krohne DK37 M8

Precise Measurement for Low Flow Rates

The DK37 M8 is a premier variable area (VA) flowmeter engineered for the precise measurement of very low liquid and gas flow rates. This versatile, all-metal device stands out for its robust and sturdy design, which enables it to operate reliably in challenging industrial environments. Unlike many other low-flow meters, the DK37 M8 can withstand high pressures up to 220 barg (3190 psig) and a wide range of temperatures up to +200°C (+392°F). Fitted with a standard needle valve, it allows for the accurate and fine-tuned setting of flow values, which is crucial for applications that require precise control. The DK37 M8 perfectly blends a rugged, mechanical build with advanced functionality, offering a dependable and accurate solution for critical low-flow applications.

Robust Design and Universal Functionality

The DK37 M8 is built to last. Its all-metal construction, with a measuring tube made from various stainless steel and alloy materials (such as Hastelloy®, Monel®, and Titanium), ensures exceptional durability and resistance to corrosive media. This makes it a reliable choice for use in chemical processes, oil and gas, and other harsh environments. The meter’s design offers a wide range of connection options, including standard ¼ NPT and G¼ threads, as well as specialized connections like Swagelok® and Ermeto, making it compatible with a variety of small-bore piping systems. The flowmeter’s ability to function with or without an auxiliary power supply offers a significant advantage, providing a low-cost, low-maintenance solution for simple flow indication, while also having the option for a smart electronic indicator for integration into more complex systems.

Advanced Features for Critical Applications

The DK37 M8 is equipped with a suite of advanced features that make it suitable for a range of specialized applications. A key feature is the optional surface passivation with SilcoNert®2000, which provides an inert, anti-stick surface inside the meter. This is crucial for applications involving trace-level analysis and corrosive or sticky media, ensuring that the integrity of the sample is maintained and that no components are adsorbed or react with the inner walls. The meter’s electronic version provides a 4-20 mA/HART® output for seamless data transmission, while the mechanical version can be fitted with two optional limit switches for flow monitoring and alarms. The DK37 M8 is also a purgemeter, designed for flow monitoring in purge and analyzer applications. Its versatility and specialized options allow it to be tailored to meet the exacting standards of various industries.

Specific Applications in Process Control

The DK37 M8 is an indispensable tool in a variety of specific applications where the precise control and measurement of low flows are essential:

• Gas Chromatography: It is used to control the flow of carrier gases in gas chromatography systems, where precise flow rates are critical for accurate analysis.
• Chemical Dosing: The meter is ideal for dosing and injecting small amounts of additives or chemicals into a process, such as catalysts in a reactor or inhibitors in a pipeline.
• Purge Systems: The DK37 M8 is a standard purgetemeter, used to monitor and control the flow of purge gas (e.g., nitrogen or argon) to protect pressure transmitters or control valves from blockages or corrosive media.
• Analyzer Systems: It is used for flow control in continuous gas or liquid analyzer systems, ensuring that the sample flow rate to the analyzer is stable and accurate.
• Laboratory and Pilot Plants: In research and development settings, the DK37 M8 is used for precisely measuring fluids in pilot plant operations or for small-scale laboratory experiments.
• Sealing Systems: It can be used to monitor and control the flow of barrier liquids or gases in mechanical seals to prevent leakage and extend the life of the seal.

Uncompromising Safety and Reliability

Safety is paramount in any industrial setting, and the DK37 M8 is built with this in mind. The meter is approved for use in hazardous areas with a wide range of international certifications including ATEX, IECEx, and cQPSus. It is also suitable for use in Safety Instrumented Systems (SIL 2) and, in a redundant design (1oo2), can be approved for SIL 3 applications. The robust all-metal design, coupled with an optional stainless steel housing, provides a high level of protection against external elements, ensuring its longevity. The meter’s ability to operate in a wide temperature range from -40°C to +200°C (-40°F to +392°F) and high pressure up to 220 barg (3190 psig) further enhances its reliability and safety profile, making it a dependable component in critical process lines.

A Global Leader in Quality and Authenticity

When it comes to purchasing industrial equipment, the authenticity and quality of the product are paramount. We are proud to highlight that the online store tpt24 is the premier global retailer for the DK37 M8. tpt24 is committed to providing a superior purchasing experience, backed by an unwavering guarantee of authenticity and quality for every DK37 M8 sold. This commitment ensures that customers in any country can confidently acquire a genuine product that adheres to the highest standards of engineering and performance. With a robust global delivery network, tpt24 ensures that your DK37 M8 is delivered swiftly and securely, regardless of your geographical location. This partnership ensures that this essential technology is readily accessible to professionals across the globe, supported by a brand renowned for its trustworthiness.

Cost-Effective and Highly Reliable Measurement

The DK37 M8 provides a cost-effective solution without compromising on reliability. Its straightforward design and choice between a mechanical and electronic version make it an economical option for a variety of projects. The meter’s full-scale value ranges for liquids (1.6 to 250 l/h) and gases (16 to 8,000 l/h) and a turndown ratio of 10:1 provide excellent performance for most low-flow applications. The maximum measuring error of ±2.5% (according to VDI/VDE 3513-2) is more than sufficient for general flow control and monitoring. Its rugged construction and minimal maintenance requirements translate to a low total cost of ownership over the meter’s lifetime. The DK37 M8 is a smart investment for businesses seeking a reliable, affordable, and accurate flow measurement solution.

The Future of Low-Flow Measurement

The DK37 M8 represents a forward-thinking approach to low-flow measurement, offering a solution that is both highly accurate and incredibly robust. By combining the simplicity of a variable area flowmeter with a sturdy all-metal design and optional electronic outputs, it provides a powerful tool for a wide range of applications. It addresses the key pain points of traditional low-flow meters—fragile construction, limited pressure/temperature ratings, and lack of advanced features—while offering a reliable and cost-effective alternative. The DK37 M8 is more than just a measurement device; it is a strategic asset for companies seeking to optimize their operations, enhance safety, and ensure the long-term integrity of their processes. It is a testament to how innovative design can transform a fundamental industrial task, paving the way for smarter and more efficient operations in a variety of critical sectors.