ASCO 306-633 Rebuild Kit

The ASCO 306-633 Rebuild Kit is a critical maintenance solution for field technicians servicing ASCO 8040 Series solenoid valves. Specifically engineered for 2-way direct-acting gas shutoff valves with AC coils—including models 8040G021, 8040G022, and 8040G023—this OEM-spec kit restores factory-level sealing and response times. Each kit includes high-wear internal components such as the diaphragm assembly, bonnet gasket, main body gasket, piston U-cup lip seal, and retaining ring, ensuring a complete seal overhaul. Designed for high-cycle industrial and combustion control applications, this ASCO valve repair kit eliminates common failure points like internal leakage or slow actuation caused by degraded elastomers. By utilizing genuine ASCO replacement parts, contractors ensure full compatibility with the original valve body and maintain the integrity of fluid control systems handling air, inert gas, or light oil. This heavy-duty rebuild bundle is the professional choice for extending the service life of 8040 Series gas valves without the cost of full unit replacement.

Key Benefits

• Solenoid Valve Restoration: Restores original performance parameters for ASCO 8040 Series AC-rated valves.
• Complete Component Kit: Includes diaphragm, gaskets, springs, and seals required for a comprehensive overhaul.
• OEM Compatibility: Precision-fit components designed for Grainger items 4ELZ5, 5LU23, and 5LU24.
• Industrial Durability: Optimized for high-frequency combustion control and HVAC fluid control systems.
• Prevention of Downtime: Replacing high-wear parts proactively prevents catastrophic valve failure and pilot gas leakage.

Common Questions

How do I know if the ASCO 306-633 is compatible with my valve?
Always check the nameplate on the valve body. This kit is specifically for 8040 Series valves with AC coils. If your model ends in G021, G022, or G023, this is the correct technical match.

What is included in the 306-633 seal kit?
The kit contains the diaphragm assembly, disc holder, piston U-cup lip seal, spring, retaining ring, and all necessary gaskets (bonnet and main body) to ensure a bubble-tight seal.

Can this kit be used for DC-powered valves?
No, the ASCO 306-633 is engineered specifically for AC-operated solenoid valves. For DC configurations, a different rebuild kit with a specific solenoid base sub-assembly is required.

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.

This item is not eligible for free shipping.