HPLC Pump Piston (sapphire plunger)

Pistons are, by design, a consumable part of the HPLC pump and should be replaced on a regular preventative maintenance schedule. To maintain peak performance and avoid unplanned downtime, sapphire pistons require inspection every six months with yearly or as-needed replacement. Optimize sapphire pistons offer optimal concentricity and resistance to wear. Each sapphire rod is specifically cut in relation to the grain of the crystal lattice, yielding maximal resistance to breakage and superior wear characteristics. Attachment of the rod to the piston ferrule is performed through a proprietary process ensuring concentricity. This is an important, often overlooked procedure parameter that has a direct effect on seal lifetime.

As a key consumable part of the HPLC pump, there are two kinds of pistons: transparent sapphire pistons and ceramic pistons. COE Optics can supply sapphire and ceramic pistons according to the customers' requirements.

As a reminder, all sapphire pistons and ceramic pistons should be replaced on a regular preventative maintenance schedule. To maintain peak performance and avoid unplanned downtime, sapphire pistons require inspection every six months with yearly or as-needed replacement.

COE Optics sapphire pistons offer optimal concentricity and resistance to wear. Each sapphire rod is specifically cut in relation to the grain of the crystal lattice, yielding maximal resistance to breakage and superior wear characteristics. Attachment of the rod to the piston ferrule is performed through a proprietary process ensuring concentricity.     

The combination of COE Optics sapphire pistons and seal has undergone extensive testing under temperature stress, with all common HPLC solvents, and in many instruments. More importantly, they yield consistent, reproducible results.