We designed this Invacare Platinum 5 piston cup to restore peak operating pressure and airflow to Thomas 2650 and 2660 compressors. In addition, this precision replacement directly replaces OEM part numbers 624677 and 624786. Friction and continuous heat gradually wear down internal seals over time. Consequently, worn cup seals trigger low-oxygen alarms, cause sluggish pressure build-up, and create cylinder blow-by. Installing this precision PTFE cup seal (SKU: T-5002) quickly re-establishes a tight mechanical seal.

Invacare Platinum 5 Piston Cup Highlights

• OEM Cross-Reference: Directly replaces OEM part numbers 624677 and 624786, as well as factory cup seals in Thomas repair assemblies (SKU: T-5002).
• Direct Fitment: Engineered specifically for Thomas 2650 and 2660 compressor models used in Invacare Platinum 5 concentrators.
• Durable PTFE Material: Resists intense operating heat and friction for prolonged compressor service life.
• Restores Compression: Eliminates pressure drop across the cylinder head to ensure accurate sieve bed cycling.

Installation & Compressor Service Advice

First, inspect your cylinder sleeves when replacing this Invacare Platinum 5 piston cup. If the sleeve walls show scoring or deep ridges, a new piston cup cannot seal properly. In addition, Thomas 2650 and 2660 compressors operate with twin cylinder heads. Therefore, technicians always recommend replacing both piston cups at the same time to balance airflow. Furthermore, if you require a complete top-end overhaul, consider our full rebuild kit (TCK-2650/2660).