1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the Belimo F650HD+ARB24-MFT-5 Butterfly Valve. Please read this manual thoroughly before attempting to install or operate the device. Retain this manual for future reference.
2. Safety Information
Always observe local regulations and safety standards during installation and operation. Failure to follow these instructions may result in property damage, injury, or death.
- Ensure power is disconnected before any installation, maintenance, or troubleshooting.
- Installation and servicing should only be performed by qualified personnel.
- Wear appropriate personal protective equipment (PPE).
- Verify correct voltage and wiring connections to prevent electrical hazards.
- Do not exceed the specified pressure or temperature ratings of the valve.
3. Product Overview
The Belimo F650HD+ARB24-MFT-5 is a 2-inch, 2-way butterfly valve designed for precise flow control in various industrial applications. It features a robust stainless steel exterior finish and is equipped with a 24V Multi-Function Technology (MFT) actuator for versatile control.

Figure 1: Belimo F650HD+ARB24-MFT-5 Butterfly Valve with attached actuator. The image shows the valve body, the shaft, and the electronic actuator unit mounted on a bracket above the valve.
Key Features:
- Valve Type: Butterfly, 2-way
- Size: 2 Inches
- Cv Rating: 115
- Actuator: Non-Spring Return, 24V MFT (Multi-Function Technology)
- Connection Types: Flange (Inlet), NPT (Outlet)
- Exterior Finish: Stainless Steel
4. Setup and Installation
Proper installation is crucial for the valve's performance and longevity. Follow these steps carefully:
- Preparation: Ensure the pipeline is clean and free of debris. Verify that the valve's specifications match the system requirements.
- Mounting Position: Install the valve in an accessible location, allowing sufficient space for maintenance and actuator access. The valve can be mounted in any orientation, but horizontal piping with the stem in a horizontal position is often preferred for optimal performance.
- Mechanical Installation: Connect the flanged inlet and NPT outlet to the corresponding pipeline sections. Use appropriate gaskets and fasteners, tightening them evenly to prevent leaks. Do not overtighten.
- Electrical Wiring: Connect the 24V power supply and control signals to the MFT actuator according to the wiring diagram provided with the actuator. Ensure all connections are secure and insulated. Refer to the actuator's specific manual for detailed wiring instructions.
- Initial Check: After installation, perform a visual inspection to confirm all connections are secure and there are no visible damages.
5. Operating Instructions
The Belimo F650HD+ARB24-MFT-5 valve is controlled by its 24V MFT actuator. The MFT actuator allows for various control strategies, including proportional, floating, and on/off control, depending on its configuration.
- Power On: Apply 24V power to the actuator. The actuator will typically perform a self-calibration or move to its default position.
- Control Signal: Provide the appropriate control signal (e.g., 0-10V, 2-10V, or digital input) to the MFT actuator to command the valve's position.
- Manual Override: If equipped, use the manual override feature on the actuator for manual positioning during commissioning or in case of power failure. Refer to the actuator manual for specific instructions on manual override.
- Monitoring: Observe the valve's operation and system flow to ensure it is functioning as intended.
6. Maintenance
The Belimo F650HD+ARB24-MFT-5 valve and actuator are designed for minimal maintenance. Regular inspections are recommended to ensure optimal performance.
- Visual Inspection: Periodically check for any signs of leakage, corrosion, or damage to the valve body, connections, and actuator housing.
- Actuator Functionality: Verify that the actuator moves smoothly through its full range of motion and responds correctly to control signals.
- Connection Integrity: Ensure all electrical and mechanical connections remain tight and secure.
- Cleaning: Keep the exterior of the valve and actuator clean from dust and debris. Do not use harsh chemicals.
- Lubrication: The valve and actuator are generally maintenance-free and do not require lubrication under normal operating conditions.
7. Troubleshooting
This section provides guidance for common issues. For complex problems, contact qualified service personnel.
| Problem | Possible Cause | Solution |
|---|---|---|
| Valve does not move | No power to actuator; Incorrect wiring; Actuator fault | Check power supply; Verify wiring connections; Consult actuator manual for diagnostics. |
| Valve leaks | Improper installation; Damaged seals/gaskets; Overtightened connections | Re-check flange/NPT connections; Inspect and replace seals/gaskets if damaged; Ensure proper torque. |
| Inaccurate flow control | Incorrect actuator calibration; Debris in valve; Control signal issue | Recalibrate actuator; Inspect valve for obstructions; Verify control signal integrity. |
| Actuator makes unusual noise | Mechanical obstruction; Internal wear | Inspect valve for obstructions; Contact Belimo support if noise persists. |
8. Specifications
Detailed technical specifications for the Belimo F650HD+ARB24-MFT-5 Butterfly Valve:
| Specification | Value |
|---|---|
| Brand | Belimo |
| Model Number | F650HD+ARB24-MFT-5 |
| Valve Type | Butterfly Valve |
| Number of Ports | 2 |
| Size | 2 Inches |
| Cv Rating | 115 |
| Actuator Type | Non-Spring Return, MFT |
| Voltage | 24V |
| Inlet Connection Type | Flange |
| Outlet Connection Type | NPT |
| Exterior Finish | Stainless Steel |
| Item Package Quantity | 1 |
| ASIN | B00COLWM2C |
| Date First Available | October 31, 2023 |
9. Warranty and Support
Belimo products are manufactured to high-quality standards and typically come with a manufacturer's warranty. For specific warranty terms and conditions, please refer to the official Belimo website or the documentation included with your purchase. For technical support, service, or replacement parts, please contact your authorized Belimo distributor or visit the official Belimo support portal.





