Why Do 90% of Industrial Plants Choose the LZS Flanged Flow Meter?

In industrial piping systems, accurate flow measurement plays a critical role in ensuring operational efficiency and cost optimization. The LZS flanged plastic rotameter is a simple yet highly effective solution, widely used due to its robust construction, easy installation, and stable performance in various applications such as water, wastewater, and mildly corrosive fluids.

1. Product Overview

The LZS flanged plastic rotameter is a mechanical flow measurement device operating based on the variable area principle. It is manufactured from high-quality engineering plastics, making it suitable for applications involving clean water, wastewater, and mildly corrosive liquids.

With its flanged connection design, the LZS flow meter ensures secure installation and high sealing performance, especially in large-diameter piping systems.

2. Construction of LZS Flow Meter

The LZS rotameter features a simple yet effective structure consisting of the following main components:

• Tapered tube (measuring body): provides a variable cross-sectional area
• Float: moves vertically according to the flow rate
• Guide rod: stabilizes float movement
• Scale: directly indicates flow rate
• O-ring seals: ensure leak-proof operation
• Flanged connections: enable secure installation

This design allows for stable operation, easy observation, and no need for external power.

3. Operating Principle

The LZS flow meter operates on the variable area principle:

As the fluid flows upward through the tapered tube, it exerts a force that lifts the float. The float position changes depending on the flow rate:

• Low flow rate → float remains at a lower position
• High flow rate → float rises higher

The flow rate is read directly from the calibrated scale corresponding to the float position.

4. Technical Specifications

• Nominal size (DN): DN15 – DN200
• Accuracy: ±4%
• Operating temperature: 0 – 60°C
• Working pressure:
  • ≤ 0.6 MPa (small sizes)
  • ≤ 0.4 MPa (large sizes)
• Connection type: Flanged
• Materials:
  • Body: Plastic (PVC/AS)
  • Float: ABS
  • Seals: Rubber

5. Flow Range and Sizes (DN15 – DN200)

The LZS series offers a wide range of models to meet various application requirements:

• DN15 – DN25: 5 – 3000 L/h
• DN32 – DN50: 0.4 – 16 m³/h
• DN65 – DN100: 4 – 60 m³/h
• DN125 – DN200: up to 300 m³/h

This wide range makes it suitable for both small-scale and large industrial systems.

6. Key Advantages

✔ Simple and robust design
✔ No external power required
✔ Cost-effective solution
✔ Excellent corrosion resistance (for mild chemicals)
✔ Easy installation and maintenance
✔ Clear and direct visual indication
✔ Flanged connection ensures tight sealing and stability

7. Applications

The LZS flow meter is widely used in:

• Water and wastewater treatment systems
• Chemical processing (mild chemicals)
• Food and beverage industry (non-aggressive fluids)
• Irrigation systems
• Industrial production lines

8. Installation and Operation Guidelines

For optimal performance, follow these guidelines:

• Install the meter in a vertical position
• Ensure flow direction is from bottom to top
• Avoid strong vibrations
• Ensure clean fluid (free of large particles)
• Tighten flange connections properly to prevent leakage

9. Selection Guidelines

When selecting an LZS flow meter, consider:

• Pipe size (DN)
• Required flow range
• Type of fluid (water, chemical, etc.)
• Operating pressure and temperature

Proper selection ensures accuracy and long service life.

The price of LZS flow meters depends on:

• Nominal size (DN)
• Material configuration
• Flow range

👉 For an accurate quotation, please contact the supplier with your system specifications for proper model selection.