AquaMatic K520-RAV Seal Kit (Viton) for 1/2-Inch Diaphragm Valves

Ensure uncompromising fluid isolation and maximum chemical compatibility in your commercial water treatment systems with the Genuine AquaMatic K520-RAV Viton Seal Kit. Manufactured by AqMatic (formerly Pentair), this professional-grade preventative maintenance kit is engineered explicitly for the 1/2-Inch K520 Series Composite Body Diaphragm Valves.

By upgrading or replacing your standard elastomeric internals with premium FKM (Viton) elastomer, this kit provides exceptional resistance to harsh chemicals, aggressive acids, petroleum, deionized water, and elevated operational temperatures that destroy standard rubber components.

Key Features & Benefits

• Premium Viton (FKM) Material: Offers superior resistance against thermal degradation and chemical attack from ozone, chlorine, caustic substances, and industrial solvents.

• Prevents External & Bypass Leaking: Replaces the critical high-wear flexible components to maintain a drip-tight, leak-free seat seal and perfect chamber isolation.

• Engineered for K520 Series: Crafted to precise manufacturer tolerances for standard 1/2" composite valves, guaranteeing smooth stroke travel and an exact physical profile.

• Reduces Lifetime Maintenance Costs: Installing high-end Viton seals extends service intervals, minimizing the risk of unexpected breakdown and system downtime.

Comprehensive Kit Parts List

The K520-RAV Kit contains all the essential soft sealing elements needed to execute a comprehensive upper and lower chamber overhaul. Based on official manufacturer schematics, each kit includes:

• 1 x Viton Sealing Disc (Item No. 3): The primary seat seal that stops media flow securely when pressure is applied to the valve cap.

• 1 x Fabric-Reinforced Viton Diaphragm (Item No. 8): The flexible central pressure boundary engineered to isolate the control chambers while maintaining excellent cycle life. (1078047)

• 4 x Specialized Viton O-Rings (Item No. 6, 7, 9, 15): Precision dynamic and static O-rings required to seal the shaft, shaft guide body, and cap-to-body interface against high line pressures.

Technical Specifications

Recommended Tooling & Accessories

When disassembling composite body valves, precision is critical to safeguard internal thermoplastic threads. It is highly recommended to perform this seal replacement using the official AquaMatic 520-Z Assembly Tool, which securely locks into the internal shaft components to prevent stripping or fracturing.

Pro Maintenance Tip: If you discover heavy wear or scoring on the rigid internal plastic framework while replacing your seals, pair this kit with the K520-RFN Plastic Internal Parts Kit for a complete, factory-fresh valve rebuild.