Dive into Subsea Solutions with SIT

We’re excited to announce our presence at Subsea Tieback next week in San Antonio, TX at the Henry B. Gonzalez Convention Center February 27th – 29th, 2024 where we’ll be showcasing our subsea capabilities. If you’re attending, make sure to stop by booth #418!

From powering ROV thrusters and tool testing with hydraulic power units, to implementing remote valve actuation solutions for manifold operations, we’ve got you covered. Our launch and recovery systems make equipment deployment a breeze, while our shock and load deceleration technology ensures safety and efficiency.

At SIT, we pride ourselves on being your go-to for all things subsea. Whether you’re in need of mooring solutions or seeking innovative project solutions, we’ve got the expertise to make it happen. Check out some of our subsea project highlights below:

So, if you’re attending Subsea Tieback, be sure to swing by our booth #418 to learn more about how SIT can elevate your subsea projects.

A-Frames: Functions & Applications

An A-frame is a distinctive framework that resembles the shape of the letter “A.” You’ll typically find it mounted on the deck of various types of vessels, from research vessels and offshore platforms to fishing boats and even some military ships. The structure is primarily made of robust steel beams, meticulously designed to withstand the harsh conditions of the open sea.

So, what exactly does an A-frame do?

  1. Lifting and Deployment: One of the primary purposes of an A-frame is to facilitate the lifting and deployment of heavy equipment and objects into the water. This could range from submersibles and remotely operated vehicles (ROVs) used in underwater exploration to large fishing nets and scientific instruments. The A-frame’s design provides a sturdy platform for controlled lowering and raising of these items, ensuring a smooth operation even in rough seas.
  2. Research and Exploration: Research vessels often use A-frames to launch and recover equipment for scientific investigations. Whether it’s collecting samples from the ocean floor or deploying sensors to measure environmental parameters, the A-frame’s robust structure ensures that delicate and valuable instruments can be handled with care.
  3. Subsea Construction: In the offshore industry, A-frames are utilized for subsea construction and maintenance. They enable the precise positioning of heavy structures, such as underwater pipelines, installation of oil rigs, and the assembly of various components required for offshore operations.
  4. Rescue and Recovery: A-frames are crucial in search and rescue operations, allowing swift deployment of lifeboats and rescue vessels. Their efficient design enables quick response times during emergencies, potentially saving lives in critical situations.
  5. Diving Operations: When divers are involved in maritime activities, A-frames can provide a secure platform for divers to enter and exit the water. These structures help in managing diving operations, ensuring the safety and comfort of divers during their missions.

Engineering Ingenuity and Design:

The engineering behind A-frames is a blend of strength, stability, and adaptability. These structures can be designed to withstand dynamic loads, intense vibrations, and the corrosive effects of saltwater. Their versatile design allows for customization based on the specific needs of the vessel and the tasks to be undertaken.

The next time you spot an A-frame on a vessel you’ll have a newfound appreciation for its significance. These seemingly simple structures are a testament to human ingenuity, contributing to safer, more productive, and possibly adventurous journeys across the vast oceans. Contact SIT to learn more about our A-frame capabilities.

Myth vs. Reality – Use of ROVs in Subsea Drilling Operations

Myth vs. Reality – Use of ROVs in Subsea Drilling Operations

Supreme Integrated Technology, Inc. is proud to partner with many clients to deliver equipment necessary for subsea drilling operations. One of the interesting technologies we are able to assist with is underwater remotely operated vehicles (ROVs) which have replaced the need for human divers in many operations.

Myth: ROVs are not reliable for subsea drilling operations.

Reality: ROVs have proven to be extremely reliable for subsea drilling operations. They are equipped with advanced capabilities such as high-definition cameras and sophisticated manipulator arms, which allow them to carry out a wide range of tasks with precision and accuracy. In addition, ROVs can be remotely operated from the surface, which eliminates the risk of human divers needing to work in dangerous and harsh underwater environments.

Myth: ROVs are too expensive.

Reality: ROVs offer a number of benefits that can offset the cost. For example, they allow companies to drill in deeper waters, where traditional drilling methods are not possible. Additionally, the use of ROVs can improve the efficiency of drilling operations, as they can be operated around the clock and are not subject to the limitations and risks associated with using human divers.

Myth: ROVs are not as effective as human divers.

Reality: In many cases, ROVs are more effective than human divers for subsea drilling operations. ROVs are equipped with the following technologies:

High-Definition Cameras: show live video feeds to the operator on the surface. This allows the operator to see what the ROV is seeing in real-time and to make decisions based on that information.

Manipulator Arms: allow them to manipulate objects and carry out a wide range of tasks, such as retrieving samples, cutting cables, and installing subsea equipment.

Thrusters: deliver precise and efficient propulsion and maneuverability. The thrusters are designed to allow the ROV to move quickly and smoothly in any direction, which is essential for many subsea tasks.

Navigation Systems: provide precise position and orientation information. This is critical for tasks such as subsea survey and inspection, where accuracy is essential.

Communication Systems: allow the operator to control the ROV and receive real-time data and video feeds from the subsea environment.

