Eccentric Orifice Plate

• ARO-EP-002

What is a Eccentric Orifice Plate?

The Arrotop Eccentric Orifice Plate is an advanced flow measurement device designed for applications involving fluids with suspended particles, slurries, or high-viscosity materials. Featuring an off-center hole, this plate minimizes clogging by allowing particulate matter to pass through more freely, ensuring accurate flow measurement even under challenging conditions.

Product Data

Overview

Arrotop is a leading manufacturer and supplier of Eccentric Orifice Plates in India. Designed with an offset bore, these plates allow smooth flow of fluids containing solids, vapors, or viscous media—minimizing the risk of clogging and reducing pressure loss. This makes them especially suitable for demanding applications in chemical processing, oil and gas, and wastewater treatment.

Manufactured from premium materials, these orifice plates offer exceptional durability, precise flow measurement, and adaptability to a wide range of fluid conditions. With a strong commitment to quality and customization, Arrotop has built a solid reputation as a reliable source for Custome Eccentric Orifice Plate solutions in India and across global markets.

Arrotop’s eccentric orifice plates are designed and manufactured in accordance with ISO 5167 and ASME flow measurement standards, ensuring accuracy and repeatability.

Features

  • High Accuracy : Ensures precise flow measurement with well-defined pressure drop.
  • Versatility : Suitable for a wide range of fluids, including gases, liquids, and steam.
  • Durability : Constructed from high-quality materials to withstand harsh industrial environments.
  • Ease of Installation : Can be installed in various orientations.
  • Low Maintenance : Simple design with minimal moving parts reduces maintenance needs.
  • Cost-Effective : Provides accurate measurement at a lower cost compared to other devices.
  • Wide Range of Sizes : Available in sizes from 0.5″ to 24″.
  • Customizable : Various materials and coatings are available to handle specific conditions.
  • Robust Construction : Designed to endure high pressure and temperature variations.
  • Reliable Performance : Consistent and repeatable measurements.

Product Overview

  • Design: Circular eccentric orifice where the center is not aligned with the pipe axis; the most eccentric side of the orifice is flush with the inside wall of the pipe, allowing particulates or condensation to pass freely.
  • Function: Measures flow rate by creating a differential pressure drop while facilitating the passage of particulates.
  • Installation: Suitable for horizontal, vertical, or inclined pipelines.
  • Maintenance: Low maintenance due to its robust and simple design.
  • Customization: Available with specialized coatings for enhanced resistance to corrosive environments and tailored to meet specific application requirements.
  • Reliability: Ensures consistent performance even with fluids containing high levels of suspended particles.

Technical Information

Model NumberARO-EP-002
MaterialSS 304/L, 316/L, Duplex, Super Duplex, Hastelloy,
Carbon Steel, Monel, Inconel, PP, PVC, PTFE-coated,
Stellite-coated (special alloys on request)
Sizes0.5″ to 24″ (up to 48″ on request)
Beta Ratio0.2 to 0.75
Thickness3.18 mm, 6.35 mm, 9.52 mm, 12.7 mm (other on request)
Effective RangeTypically suitable for Reynolds number between 2×10^5ß and 10^6ß
StandardsISO 5167, ASME B16.36, BS 1042, API 2530, AGA Report 3
Pipe SizesFrom 100mm to 1,000mm
Fluid TypesLiquid, Gas, Stream
AccuracyWithin 1% of the maximum flow rate
Repeatability± 0.1% of the indicated flow rate
Tapping MethodsFlange Taps
Limit of useOrifice Diameter(d) : 50mm, Pipe Diameter(d) : < D <1,000mm, Beta Ratio(ß) : 0.45 to 0.85

Dimensional Data

Sizes Chart

DN (Nominal Diameter) Orifice Diameter (mm) Plate Thickness (mm)
DN15 (0.5″) 15 3.18
Dn25 (1″) 25 3.18
DN50 (2″) 50 6.35
DN100 (4″) 100 6.35
DN150 (6″) 150 9.52
Dn200 (8″) 200 9.52
DN300 (12″) 300 12.7
DN400 (16″) 400 12.7
DN600 (24″) 600 12.7

Applications of Arrotop Eccentric Orifice Plate

The Arrotop Eccentric Orifice Plate is widely used in various industries for its exceptional flow measurement capabilities:

  • Chemical Processing: Measures flows containing particulates, enhancing processing efficiency and safety.
  • Oil and Gas: Monitors fluid flow in pipelines, optimizing production, and ensuring safe operations.
  • Power Generation: Used for steam and water flow measurement in power plants, aiding in efficient energy production.
  • Water Treatment: Provides precise flow measurement for regulatory compliance and process control in water and wastewater treatment.
  • Food and Beverage: Ensures accurate flow control in production lines for quality and consistency.
  • Pharmaceutical: Delivers precise flow measurement in sensitive processes for quality and compliance.
  • HVAC Systems: Utilized in heating, ventilation, and air conditioning for efficient energy use and climate control.
  • Mining: Measures slurry and fluid flows, ensuring operational efficiency in mining operations.
  • Pulp and Paper: Provides accurate measurement of liquid and gas flows in production processes for quality control.
  • Marine and Shipbuilding: Measures various fluids in ship systems, ensuring operational efficiency.
  • Automotive: Delivers precise fluid measurement in manufacturing processes.

Advantages of Arrotop’s Eccentric Orifice Plate

  • High Accuracy: Provides precise flow measurements even with fluids containing particulate matter.
  • Versatility: Suitable for various fluids including slurries, viscous materials, and those with debris.
  • Durability: Constructed from high-quality materials designed to withstand harsh industrial environments.
  • Ease of Installation: Flexible installation options across different pipeline orientations.
  • Low Maintenance: Simple design with minimal moving parts reduces the need for frequent maintenance.
  • Cost-Effective: Offers reliable measurement at a lower cost compared to other specialized flow meters.
  • Wide Range of Sizes: Available in a comprehensive range of sizes to meet diverse application requirements.
  • Customizable: Tailored options with various materials and coatings to suit specific process needs.
  • Robust Construction: Engineered to handle high pressure and temperature variations.
  • Reliable Performance: Ensures consistent and repeatable measurements over extended periods.

FAQs for Eccentric Orifice Plate

Q. What is an eccentric orifice plate used for?

An eccentric orifice plate is used for differential pressure flow measurement of fluids containing suspended solids, slurries, or condensate. Its offset bore helps prevent clogging and ensures reliable measurement.

Q. When should an eccentric orifice plate be selected instead of a concentric type?

Eccentric orifice plates are preferred when the process fluid contains solid particles, high viscosity, or entrained gases, where a concentric orifice plate may clog or give unstable readings.

Q. Which standards are followed for eccentric orifice plate design?

Eccentric orifice plates are designed and manufactured in accordance with ISO 5167, ASME MFC-3M, AGA-3, BS 1042, and ISA RP 3.2, depending on application and customer requirements.

Q. What materials are used for eccentric orifice plates?

Common materials include SS 304, SS 316, SS 316L, carbon steel, and special materials such as duplex stainless steel and alloy steel for corrosive or high-temperature services.

Q. Are eccentric orifice plates suitable for slurry and viscous fluids?

Yes, eccentric orifice plates are especially suitable for slurry, viscous fluids, and fluids with suspended particles, as the offset bore allows solids to pass through without blockage.