Sealing Gasket Series for HPLC and GC Systems

Overview

The Sealing Gasket Series by ZHONGKEHUIFEN is a precision-engineered family of chromatographic consumables designed specifically for high-pressure liquid chromatography (HPLC), ultra-high-performance liquid chromatography (UHPLC), and gas chromatography (GC) systems. These gaskets serve as critical interface components between injection ports, column fittings, detector cells, and autosampler vial caps—ensuring leak-tight integrity under dynamic pressure conditions ranging from ambient to 1000 bar (14,500 psi) in modern UHPLC platforms. Constructed using chemically inert, thermally stable polymer formulations—including fluorinated elastomers (e.g., FKM/Viton®), perfluoroelastomers (FFKM), and PTFE-reinforced composites—the series maintains dimensional stability and compression set resistance across wide temperature gradients (–60 °C to +250 °C), preventing analyte loss, baseline drift, or system downtime caused by microleaks or outgassing.

Key Features

• Chemical compatibility validated against common HPLC mobile phases (acetonitrile, methanol, aqueous buffers, TFA, HFIP) and GC carrier gases (He, H₂, N₂) and solvents (hexane, chloroform, DCM)
• Controlled durometer (Shore A 70–90) and controlled compression modulus to ensure consistent sealing force without over-torquing fragile stainless-steel or PEEK fittings
• Tight dimensional tolerances (±0.02 mm on inner/outer diameters and thickness) achieved via CNC-machined tooling and ISO 9001-certified cleanroom assembly
• Low extractables profile verified per USP and cytotoxicity testing; compliant with ICH Q5A(R2) guidelines for leachable risk assessment in regulated bioanalysis
• Traceable lot numbering with CoA (Certificate of Analysis) including material certification, hardness test records, and visual inspection reports

Sample Compatibility & Compliance

These gaskets are compatible with all standard chromatographic hardware interfaces—including Waters, Agilent, Shimadzu, Thermo Fisher, and PerkinElmer systems—as well as OEM-specific geometries such as 1/4-28 UNF, 10-32 UNF, and M7×0.5 metric thread fittings. Each batch undergoes functional validation using helium leak detection (sensitivity ≤5 × 10⁻⁹ mbar·L/s) and pressure hold testing at 1.5× maximum operating pressure for 30 minutes. The series conforms to ISO 8536-4 (glass containers and stoppers for pharmaceutical use), ASTM D1418 (rubber nomenclature), and supports GLP/GMP laboratory compliance when integrated into documented change control and inventory management workflows.

Software & Data Management

While physically passive components, the Sealing Gasket Series integrates seamlessly into digital lab infrastructure through ZHONGKEHUIFEN’s traceability platform. Each product package includes a QR code linking to an online portal hosting electronic CoAs, RoHS/REACH declarations, and regulatory summaries. For laboratories implementing LIMS or ELN systems (e.g., LabWare, Benchling, Veeva), gasket lot data can be imported via CSV or API endpoints to support audit-ready material history tracking—fully aligned with FDA 21 CFR Part 11 requirements for electronic records and signatures.

Applications

• Preventing solvent leakage and pressure decay in HPLC/UHPLC autosampler needle seats and column oven inlet/outlet ferrules
• Maintaining inertness and minimizing bleed in GC inlet liners, septa carriers, and detector base gaskets (e.g., FID, TCD, ECD)
• Ensuring reproducible injection volume accuracy in quantitative bioanalysis (e.g., PK/PD studies per FDA Bioanalytical Method Validation Guidance)
• Supporting method transfer between labs by eliminating variability introduced by inconsistent sealing performance
• Extending service life of expensive analytical columns and detectors through elimination of contamination pathways

FAQ

Are these gaskets suitable for use with aggressive solvents like trifluoroacetic acid (TFA) or hexafluoroisopropanol (HFIP)?
Yes—FKM- and FFKM-based variants demonstrate proven resistance to TFA (≤0.1% v/v) and HFIP at ambient temperatures; full chemical compatibility tables are available upon request.
Do you provide custom gasket geometries or materials for non-standard instrument interfaces?
ZHONGKEHUIFEN offers OEM co-development services, including CAD-based design review, prototype sampling, and small-batch production under NDA.
What documentation accompanies each shipment?
Every order includes printed CoA, RoHS/REACH statement, and material safety data summary; electronic versions are accessible via secure client portal.
How should gaskets be stored to maintain performance integrity prior to installation?
Store in original packaging at 15–25 °C, away from ozone sources, UV exposure, and direct contact with hydrocarbon oils or plasticizers.