ASCO 304-089 Rebuild Kit

The ASCO 304-089 Rebuild Kit is a comprehensive maintenance solution engineered specifically for ASCO 8344 4-way solenoid valves. This factory-authorized kit is essential for restoring the integrity of 3/8-inch NPT pilot-operated valves used in demanding pneumatic and hydraulic control circuits. Designed to handle AC voltage configurations, the kit includes precision-machined internal components such as high-grade NBR (Nitrile) diaphragms and O-rings, ensuring excellent chemical resistance and seat tight shut-off. Utilizing a genuine ASCO spare parts kit prevents pressure drop issues and restores the snap-acting performance required for high-cycle industrial automation. Technicians should verify the serial number on the existing ASCO RedHat valve to ensure compatibility with the 8344 series piston-style construction. Replacing worn seals and springs with this kit maintains the original CV flow coefficient and prevents costly downtime caused by internal leakage or sticking spool assemblies in critical fluid power applications.

Key Technical Benefits

• OEM Precision: Includes all necessary NBR seals and hardware to restore ASCO 8344 series solenoid valves to original specifications.
• Fluid Compatibility: Engineered for air, inert gas, and water service, providing reliable sealing across standard industrial temperature ranges.
• Cycle Reliability: High-tensile stainless steel springs and reinforced diaphragms ensure repeatable 4-way directional control.
• Easy Installation: Designed for rapid field service to minimize system depressurization time during solenoid valve maintenance.

Common Technical Questions

Does this kit work for DC voltage valves?
The ASCO 304-089 is specifically calibrated for AC-powered 8344 valves; using it in DC configurations may result in improper spring tension and seating issues.

What is the primary indicator that the rebuild kit is needed?
Internal bypassing between ports or an audible "humming" from the solenoid coil typically indicates worn piston seals or debris in the pilot assembly.

Are tools included in the kit?
No, this is a repair parts kit only; standard technician tools and compatible lubricant are required for the installation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.