Graco 25R638 Shaft, Reverse, 1/4"

The Graco 25R638 Shaft, Reverse, 1/4" is a genuine OEM replacement component engineered for Graco Precision Gear Metering (PGM) snuff-back dispense valves. It controls the reverse movement within the valve assembly to create the snuff-back action, helping prevent material dripping, stringing, and unwanted dispensing after each cycle. Manufactured to Graco's exact specifications, this shaft ensures reliable valve performance, consistent dispensing accuracy, and long service life.

Compatible Machines

Product Overview

Designed specifically for Graco PGM dispensing systems, the Graco 25R638 Shaft, Reverse, 1/4" plays a critical role in the valve's closing sequence. As the valve retracts, the reverse shaft helps create a snuff-back effect that minimizes material drool and improves dispensing precision. Using a genuine OEM replacement helps maintain system performance and reduces unnecessary downtime caused by worn internal components.

Key Features

Benefits

• Provides accurate reverse movement during valve operation.
• Creates an effective snuff-back action to reduce dripping and stringing.
• Helps maintain consistent dispensing performance.
• Precision-manufactured for proper fit and dependable operation.
• Ideal for maintaining the reliability of Graco PGM dispensing equipment.

Typical Applications

This reverse shaft is commonly used in Graco Precision Gear Metering systems designed for automated dispensing of sealants, adhesives, urethanes, silicones, and other medium- to high-viscosity materials where accurate material control is essential.

Technical Specifications

Frequently Asked Questions