DK-Lok Fittings invites you to explore our comprehensive Tube Fittings and Valve Catalog. It features in-depth specifications, product comparisons, and CAD drawings for our diverse range of tube fittings, instrument pipe & weld fittings, valves, and an assortment of valve and fitting items.”
DK-LOK® tube fittings, instrument pipe & weld fittings, and valves embody exceptional manufacturing standards. Incorporating the finest raw materials and adhering to a strict 1/1000″ tolerance on each component, DK-LOK® Fittings and Valves guarantee a leak-free seal in all process, power, and instrumentation applications.
The MVFI team is passionately dedicated to delivering superior customer service. By combining our top-quality valve and fitting products with unparalleled customer service and competitive pricing, DK-LOK® offers unmatched value to our esteemed customers. We at DK-LOK® Fittings and Valves are eager to provide solutions tailored to your specific needs.

Are you tired of dealing with leaky tube connections? Look no further than DK-LOK fittings. These high-quality fittings are designed to provide a reliable, leak-free connection for various applications.
Made from durable materials such as stainless steel, brass, and carbon steel, DK-LOK fittings are resistant to corrosion and built to last. They also come in a variety of types, including compression fittings.
But DK-LOK doesn’t just offer fittings – they also provide reliable flow control solutions with their valves. Their products are trusted by industries ranging from oil and gas to semiconductor manufacturing, thanks to their exceptional customer service. From ball valves to needle valves, DK-LOK ensures that their customers receive the best possible service.
So how do these fittings work? With compression fittings, the tube is inserted into the fitting body and tightened down onto a ferrule or ring that compresses onto the tube.
Another innovative product offered by DK-LOK is Lokring – a patented technology that provides a metal-to-metal seal without welding or brazing. This makes installation quick and easy while still providing a secure connection.
Whether you’re looking for reliable tube connections or flow control solutions, DK-LOK has got you covered with their high-quality fittings and valves.
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Advantages of DK-LOK Fittings and Valves: Leak-Tight Capabilities
DK-LOK fittings and valves are known for their leak-tight capabilities, making them a popular choice in various industries. In this article, we will discuss the advantages of using DK-LOK fittings and valves in terms of their leak-tight capabilities.
Easy Installation and Maintenance
One of the advantages of using DK-LOK fittings and valves is that they are designed for easy installation and maintenance. The two-ferrule design of DK-LOK fittings allows for a secure connection without requiring excessive torque or special tools. This design also enables quick disassembly, making it easier to replace components or perform routine maintenance.
The compact size of DK-LOK fittings makes them ideal for use in tight spaces where traditional threaded connections may not fit. This feature allows for more flexibility when designing piping systems, as well as easier access during maintenance.
High-Quality Materials
Another advantage of using DK-LOK fittings and valves is that they are made with high-quality materials. The use of materials such as stainless steel, brass, and carbon steel ensures durability and longevity even in harsh environments.
Moreover, all DK-LOK products undergo rigorous testing to ensure that they meet industry standards for quality and performance. This commitment to quality means that customers can trust DK-LOK products to provide reliable service over an extended period.
Leak-Tight Capabilities
The most significant advantage of using DK-LOK fittings and valves is their leak-tight capabilities. These products feature a double ferrule design that creates a strong mechanical grip on the tubing or pipe while also providing a metal-to-metal seal between the fitting body and the tubing/pipe surface.
This design results in a connection that is resistant to vibration, thermal cycling, pressure fluctuations, and other stresses commonly encountered in fluid handling applications. As a result, DK-LOK fittings and valves provide a leak-tight seal that ensures the safety and integrity of the system.
Furthermore, DK-LOK fittings and valves are available in a wide range of materials, sizes, and configurations to meet specific application requirements. Whether you need high-pressure or high-temperature capabilities, compatibility with aggressive chemicals or gases, or compliance with industry standards such as ASME B31.3 or NACE MR0175/ISO 15156-3, there is a DK-LOK product that can meet your needs.
Applications of DK-LOK Fittings and Valves in Various Industries
DK-LOK fittings and valves are widely used in various industries such as oil and gas, chemical, petrochemical, and semiconductor. These fittings are designed to withstand high pressure and temperature, making them ideal for critical applications. Engineers and technicians prefer DK-LOK fittings because of their reliability, durability, and ease of installation.
