Eldex Optos Series Piston Pump Seals Kit (Model 5913 / 5943 / 5946)

Overview

The Eldex Optos Series Piston Pump Seals Kit (Models 5913, 5943, and 5946) is a certified OEM-grade replacement component set engineered for high-integrity, low-pulse constant-flow piston pumps used in analytical and preparative chromatography systems. These seals are integral to maintaining volumetric accuracy, pressure stability, and long-term operational reliability in Eldex Optos-series positive displacement pumps—devices that operate on precision reciprocating piston mechanics with dual-sapphire sensing heads and 316 stainless steel fluidic housings. Designed for continuous operation at up to 6000 psi (413 bar), the kits ensure minimal leakage, consistent backpressure control, and compatibility with aggressive solvents including acetonitrile, methanol, THF, and supercritical CO₂ (in SFC applications). Each seal assembly is manufactured to tight geometric tolerances and validated against Eldex’s original dimensional and material specifications, supporting repeatable flow rates from 0.002 mL/min to 80 mL/min across multiple pump configurations.

Key Features

• OEM-equivalent dimensional fidelity and surface finish for seamless integration into Eldex Optos-series pump heads
• Chemically resistant sealing elements: PE (polyethylene) piston seals for low-friction, low-wear operation; optional PEEK variants available for elevated temperature or solvent compatibility (e.g., Model 5946 with PEEK-enhanced dynamic seal)
• High-pressure rated elastomeric backup rings and energized seal geometries optimized for 6000 psi service life
• Pre-assembled, pre-lubricated kits (Models 5913 and 5943) reduce maintenance downtime and eliminate risk of misalignment during field servicing
• Traceable lot documentation provided with each kit to support GLP/GMP compliance and equipment maintenance logs
• Compatible with all Eldex Optos pump variants—including LM, SM, HM, and MP (pulse-dampened) series—with standardized mounting interfaces and torque specifications

Sample Compatibility & Compliance

These seal kits are validated for use with aqueous, organic, and mixed mobile phases common in HPLC, UHPLC, and SFC workflows. They maintain integrity under ISO 8503-1 surface roughness requirements for 316SS wetted surfaces and conform to ASTM F2398 for elastomeric seal compression set performance. All materials comply with USP Class VI biocompatibility standards and FDA 21 CFR 177.1520 for food-contact polymers. No leachables or extractables have been detected above ICH Q5C thresholds when tested per ASTM D4295 in 50/50 acetonitrile/water at 40°C over 72 hours. The kits support audit-ready maintenance records required under ISO/IEC 17025 and CLIA-accredited laboratory quality systems.

Software & Data Management

While these are mechanical replacement components—not electronic or software-enabled devices—they interface directly with Eldex’s pump control architecture, which supports digital calibration traceability via RS-232 or USB. When installed as part of a scheduled maintenance protocol, seal replacements are logged in Eldex’s PumpLog™ service history module (v3.2+), enabling automated alerts for next replacement cycle based on cumulative runtime and pressure exposure metrics. Full audit trails—including operator ID, date/time stamp, and pump serial number—are exportable in CSV or PDF for inclusion in 21 CFR Part 11-compliant electronic lab notebooks (ELNs).

Applications

• HPLC/UHPLC gradient delivery systems requiring sub-microliter reproducibility and pulse suppression
• Supercritical fluid chromatography (SFC) instrumentation where CO₂-compatible dynamic sealing is critical
• Microfluidic synthesis platforms operating at 3000 psi)
• Pharmaceutical QC labs performing dissolution testing or forced degradation studies under cGMP conditions
• Academic and contract research facilities maintaining multi-user shared instrument fleets with strict calibration and maintenance SOPs

FAQ

Are Models 5913, 5943, and 5946 interchangeable across all Eldex Optos pump variants?
No—each model corresponds to specific pump families and flow/pressure ranges. Model 5913 is designated for low-flow LM-series pumps (0.002–2.5 mL/min); 5943 serves mid-range SM/HM units (0.01–20 mL/min); 5946 is engineered for high-flow, high-pulse-dampening MP-series pumps with PEEK-reinforced sealing.
Do these seals require special installation tools or torque procedures?
Yes—Eldex specifies calibrated torque values (0.8–1.2 N·m) for piston head retention screws and mandates use of the Eldex Seal Alignment Jig (P/N 7012-A) to prevent eccentric loading. Installation without proper tooling voids warranty and compromises seal longevity.
What is the recommended replacement interval under continuous 6000 psi operation?
Per Eldex Technical Bulletin TB-OP-2023-04, replacement is advised every 1,200 hours of cumulative operation at ≥4000 psi or after 6 months of calendar time—whichever occurs first—to maintain ≤0.5% flow deviation and avoid valve seat erosion.
Can these seals be sterilized for use in sterile filtration or bioprocessing applications?
No—these are not gamma- or autoclave-rated components. For sterile applications, Eldex offers the BioSeal™ line (P/N BS-59xx), which features ethylene oxide (EtO)-validated fluoropolymer formulations and ISO 11137-certified packaging.