This article presents a detailed case study of a PVC powder negative pressure centralized pneumatic conveying system successfully implemented in Da Nang, Vietnam. The project was executed by Shandong Headpowder Engineering Co., Ltd., a leading engineering company specializing in bulk material handling and pneumatic conveying solutions. The client, a major PVC processing facility in Da Nang, required a reliable, dust-free, and energy-efficient method to transport PVC powder from storage silos to multiple production lines. The solution adopted was a negative pressure centralized pneumatic conveying system, which ensures gentle handling of the friable PVC powder while maintaining high throughput and minimal product degradation. This case study highlights the technical challenges, system design, and operational benefits achieved through the collaboration between Headpowder and the Vietnamese factory.
Da Nang, a rapidly industrializing city in central Vietnam, hosts a number of chemical and plastics manufacturing plants. The client in this case operates a large-scale PVC profile and pipe production facility, consuming several tons of PVC powder daily. Prior to the project, the factory relied on manual bag dumping and mechanical conveyors, which resulted in high dust emissions, frequent material spillage, and inconsistent feed rates. The management sought a modern, automated solution that would reduce labor costs, improve workplace safety, and comply with stringent environmental regulations. Key requirements included: 1) fully enclosed conveying to eliminate dust leakage, 2) ability to transport PVC powder over a distance of 150 meters with multiple branch points, 3) gentle handling to avoid particle breakage, 4) centralized control for easy operation, and 5) low maintenance and energy consumption. After evaluating several options, the client chose Headpowder's negative pressure centralized pneumatic conveying system, which has proven effective in similar PVC powder applications across Asia.
The core technology deployed in Da Nang is a negative pressure (vacuum) centralized pneumatic conveying system specifically designed for PVC powder. In this system, a powerful vacuum pump creates a negative pressure gradient inside the conveying pipeline, drawing the PVC powder from multiple pick-up points (e.g., storage silos, big bag stations) into a common header pipe. The material is then transported to a central receiver or cyclone separator, where the air and powder are separated. The powder is discharged into downstream equipment, while the cleaned air is exhausted or recycled. This negative pressure approach offers several advantages for PVC powder: it prevents dust escape into the workplace, reduces the risk of static electricity buildup (critical for PVC), and enables long-distance conveying with minimal air consumption. The Da Nang installation includes a 10-inch stainless steel pipeline laid overhead to avoid interference with factory traffic, and a PLC-based control system that monitors pressure, flow rate, and material level in real time. The system handles up to 8 tons per hour of PVC powder, with a conveying velocity carefully controlled between 10-15 m/s to prevent pipe wear and powder degradation.
The negative pressure centralized pneumatic conveying system in Da Nang consists of several key components: a rotary valve feeder at each pick-up point, a vacuum pump unit with a capacity of 2000 m³/h, a primary cyclone separator, a secondary bag filter for fine dust collection, and a diverter valve network for directing material to different production lines. The system is designed with redundancy in mind: two parallel vacuum pumps allow for continuous operation even during maintenance. The pipeline route includes multiple bends and vertical sections, which were carefully modeled using computational fluid dynamics (CFD) to minimize pressure drop and prevent material settling. The PLC controller, manufactured by a leading automation brand, interfaces with the factory's existing SCADA system, allowing operators to start, stop, and monitor the conveying process from a central control room. Safety features include pressure relief valves, emergency stop buttons, and an inert gas purging system to prevent PVC dust explosions. The entire system was fabricated in Headpowder's workshop in Shandong, China, and shipped to Da Nang in modular sections for easy on-site assembly.
The installation of the PVC powder negative pressure conveying system in Da Nang was completed over a period of six weeks, including foundation work, pipeline assembly, electrical wiring, and integration with existing equipment. The Headpowder field service team, led by experienced engineers from Shandong, provided on-site supervision and training to local operators. During commissioning, the system was tested under various load conditions, from 20% to 110% of the design capacity. The results showed that the actual conveying rate exceeded the guaranteed 8 tons per hour, with a power consumption of only 0.5 kWh per ton of material—significantly lower than the previous mechanical conveying system. Dust emissions measured at the pick-up points and receiver were below 0.5 mg/m³, far exceeding Vietnamese environmental standards. The system also demonstrated excellent reliability: after three months of continuous operation, no unplanned downtime was recorded, and the PVC powder particle size distribution remained unchanged, confirming the gentle handling capability of negative pressure conveying. The client reported a 40% reduction in labor costs and a 25% increase in overall production efficiency, thanks to the automated material supply.
Shandong Headpowder Engineering Co., Ltd. (Headpowder) is a trusted partner for pneumatic conveying solutions in Vietnam and across Southeast Asia. With over 15 years of experience in designing and manufacturing pneumatic conveying systems for powders and granules, Headpowder has completed numerous projects in Da Nang, Ho Chi Minh City, Hai Phong, and other industrial hubs. The company's expertise covers a wide range of materials, including PVC powder, calcium carbonate, silica, cement, and food ingredients. For negative pressure centralized pneumatic conveying, Headpowder offers complete turnkey solutions: from material testing and flow analysis to system design, fabrication, installation, and after-sales service. The company's factory in Shandong, China, is equipped with advanced CNC machinery and a dedicated testing laboratory, ensuring that every system meets strict quality standards. Headpowder's team of engineers can provide customized solutions tailored to the specific requirements of Vietnamese factories, including compliance with local electrical codes and safety regulations. The Da Nang case study is just one example of Headpowder's commitment to delivering reliable, efficient, and cost-effective pneumatic conveying systems for the PVC industry.
For more information about PVC powder pneumatic conveying systems, negative pressure centralized conveying, or any other bulk material handling solutions, please contact the Headpowder team. The project manager for the Da Nang case, Manager Zhang, is available to discuss your specific requirements and provide a free preliminary assessment. You can reach Manager Zhang directly via WeChat: 15662777102. Headpowder welcomes inquiries from Vietnam and other countries for pneumatic conveying projects, including new installations, system upgrades, and spare parts. The company's office is located in Shandong, China, and serves clients worldwide. Please feel free to contact Manager Zhang for a detailed quotation, technical consultation, or to arrange a visit to the Da Nang reference site.
The negative pressure centralized pneumatic conveying system installed in Da Nang, Vietnam, demonstrates the effectiveness of modern pneumatic conveying technology for PVC powder handling. The project has successfully eliminated dust pollution, improved material flow consistency, and reduced operational costs for the client. Shandong Headpowder Engineering Co., Ltd. continues to support Vietnamese manufacturers with advanced pneumatic conveying solutions, leveraging its technical expertise and manufacturing capabilities in Shandong, China. If you are considering a similar system for your PVC powder or other bulk materials, do not hesitate to contact Manager Zhang via WeChat: 15662777102. Headpowder is ready to help you achieve cleaner, safer, and more efficient material handling in your factory.
Shandong Headpowder Engineering Co., Ltd.
156-6277-7102（Manager Zhang） 
0531-83386006 
Jinan, Shandong Province, China 
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