Oil and Gas Industry
The oil and gas industry is one of the largest users of DK-LOK fittings. These fittings are used in drilling rigs, offshore platforms, refineries, pipelines, and storage tanks. In the oilfield industry, safety is a top priority; therefore, reliable equipment is essential to prevent accidents that could lead to environmental disasters or loss of life. With its robust design and high-pressure rating capabilities up to 10k psi (689 bar), DK-LOK fittings ensure safe operations in harsh environments.
Chemical Industry
In the chemical industry, where hazardous chemicals are processed or transported through pipelines or vessels at high pressures or temperatures, safety is paramount. DK-LOK fittings provide a leak-tight seal that prevents any accidental release of toxic substances into the environment. They also resist corrosion from harsh chemicals like acids or bases that can cause damage to other types of materials.
Petrochemical Industry
The petrochemical industry uses DK-LOK fittings in plants that produce chemicals derived from petroleum products such as ethylene or propylene. These plants require reliable equipment with high-pressure ratings capable of handling corrosive materials under extreme conditions. The use of DK-LOK fittings ensures smooth operations without any leaks, even when exposed to aggressive media.
Semiconductor Industry
The semiconductor industry requires ultra-clean environments during manufacturing processes to prevent contamination that could affect product quality. The use of DK-LOK fittings ensures a leak-tight seal that prevents any ingress from outside contaminants while maintaining a clean environment. They also provide a secure connection that can withstand high vacuum pressures used in semiconductor manufacturing processes.
Understanding the Basics of DK-LOK Products: Instrumentation Pipe, Weld Fittings, and Valves

DK-LOK is a leading manufacturer of high-quality fittings for use in high-pressure and high-temperature applications. They offer a wide range of products, including instrumentation pipes, weld fittings, and valves that are designed to meet the needs of various industries. In this article, we will discuss the basics of DK-LOK products and their features.
DK-LOK Products: Instrumentation Pipes
Instrumentation pipes are used in various industries, such as oil refining, chemical processing, and power generation. These pipes are designed to withstand high pressures and temperatures while maintaining their integrity over time. DK-LOK’s instrumentation pipes come in different sizes and materials to suit various applications.
One of the key features of DK-LOK’s instrumentation pipes is their leak-tight performance. The company uses advanced technology to ensure that their pipes have zero leakage, even under extreme conditions. This feature makes them ideal for critical applications where safety is paramount.
Another feature of DK-LOK’s instrumentation pipes is their ease of installation. The company offers a range of connectors and adapters that make it easy to install these pipes without requiring any special tools or equipment. This reduces installation time and costs, making them an attractive option for many industries.
DK-LOK Products: Weld Fittings
Weld fittings are used in piping systems to connect two sections of pipe together. They provide a permanent connection that can withstand high pressures and temperatures without leaking or failing over time. DK-LOK offers a range of weld fittings that are made from high-quality materials such as stainless steel, carbon steel, brass, and alloy steel.
One key feature of DK-LOK’s weld fittings is their precision engineering. The company uses advanced manufacturing processes to ensure that each fitting meets strict quality standards before it leaves the factory. This ensures that they are reliable and durable, even under extreme conditions.
Another feature of DK-LOK’s weld fittings is their ease of use. They come in different sizes and configurations to suit various applications, and the company offers a range of accessories such as gaskets, nuts, and bolts that make it easy to install them quickly and efficiently.
DK-LOK Products: Valves
Valves are used in piping systems to control the flow of fluids or gases. They can be manual or automatic and come in different types, such as ball valves, gate valves, globe valves, and check valves. DK-LOK offers a range of high-quality valves that are designed for use in various industries, such as oil and gas, chemical processing, power generation, and semiconductor manufacturing.
One key feature of DK-LOK’s valves is their precision engineering. The company uses advanced technology to ensure that each valve meets strict quality standards before it leaves the factory. This ensures that they are reliable and durable even under extreme conditions.
Another feature of DK-LOK’s valves is their versatility. They come in different sizes and configurations to suit various applications, and the company offers a range of accessories such as handles, actuators, positioners, limit switches, and solenoids that make it easy to customize them according to specific requirements.
Benefits of Using DK-LOK Fittings and Valves for Your Industrial Needs
High Reliability and Durability
DK-LOK fittings and valves are known for their high reliability and durability, making them a popular choice for industrial applications. These fittings are designed to withstand extreme temperatures and pressures, which is crucial in industries such as oil and gas, chemical processing, and power generation. The materials used in the manufacturing process of these fittings are carefully selected to ensure they can withstand harsh environments without compromising performance.
