Explore our top-tier asphalt application machinery, bitumen decanters, pavers, and earthmoving solutions engineered for heavy-duty infrastructure projects worldwide.
The global highway maintenance, municipal paved surface rehabilitation, and airport runway sealing industries are currently undergoing a structural transformation toward high-precision automated hot bitumen spraying systems.
Modern highway infrastructure engineering demands minimal binder viscosity fluctuation during transport and distribution. Modern hot tar sprayers integrate high-output diesel burners with heat-transfer oil jacketed heating coils, maintaining uniform bitumen temperatures up to 200°C without localized thermal degradation or carbon buildup inside the tank reservoirs.
Transitioning away from manual valve adjustments, modern municipal contractors demand pulse-width modulation (PWM) spraying controls linked directly to radar ground-speed tracking sensors. This guarantees exact spray distribution (kg/m²) regardless of vehicle driving speeds, reducing material waste by up to 18%.
Environmental standards in North America and the European Union enforce strict low-emission heating burners and automatic compressed air pneumatic line-flushing systems. Post-operation automatic cleaning prevents asphalt solidification inside the spray bar nozzles and high-pressure bitumen pumps, extending service longevity.
Rooted in Chang'an University's world-renowned road engineering discipline since 1998, delivering unmatched technical competence in asphalt machinery manufacturing.
HEM Group was founded by a team of distinguished professors from Chang'an University alongside senior industrial specialists in road construction machinery. Originally designated as Xi'an Hongda Communications Technology Co., Ltd., it stands as the earliest high-tech enterprise focusing on independent R&D and design of asphalt maintenance machinery in China.
Recognized as a certified "High-tech Enterprise" by the Shaanxi Provincial Department of Science and Technology in 2006, our breakthroughs span mechanical dynamics, engine power matching, high-pressure hydraulic transmission systems, and digital electronic control units.
In 2017, to expand global direct technical support and global machinery distribution, HME TOP Machinery Equipment Co., Ltd. was formed as our official international division for export operations, technical commissioning, and localized after-sales support.
An overview of technical features distinguishing high-quality hot tar sprayers from standard market equipment.
| Technical System | Traditional Standard Sprayers | HEM Group Advanced Hot Tar Sprayers | Engineering Value & ROI Impact |
|---|---|---|---|
| Bitumen Heating Unit | Direct single-tube flame firing (Risk of asphalt aging/burning) | Thermal oil indirect circulation jacket + Automatic Riello diesel burner | Prevents chemical carbonization; maintains 100% bitumen binder ductileness. |
| Flow Control & Metering | Manual pump valve levers; estimated flow rate | Ground-speed tracking radar + Closed-loop PLC touchscreen feedback | Eliminates waste; maintains sub-1% spraying deviation across variable speeds. |
| Spray Bar Design | Fixed width; manual nozzle shut-off switches | Triple-overlapping pneumatic folding spray bar with individual nozzle switches | Enables flexible spraying widths (0.2m to 6.0m) for irregular road shoulders. |
| Pipeline Anti-Clogging | Manual diesel flushing (Time-consuming, environmental hazard) | Dual system: Automated heat jacket circulation + High-pressure air purging | Zero nozzle clogging; operational start-up within 10 minutes from cold state. |
| Hydraulic Drive System | Mechanical gear drive connected to PTO | Proportional hydraulic pump system driven by auxiliary engine/chassis PTO | Smooth pressure control without pulsation, ensuring seamless asphalt film deposition. |
High-viscosity SBS modified bitumen and rubber asphalt require strict temperature windows (170°C–190°C). Our hot tar sprayers utilize heat-transfer oil coils surrounding both the storage tank and the spray bar manifolds, guaranteeing fluid fluidity even under extreme freezing ambient weather conditions.
Achieving structural waterproofing and tack-coat adhesion requires uniform film thickness. Our specialized fan-shaped spray nozzles deliver a 3-fold overlap pattern, eliminating spraying streaks or missed seams on high-speed expressways.
Operators can adjust spraying distribution (kg/m²), monitor oil temperatures, toggle individual nozzle configurations, and diagnose hydraulic pressure warnings in real-time via an IP65 industrial-grade cab touchscreen display.
In addition to automated hot tar sprayers, HEM Group supplies a complete ecosystem of road construction, maintenance, pavement recycling, and heavy earthmoving machinery.
Including Intelligent Bitumen Distributors, Synchronized Chip Sealers, Micro-Surfacing & Slurry Seal Pavers, Asphalt Milling Machines, Cold In-Place Recyclers (CIPR), and Vacuum Road Sweepers.
High-yield Polymer/Rubber Modified Asphalt Plants, Emulsion Asphalt Plants, Asphalt Tankers & Semi-Trailers, and Thermal-Oil Heating Asphalt Drum Decanters.
Concrete & Slip-Form Pavers, DK1800 Road Shoulder Wideners, Heavy Bulldozers, Mini Excavators, Wheel Loaders, Backhoe Loaders, and Steel Drum Vibratory Rollers.
Mobile Primary Jaw Crushers, Mobile Vibrating Screen Plants, Mobile Roller Crushers, and specialized aggregate processing equipment for quarrying operations.
Extensive export presence spanning over 60 countries with dedicated local technical support and fast-turnaround spare parts replenishment centers.
To eliminate machinery downtime, our company maintains localized technical distribution networks and parts warehouses in key regions including:
How HEM Group is integrating AI edge computing, autonomous guidance, and zero-emission heating technologies into the next decade of road machinery.
Integrating high-speed optical camera sensors with edge AI algorithms to automatically detect road cracks in real-time, dynamically commanding individual hot tar nozzles to spray targeted sealants only where fissures exist, slashing material consumption by 40%.
Transitioning from pure diesel burners to dual-fuel electric induction and clean-burning hydrogen-blended thermal oil boilers. This drastically minimizes operational carbon footprints during municipal nighttime road restoration jobs.
Full integration of IoT telemetry and 5G GNSS-RTK positioning to synchronize hot tar sprayers, chip sealers, and vibratory rollers into a self-coordinating autonomous paving convoy with millimeter-level accuracy.
In-depth technical answers for procurement directors, highway engineers, and fleet equipment managers.
Review our secondary lineup of specialized road maintenance equipment, chip spreaders, asphalt plants, and earthmoving machinery.
HME Machinery
