Killark EY-50 EY Series Sealing Fittings Instruction Manual

1. Introduction

This manual provides essential information for the proper installation, function, and maintenance of the Killark EY-50 EY Series Sealing Fitting. The EY-50 is an aluminum hub sealing fitting designed for use in hazardous locations to prevent the passage of gases, vapors, or flames through conduit systems. Adherence to these instructions is crucial for ensuring safety and optimal performance.

2. Safety Information

• Installation and maintenance must be performed by qualified personnel in accordance with all applicable national and local electrical codes (e.g., National Electrical Code, NFPA 70).
• Ensure power is disconnected before beginning any installation or maintenance procedures.
• Use only approved sealing compounds specifically designed for hazardous location conduit seals.
• Verify the fitting's suitability for the specific hazardous location classification and environmental conditions.
• Do not modify the fitting in any way. Unauthorized modifications can compromise safety and void certifications.

3. Product Overview

The Killark EY-50 is a robust sealing fitting constructed from copper-free aluminum, designed for durability and resistance to corrosion. Its primary function is to create a barrier within a conduit system, preventing the spread of hazardous substances or ignition sources from one area to another.

An image displaying the brand name 'Killark' and the model number 'EY-50' on a two-tone background, representing the product.

4. Setup and Installation

1. Preparation: Ensure all conduit ends are clean, free of burrs, and properly threaded. Gather necessary tools and the appropriate sealing compound.
2. Thread Engagement: Thread the EY-50 fitting onto the conduit run, ensuring full thread engagement to achieve a secure mechanical connection.
3. Conductor Installation: Pull conductors through the fitting. Ensure there is sufficient space for the sealing compound to surround the conductors without excessive crowding.
4. Sealing Compound Application: Prepare the sealing compound according to the manufacturer's instructions. Pack the sealing compound firmly into the fitting's sealing chamber, ensuring it completely fills the chamber and surrounds all conductors. The compound must extend beyond the hub opening to form a complete seal.
5. Inspection: After the sealing compound has cured (refer to compound manufacturer's instructions for curing time), visually inspect the seal for any voids or cracks. A proper seal is critical for hazardous location integrity.
6. Tightening: Ensure all connections are tightened to the manufacturer's recommended torque specifications to maintain environmental integrity and electrical continuity.

5. Function

Once properly installed and sealed, the Killark EY-50 fitting functions as a critical safety component in hazardous location electrical systems. It creates a solid, impermeable barrier within the conduit, preventing the migration of flammable gases, vapors, or dusts, and containing any potential internal explosions within the sealed conduit section. This passive function is essential for maintaining the safety classification of the installation.

6. Maintenance

• Periodic Inspection: Regularly inspect the fitting and surrounding conduit for signs of physical damage, corrosion, or degradation of the sealing compound. The frequency of inspection should be determined by the operating environment and local regulations.
• Cleaning: Clean the exterior of the fitting as needed using a damp cloth. Avoid abrasive cleaners or solvents that could damage the finish or compromise the material integrity.
• Re-sealing: If the sealing compound shows signs of cracking, shrinking, or damage, the fitting must be re-sealed. This typically involves removing the old compound and applying new compound according to installation instructions. This procedure should only be performed by qualified personnel.
• Tightness Check: Periodically check the tightness of the conduit connections to the fitting to ensure they remain secure.

7. Troubleshooting

• Issue: Visible gaps or cracks in the sealing compound.
• Solution: This indicates an improper seal. The fitting must be re-sealed immediately by removing the old compound and applying new compound as per installation instructions. Ensure the compound is properly mixed and packed.
• Issue: Loose conduit connection to the fitting.
• Solution: Tighten the conduit connection to the recommended torque. If threads are damaged, the fitting or conduit section may need replacement.
• Issue: Corrosion on the fitting.
• Solution: While the aluminum is corrosion-resistant, severe environmental conditions can cause surface corrosion. Clean the affected area. If structural integrity is compromised, replace the fitting.

8. Specifications

9. Warranty and Support

Specific warranty details for the Killark EY-50 EY Series Sealing Fitting are not provided within this document. For comprehensive warranty information, technical support, or inquiries regarding product certifications and compliance, please refer to the official Killark website or contact Killark customer service directly. Always ensure you have the product model number (EY-50) and any relevant purchase details available when seeking support.