Improved System Performance
Using DK-LOK fittings can help improve overall system performance by reducing the risk of leaks. Leaks not only lead to loss of product or fluid but also pose safety risks to workers. With DK-LOK fittings, you can be assured that your system will operate efficiently without any leaks. This not only improves safety but also reduces downtime due to maintenance issues.
Customizable Sizes and Configurations
One of the key benefits of using DK-LOK fittings is their wide range of sizes and configurations available. This allows for customization based on specific industrial needs. Whether it’s a small-scale operation or a large-scale production facility, DK-LOK fittings can be tailored accordingly.
Cost-effective Solution
DK-LOK fittings offer a cost-effective solution for industrial needs compared to other options available in the market. The initial investment may seem higher than other alternatives, but it pays off in the long run due to its durability and reliability. By reducing maintenance costs associated with frequent replacements or repairs, businesses can save money over time.
Enhanced Safety Features
DK-LOK fittings come with enhanced safety features that make them suitable for hazardous environments. For example, some models have double ferrule designs that provide extra protection against leaks caused by vibration or thermal cycling. These fittings have been tested rigorously to meet industry standards ensuring compliance with safety regulations.
DK-LOK Fittings Technical Specifications of Valves for Different Applications
DK-LOK fittings and valves are widely used in various industries, such as oil and gas, chemical processing, power generation, and semiconductor manufacturing. They are designed to provide leak-tight connections that can withstand high pressure, temperature, and corrosive environments. In this article, we will discuss the technical specifications of DK-LOK fittings and valves for different applications.
Materials
DK-LOK fittings and valves are available in a wide range of materials, including stainless steel, brass, carbon steel, alloy 400, alloy C-276, titanium, and others. Each material has its own unique properties that make it suitable for specific applications. For example, stainless steel is commonly used in corrosive environments, while brass is preferred for low-pressure applications.
Pressure Rating
The pressure rating of DK-LOK fittings and valves ranges from vacuum to 10,000 psi, depending on the size and material. It is important to select the correct pressure rating for your application to ensure safe operation. The pressure rating is determined by factors such as wall thickness, material strength, temperature range, and fitting design.
Industry Standards
DK-LOK fittings and valves are designed to meet industry standards such as ASME B31.1 (Power Piping), B31.3 (Process Piping), B16.34 (Valves – Flanged, Threaded or Welding End), MSS SP-99 (Instrument Valves), API 607/6FA (Fire Safe Testing), NACE MR0175/ISO 15156 (Sour Gas Service), among others. These standards ensure that the products meet certain quality requirements and are suitable for their intended use.
Why Choose DK-LOK Fittings and Valves for Your Tube and Pipe Connections
DK-LOK fittings and valves are the go-to industrial tube and pipe connection products. These products have several advantages that make them stand out from other options in the market.
DK-LOK fittings and valves offer leak-tight capabilities that ensure your pipes remain secure without any leakage. This feature is crucial in industries such as oil and gas, where even a small leak can cause significant damage to equipment or personnel.
DK-LOK fittings and valves find applications in various industries, including chemical processing, power generation, semiconductor manufacturing, and more. These products are versatile enough to meet the demands of different sectors.
Understanding the basics of DK-LOK products is essential before purchasing them. The product line includes instrumentation pipes, weld fittings, and valves that cater to specific needs. Understanding these differences helps you choose the right product for your application.
Using DK-LOK fittings and valves has several benefits for your industrial needs. They provide excellent performance under high pressure or temperature conditions while maintaining their structural integrity over time.
Lastly, technical specifications of DK-LOK fittings and valves vary according to different applications. It is essential to understand these specifications when choosing a product that meets your requirements.
In conclusion, choosing DK-LOK fittings and valves for your tube and pipe connections provides numerous benefits due to their leak-tight capabilities across various industries. Invest in DK-LOK fittings today for high-quality results!
Convinced that DK-LOK fittings and valves best fit your tube and pipe connections? Don’t wait another minute. Michigan Valve & Fitting is ready to help you with your needs! We’re committed to providing you with the right product that aligns with your specific requirements.
We can provide additional information, answer any questions, and guide you through the selection process to ensure the perfect fit for your applications. Our team of experts is well-versed in the features and specifications of each DK-LOK product.
Don’t compromise on quality or efficiency. Contact Michigan Valve & Fitting today to explore the full range of high-performance DK-LOK fittings and valves. We look forward to helping you enhance your pipe and tube connections.
Call us now at (586) 598-9000, or drop us an email at sales@mvfi.com for prompt and professional service. Get ready to experience the benefits of DK-LOK fittings and valves for your business.