The Model 455 dispensing valve is a pneumatically operated, normally closed pinch valve with a disposable fluid path. It was designed to dispense a variety of medium to high viscosity light-curable adhesives, inks, and cyanoacrylates with extreme precision. The valve's micrometer control feature allows users to precisely adjust the material flow, ensuring that materials are dispensed consistently and accurately.

The Model 455's disposable fluid path carries materials from the material reservoir to the dispense tip. Fluids are sealed within the fluid path, preventing contact with the valve's inner components and ensuring a contaminate-free dispensing process. The fluid path is easy to replace and requires minimum clean-up, allowing for rapid material changeover.