Designed for seamless compatibility with our advanced high-pressure candle filter configurations.
In high-performance polymer extrusion, particularly Spunbond and Meltblown nonwoven production, the melt filtration process determines ultimate product consistency and line longevity. Candle filters are the heart of the polymer filtration assembly, engineered to withstand extreme pressures and thermal loads. Without high-integrity melt filtration, micro-impurities, carbonized polymer gels, and particulate residues bypass the flow lines, resulting in compromised filament uniformity, spinneret nozzle clogging, and costly downstream production outages.
As an industry-leading China candle filters manufacturer and supplier, HG Nonwoven Machinery implements advanced metallurgic sintering and structural reinforcements to deliver continuous, zero-bypass filtration. Our custom-designed candle elements use multi-layered sintered stainless steel wire mesh and random metal fiber felt media. This configuration increases the effective surface filtration area up to 300% compared to conventional cylindrical designs, ensuring uniform flow distribution and optimizing shear-rate performance for high-viscosity resins like polypropylene (PP), polyethylene (PE), and polyester (PET).
Pujiang HG Nonwoven Machinery is a well-known nonwoven fabric making machine manufacturer since 2014, specializing in manufacturing high-performance, eco-friendly, and biodegradable spunbonded nonwoven fabric making machines with complete turnkey engineering services. By integrating advanced design concepts, such as our 5th Generation spunbond spinning technology from overseas, and refining them with autonomy for modern market demands, our machinery achieves low power consumption, convenient operation, high efficiency, and minimal production cost.
A key element of our 5th Generation technology is our high-capacity melt filtration system, featuring state-of-the-art candle filters. Our engineering team designs filtration assemblies that handle high throughput while minimizing pressure drops, providing stable spinning conditions even during high-yield industrial operations.
Engineered to optimize structural integrity and maintain strict filtration accuracy under extreme high-pressure environments.
Built with reinforced inner support cores made of perforated stainless steel tubes, preventing structural collapse under differential pressures exceeding 25 MPa.
Utilizes sintered metal fiber felt that allows for repeated thermal and chemical cleaning cycles (including vacuum pyrolysis and ultrasonic washing) without degrading pore distribution.
Custom thread and bayonet connectors paired with high-temperature metallic gaskets (such as copper, silver-plated, or soft iron gaskets) ensure absolute sealing performance at temperatures up to 380°C.
Optimizing manufacturing plants from installation and feasibility analysis to on-site technical support.
Our extrusion and filtration systems are designed to maximize throughput while minimizing energy consumption. By providing customizable configurations, we ensure that every candle filter housing matches your production line parameters, enhancing fiber quality and reducing raw material waste.
Leverage our extensive industry experience to validate new project investments. We supply thorough regional market analysis, projected capacity planning, and project feasibility reporting to ensure high ROI and smooth market entry.
Beyond melt spinning and polymer filtration systems, we deliver complete downstream auxiliary solutions. This includes nonwoven fabric slitting, scrap recycling machines, flexo printing units, lamination systems, and bag-making machinery.
We stand behind our equipment with 24-month warranties and comprehensive engineering support. Our technicians assist with on-site installation, operational training, and preventive maintenance routines to keep your lines running efficiently.
China's manufacturing sector provides significant cost-efficiency, technical expertise, and rapid prototyping capabilities. The industrial cluster in Pujiang, Zhejiang enables us to source raw materials, execute high-precision CNC micro-machining, and utilize vacuum sintering ovens within a highly integrated local ecosystem.
This proximity reduces lead times for complex candle filter assemblies, customized pressure housings, and specialized spinning components. By maintaining vertical integration over raw materials and utilizing advanced metallurgy processes, we pass these cost and efficiency benefits to our global partners without compromising technical specifications.
Operating under high melt pressures requires strict adherence to international safety and engineering regulations. Our manufacturing plants construct all high-capacity filter housings and pressure vessels in compliance with the ASME Boiler & Pressure Vessel Code (Section VIII), CE marking standards, and PED 2014/68/EU guidelines.
