against pump output. This allows the operator to hold the target rate even as road gradient, traffic conditions, or surface texture alter travel speed. The spray bar is sectionalized so individual circuits can be opened or closed independently, enabling precise edge work and transitions without overspray or missed coverage.
Avelta BPD units are fabricated to withstand the thermal cycling, vibration, and chemical aggressiveness inherent in high-throughput bitumen handling over multi-year project lifespans. Tank walls incorporate 50 mm mineral-wool insulation under stainless-steel outer cladding, limiting ambient heat loss to under 2 °C per hour and reducing burner run-time between application passes. The computer-calibrated rate controller provides a real-time readout of cumulative area covered, litres consumed, and deviation from the target rate — data the site QA engineer can archive against contract specifications. Each unit leaves the Avelta works pre-commissioned, hydraulically pressure-tested, and documented with calibration records, then crate-packed for sea freight with a bilingual commissioning manual and a recommended first-fill spare-parts kit.
Typical applications
- Prime coat application over prepared granular sub-base or base course prior to asphalt laying
- Tack coat application between binder course and wearing course to ensure inter-layer bond
- Surface dressing (chip seal and otta seal) binder layer application on rural and low-volume roads
- Fog seal and rejuvenating treatment on aged or oxidised asphalt wearing course
- Cape seal and slurry seal base binder layer on medium-traffic paved roads
- Airport airside pavement rehabilitation — runway, taxiway, and apron resurfacing contracts
- Industrial yard, port terminal, logistics hub, and heavy vehicle depot surfacing
- Emergency road maintenance — crack sealing and pothole pre-treatment using hand-lance attachment
| Tank Capacity Range | 3,000–12,000 litres (660–2,640 gal), model dependent |
|---|---|
| Spray Bar Working Width | 2.5–6.0 m (8.2–19.7 ft), hydraulically adjustable in sections |
| Application Rate (Spray Rate) | 0.3–4.0 l/m², electronically calibrated via rate controller |
| Main Bitumen Pump Type & Output | Positive-displacement gear pump, 300–800 l/min (66–176 gal/min) |
| Heating System | Direct-fire diesel burner with immersed tank heating coils; 8–22 l/h fuel consumption, load dependent |
| Maximum Operating Temperature | 200 °C (392 °F); digital thermostat control ±2 °C accuracy |
| Tank Insulation | 50 mm mineral-wool batt, stainless-steel outer cladding; heat loss <2 °C/h in ambient conditions |
| Spray Bar Sections | 6–12 independently valved circuits; individual on/off from rear console |
| Nozzle Specification | Flat-fan type, 25 mm uniform spacing, adjustable 0°–30° rotation for binder grade and air temperature |
| Vehicle Speed During Spray | 3–20 km/h (1.9–12.4 mph); rate controller compensates across full range |
| Ground Speed Sensing | GPS module or wheel-pulse sensor (both supplied); auto rate compensation active |
| Pump Drive System | PTO-driven (standard) or independent hydraulic motor (option for semi-trailer units) |
| Fill / Transfer Pump | Centrifugal type, 400 l/min (88 gal/min); rear-mounted with camlock coupling |
| Chassis Configuration | Truck-mounted (3,000–8,000 L models) or semi-trailer (8,000–12,000 L models); LHD/RHD to order |
Working Principle
How the Bitumen Pressure Distributor works
- 01
Loading and Filling
Bitumen is transferred from a road tanker or storage tank into the AVL-BPD vessel through the rear-mounted fill coupling using the on-board centrifugal transfer pump, rated at 400 l/min. A sight glass and tank-level gauge confirm fill volume before the loading valve is closed and the coupling capped.
- 02
Heating to Operating Temperature
The direct-fire diesel burner ignites automatically under digital thermostat control and heats the binder through immersed heating coils until the set operating temperature — typically 150–180 °C for penetration-grade bitumen — is reached and stabilised to within ±2 °C. A high-temperature safety cutout prevents overheating.
- 03
Full-Circulation Priming
Before spraying begins, the gear pump circulates heated bitumen through the entire ring main — including the spray bar body — and back to the tank, ensuring the bar reaches operating temperature and purging any residual cold material. This step eliminates the nozzle-blocking delays common in partial-circulation systems.
- 04
Rate Setting and Pre-Spray Checks
The operator enters the target application rate (l/m²) and working spray-bar width into the rate controller console at the rear of the machine. Nozzle angle is verified for the binder type in use, section valves are set to the required working width, and the vehicle is driven to the start line at the prescribed speed.
- 05
Application Pass
As the vehicle advances at a steady speed between 3 and 20 km/h, the rate controller reads ground speed from the GPS or wheel-pulse sensor and modulates pump output in real time to maintain the target l/m². Bitumen exits through the flat-fan nozzles in overlapping fans that produce a uniform, continuous film across the full working width.
