Circular Orifice Plate Flowmeter Ideal For Sediment Or Bubbles And Simple Structure

The circular-arc orifice plate flowmeter is a throttling type flow measurement instrument based on the differential pressure principle. It measures flow by setting a throttling element with a circular-arc-shaped opening in the pipeline and calculating the flow based on the pressure difference generated when the fluid passes through the annular channel.

The design goal of the segmental orifice plate is similar to that of the annular orifice plate, both aiming to prevent clogging. However, their implementation methods and optimal application scenarios are slightly different.

1. Excellent Anti-Clogging Performance, Especially Suitable for Bottom Sediment Media
   • Core Advantage: As the openings are located at the bottom (or top, depending on the installation direction) of the pipe, solid particles, sediment, and slurry in the fluid can pass through the throttling element without hindrance, making clogging extremely unlikely.
   • Difference from Annular Orifice Plate: The flow path of the annular orifice plate surrounds the center, while that of the segmental orifice plate is close to the bottom of the pipe. This gives the segmental orifice plate a natural advantage when measuring liquids containing heavy, easily settling solid particles (such as slurry, mud).
2. Ideal for Media with Sediment or Bubbles

   It is the ideal choice for measuring the following media:

   • Liquids containing a large amount of sedimentable solid particles (such as cement slurry, slurry, sewage sludge).
   • Dirty liquids where impurities need to pass through smoothly.
   • When measuring liquids with a small amount of bubbles, the segmental orifice can be installed upwards, allowing the bubbles to pass smoothly through the top opening.
3. Simple Structure and Relatively Low Cost

   Its structure is simpler than that of the annular orifice plate and is close to that of a standard orifice plate, so its manufacturing cost is usually lower than that of the annular orifice plate.

• Material Selection: Choose stainless steel, Hastelloy, or PTFE-lined material based on the corrosiveness of the medium.
• Connection Method: Flange connection (conventional) or welding connection (high temperature and high pressure).
• Pressure Taking Method: Ring chamber pressure taking (clean medium) or remote diaphragm box (dirty medium).

• The orifice plate flowmeter with a circular or elliptical opening is an expert in handling slurries containing easily settling solid particles.
• Mining and metallurgy industries: measurement of pulp, tailings, and coal-water mixtures.
• Cement industry: measurement of cement slurry.
• Water treatment and environmental protection: measurement of raw sewage, sludge, and wastewater with a large amount of sediment.
• Chemical industry: measurement of slurries containing crystals or polymers.

The circular orifice plate flowmeter is a specialist in the differential pressure flowmeter family, excelling in the measurement of slurries. It performs exceptionally well in handling dirty liquids with sediment, but its successful application is highly dependent on correct selection and extremely precise installation orientation. When choosing, it is essential to distinguish it from the annular orifice plate based on the physical characteristics of the medium (whether it is settling solids or suspended impurities).