Power Systems: power ROV’s various systems and components. This allows the ROV to operate for extended periods of time without needing to be recharged.

ROVs are critical for avoiding the limitations and risks associated with human divers, such as decompression sickness and other health risks associated with working in harsh underwater environments.

SIT has worked on various systems for ROVs including valve controls, deck controls and hydraulic power units. We specialize in tough applications and have the ability to design lightweight systems that can withstand harsh environments of saltwater and deepwater operations. SIT will be exhibiting at the Subsea Tieback Conference in Galveston, Texas, February 28th-March 2nd. Please visit us at Booth #806 to learn more about our capabilities.

Safe, Reliable Operation in Corrosive Environments: The TopWorx™ DX Stainless Steel Indicator

The TopWorx™ DXS is a 316 stainless steel valve controller that combines bus networking, pilot valve, and position sensors into a single globally certified, explosion proof enclosure that attaches to any automated valve package.


D-Series discrete valve controllers can survive in virtually any plant condition. Its corrosion resistance and heavy-duty construction enables superior performance in the most demanding applications. These controllers carry IECEx, ATEX, and UL certifications in a single model, making it easier for global customers to standardize operations across their facilities. D-Series controllers also carries NEPSI, KOSHA, InMetro, PESO, and EAC and EAC certifications.


Engineered with Emerson’s GO Switch sensing technology, their D-Series line delivers best-in-class capabilities. TopWorx GO Switches are hermetically sealed to outperform all other position sensors in hot, cold, wet, dirty, abusive, corrosive, and explosive conditions. Its unique cam design allows quick and accurate setting of the GO Switch positions reducing deadband and hysteresis to a minimum.

DXS specs include:

  • 316 Stainless Steel
  • Flameproof/Explosion Proof/Intrinsically Safe
  • Class I, Div 1 & 2
  • Class II, Div 1 & 2
  • Ex ia IIC T6/T4
  • Ex d IIB+H2 or IIC T6/T5/T4/T3 Tamb -60°C to +175°C
  • Ex tb IIIC T135°C Tamb -50°C to + 92°C
  • II2GD, IP66/67, Type 4X

Contact us to learn more about Emerson’s TopWorx DXS and see if it’s a fit for your application.

*Content provided by Emerson.com/TopWorx

Showcasing our Wind Energy Capabilities at IPF this Week!

SIT is excited to exhibit in the International Partnering Forum (IPF) in Atlantic City, NJ on April 27th – 29th at booth #312 for the first time! IPF is the premier offshore wind energy conference in North America. Hosted by the Business Network for Offshore Wind, IPF connects global leaders and businesses in the supply chain, offers unparalleled networking opportunities, and delivers breaking updates on the industry, from technology to policy.

SIT’s experience within the marine industry, including ballast control, hull automation, steering systems, jacking systems and more, makes us a great partner for offshore floating wind turbines and vessels that support the installation and maintenance of both floating and fixed turbines. SIT specializes in custom systems for challenging applications to add to the rich history of marine component and system supply. As a single-source system integrator, SIT is engaged in all aspects of the project including design and development, manufacturing, and onsite commissioning while adhering to many regulatory standards such as ABS, DNV-GL, or Lloyd’s Register.

Floating Wind Turbines

  • Active ballast systems
  • Integrated Ballast Control System

Fixed Wind Turbines (WTIV or Feeder Vessels)

  • Jacking Systems
  • Hull Automation (Ballast) Systems
  • Steering Systems

Vessels Supporting Installation and Maintenance

  • Steering Systems
  • Winches
  • A-frames
  • Ramps
  • Davits
  • Launch and Recovery Systems

Contact us to learn more about our Wind Energy capabilities and how we can help with your next project.

Visit us at Sea Air Space!

We are excited to exhibit at the largest maritime expo in the U.S. in National Harbor, MD on April 4th – 6thSea-Air-Space! Sea-Air-Space brings the U.S. defense industry and key military decision-makers together for three days of informative educational sessions and important policy discussions. Owned and produced by the Navy League of the United States, Sea-Air-Space attracts maritime leaders from sea services around the globe.

SIT stands behind those who dedicate their lives to protecting others. Our team understands the rigorous requirements of meeting military specifications, building systems to meet rigorous test requirements and providing detailed project documentation.

SIT has a long history working on military projects to deliver new solutions. Some of our defense project highlights include:

– Launch & Recovery Systems
– Bow & Stern Ramps 
– Shell Closures 
– Ballast Control Systems
– Valve Automation
– Hydraulic Power Units
– Moon Pool Doors

Do you need help with your next project? SIT partners with customers in military, aerospace and marine industries to help design, build and test systems used in the most difficult operating conditions. Contact us today to get started, or stop by booth #1747 at the show to meet with us in person.

The Show Must Go On

This time last year, we were ramping up for the International Workboat Show in New Orleans. The annual tradeshow attracts members of the marine industry, who come together from around the world to network, learn, spot new industry trends, and uncover innovative products and solutions.

