Achieve more consistent dispensing of viscous fluids

Made from a pliable material, the solution allows the inserted piston to flex under pressure. It is this that creates the tight seal between the piston and barrel. Preventing piston separation and bounce (pulsing), the seal stops air from passing by the piston during dispensing. In order to reduce costly fluid waste, the piston fits tightly enough into the syringe barrel to maintain excellent barrel wall wiping throughout the dispensing cycle.

Offering improved strength, clarity and chemical compatibility, the clear flex material is suited for a variety of assembly fluids ranging from adhesive dispensing to lubrication systems. It is particularly effective for dispensing highly viscous or filled materials, such as greases, pastes or solder paste, where piston bounce is a known issue.

Brian Dodier, Global Product Line Manager, Nordson EFD, comments: "Entrapped air is the leading cause of piston bounce in air pulse pressure dispensing. In piston bounce conditions, micro-bubbles and air pockets can surface between the piston and fluid. As this air builds, a lack of positive compression is created on the fluid. When this pressure releases, excessive material can be dispensed leading to inconsistent deposits. The Optimum Clear Flex Piston minimises piston bounce by preventing air from becoming entrapped."