Description
Crane DA941 Fixed Orifice Double Regulating Valve (FODRV) – Ductile Iron
High-Accuracy Balancing Valve for Large HVAC Hydronic Systems
The Crane Fluid Systems DA941 Fixed Orifice Double Regulating Valve (FODRV) is a premium balancing valve designed for flow measurement, regulation, and isolation in medium and large hydronic heating and chilled water systems. Featuring an integral fixed orifice within a robust Y-pattern globe valve body, the DA941 delivers highly accurate and repeatable flow measurement while simplifying system commissioning and maintenance.
Manufactured from ductile iron and supplied with ANSI Class 125 flanged connections, the DA941 is suitable for demanding commercial and industrial applications where dependable hydraulic balancing and long-term durability are essential. Its fixed-orifice design provides ±5% flow measurement accuracy at all valve positions, offering greater precision than conventional variable-orifice balancing valves.
Key Features
- Fixed Orifice Double Regulating Valve (FODRV)
- Sizes DN65 – DN300 (2½” – 12″)
- Ductile Iron body construction
- ANSI Class 125 flanged connections
- Operating temperature: 10°C to 120°C
- Integral fixed orifice for accurate flow measurement
- Double regulating function with preset memory
- Flow measurement accuracy of ±5% at all valve positions
- Suitable for regulation, isolation, and commissioning
- BIM, CAD and technical documentation available.
Benefits
Superior Flow Measurement Accuracy
The integral fixed orifice allows precise differential pressure measurement regardless of valve opening position, ensuring reliable commissioning and long-term hydraulic performance.
Preset Memory Function
After balancing the system, the valve can be closed for maintenance and reopened to its original preset position without requiring the system to be recommissioned.
Reduced Installation Cost
The fixed-orifice design combines flow measurement, regulation, and isolation into a single valve, reducing the number of separate fittings, joints, and potential leakage points.
Durable Construction
The ductile iron body offers excellent mechanical strength and corrosion resistance, making the valve suitable for large commercial HVAC installations and industrial process systems.
Typical Applications
The DA941 is widely used in:
- Commercial office buildings
- Hospitals
- Hotels
- Shopping centres
- Airports
- Universities
- District heating systems
- District cooling plants
- Central chilled water plants
- Data centres
- Industrial process cooling systems
- Injection and bypass circuits requiring precise balancing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product | DA941 Fixed Orifice Double Regulating Valve |
| Valve Type | Fixed Orifice Double Regulating Valve (FODRV) |
| Material | Ductile Iron |
| Size Range | DN65 – DN300 |
| Pressure Rating | ANSI Class 125 |
| Temperature Range | 10°C to 120°C |
| Connection | ANSI Class 125 Flanged |
| Flow Measurement Accuracy | ±5% (all valve positions) |
| Flow Measurement | Integral Fixed Orifice |
| Functions | Flow Measurement, Regulation & Isolation |
Why Choose the Crane DA941?
The DA941 is engineered for engineers and commissioning specialists who require maximum balancing accuracy in large hydronic systems. Compared with variable-orifice balancing valves, the fixed-orifice design provides more consistent flow measurement, faster commissioning, and improved long-term system stability.
Its combination of high-accuracy flow measurement, preset double regulation, and durable ductile iron constructionmakes the DA941 an ideal solution for modern HVAC installations where energy efficiency and hydraulic performance are critical.