- 06
Section Valve and Edge Control
Individual spray-bar section valves are opened or closed from the rear console to match lane boundaries, crossfall transitions, or irregular geometry. The hydraulic fold mechanism retracts outer bar sections for narrow passes or for road transit without interrupting the circulation loop.
- 07
Flushing and Shutdown
At the end of the working shift or before a change of binder grade, diesel solvent is circulated through the pump, ring main, and spray bar to displace residual bitumen, preventing curing and blockage. The bar is retracted, end caps are fitted, and the digital controller stores cumulative area and volume logs for the day's work.
Engineered Advantages
Why buyers specify the Avelta BPD.
Automatic Rate Control with Speed Compensation
The integrated application rate controller continuously cross-references ground speed — measured by GPS or wheel-pulse sensor — with pump output flow, adjusting pump speed in real time to maintain the target l/m² irrespective of terrain gradient or minor speed variation. This eliminates the under- and over-application that results from manual adjustment on variable topography.
Full-Circulation Ring Main System
Heated bitumen is circulated continuously through the entire spray bar body and back to the tank whenever spraying is paused, maintaining bar temperature and binder viscosity without re-heating delays. This design eliminates nozzle blockage from cooled binder and ensures the first metre of every application pass is as consistent as the last.
High-Performance Insulated Tank
A 50 mm mineral-wool insulated tank body under stainless-steel cladding limits heat loss to under 2 °C per hour in typical ambient conditions, reducing burner fuel consumption during transit and enabling longer intervals between heating cycles. The inner tank surface is shotblasted and epoxy-coated for long-term compatibility with modified binders and polymer-modified bitumen.
Hydraulically Controlled Multi-Section Spray Bar
The spray bar folds and extends hydraulically from the rear console in seconds, removing the need for manual deployment or road-crossing by operators. Independent section valves allow the working width to be narrowed for shoulder work, lane delineation, or irregular geometry without shutting down the pump or interrupting the circulation circuit.
Rear Operator Console with Data Logging
All operational controls — target rate, pump speed, section valves, thermostat set-point, and bar fold — are consolidated in a weatherproof rear console that keeps the operator clear of the spray zone. The controller logs cumulative area covered, total litres applied, and average achieved rate per shift, providing a ready audit trail for project quality records.
Robust Thermal Management and Safety Interlocks
The burner management system includes automatic ignition, flame-failure detection, and a high-temperature cutout that shuts off fuel supply before bitumen reaches a hazardous temperature. These interlocks protect the tank, pipework, and personnel without requiring operator intervention during heating cycles or during extended operation at site.
Export-Ready Build, Commissioning, and Spares Support
Every Avelta AVL-BPD is factory pre-commissioned, hydraulically pressure-tested, and calibrated before despatch. Units are crate-packed for sea or road freight with a bilingual operator and maintenance manual, a commissioning certificate, and a recommended first-fill spare-parts kit covering all high-wear consumable items. Avelta field engineers are available for site commissioning and operator training in-country.
Model Range
Choose the capacity for your output.
| Model | Capacity | Notes | |
|---|---|---|---|
| AVL-BPD 3000 | 3,000 litres (660 gal) | Compact trailer-mounted unit suited to maintenance patching, fog seal, and small-area chip seal contracts where a truck-mounted chassis is unnecessary. | Enquire → |
| AVL-BPD 5000 | 5,000 litres (1,100 gal) | Light truck-mounted configuration; the preferred entry point for rural road projects and municipal maintenance programmes where daily coverage requirements are moderate. | Enquire → |
| AVL-BPD 6000 | 6,000 litres (1,320 gal) | Mid-range workhorse for state and provincial highway prime coat and tack coat operations; balances payload with manoeuvrability on two-lane carriageways. | Enquire → |
| AVL-BPD 8000 | 8,000 litres (1,760 gal) | Heavy truck-mounted unit for continuous multi-lane highway construction; accommodates full 6 m spray bar and extended-day working without frequent refill stops. | Enquire → |
| AVL-BPD 10000 | 10,000 litres (2,200 gal) | High-capacity semi-trailer configuration for large-scale expressway and airport runway projects; supports rapid-progress surface dressing programmes with extended passes between loadings. | Enquire → |
| AVL-BPD 12000 | 12,000 litres (2,640 gal) | Maximum-capacity semi-trailer unit for major infrastructure programmes and export markets with long haul distances between bitumen supply points; dual-axle bogie for regulated axle-load compliance. | Enquire → |
Spare Parts
Bitumen Pressure Distributor spare parts
Genuine, precisely-toleranced components for the Bitumen Pressure Distributor. Every part below has its own page with details and a direct enquiry — or message us the part you need.
Spray System
4
Pump & Circulation
4
Burner & Heating
3
Controls & Instrumentation
4
Tank & Insulation
2
Ready to specify your Bitumen Pressure Distributor?
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