The product
The orifice flow meter is a differential pressure-based instrument designed to measure the flow of gases, steam, and liquids in pipelines. It is widely used for process control and measurement in industries such as oil and gas, chemical processing, metallurgy, power generation, heating, and water supply.
The throttling device (orifice plate) is part of a differential pressure flow measurement system, consisting of a primary element (orifice plate) and a secondary device (differential pressure transmitter and flow indicator). It is known for its simple structure, easy maintenance, and stable performance.
Working principle
As the fluid flows through the pipe and passes the orifice plate, a local restriction is created, causing an increase in flow velocity and generating a pressure difference between the upstream and downstream sides.
Based on known parameters and applying the continuity equation and Bernoulli’s principle, the relationship between differential pressure and flow rate can be established, allowing accurate flow calculation.
Product features
- Simple, robust, and reliable structure
- Low cost and long service life
- Designed according to international standards
- Wide application range: suitable for single-phase flow and some multiphase conditions
- No need for real-flow calibration when using standard devices
- Easy installation, especially in integrated versions
- Direct connection to pressure transmitters
- Intelligent differential pressure sensor (monocrystalline silicon)
- High accuracy with self-diagnostic capability
- Adjustable range via programming
- Simultaneous display of instantaneous and total flow, pressure, and temperature
- Real-time and dynamic compensation
- Multiple communication interfaces
- High stability
- Typical turndown ratio up to 10:1
Technical performance
- Accuracy: ±1.0%
- Stability: better than 0.1% FS
- Continuous operation without recalibration for up to 5 years
- Minimal influence from temperature and static pressure
- Pressure resistance up to 42 MPa
Technical parameters
- Measured media: Water, steam, oil, and compressed gases
- Measurement diameter: 50 to 1200 mm
- Fluid temperature: -50°C to +550°C
- Measurement accuracy: Class 1
- Signal output: 4–20 mA
- Power supply: DC 14V to 25V
- Nominal pressure: PN ≤ 40 MPa
Applications
- Oil and gas
- Chemical industry
- Metallurgy
- Power generation
- Heating systems
- Water supply
