Explore our premium tier of road maintenance and infrastructure machinery engineered for maximum durability and precision.
HEM Group was established in 1998 (originally as Xi'an Hongda Communications Technology Co., Ltd.) by a distinguished panel of professors from Chang'an University—China's premier academic institute for highway engineering and transportation machinery. This deep-rooted academic backbone ensures every portable asphalt emulsion sprayer is designed with thermodynamic precision, fluid-dynamic stability, and optimized mechanical dynamics.
Recognized as a certified "High-Tech Enterprise" by the Shaanxi Provincial Department of Science and Technology in 2006, our research laboratory has secured dozens of invention patents. Key developments include engine power matching systems, digital electronic micro-metering control, and high-efficiency hydraulic transmission for asphalt emulsion sprayers and pavers.
In 2017, HME TOP Machinery Equipment Co., Ltd. was established to streamline global export operations, logistics, custom engineering solutions, and round-the-clock technical field assistance. Today, our equipment operates seamlessly across diverse geological zones worldwide.
The worldwide highway maintenance sector is undergoing a massive paradigm shift. As governments and private contractors prioritize preventive road maintenance over complete reconstruction, the demand for **portable asphalt emulsion sprayers** has surged exponentially. Modern road maintenance strategies demand cost-effective, rapidly deployable machinery capable of applying uniform tack coats, prime coats, fog seals, and localized patch repairs without requiring large-scale truck-mounted distributors.
In urban municipal maintenance and remote rural paving, heavy asphalt distributors face access limitations. Portable sprayers bridge this gap by delivering mobility, minimal fuel footprint, and rapid setup times. Contractors achieve higher operational efficiency by deploying trailer-mounted or tow-behind emulsion sprayers for utility trench reinstatement and parking lot sealing.
Global environmental policies targeting VOC emissions and greenhouse gases have accelerated the adoption of cold-applied bitumen emulsions over hot-mix asphalt (HMA). Portable asphalt emulsion sprayers handle modified cationic (CRS-2, CMS-2) and anionic emulsions safely at lower operating temperatures, significantly reducing energy consumption and site emissions.
For small-to-medium civil contractors, capital expenditure (CapEx) efficiency is paramount. A portable emulsion sprayer offers a fraction of the acquisition cost of a heavy truck-mounted unit while retaining precision metering capabilities, quick cleanout flushing systems, and multi-viscosity emulsion compatibility.
As a leading portable asphalt emulsion sprayer manufacturer, our technical design focuses on solving key field challenges: nozzle clogging, emulsion shearing, uneven application rates, and thermal degradation.
Asphalt emulsions are delicate chemical suspensions of bitumen droplets in water held by emulsifying agents. High-shear gear pumps can break the emulsion prematurely inside the tank. Our portable sprayers utilize custom low-shear rotary vane or positive-displacement pumps, maintaining fluid stability across variable operating pressures.
To accommodate cold climate operations, our sprayers feature LPG direct-burner systems paired with insulated tank shells. Automatic temperature control loops prevent localized overheating, protecting modified polymer emulsions from thermal cracking while ensuring optimal spraying viscosity.
Emulsion buildup in hoses and spray wands is the leading cause of job site downtime. Integrated diesel or compressed-air flushing lines enable operators to clear the entire spray bar and hand-wand assembly in under two minutes prior to shut-down.
Integrating radar ground-speed sensors with micro-PLC units allows the sprayer to dynamically adjust pump RPM relative to operator walking or towing speeds, maintaining an exact application rate ($kg/m^2$) regardless of terrain speed variation.
Replacing auxiliary gasoline engines with quiet, high-torque Lithium-ion battery powertrains eliminates tailpipe emissions on municipal night jobs and reduces maintenance overhead for electric power units.
Cloud-connected GPS telematics log spray temperatures, total square meters covered, and emulsion volume applied, giving highway engineers real-time quality assurance data directly sent to project management dashboards.
Different geographic and climatic regions present unique civil engineering challenges. Our equipment portfolio delivers tailored macro solutions across diverse global environments:
Geographies: Southeast Asia (Indonesia, Malaysia), West Africa (Nigeria, Ghana).
Engineering Challenge: Slow curing rates of rapid-setting emulsions due to atmospheric moisture.
Macro Solution: High-pressure mist atomization combined with specialized rapid-breaking cationic emulsions (CRS-1), accelerating water evacuation and curing times.
Geographies: Eastern Europe, Central Asia (Uzbekistan, Russia).
Engineering Challenge: Premature freezing or emulsion phase separation in extreme cold.
Macro Solution: Thermally insulated jacketing paired with automated LPG pre-heating units, maintaining fluid temperatures between 50°C and 70°C during cold-weather tack coating.
Geographies: South America (Bolivia), Mountainous Regions.
Engineering Challenge: Auxiliary engine power loss due to thin air.
Macro Solution: Turbocharged power plants and high-altitude calibrated burner systems ensuring uninterrupted hydraulic pressure across mountain highway maintenance.
Earthmoving & Sub-Base Preparation
Road Construction & Tack Coating
Mining & Aggregate Crushing
Direct factory manufacturing backed by academic research from Chang'an University highway machinery specialists.
End-to-end guidance on emulsion formulation matching, spray calibration, and layer bonding technology.
Tailored tank capacities, specialized spray bar widths, and custom trailer chassis to match exact job requirements.
Round-the-clock online assistance, field engineer dispatch, and rapid spare parts distribution.
Active service centers and warehouses across Russia, Malaysia, South Africa, Uzbekistan, Ghana, Kenya, Indonesia, and Sri Lanka.
Comprehensive heavy machinery solutions for road rehabilitation, aggregate crushing, and earthmoving.
HME Machinery
