Custom Stainless Steel Sintered Felt Welded Filter Element

1. Petrochemical and Energy Industry (One of the Core Application Scenarios)

• Specific Applications:
  • Lubricating oil/hydraulic oil filtration (e.g., lubricating oil circuits of compressors, steam turbines, and gearboxes; pressure oil/return oil filtration in hydraulic systems);
  • Fuel oil/diesel filtration (e.g., pre-treatment of fuel for diesel generators and oil-fired boilers to remove mechanical impurities and metal debris from the oil);
  • Filtration of chemical process fluids (e.g., intermediate filtration of corrosive media such as organic acids, alkaline solutions, and solvents to prevent impurities from affecting reaction efficiency or damaging equipment).
• Suitable Environments:
  • Temperature range: -20°C ~ 200°C (stainless steel sintered felt offers better temperature resistance than ordinary polymer filters; some high-specification models can withstand temperatures above 300°C);
  • Pressure range: 0.1 ~ 3.0 MPa (the all-welded stainless-steel structure resists high pressure, and the internal threaded connections ensure reliable sealing to prevent leakage);
  • Medium properties: Resistant to strong corrosive or high-viscosity media such as acids, alkalis, organic solvents, and mineral oils, with no risk of leaching (avoids contaminating chemical products or lubricating oil).

2. Machinery Manufacturing and Equipment Lubrication Systems

• Specific Applications:
  • Return oil filtration in hydraulic systems of heavy machinery (e.g., excavators, cranes);
  • Lubricating oil filtration for machine tool spindles (e.g., CNC machines, machining centers);
  • Oil filtration in wind power equipment (gearboxes, hydraulic stations) (must withstand low outdoor temperatures and dusty environments, while the filter requires long-term stable operation).
• Suitable Environments:
  • Vibration/impact environments: The all-stainless-steel structure resists vibration, preventing filter deformation or cracking (superior to plastic or glass fiber filters);
  • Dusty outdoor/workshop environments: Internal threaded connections enable tight pipeline integration, reducing the infiltration of external dust. Meanwhile, the “depth filtration” structure of sintered felt efficiently captures dust and metal shavings mixed in the oil.

3. Food, Beverage, and Pharmaceutical Industries (Compliance-Critical Scenarios)

• Specific Applications:
  • Filtration of food-grade fluids (e.g., removal of impurities and particles from raw materials during the production of edible oils, fruit juices, and beer to prevent clogging of subsequent equipment);
  • Pre-treatment of “purified water/injection water” in the pharmaceutical industry (or 药液 filtration, which must comply with food-grade/pharmaceutical standards such as 3A and FDA). The all-stainless-steel structure has no hygiene dead spots and can be sterilized at high temperatures.
• Suitable Environments:
  • Hygienic requirements: The all-stainless-steel welded structure has no joint dead spots and can be sterilized by steam (121°C high temperature) or cleaned chemically (e.g., nitric acid, sodium hydroxide solutions) to prevent microbial growth;
  • No secondary contamination: Stainless steel does not react with food/pharmaceutical liquids and has no leachables from polymer materials, complying with food safety or pharmaceutical GMP (Good Manufacturing Practice) standards.

4. Water Treatment and Environmental Protection Industries (Pollution Resistance/Cleanability Scenarios)

• Specific Applications:
  • Pre-treatment of industrial wastewater (e.g., removal of metal particles and suspended solids from wastewater to protect subsequent reverse osmosis membranes or water pumps);
  • Filtration of circulating water systems (e.g., cooling circulating water, central air-conditioning circulating water to remove scale and microbial slime, reducing pipeline clogging and equipment corrosion);
  • Treatment of oil-containing wastewater (e.g., machine tool emulsion, mechanical cleaning wastewater to filter impurities from oil and enable oil recovery and reuse).
• Suitable Environments:
  • Humid/corrosive water environments: Stainless steel (e.g., 304, 316L grades) resists water corrosion, preventing filter rust and failure;
  • High-pollution loads: The “three-dimensional porous structure” of sintered felt provides strong dirt-holding capacity (3~5 times higher than ordinary woven mesh) and can be reused after backwashing or ultrasonic cleaning, reducing replacement costs.

5. Compressed Air and Gas Filtration

• Specific Applications:
  • Precision filtration of compressed air (e.g., compressed air for pneumatic equipment and spray coating processes to remove oil mist, moisture, and solid particles, avoiding impacts on product quality or damage to pneumatic components);
  • Filtration of inert gases (e.g., nitrogen, argon) (e.g., protective gases in welding and electronics industries to remove impurity particles from the gas).
• Suitable Environments:
  • High-pressure gas environments: Internal threaded connections ensure tight pipeline integration, and the all-stainless-steel structure resists gas pressure impacts with no leakage risk;
  • Low-temperature/high-temperature gases: Tolerates low temperatures (e.g., -10°C) during compressed air drying or high temperatures (e.g., 150°C) of industrial gases, maintaining stable filtration performance.

II. Core Functions (Why Choose These Filters?)

1. Precision Filtration to Protect Downstream Equipment
   Stainless steel sintered felt offers controllable filtration precision (1~100 μm, customizable per requirements), enabling efficient interception of solid particles, metal shavings, and impurities in the medium. This prevents contaminants from entering downstream equipment such as pumps, valves, sensors, and precision instruments, reducing equipment wear, clogging, or malfunctions and extending equipment service life.
2. Resistance to Harsh Conditions to Improve System Reliability
   The all-stainless-steel welded structure and internal threaded connections allow the filter to withstand high temperatures, high pressures, strong corrosive media (e.g., acids, alkalis, organic solvents), and vibration impacts. Compared to plastic or glass fiber filters, it is more adaptable to harsh industrial environments, reducing the risk of production downtime caused by filter failure.
3. Reusability to Reduce Long-Term Costs
   Stainless steel sintered felt supports backwashing (high-pressure water/gas backflushing), ultrasonic cleaning, and chemical immersion cleaning (e.g., dilute nitric acid, alcohol). After cleaning, its filtration performance can be restored to over 80%, eliminating the need for frequent filter replacement (unlike ordinary disposable filters). It is particularly suitable for high-pollution, high-flow scenarios, lowering long-term operating costs.
4. Compliance and Safety
   All-stainless-steel materials (especially 316L) comply with compliance standards such as food-grade (FDA), pharmaceutical-grade (GMP), and chemical industry (ASME BPE). They have no material leachables, do not contaminate filtered oil, water, food, or pharmaceutical liquids, and ensure product quality and production safety.

Summary