III. Feature Description

• Integrated Pressure Monitoring: Equipped with a differential pressure gauge and needle valve, real-time monitoring of pressure differences across the filter basket. When impurities accumulate, the pressure difference increases, prompting timely cleaning—avoiding blind maintenance and reducing the risk of system blockage or pressure drop.
• Efficient Filtration with Full-Area Design: The filter basket adopts a full filtration area (larger than the pipeline cross-section), ensuring sufficient contact between gas/fluid and the sieve. This design enhances impurity interception efficiency (≥95% for particles larger than the mesh size) while minimizing pressure loss (≤5% of system pressure), maintaining stable flow rates.
• Easy Maintenance: The middle cover features a quick-opening structure; removing the cover allows direct access to the filter basket (equipped with a lifting handle). Impurities trapped in the basket can be removed or cleaned without disassembling the entire pipeline, reducing maintenance time by 40-60% compared to traditional strainers.
• Fabricated Structure Advantages: Unlike cast strainers, the fabricated design (assembled via welding pre-cut steel plates/pipes) allows for larger sizes (up to DN1000) and better structural uniformity. This is critical for high-pressure gas pipelines, where casting defects (e.g., pores) could lead to gas leakage or structural failure.

IV. Manufacturing Process

• Material Preparation: Steel plates/pipes (WCB, stainless steel) or cast iron are cut to precise dimensions using CNC cutting machines, ensuring component compatibility during assembly.
• Structural Welding: The shell, flange ends, and cover frame are welded using TIG (for stainless steel) or MIG (for carbon steel) welding. Welds are polished to a smooth finish to reduce gas/fluid turbulence and prevent corrosion.
• Filter Basket Fabrication: 304 stainless steel sheets are perforated into porous sieves with uniform mesh sizes (customized by impurity size). The sieve is formed into a basket shape and welded to a support frame with a lifting handle for easy extraction.
• Pressure Monitoring Assembly: The differential pressure gauge and needle valve are calibrated and installed on the shell, with pressure ports connected to the upstream and downstream of the filter basket to ensure accurate pressure difference measurement.
• Quality Inspection: Each strainer undergoes hydrostatic testing (15kgf/cm² for 10K, 30kgf/cm² for 20K) to check for leaks. The filter basket is tested for strength to ensure it does not deform under rated pressure, and the differential pressure gauge is verified for accuracy.