Roots Flow Meter
The Roots flow meter is a type of positive displacement flow meter. It features novel design, aesthetic appearance, and rational structure. Characteri...
Key Features
Performance Metrics
| Accuracy Class | 0.5级, 0.2级 |
| Flow Range | m³/h |
| Connection Type | Flange connection (can be customized as required) |
| Remote Display & Field Explosion-proof Rating | Ex db IICT6 Gb; Ex tb IICT85℃ Db |
Key Features
The Roots flow meter, also known as a rotary displacement flow meter, is a highly accurate positive displacement flow meter designed for precise volumetric flow measurement of liquids and gases in pipeline systems. Its robust design and reliable performance make it a preferred choice for critical applications in industries like petrochemicals, natural gas distribution, and fine chemicals.
Roots Flow Meter Working Principle
The Roots flow meter operates on a positive displacement principle. Its measurement chamber contains a pair of precisely intermeshing rotors that rotate alternately under the pressure difference between the inlet and outlet.
Each complete rotation of the rotors discharges a fixed, known volume of fluid. By counting the number of rotations, the total volumetric flow is accurately calculated, providing a direct and reliable measurement method for fluid flow rate.
Robust Structural Composition
The key components of a Roots flow meter include the metering chamber, the rotors, drive gears, a sealed coupling, and a counting or display unit. The metering chamber houses the rotors where the actual fluid displacement occurs.
Synchronized by drive gears, the rotors' rotation is transmitted via the sealed coupling to the external display unit. This unit processes the signal to visually present the instantaneous and totalized flow rate, ensuring accurate data output.
Key Features and Performance of Roots Flow Meters
High Accuracy
Maintains accuracy levels of ±0.5% or better across a wide flow range, ideal for trade settlement and process control.
Strong Adaptability
Measures diverse fluids from high-viscosity oils to low-viscosity water and gases, with good tolerance to impurities.
Wide Turndown Ratio
Offers a high turndown ratio (e.g., 10:1), providing stable and accurate measurement even with significant flow variations.
Roots Meter Types and Material Selection
The AL-type cast iron Roots meter is widely used for measuring various oil products and liquids non-corrosive to cast iron, offering durability and cost-effectiveness.
For high-pressure applications, the EL-type cast steel Roots meter is designed for low-corrosivity media. The LL-type cast aluminum lightweight model is ideal for low-viscosity, low-pressure fluids, ensuring a compact and easy-to-handle solution.
Versatile Application Scenarios for Flow Measurement
In the petrochemical industry, Roots flow meters provide accurate measurement of crude oil, refined products, and chemicals, forming the basis for process control and custody transfer. They are equally critical in natural gas transmission systems for precise gas flow metering and trade settlement.
Industries with extreme demands for accuracy, such as fine chemicals and pharmaceuticals, rely on the excellent repeatability of Roots meters for precise batching and control of raw material and product flow rates.
Product Characteristics and Advantages
The positive displacement measurement principle guarantees high accuracy and excellent repeatability. Its compact and lightweight structure simplifies installation and reduces maintenance requirements.
With suitability for a wide range of oil and liquid media, the application fields are extensive. Optional features like remote signal transmission and explosion-proof certification allow these meters to adapt to complex and demanding industrial environments seamlessly.
Technical Specifications Overview
| Parameter | Description / Value |
|---|---|
| Type | Positive Displacement (Rotary Displacement) |
| Typical Accuracy | ±0.5% or better |
| Turndown Ratio | Up to 10:1 or higher |
| Fluids Measured | Liquids (water, oils, chemicals) & Gases |
| Material Variants | AL (Cast Iron), EL (Cast Steel), LL (Cast Aluminum) |
| Key Features | High Accuracy, Compact, Wide Fluid Compatibility, Optional Remote/Explosion-proof |
Ideal for Demanding Industrial Environments
The Roots flow meter stands out as a reliable and accurate solution for volumetric flow measurement where data integrity is paramount. Its design prioritizes durability, adaptability, and ease of use.
From custody transfer of petroleum products to precise batching in pharmaceutical production, the Roots rotary displacement flow meter delivers consistent performance, making it a trusted instrument across numerous critical industrial sectors.
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