Over 10,000+ customers' choice, Focus on screening industry 40+ years
As salt producers scale up, workshop layouts become more complex and material transfer distances continue to increase. The challenges of long‑distance conveying go far beyond simply "moving salt from point A to point B":
As conveying distance increases, traditional equipment efficiency drops significantly. Mechanical conveying equipment such as screw conveyors and bucket elevators perform adequately over short distances, but as conveying distance extends, equipment footprint increases dramatically, energy consumption rises, and maintenance points multiply. When crossing floors or navigating around equipment layouts, the limitations of traditional equipment become even more pronounced.
Material exposure risks increase during long‑distance transfer. The longer the conveying distance, the more opportunities material has to be exposed to the workshop environment – dust emission, foreign matter contamination, and moisture absorption leading to lumping all increase. For salt – a food ingredient consumed directly – each exposure is a quality risk.
The conflict between continuous feeding requirements and long‑distance conveying. Salt production typically runs 24/7 – upstream crystallisation and drying processes run continuously, and downstream packaging runs continuously. If long‑distance conveying equipment cannot achieve continuous, stable feeding, the rhythm of the entire production line is disrupted.
Salt dust corrosion intensifies with longer conveying distances. Salt is highly hygroscopic and corrosive. The longer the conveying distance, the longer the piping system, and the higher the risk of salt dust corrosion on pipe walls, bends, valves, and other components.
Gaofu's negative‑pressure salt vacuum conveyor uses the negative‑pressure vacuum conveying principle. A vacuum pump evacuates the system, creating a vacuum state. Salt particles are drawn into the suction nozzle with outside air, forming an air‑material mixture that travels through the enclosed conveying pipe to the hopper. After air‑material separation in the hopper, the separated material enters the receiving equipment.
The core advantage of this technical path is: salt no longer relies on mechanical transmission or manual handling – it is "automatically transported" to the target location through enclosed piping under negative‑pressure airflow. The entire conveying process takes place in a sealed system with no powder leakage.
Conveying distance breakthrough. Gaofu's negative‑pressure salt vacuum conveyor achieves conveying distances of 5 to 30 metres. For salt production workshops requiring multi‑floor or cross‑area transfer, this capacity covers the majority of long‑distance transfer scenarios. The equipment is not restricted by distance limitations and can complete powder conveying in confined spaces.
Continuous conveying capability. Conveying and discharge are controlled by pneumatic three‑way valves that open and close automatically, managed by a central control unit. Combined with a compressed air pulse‑jet cleaning system that automatically cleans the filter surface during each discharge cycle, the conveying process remains continuous and stable. This design enables long‑duration continuous operation without frequent maintenance stoppages.
Enclosed, dust‑free – complete isolation from external contamination. Fully enclosed pipe conveying means salt is isolated from outside air from the suction nozzle to the receiving equipment – dust‑free and leak‑free. For salt – a food ingredient with strict purity requirements – this design fundamentally eliminates dust emission and foreign matter contamination risks.
Gaofu's negative‑pressure salt vacuum conveyor's long‑distance continuous conveying capability comes from systematic design across multiple levels:
Power system – providing sufficient negative pressure for long‑distance conveying. The equipment uses a vacuum pump as the power source, with power covering 1.5 to 18.5 kW. Air supply pressure is 0.4 to 0.6 MPa. Sufficient negative pressure power is the foundation for long‑distance conveying – the longer the conveying distance, the higher the negative pressure requirement. Gaofu equipment, through proper power matching, ensures stable conveying capacity over distances of 5 to 30 metres.
Pulse‑jet cleaning system – ensuring uninterrupted long‑distance continuous operation. The equipment is equipped with a compressed air pulse‑jet cleaning device that blows back through the filters during each discharge cycle, dislodging powder adhering to the filter surface. This design ensures the filtration system remains efficient during long‑duration continuous operation – preventing negative pressure drop or conveying interruption caused by filter clogging.
Food‑grade stainless steel construction – salt‑corrosion resistant and hygienic. All parts that directly contact salt are made of food‑grade stainless steel – offering excellent corrosion resistance against salt material attack. In long‑distance conveying, the piping system has extensive and prolonged contact with salt – material corrosion resistance directly determines equipment service life and product quality.
Fully enclosed piping system – eliminating dust emission in long‑distance conveying. The entire conveying process takes place in a closed piping system – from suction nozzle to receiving equipment, with no leakage. In long‑distance conveying, the longer the piping system, the more potential leakage points – Gaofu equipment, through careful sealing design, ensures no dust emission even at conveying distances of up to 30 metres.
Controllable compressed air consumption. The equipment's compressed air consumption is 8 to 20 L/min – maintaining conveying capacity while keeping operating costs at a reasonable level.
Gaofu's negative‑pressure salt vacuum conveyor is used in the following long‑distance conveying applications in salt production workshops:
Multi‑floor conveying of refined salt. Enclosed conveying of refined salt from the drying stage on upper floors to the packaging stage on lower floors. Vertical conveying distance can reach 3 to 15 metres – with no dust emission throughout, ensuring finished salt purity.
Cross‑area feeding of industrial salt. Enclosed conveying of industrial salt from storage areas to production areas – horizontal conveying distance can reach 10 to 50 metres. Piping can be flexibly routed according to workshop layout, unrestricted by building constraints.
Long‑distance continuous feeding of finished salt. Continuous feeding from the drying stage to the packaging line over long distances – conveying capacity covers 200 to 6,000 kg/h. Combined with intelligent control systems, automated continuous feeding is achieved without manual attendance.
