AquaMatic K521-RAV Viton Seal Kit | Part 1081795

The AquaMatic K521-RAV Seal Kit (Manufacturer Part Number: 1081795) is a high-performance, factory-original elastomer replacement kit designed specifically for AquaMatic K521 Series 1-inch composite body diaphragm valves.

This specialized RAV configuration features premium Viton (FKM) seals and components. It is engineered for valves operating in demanding environments that require superior thermal stability and exceptional resistance to aggressive chemicals, acids, petroleum products, and chlorinated water loops that rapidly degrade standard Buna-N or EPDM alternatives.

Parts Included List

The K521-RAV kit contains all the essential flexible sealing components required to perform a full fluid-end overhaul and eliminate internal or external leakage. It includes:

• Item 3 – Viton Valve Disc (1075841): The primary internal sealing face that shuts off flow against the valve seat.

• Item 13 – Viton Diaphragm (1075839): The flexible, high-tensile FKM actuator membrane that controls valve opening and closing.

• Item 14 – Viton O-Ring (1070104): Provides a high-integrity, chemical-resistant seal between the main valve body and the upper cap assembly.

Key Features & Benefits

• Premium Viton (FKM) Elastomers: Delivers outstanding resistance to acids, caustics, hydrocarbons, ozone, and high-temperature process water.

• Leaktight Performance: Restores factory-spec sealing integrity, preventing internal bypass, pressure loss, and external weeping.

• Perfect 1" Compatibility: Specifically moulded and cut to fit the internal geometries of the AqMatic / Pentair K521 composite valve series.

• Preventative Maintenance Essential: Replacing these wearable elastomeric parts during routine service intervals prevents costly unscheduled system downtime.

Technical Specifications

Target Applications

Because of its advanced fluoropolymer material profile, the K521-RAV kit is typically deployed in demanding industrial, municipal, and commercial water purification loops, including:

• Deionization (DI) regeneration systems utilizing concentrated acid or caustic cycles.

• Chemical dosing, injection, and chemical handling distribution lines.

• High-temperature process water applications.

• Water treatment loops with high residual chlorine or ozone levels.

Service Recommendation: When disassembling the valve to install the new Viton components, always inspect the internal structural stack. If the plastic shaft or guide shows signs of score marks or wear, consider pairing this kit with the K521-RFN Internal Parts Kit (1079621) and the 521-Z Assembly Tool (1075059) for a complete, professional-grade valve overhaul. Use a compatible, non-petroleum based lubricant on the cap O-ring if required by the system manual.