Ratio-Pak Piston (Self-Vented) / MDPE / 600ml - 7661708

Product Name

Ratio-Pak Piston (Self-Vented) / MDPE / 600ml - 7661708

Brief Description

This product is a self-vented piston made of Medium-Density Polyethylene (MDPE), specifically designed for use with Nordson EFD's 600ml Ratio-Pak dual cartridge systems. It plays a crucial role in ensuring smooth, air-free dispensing of two-part materials by automatically venting trapped air during both the filling process and application.

Popular Applications & Uses

- Dispensing two-part adhesives, sealants, foams, coatings, and potting compounds.- Ensuring air-free packaging and application of reactive two-component materials.- Used as an integral component within Nordson EFD Ratio-Pak cartridges and compatible dispense guns.

Industries that Commonly Use It

- Aerospace/Defense- Automotive Service/Repair- Chemical Industry- Construction/ Building Services- General Manufacturing- LED/Electronics- Marine- Medical Device/ Prosthetics- Metal Fabrication- Packaging Services or Contractor- Plastic Fabrication

Special and Unique Features

- Self-venting design for air-free operation, which eliminates the need for shims or bleed plugs during piston insertion.- Constructed from MDPE (Medium-Density Polyethylene) for good chemical compatibility with a wide range of materials.- Specifically engineered for Nordson EFD Ratio-Pak dual cartridge systems, known for their snap-together design that allows for flexible mix ratios (from 1:1 up to 25:1) and various volumes.- Contributes to consistent pressure and flow, which is essential for high-precision dispensing applications.

Key Properties

- Material: MDPE (Medium-Density Polyethylene)- Volume Compatibility: Designed for 600ml Ratio-Pak cartridges.- Type: Self-Vented Rear Seal Piston.- Function: Ensures an airtight, leakproof seal within the cartridge.

Surface Compatibility

- Primarily compatible with polypropylene (PP) and nylon Ratio-Pak cartridges, which are common materials for the cartridge barrels themselves.- Designed to work effectively with a broad spectrum of two-part adhesives, sealants, foams, coatings, and potting compounds.- MDPE generally offers resistance to many chemicals, but specific material compatibility should always be verified against the dispensed fluid.

Known backups / known substitutes

- Nordson EFD offers non-vented MDPE pistons for Ratio-Pak cartridges, though these may require shims or bleed plugs for proper air removal during insertion.- Other piston types from Nordson EFD, such as Multi-Seal with Integral Center Bleed Plug Pistons or Solid Multi-Seal Pistons, may serve as alternatives depending on the specific cartridge system and application needs.- Pistons from alternative manufacturers designed for similar two-part cartridge systems could be considered, but direct compatibility with Nordson Ratio-Pak cartridges is not guaranteed.

Comparison Note

The self-vented MDPE piston provides a notable advantage over non-vented alternatives by automatically eliminating trapped air. This feature streamlines the filling process and ensures more reliable, on-ratio dispensing without the need for extra steps like inserting shims or bleeding plugs. This ultimately leads to enhanced productivity and reduced material waste in two-component dispensing applications.