Hy-Pro VDR50 Control Unit Instruction Manual

1. Introduction

The Hy-Pro VDR50 Control Unit is a robust pressure regulator specifically designed for direct mounting onto compatible Hypro diaphragm pumps. This unit is engineered to manage fluid flow and pressure efficiently, ensuring optimal performance of your pumping system. It is capable of handling flow rates up to 35 GPM and pressures up to 725 psi. This manual provides essential information for the safe and effective installation, operation, and maintenance of your VDR50 Control Unit.

Figure 1: Hy-Pro VDR50 Control Unit. This image shows the complete control unit with its various components, including the pressure gauge and outlet ports.

2. Safety Information

Always observe safety precautions when working with hydraulic equipment. Failure to follow these instructions may result in personal injury or equipment damage.

• Read and understand this manual completely before installation or operation.
• Ensure all connections are secure and leak-free before operating the system.
• Wear appropriate personal protective equipment (PPE), such as safety glasses and gloves.
• Do not exceed the maximum rated pressure or flow rate of the unit or the connected pump.
• Depressurize the system before performing any maintenance or adjustments.
• Keep children and unauthorized personnel away from operating machinery.

3. Product Features

The Hy-Pro VDR50 Control Unit is equipped with several key features for effective pressure regulation and system control:

• Directly mounts onto Hypro D503, D703, D904, D813, D1064, and D1265 Diaphragm Pumps.
• Integrated pressure gauge for real-time pressure monitoring.
• One adjustable high-pressure relief valve for precise pressure control.
• One bypass lever for diverting flow.
• Two 1/2" HB outlets with individual shut-off valves.
• One 1" HB bypass connection.
• Maximum flow capacity of 35 GPM.
• Maximum pressure rating of 725 PSI.

4. Setup and Installation

Proper installation is crucial for the performance and longevity of the VDR50 Control Unit.

1. Mounting to Pump: Ensure the Hypro diaphragm pump is securely mounted and depressurized. Align the VDR50 Control Unit with the designated mounting points on the pump. Secure the unit using appropriate fasteners, ensuring a tight, leak-free connection. Refer to your pump's manual for specific mounting instructions if necessary.
2. Connecting Inlet: The VDR50 unit is designed for direct mounting, so its inlet is integrated with the pump's outlet. Verify this connection is sealed.
3. Connecting Outlets: Connect your application hoses to the two 1/2" HB outlets. Use hose clamps or other suitable connectors to ensure secure and leak-free connections. These outlets have individual shut-off valves.
4. Connecting Bypass: Connect a return hose from the 1" HB bypass port back to your supply tank or reservoir. This bypass line is essential for diverting excess flow when the pressure relief valve is active or when the bypass lever is engaged.
5. System Check: Before starting the pump, double-check all connections for tightness and ensure there are no obstructions in the lines.

5. Operating Instructions

Follow these steps for safe and effective operation of your VDR50 Control Unit:

1. Initial Startup: With all connections secure and the system filled with fluid, start the pump. Observe the pressure gauge on the VDR50 unit.
2. Adjusting Pressure: The VDR50 features an adjustable high-pressure relief valve. To adjust the system pressure, turn the adjustment knob (or screw) on the relief valve. Turning clockwise typically increases pressure, while counter-clockwise decreases it. Adjust gradually while observing the pressure gauge until the desired operating pressure is achieved.
3. Using Bypass Lever: The bypass lever allows for quick diversion of flow back to the tank, effectively reducing pressure to the outlets without changing the relief valve setting. Engage the lever to bypass flow, and disengage to resume flow to the outlets.
4. Utilizing Shut-off Valves: The two 1/2" HB outlets are equipped with individual shut-off valves. These can be used to independently control flow to connected devices or lines. Turn the valve handles to open or close the flow.
5. Monitoring: Continuously monitor the pressure gauge during operation to ensure the system is running within safe and desired parameters.

6. Maintenance

Regular maintenance ensures the longevity and reliable performance of your VDR50 Control Unit.

• Daily/Before Use: Inspect the unit and all connections for visible leaks, damage, or loose fittings. Ensure the pressure gauge is functioning correctly.
• Weekly/Regularly: Clean the exterior of the unit to prevent dirt and debris buildup. Check the bypass lever and shut-off valves for smooth operation.
• Annually/As Needed: Inspect internal components if accessible and recommended by the manufacturer (refer to Hypro service manuals for detailed procedures). Replace worn seals or O-rings as necessary to prevent leaks and maintain pressure integrity.
• Winterization: If operating in freezing conditions, ensure the unit and connected pump are properly drained or protected with antifreeze to prevent damage from ice expansion.

7. Troubleshooting

Refer to the following table for common issues and their potential solutions:

8. Specifications

9. Warranty and Support

For warranty information, technical support, or to order replacement parts, please contact Hypro customer service or your authorized Hypro dealer. Keep your purchase receipt and model number (9910-VDR50) handy when contacting support.

Visit the official Hypro website for the most current contact information and product resources.