Ratio-Pak Piston (Non-Vented) / MDPE / 200ml - 7661403

Product Name

Ratio-Pak Piston (Non-Vented) / MDPE / 200ml - 7661403

Brief Description

This product is a non-vented piston made from Medium Density Polyethylene (MDPE), specifically designed for use with Nordson EFD Ratio-Pak 200ml dual cartridge systems. It plays a crucial role in the precise and leak-proof dispensing of two-part (2K) materials such as adhesives, sealants, foams, coatings, and potting compounds. The piston ensures smooth material movement within the cartridge, preventing air tunneling and minimizing waste.

Popular Applications & Uses

- Dispensing two-component adhesives and sealants in assembly processes.- Packaging and applying foams, coatings, and potting compounds.- Used in manufacturing for precise fluid application.- Critical component in multi-ratio dispensing systems for various industrial applications.

Industries that Commonly Use It

- Chemical Industry (for fluid formulators).- Construction/Building Services (for sealants and adhesives).- Electrical Services or Products (for macro-electronic assembly, cable coating).- Energy (e.g., solar panel manufacturing).- General Manufacturing (for assembly fluids and lubricants).- LED/Electronics (for precision fluid dispensing in PCB manufacturing and electronic assembly).- Medical Device/Prosthetics (for medical and hygiene disposable production).- Mold Making/Casting (for potting compounds).- Packaging Services or Contractor (for packaging and dispensing two-part materials).- Transportation/Specialty Vehicle (e.g., EV battery assembly, automotive applications).

Special and Unique Features

- Non-vented design for specific fluid types or applications requiring external venting.- Made from MDPE, offering good chemical resistance and durability.- Designed for Nordson EFD's patented Ratio-Pak snap-together cartridge system, allowing flexible mix ratios and volumes.- Ensures smooth piston travel and leak-proof performance within the cartridge.- Helps prevent air tunneling and reduces material waste.

Key Properties

- Material: Medium Density Polyethylene (MDPE).- Volume: Designed for 200ml cartridges.- Type: Non-Vented rear seal piston.- Density: 0.926–0.940 g/cm³.- Chemical Resistance: Superior chemical resistance.- Impact Resistance: Good shock and drop resistance.- Stress Cracking Resistance: Better than HDPE, less notch sensitive.- Temperature Resistance: -50°C to +90°C.- Flexibility: More flexible than HDPE, stiffer than LDPE.- Surface: Characterized by a matt surface and high strength.

Surface Compatibility

- The MDPE piston is chemically resistant and compatible with a wide range of two-component materials typically dispensed by Ratio-Pak systems, including various adhesives, sealants, foams, coatings, and potting compounds.

Known backups / known substitutes

- Nordson EFD offers self-vented pistons for Ratio-Pak cartridges for applications where venting is required directly through the piston.- Other Nordson EFD dispensing system components, such as pistons for Side x Side or Coaxial cartridges, depending on the dispensing system used.- Pistons made from different materials (e.g., HDPE or Nylon) for specific chemical compatibility requirements with other cartridge types.- Alternative 2K dispensing system pistons from other manufacturers.

Comparison Note

This non-vented MDPE piston is an integral part of the Nordson Ratio-Pak system, which stands out for its unique snap-together cartridge design, enabling flexible mix ratios (1:1 up to 25:1) and volumes. While other Nordson EFD pistons exist (e.g., self-vented), this non-vented version is chosen for applications where the material or dispensing process requires a sealed piston, often paired with external venting solutions or for specific material viscosities. Its MDPE construction provides a balance of flexibility, chemical resistance, and durability, making it suitable for a broad spectrum of industrial 2K fluid applications.