Orifice plate, orifice flange, annular chamber

Differential pressure flowmeters are used in many technical applications. As primary flow elements, orifice plates are the most common solution. Orifice plates are notable for their easy installation and management.

The differential pressure generated by the primary flow element is normally transformed into an electrical signal proportional to flow by a differential pressure transmitter.

Our main flow primary elements are optimized to customer requirements and perfectly match the respective end applications. The bore design ideally matches the special features of the plant.

Our products are available with RF, FF or RTJ sealing faces. For special applications, designs to customer standards can also be supplied.

Description of the orifice plate:

Orifice plates are among the simplest primary flow elements. Their bore diameter is calculated to generate the specific differential pressure at full flow. Appropriate orifice plates are available for a wide range of different media.

Flanged Port Holder Description:

For mounting orifice plates or flow nozzles, instead of pipe flanges, specific orifice flanges are used. The orifice flange has pairs of pressure taps that are machined directly into the orifice flange. This has the advantage of distributing orifice holders or pressure taps in the wall of the pipe.

The orifice plate assembly is completed with lifting screws to ensure easy removal.

Description of the annular chamber:

Annular chambers are used to achieve stable measurements under harsh process conditions. They are mounted between process flanges already installed. The different pressure in the pipe is compensated by using a space between the inside of the pipe and the annular chamber.

Applications:

• Energy production
• Oil production and refining
• Water treatment and distribution
• Gas treatment and distribution
• Chemical and petrochemical industries

Features:

• Maximum operating temperature up to 800°C
• Maximum operating pressure up to 400 bar
• Suitable for liquid, gas and vapor flow measurement
• Accuracy ≤ ±0.5% of rate
• 0.1% measurement repeatability