Description
Crane DM900 Flow Measurement Device (FMD) – Stainless Steel
High-Accuracy Flow Measurement Device for HVAC Hydronic Systems
The Crane Fluid Systems DM900 Flow Measurement Device (FMD) is a precision-engineered stainless steel flow measurement device designed for accurate flow verification and hydraulic balancing in commercial and industrial HVAC systems. It can be installed as a standalone flow measurement unit or close-coupled with regulating and isolating valves, providing reliable differential pressure measurement during system commissioning and maintenance. The DM900 complies with BS 7350:1990 and is available in sizes DN20 to DN600 with a PN25 pressure rating.
Key Features
- Precision Flow Measurement Device (FMD)
- Manufactured from stainless steel
- Available in DN20–DN600
- Pressure rating: PN25
- Operating temperature: −10°C to +120°C
- Designed for installation between PN10, PN16, or PN25 flanges
- Square-edged stainless steel orifice plate for accurate flow measurement
- Two stainless steel extension tubes fitted with Crane P84 Pressure Test Points
- Flow measurement accuracy of approximately ±5% at normal operating velocities
- WRAS approved (DN65–DN150 models)
- Suitable for commissioning, balancing, and flow verification in hydronic systems.
Benefits
Accurate Hydraulic Commissioning
The DM900 enables engineers to accurately measure differential pressure and calculate system flow rates, allowing HVAC systems to be commissioned quickly and balanced with confidence. The fixed stainless steel orifice delivers repeatable measurement performance throughout the service life of the installation.
Flexible Installation
The device can be installed independently or directly adjacent to regulating or isolating valves, making it suitable for both new installations and retrofit projects. It is compatible with PN10, PN16, and PN25 flanged systems.
Durable Stainless Steel Construction
Manufactured entirely from corrosion-resistant stainless steel, the DM900 is designed for long-term operation in demanding heating and chilled water applications. Stainless steel extension tubes and integrated P84 pressure test points provide reliable performance and easy access during maintenance.
Typical Applications
The Crane DM900 is ideal for:
- Commercial HVAC systems
- Chilled water distribution
- Heating water systems
- District heating and cooling
- Data centres
- Hospitals
- Universities
- Office buildings
- Industrial process cooling
- Commissioning and balancing of hydronic networks.
Technical Specifications
| Specification | Value |
|---|---|
| Model | DM900 |
| Product Type | Flow Measurement Device (FMD) |
| Material | Stainless Steel |
| Size Range | DN20–DN600 |
| Pressure Rating | PN25 |
| Temperature Range | −10°C to +120°C |
| Measurement Accuracy | ±5% (typical) |
| Pressure Test Points | Crane P84 |
| Installation | Between PN10 / PN16 / PN25 Flanges |
| Standard | BS 7350:1990 |
| Application | Flow Measurement & Hydraulic Balancing |
Why Choose the Crane DM900?
The Crane DM900 Flow Measurement Device provides an accurate, robust, and cost-effective solution for measuring flow in hydronic systems. Its stainless steel construction, precision orifice plate, and compatibility with Crane balancing equipment make it an excellent choice for HVAC commissioning engineers seeking reliable and repeatable flow measurement. Whether installed as a standalone device or integrated with balancing valves, the DM900 helps improve hydraulic performance, reduce commissioning time, and optimise energy efficiency.
