Velvac Inline Quick Release Valve-Tractor - 032020 User Manual

1. Product Overview

The Velvac Inline Quick Release Valve-Tractor, model 032020, is an essential component designed to enhance the efficiency of air brake systems in tractors and trailers. This valve is specifically engineered to speed up the release of trailer service brakes and parking brakes, contributing to safer and more responsive vehicle operation. Its durable construction ensures reliable performance in demanding environments.

Image 1.1: The Velvac Inline Quick Release Valve-Tractor, a compact and robust component designed for air brake systems.

Key Features:

• Compact Design: Measures 1-1/2" diameter x 3-1/2" long, allowing for easy integration.
• Gladhand Mounting: Designed to mount directly at the tractor gladhand for optimal performance.
• Enhanced Brake Release: Speeds up the release of trailer service brakes when installed on the service side gladhand and parking brakes when installed on the emergency side gladhand.
• Versatile Application: Suitable for use on double or triple trailers.
• Durable Construction: Features durable zinc die cast bodies for longevity.
• Optimized Flow Rate: Forward flow rate of 9.0 SCFM at 2 psi; Exhaust flow rate of 8.0 SCFM at 2 psi.
• Standard Connections: Equipped with 1/2"-14 MPT (Male Pipe Thread) with Vibraseal thread sealer on one end and 1/2"-14 FPT (Female Pipe Thread) on the other end.

2. Setup and Installation

Proper installation of the Inline Quick Release Valve is crucial for its effective operation and the safety of the vehicle. It is recommended that installation be performed by a qualified technician familiar with air brake systems.

Installation Steps:

1. Safety First: Ensure the vehicle's air system is completely depressurized before beginning installation. Chock wheels and engage parking brakes.
2. Identify Connection Points: Determine whether the valve will be installed on the service side gladhand (for service brake release) or the emergency side gladhand (for parking brake release).
3. Prepare Connections: The valve has a 1/2"-14 MPT end with pre-applied Vibraseal thread sealer and a 1/2"-14 FPT end. Ensure mating threads are clean and free of debris.
4. Mounting: Connect the appropriate end of the valve to the gladhand. The valve is designed to mount directly at the tractor gladhand.
5. Secure Connections: Tighten all connections securely to prevent air leaks. Do not overtighten.
6. System Check: Once installed, slowly repressurize the air system and check all connections for leaks using a soapy water solution. Correct any leaks immediately.
7. Functionality Test: Perform a functional test of the air brake system to ensure the quick release valve is operating as intended, speeding up brake release.

Image 2.1: The quick release valve is designed for heavy-duty vehicles like semi-trucks, improving brake system responsiveness.

3. Operating Instructions

The Velvac Inline Quick Release Valve operates automatically within the air brake system. Once correctly installed, it functions to rapidly exhaust air from the brake lines, thereby speeding up the release of the trailer's brakes.

Normal Operation:

• When the brakes are applied, air pressure builds in the lines.
• When the brakes are released, the quick release valve rapidly exhausts the air from the brake lines, allowing the trailer brakes to disengage more quickly than with standard systems.
• This rapid exhaust mechanism reduces brake drag and improves overall vehicle maneuverability, especially during coupling and uncoupling operations.

4. Maintenance

Regular maintenance ensures the longevity and optimal performance of your Velvac Inline Quick Release Valve. While the valve is designed for durability, periodic checks are recommended.

Maintenance Schedule:

• Monthly Inspection: Visually inspect the valve and its connections for any signs of damage, corrosion, or wear.
• Leak Detection: Periodically check for air leaks around the valve and its connections using a soapy water solution. Bubbles indicate a leak.
• Cleaning: Keep the exterior of the valve clean from dirt, grime, and road debris. Use a mild cleaner if necessary.
• Functionality Check: During routine vehicle maintenance, verify that the brakes release quickly and smoothly. Any sluggishness may indicate an issue with the valve or the air system.

Note: Do not attempt to disassemble the valve. If internal issues are suspected, replace the unit.

5. Troubleshooting

If you experience issues with your air brake system that you suspect are related to the quick release valve, refer to the following common problems and solutions.

If troubleshooting steps do not resolve the issue, consult a certified automotive technician or contact Velvac customer support.

6. Specifications

Detailed technical specifications for the Velvac Inline Quick Release Valve-Tractor, model 032020.

7. Warranty and Support

Velvac products are manufactured to high standards of quality and durability. For specific warranty information regarding the Inline Quick Release Valve-Tractor (032020), please refer to the warranty documentation provided with your purchase or visit the official Velvac website.

Customer Support:

If you have questions about installation, operation, or require technical assistance, please contact Velvac customer support through their official channels. Provide your product model number (032020) and any relevant purchase details when seeking support.

Image 7.1: Velvac products are designed for a range of heavy-duty and recreational vehicles, ensuring reliable performance.