Filson Filters have advanced manufacturing processes that follow strict ISO9001 standards. Several common production processes are listed below:

● Sintering

Sintering is a process where metal or plastic particles are heated to a temperature near their melting point, forming a solid matter under high temperature and pressure. Filson’s advanced sintering technology produces filters with high mechanical strength and precise pore sizes.

● Pleating

By uniformly folding filter media, the filtration area is significantly expanded and the dirt holding capacity is increased. Filson pleated filter cartridge can handle liquid flow rates of up to 500 GPM, while the pleated air filter allows for a maximum air velocity of 1275 CFM.

● Cutting

With fully automated cutting machines and advanced cutting technology, Filson produces filters with standard shapes, precise dimensions, and smooth edges. Additionally, we offer customization services for filters of various shapes.

● Welding

Having a variety of welding techniques including traditional welding, ultrasonic welding, and laser welding, etc., Filson filters feature smooth weld seams, complete structures, and 100% leak-free performance, ensuring that the filtration goes on smoothly.

● Painting

Typically, the exterior surface of Filson metal filter housings or pressure vessels needs to be evenly painted to isolate the material from direct contact with air, preventing corrosion and effectively extending the product’s lifespan. You can also choose the color of the paint.

Filson Filters have a wide range of raw materials, including metal, plastic and non-metallic materials.
● Metals: stainless steel 430, 304, 304L, 306, 316L, 2205, nickel, copper, carbon steel, titanium, Hastelloy C276 / 22, Monel, Inconel, or other alloy, etc.

● Plastics: PP(Polypropylene), polyester, PTFE, PVDF, PS(polystyrene), PE(polyethylene) or other polymers.

● Non-metal: glass fiber, nylon, cotton, ceramics, activated carbon, etc.

● Pharmaceutical: Removing contaminants, bacteria and impurities to ensure product purity and safety.
● Chemicals: Clarification and separation of chemicals help ensure product quality and conform to industry standards.
● Silence/Flame Retardant: sintered metal powder has a good role in absorbing noise, and its high temperature resistance also makes it have the function of flame resistance device.
● Food and Beverage: Remove impurities or bacteria to improve the safety and taste of products.
● Automobile: The oil, fuel and air in the car all need to be filtered to extend the service life of the engine and clean the air inside the car.
● Water Treatment: filter the impurities such as sediment, chemicals and microorganisms in the water to improve the utilization rate of water resources.
● Oil and Natural Gas: Remove solids, water, and pollutants from crude oil and natural gas.
● Power Generation: Cleanliness of the water in the cooling system is critical to the turbines and generators.

To ensure the quality of Filson Filters, we adhere to strict standards in both pre-production preparation and post-production inspection.

1. Pre-production Preparation
The raw materials for Filson Filters are sourced from globally renowned suppliers, ensuring high purity and excellent quality. The design of the drawings and the creation of molds are also crucial. We design 3D drawings entirely based on your requirements, create the molds accordingly, and proceed with mass production.

2. Post-production Testing
● Physical/Visual Inspection:
After production is completed, Filson assigns specialized personnel to inspect the product’s integrity and measure its dimensions for accuracy. If necessary, microscopes or other magnifying equipment are used to ensure the product is defect-free and meets specifications.

● Coating Testing

We will test painting material and thickness for each painting layer.

● Temperature Testing
The finished product is exposed to high or low temperatures to monitor whether it can maintain stable performance. Additionally, we repeatedly expose it to high and low temperatures to observe its ability to withstand repeated thermal stress.

● Leakage Testing
The airtightness of pressure vessels or large filtration equipment is crucial. Filson implements a series of measures, such as water spray test, to ensure that the product’s 100% sealed to prevent leaks.

● Material Testing
Filson has professional instruments, through the Positive Material Identification (PMI) method to verify whether the composition of the product materials is within the standard range.

● Chemical Testing
The product is exposed to specific chemicals, and its appearance and performance are monitored to determine its resistance to these substances.

● Pressure Testing
Filson uses pressure testing machines to check the filters before shipment to ensure good sealing and high strength. The test pressure is typically 1.5 times the working pressure and lasts for about ten minutes.

● Pore Size Testing
The pore size and uniformity of the filter are crucial for determining the size of captured impurities and the filtration efficiency. Therefore, Filson conducts rigorous testing of the pore size of the finished product, such as bubble point tests or using a Pore Size Analyzer.

● Polishing Treatment: Polishing treatment involves mechanically or chemically smoothing and shining the surface of filters to enhance their appearance and performance.
● Painting/Coating Treatment: By isolating the metal material from direct contact with air, our painting process prevents corrosion, effectively prolonging the lifespan of our filters.
● Acid Pickling Treatment: Immersing filters in acid solutions like hydrochloric or sulfuric acid removes surface scale, rust, or other impurities, enhancing cleanliness and corrosion resistance.
● Electroplating Treatment: Electrolytically depositing a metal layer onto filter surfaces improves corrosion, wear, and chemical resistance, enhancing both durability and appearance.
● Heat Treatment: Exposing products to controlled heating and cooling cycles improves material performance.

Filson provides replacement filters of world-renowned brands, which have the same construction and quality as the original products, and with more competitive prices and shorter lead times.

Alternative brands are Boll&Kirch, Hydac, Parker, Pall, Donaldson, Eaton, Filtrec, Mahle, MP Filtri, Argo Hytos, Hypro, Norman, Sofima, Vickers and so on. For more brands, please contact our sales staff by Clicking Here!

Filson always produces replacement filters by the same materials, sizes and workmanship as original filters, therefore it has the same or even superior quality.