Efficiency and cost savings are essential in the world of powder coating. Traditional spray systems often result in excessive powder usage and unnecessary expenses. However, Nordson's High Density, Low Velocity (HDLV) technology, found in their Encore HD powder spray systems, has transformed the industry by significantly reducing powder waste.
This article explores how HDLV technology works, its benefits for customers, and the advantages of using this system, emphasizing its ability to deliver fast returns on investment (ROI) through substantial powder savings.
Efficiency and optimization are crucial in the world of powder coating. While electrostatics and charging system controls have traditionally been the focus of improvement, the role of aerodynamics cannot be overlooked. Nordson introduces HDLV (High Density Low Velocity) technology, a breakthrough method of powder coating delivery that revolutionizes the industry.
This article explores the advantages of HDLV technology, its impact on powder application efficiency, and the benefits it offers in terms of coverage, cost control, color change speed, and powder recovery efficiency, compared to other technologies, such as Nordson Venturi.
After reading this article, you will better understand how Nordson HDLV Technology enables Powder Savings of 10-12% compared to the traditional Venturi Solution.
Unlocking Powder Coating Efficiency
To achieve optimal powder application efficiency and coverage, addressing various aerodynamic factors is essential. These include:
spray pattern dynamics
powder pump functionality
controlling aerodynamic turbulence in the coating deposition area
Conventional ejector-pump systems, often used for powder transfer, have limitations due to their excessive air volume requirements.
More Powder - Less Air
Nordson's HDLV Technology for powder application, offers a groundbreaking solution that surpasses the limitations of traditional ejector-pump systems. HDLV Technology ensures efficient powder delivery from the feed hopper to the spray nozzle with minimal air volume. This technology presents significant advancements in several key areas.
1. Independent Optimization
HDLV technology enables independent optimization of powder output and spray pattern aerodynamics, enhancing overall application efficiency and quality.
2. Linear Pump Curve
Unlike ejector-pumps, HDLV pumps show a linear pump curve, ensuring consistent powder-to-air ratios regardless of output levels. This avoids the negative impact of increased spray pattern velocity associated with conventional systems (over spraying, powder waste, etc.)
3. Soft, Controlled Spray Patterns
The combination of HDLV pumps and innovative spray nozzle designs allows for effective shaping of spray patterns with minimal air volume. This achieves soft, flexible spray patterns with reduced air volume compared to conventional systems.
Enhanced Coating Control
HDLV technology offers precise control over applied coating thickness, minimizing variances and improving overall efficiency.
The absence of wear parts in HDLV pumps ensures stable and consistent powder output, eliminating the need for frequent manual adjustments.
Color Change Speed
HDLV solutions simplify color changes through efficient purge functions, streamlined powder paths, and dedicated powder recovery pumps. The result is exceptionally fast color change times, enhancing productivity and reducing downtime.
Efficiency Beyond Application
Powder Recovery Efficiency HDLV technology contributes to improved powder recovery efficiency in cyclone-based powder booths. HDLV pumps actively draw powder from the bottom of cyclones, minimizing accumulation and optimizing cyclone performance. Additionally, the low air volume used by HDLV pumps eliminates the risk of over-pressurizing powder screeners, reducing throughput and powder losses.
HDLV vs Venturi Pumps
Provide Process Control
No Process Control
Offers Powder Savings
No Powder Savings
Stable Coating Quality
Operator Dependent Quality
No Part Replacement in 1 year, 2 shifts (min downtime)
Venturi Replacement Every Week
Delivers up to 750 grams/min high density powder
Delivers up to 250 grams/min low density powder
No Settings Adjustment Needed
Daily/Hourly Adjustment Needed
Hight TE due to Low Density of Powder (no bounce back)
Low TE due to High Velocity of Powder
Better Charging due to Low Velocity of Powder
Low Charging Efficiency due to High Velocity of Powder
Less Overspray du to Low Velocity of Powder
High Overspray due to High Velocity of Powder
Independent Control of Powder and Air Volumes
Powder and Air Volume Control Dependent
Self-Cleaning Pump. Auto Color Change in less than 20s
No Self-Cleaning Pump Technology
Nordson's HDLV technology marks a new era in powder coating efficiency. By focusing on aerodynamics, HDLV offers:
precise powder delivery
independent optimization of powder output
soft and controlled spray patterns
With enhanced coating control, streamlined color changes, and improved powder recovery efficiency, HDLV technology transforms powder coating operations, increasing productivity, reducing costs, and improving overall quality.
To learn more about how HDLV technology can drive your business's ROI, we invite you to contact our team of powder coating experts.