Nordson EFD offers three types of pistons for use with our cartridge systems – AF (Air Free) Pistons, Multi-seal with Integral Center Bleed Plug Pistons, and Solid Multi-Seal Pistons.
Pistons are inserted after the cartridge has been filled with two-component adhesives. Each design has its own unique way of removing the air between the piston and the adhesive, which is critical to dispense accuracy.
AF (Air Free) Pistons
Unique AF self-venting pistons combine excellent chemical compatibility with an airtight, leakproof seal to ensure safe shipment and exceptional shelf life.
Save time and effort. AF pistons eliminate the need to insert shims or bleed plugs during the packaging process. A unique plug in the center of the piston automatically closes when all air has been removed and the entire piston face contacts the material.
- Eliminates trapped air
- No need for shims or secondary plugging operations
- On-ratio dispensing
- Fast, fool-proof operation
- Compatible with most adhesives and sealants
AF pistons are available in 50mL, 200mL, and 300mL cartridges.
Multi-Seal with Integral Center Bleed Plug Pistons
These pistons include a useful feature that bleeds air from the cartridge during piston insertion without a shim, making the process easier and more efficient. They are available in 50mL, 200mL, 300mL, 400mL, and 600mL cartridges.
Solid Multi-Seal Pistons
These pistons require a shim to allow entrapped air to bleed past the pistons during insertion. They are available in 200mL, 300mL, 400mL, 600mL, and 1500mL cartridges.
Pistons can be assembled with O-rings on request.