Shimadzu Suction Filter Stainless Steel Total of 3 Sealed Filters

The Shimadzu 228-45707-91 Suction Filter Element is a high-quality, improved stainless steel suction filter element designed to protect High-Performance Liquid Chromatography (HPLC) systems from particulate contamination. Located at the end of the mobile phase intake tubing, this filter acts as the first line of defense, ensuring that only clean, debris-free solvent enters the pump. This "improved" version is specifically engineered to reduce the formation of air bubbles in the inlet line, a common cause of pressure fluctuations and baseline noise.

Technical Performance and Design

• Particulate Protection: Features a high-porosity stainless steel frit that effectively traps dust and undissolved particles from the mobile phase before they can reach the pump check valves.

• Bubble Mitigation: The improved design minimizes outgassing and the accumulation of micro-bubbles, which helps maintain prime and ensures consistent flow rates.

• Universal Fitting: Designed for a "push-fit" connection; simply insert the existing FEP or PTFE tubing into the integrated port. No additional nuts or ferrules are required for installation.

• Chemically Inert: Constructed from 316-grade stainless steel and high-grade fluoropolymers for excellent resistance to a wide range of HPLC solvents and buffers.

Product Specifications

• Part Number: 228-45707-91

• Material: Stainless Steel (Filter Element) with PTFE/PE port

• Compatibility: Supported across a wide range of Shimadzu systems including:

  • LC-40 (Nexera series)

  • i-Series (Integrated systems)

  • LC-20 (Prominence series)

  • LC-10 and LC-30 series

• Replacement For: Directly replaces older part numbers 228-43342-92 and 228-21984-01.

• Connection Size: Optimized for standard 1/8-inch (3.0 mm) OD or 1.5 mm ID tubing.

Operational Advantages

• Extended Component Life: By preventing particulates from entering the system, this filter significantly extends the life of expensive pump seals and check valves.

• Easy Maintenance: The filter is easily accessible for visual inspection and can be replaced in seconds without the need for specialized tools.

• Stable Baseline: Improved solvent filtration directly contributes to a more stable detector baseline by reducing pump-induced pulsations caused by air or debris.

• Reliable Priming: Especially recommended for use when air bubbles are repeatedly generated in the inlet tube or when standard cleaning of old filters is no longer effective.