Rosemount™ 405 Compact Orifice Primary Element

The Rosemount 405 Compact Orifice Primary Element delivers accurate flow measurements. Built with either a compact orifice plate or a patented 4-hole conditioning plate, this flow meter provides measurements for closed loop control, general purpose monitoring and custody transfer applications. Available in line sizes up to 12 in. (300 mm), this primary element is designed for gas, liquid and steam service and operates well in harsh process conditions.

• Easy-to-install direct mount primary element assembly provides straightforward installation between flanges
• General purpose design delivers reliable and accurate flow measurement for gas, liquid and steam service
• Available in 0.5 - 12 in. (15 - 300 mm) line sizes for application flexibility
• Optional self-centering mechanism simplifies installation
• Based on a ASME/ISO corner tap design to meet industry standards
• Patented 4-hole design enables accurate flow measurement in disturbed flow profiles
• Innovative orifice plate requires only 2D upstream and 2D downstream to reduce pipe straight-run
• Does not require impulse lines, special flanges or piping modifications for cost-saving efficiency
• Offers direct-mount capability for ease of installation

The Rosemount 405 Compact Orifice Primary Element adopts an innovative compact structure, which is more than 30% smaller in volume compared with traditional orifice elements. It greatly saves installation space, especially suitable for industrial scenarios with dense pipeline layouts. There is no need to expand the equipment installation area additionally, reducing the difficulty of engineering planning.

Relying on Rosemount's advanced flow measurement technology, this orifice primary element has undergone precise calibration, with a measurement accuracy of up to ±0.5%. It can stably capture the flow changes of various media such as liquids, gases, and vapors. Even under complex working conditions (such as medium pressure fluctuations and temperature changes), it still maintains excellent measurement stability, providing reliable data support for flow monitoring in the production process.

The element shell is made of high-quality corrosion-resistant alloy material, which can resist the erosion of various corrosive media. At the same time, it has good anti-vibration and anti-impact performance, adapting to the harsh working environments of chemical, petroleum, electric power and other industries. Its service life is 50% longer than that of ordinary orifice elements, reducing the frequency of equipment replacement and maintenance costs.

The optimized structural design makes the installation process of the Rosemount 405 Compact Orifice Primary Element simpler. It can be assembled without complex tools, and it is easy to disassemble during later maintenance, reducing downtime. In addition, the element is equipped with clear labels and installation guides, reducing the difficulty for operators to get started and improving operation and maintenance efficiency.

1. Adaptable to Diverse Industrial Scenarios: Whether it is raw material flow monitoring in chemical production, steam flow control in petroleum refining, or coolant flow management in the electric power industry, the Rosemount 405 Compact Orifice Primary Element can be accurately adapted to meet the personalized flow measurement needs of different industries. There is no need to purchase special elements separately for different scenarios, reducing procurement and inventory costs.

2. Reliable Brand Guarantee: As a world-renowned brand in process control instruments, Rosemount has decades of experience in flow measurement technology accumulation. Its products have been verified in markets around the world, and their quality and performance are widely recognized. By choosing the Rosemount 405 Compact Orifice Primary Element, you can enjoy professional technical support and after-sales service provided by the brand, avoiding production risks caused by product quality problems.

3. A Preferred Choice for Cost Reduction and Efficiency Improvement: From the perspective of long-term use costs, this element reduces raw material waste or production errors caused by flow data deviations through high-precision measurement. At the same time, its characteristics of high durability and convenient maintenance reduce equipment maintenance and replacement costs. Statistics show that enterprises using the Rosemount 405 Compact Orifice Primary Element can reduce the comprehensive cost of flow measurement equipment by more than 20% annually.

4. Compliance with International Standards: The product is designed and produced in strict accordance with international industrial standards such as ISO and ANSI, and is compatible with mainstream global flow control systems. There is no need to worry about adaptation issues with existing equipment, facilitating enterprises to carry out equipment upgrades or cross-border project cooperation, and eliminating obstacles caused by differences in technical standards.

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