LEDAER LJ Series
Differential Pressure Flow Meter (Primary Elements): The Proven Standard for Extreme Process Conditions
📌 Overview
The Ledaer LJ Series throttling devices represent the most established and reliable method for measuring fluid flow in closed pipes. By creating a temporary pressure drop across a primary element (Orifice Plate, Nozzle, or Venturi), the system provides highly stable flow data. This series is engineered for extreme durability, capable of handling pressures up to 40 MPa and temperatures up to 550°C where electronic meters reach their limits.
✨ Core Advantages
Extreme Resilience
Engineered to withstand pressures up to 40 MPa and temperatures as high as 550°C.
Maintenance-Free
All-metal, rigid construction with no moving parts ensures an exceptionally long service life.
Smart Integration
Paired with world-class monocrystalline silicon intelligent sensors for digital precision.
Full Compensation
Features real-time T/P compensation for accurate mass flow readings of steam and gases.
📋 Technical Specifications
| Specification | Details |
|---|---|
| Pipe Diameter | DN15 – DN1200 |
| Nominal Pressure | ≤ 40 MPa |
| Process Temperature | -50°C to 550°C |
| Accuracy Class | 0.5 Class / 1.0 Class |
| Primary Elements | Orifice Plate (K), Nozzle (P), Venturi |
| Stability | Better than 0.1% FS per year |
| Protection / Ex | IP65-68; Exia II CT4-CT6 / Exd II BT4-BT6 |
🏗️ Diverse Throttling Options
The most cost-effective and widely used element for general liquid and gas flow.
Ideal for high-velocity flows and steam, offering lower pressure loss than orifice plates.
Includes Eccentric, Conical, and Segmental Orifices for fluids containing particles or slurries.
🏭 Typical Applications
High-pressure boiler feed water and superheated steam measurement.
High-pressure natural gas and crude oil flow monitoring.
Measuring aggressive chemicals in high-temperature reactors.
Precise calculation of heating/cooling energy in large networks.
The Ultimate Flow Authority
Differential pressure remains the most trusted method for utility and process billing globally.
Weld-tested and pressure-certified to ensure safety in 40 MPa high-risk environments.
Available in specialized alloys to resist high-temperature steam and abrasive chemicals.
Maximum Safety and Stability for Global Power and Oil Infrastructure.
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