Centralised feeding to multiple workstations. A single vacuum conveyor can feed multiple workstations through branch piping, delivering salt to different locations. For salt production workshops with complex layouts, this design reduces the number of machines and maintenance points.
Gaofu's negative‑pressure salt vacuum conveyor's long‑distance continuous conveying capability delivers practical value for salt production workshops in multiple ways:
More flexible production line layout. Piping can be flexibly routed according to building structure, unrestricted by building constraints. Equipment is no longer limited by conveying distance – workshop layout can be more rationally planned, with drying, packaging, and storage processes distributed across different areas rather than crowded into the same space.
Significantly improved conveying efficiency. Automated continuous conveying replaces manual handling or intermittent mechanical conveying – a single machine can meet the long‑distance feeding requirements of the entire production line. Conveying capacity covers 200 to 6,000 kg/h, suitable for salt production of various scales.
Better product quality assurance. Fully enclosed pipe conveying keeps salt isolated from the outside environment throughout long‑distance transfer – eliminating dust contamination and foreign matter intrusion risks. For salt – a food ingredient consumed directly – this means product quality is protected at the transfer stage.
Markedly improved workshop environment. Enclosed pipe conveying completely eliminates dust emission – salt dust concentration in workshop air is significantly reduced. Walls and equipment surfaces no longer accumulate salt frequently, and cleaning cycles are significantly extended.
Effective control of operating costs. Automated conveying replaces manual handling – reducing labour costs. Enclosed pipe conveying reduces material loss during transfer. Stable equipment operation keeps maintenance costs controllable.
Food Industry Client Testimonials
Nestlé, CP Group, Haitian Flavour & Fragrance, Yihai Kerry, Yili, Mengniu,Shuanghui, Wahaha, Master Kong, Want Want, Anjoy Foods, Angel Yeast,Yangyuan Foods, Uni-President Enterprises, Qiaqia Food, Luhua Group,Alpenliebe, Golden Monkey, Orion, Xizhilang,Sanquan Foods, Synear Food, Oishi, Wong Lo Kat, Yanjing Beer, Seamild,Jinpai, Chubang, Hengshun Vinegar Industry, Longda Group, Beijing Daoxiangcun, Anhe Dairy,Weiwei Group, Xiangpiaopiao, Maiquer, Tianbing, Binqi Food, Ligao Okun
Fortune 500 Client Testimonials
CNPC、CSCEC、Sinochem Holdings、CRCC、China Minmetals Corporation、CNOOC、CR、Sinopharm、CHN Energy、COFCO Corporation、Huawei Technologies、PowerChina、CITIC Group、Wuchan Zhongda Group、NORINCO、Chalco、CNBM、 Shaanxi Coal and Chemical Industry Group、Ansteel Group、CETC、CSSC、CASC、CEC、Jinchuan Group、CASIC、Conch Cement、CNNC、SPH、Shanxi Coking Coal Group、 Zhongtai Chemical、GPHL、DEC、Sinosteel Corporation、MCC、China National Salt Industry Chemical、China Baowu Steel Group、China Animal Husbandry Industry Co., Ltd.、CECEP
About Gaofu
Xinxiang Gaofu Machinery Co., Ltd. was founded back in the 1980s. With over 40 years of development, it has been certified as a National-level Specialized, Refined, Unique & Innovative Little Giant Enterprise, National Green Factory, National High-tech Enterprise, and National Intellectual Property Advantage Enterprise, and serves as the President Unit of China Vibration Screening Industry Association.
The company is accredited with the Henan Provincial Industrial Design Center, Henan Provincial Engineering Technology Research Center for Intelligent On-line Screening System, and Xinxiang Municipal Engineering Technology Research Center for Fine Screening.
Gaofu has obtained more than 500 patents including invention patents, utility model patents and design patents, been awarded the Science and Technology Achievement Prize issued by the Ministry of Industry and Information Technology of China, and participated in drafting and formulating 4 national standards.
Gaofu's product portfolio covers multiple series and hundreds of specifications, including vibrating screening equipment, conveying equipment, coal crushing equipment, filtration equipment and automatic material handling systems.
Core products include vibrating screens, screening machines, vibratory sifters, rotary vibrating screens, ultrasonic vibrating screens, linear vibrating screens, airflow screens, gyratory screens, roller screens, dewatering screens, bar screens, vacuum feeding machines, dust-free feeding stations, bulk bag feeding stations, feeding systems, automatic powder feeding systems, automatic slag-discharging filters, leaf filters, clay filters, toothed roll crushers, coal crushers and other machinery.
These products are widely applied in food, pharmaceutical, chemical, metallurgy, construction materials, mining, thermal power, environmental protection and many other industries, winning recognition and trust from over 10,000 clients worldwide.
Gaofu products enjoy strong sales across Greater China, and are exported to more than 100 countries and regions such as Russia, Canada, the United States, New Zealand, Japan, Brazil and South Africa.
Upholding the corporate mission of Improving material quality & efficiency to fully satisfy customer demands, Gaofu maintains long-term partnerships with clients to achieve win-win development.
At present, Gaofu is an official qualified supplier for numerous Fortune Global 500 enterprises, including CNPC, Sinopec, Sinochem Holdings, China Resources Group, Sinopharm Group, COFCO, China National Building Material, China Aerospace Science and Technology Corporation, Jinchuan Group and more.
Gaofu Machinery ranks No.1 in global sales volume of vibrating screens.
In May 2024, Frost & Sullivan, a world-renowned international consulting firm, issued a Market Position Verification Certificate confirming that Gaofu achieved the world's largest shipment volume of vibrating screens in the global market in 2023.