Every single candle filter bundle is subject to rigorous quality verification protocols, including non-destructive testing (NDT), ultrasonic crack detection, bubble point tests to verify micron ratings, and hydrostatic pressure testing at 1.5 times the maximum design pressure. This ensures leak-free operation, protecting workers and ensuring stable, long-term operations.
Discover how custom filtration accuracy supports critical applications in medical, hygiene, packaging, and agricultural sectors.
Non-woven fabric is essential in the hygiene sector, offering breathability, softness, and excellent fluid management for comfort and protection. It quickly absorbs liquid and keeps it away from the skin, making it ideal for paper diapers, incontinence pads, and feminine hygiene products.
Nonwovens fabrics are extensively used in the medical field and in protection against biological agents in other sectors. They deliver critical safety properties, such as prevention against infections and diseases. They are essential for making face masks, surgical gowns, bed sheets, and surgical towels, ensuring effective filtration, protection, and comfort.
Nonwoven fabric is ideal for a variety of packaging end-uses, as their exceptional lightweight, their energy-efficient production, shipping and storage, and their long life and robustness allow for two important features: volume reduction and re-usability. It widely used for shopping bags, fruit bags, garment bags, rice bags, pocket springs, garment interlining, as well as packaging for pharmaceuticals and cosmetics, among other applications. Its versatility and long lifespan contribute to its popularity in various industries.
Agriculture Non Woven Fabric allow air and water to pass through while providing wind and cold protection by generating a microclimate around the crop. Furthermore, because nonwoven works as a physical protection media, it can assist prevent damage to crops, vegetables, and seeds from insects and birds. Nonwoven materials can assist regulate heat, UV blocker agriculture, while also providing superior air and water permeability. These materials are lightweight, portable, and may be tailored to match specific needs and provide specific services.
Modern spunbond and meltblown lines require zero-downtime operations. To support continuous run times, HG Nonwoven Machinery integrates **Duplex Candle Filter Systems** into our production lines. These systems feature two identical filter chambers connected by a 3-way diverter valve. When the operating filter chamber reaches its maximum differential pressure limit ($\Delta P \approx 5-8 \text{ MPa}$), the operator shifts flow to the standby chamber without interrupting production.
To extend the service life of candle elements, we suggest implementing vacuum pyrolysis cleaning cycles. The contaminated candle filters are placed in a vacuum furnace where high heat under vacuum breaks down the polymer residues into gases. This is followed by chemical washing and ultrasonic treatments to restore the filter elements' porosity to near-OEM levels, reducing long-term operational costs.
Below, review the technical parameters of our high-pressure filter units:
| Filter Element Material | Filtration Rating (μm) | Operating Temp (°C) | Max Operating ΔP (MPa) |
|---|---|---|---|
| Sintered Metal Fiber Felt | 3 - 40 μm | Up to 380°C | 25 MPa |
| Sintered Stainless Wire Mesh | 20 - 150 μm | Up to 400°C | 30 MPa |
| Pleated Sintered Metal Mesh | 10 - 100 μm | Up to 380°C | 20 MPa |
Finding the optimal balance between cost, throughput, and filtration accuracy is critical for maximizing productivity. Over-specifying filtration accuracy (e.g., using a 5μm filter where a 40μm filter is sufficient) leads to premature pressure buildup and frequent cleaning intervals. Conversely, under-specifying can lead to filament breaks and spinneret damage.
At HG Nonwoven Machinery, we consult with clients to identify their exact operational parameters before recommending a filter design. This customized approach ensures that the filter elements, housings, and diverter valves match your specific resin grade and production requirements.
We employ automated plasma-arc welding systems to construct the seam welds on our filter elements. This technique prevents weld decay and ensures structural integrity during high-pressure thermal processing. Our design practices ensure compliance with global engineering codes, providing reliable operation under challenging manufacturing conditions.
Technical answers regarding the selection, operation, and maintenance of industrial candle filters.
Explore our technical configurations, turnkey nonwoven production lines, and extrusion setups.
HG NONWOVEN