This year with the impact of COVID-19, exhibitors and attendees alike will miss out on this annual maritime industry tradition. While the cancelation of the Workboat Show is with everyone’s safety and best interest at heart, we will certainly miss attending this year!

Since we won’t be able to network with you in person, we’d like to fill you in on how we’ve been keeping busy. Here are some types of projects we have worked on:  

  • Marine & Offshore Projects – Headquartered in the center of Gulf Coast activity, SIT has a long history and deep-rooted relationship with the shipbuilding industry.
  • Subsea Projects – Our Subsea experts are knowledgeable in hydraulic power units for ROV thruster and tool testing. We specialize in custom, fully integrated packages which we put together and manufacture.
  • Jacking System Projects – Our unique jacking system is designed to allow the latest electric hydraulic and automation technology to help accurately control leg position.
  • Civil Projects – With an extensive history of success as Huber, SIT is considered a primary provider of moveable bridges to the state of Louisiana.
  • Defense Projects – We stand behind those who dedicate their lives to protecting others and we understand the rigorous requirements to supply to military operations.
  • Industrial Projects – Our focus on custom systems to meet customer requirements has led SIT into several industrial applications.

The show must go on – and it will! In December of 2021.

We are hopeful that the International Workboat Show will take place as planned from December 1-3, 2021. When and if it does, be sure to stop by our booth to learn more about SIT’s capabilities in designing and building liftboat jacking systems, valve actuation, marine tank management, steering packages and hydraulic power units.

For the time being, we are readily available to assist with your projects, whether it be in person while practicing safe social distancing, or remotely. From everyone at SIT, stay safe and we hope to see you soon!

Valve MAST (Maximum Allowable Stem Torque): Its Relevance and Use in Valve Automation

One of the most important criteria when performing calculations for sizing of automated and manually-operated valves is considering the valve’s MAST value. The MAST value is the Maximum Allowable Stem Torque, defined as the greatest torque to which a valve stem can be subjected to during operation without mechanical failure.

Historically, its relevance was somewhat reduced in the valve and actuation industry, especially when it came to actuator sizing. Even today, you may be hard-pressed to find it included in sizing procedures in any manufacturer’s standard catalogue since this information is usually considered proprietary to design. However, as assets age and failure history is established, this value’s importance and demand for accuracy have adopted a more influential role in actuator sizing today.

Failure to identify, select, and size inclusive of the MAST value usually results in a partial or full shearing of the valve stem causing anything from valve leakage to complete loss of control. In some cases, it is not necessarily shearing that occurs but rather deflection during operation. The cause of this deflection originates from the selected stem material being too soft to withstand the applied forces to the disc, ball, or plug. Unfortunately, this discrepancy yields a chronological accelerated wear of the sealing surfaces which ultimately gives way to premature leakage and accelerated valve failure. The valve, and its level of importance in the application, determine the severity of the failure’s outcome. It is important to understand that there is currently no regulation by API (American Petroleum Institute) that requires manufacturers to publish their MAST values or “raw” torque values, despite mutual agreement throughout the industry by valve experts and engineers that such information is essential to actuator sizing and lifetime valve performance.

“Raw” torque values refer to the valve torques that have not been inflated by a manufacturer’s internal safety factor (which is usually added to account for manufacturing tolerances). In most cases this all boils down to the repeatability of each manufacturer’s manufacturing process and various checkpoints for quality control. Most manufacturers have very predictable manufacturing tolerances; however, they elect to omit the safety factor from published torque data. This exclusion is the primary reason why MAST values are exceeded. Excessive torque at the stem when sizing actuators will create a need to consider changing stem material. Specifying a higher yield stem material will prevent deflection or in the worst-case complete valve failure due to sheering. There are many different factors that can affect stem material selection and design in valves. Whether butterfly valves, ball valves, or plug valves, the customer or EPC provides the application conditions and, in turn, the valve manufacturer or automation supplier recommends a product that meets the provided conditions. Factors that may affect stem material selection are pressure class, process media, environmental factors, and client classification requirements.

Since valve manufacturers and distributors usually stock only the most popular valves to reduce inventory costs and maintain a high level of turnover, valves with uncommon body, disc, and stem materials are typically only produced on a machine-to-order basis. Therefore, delivery of these products can range anywhere from 26-48 weeks with cost variances of four to five times the average. If the manufacturer does not state the provided values are raw, it is imperative for one to seek clarification for this added multiplier. In short, ask questions! Ensuring that this base torque value for the valve excludes a safety factor is of the utmost importance for the following reasons: 1) preventing a multiplication of safety factors and oversizing of the actuator and 2) forcing an unnecessary upgrade to the stem and disc material.

Some of the most common stem materials are listed below in increasing order in terms of MAST as well as cost impact:

  • 316/316L SS
  • 17-4 PH SS
  • Monel K-500
  • Inconel 718

It is crucial to consider safety factors from both the client-driven requirements and the built-in margin from the manufacturer. In doing so there will be instances where combinations of the above must be utilized. Even when MAST values have been identified, failure to confirm the manufacturer’s published numbers can drive up costs and lead times exponentially due to misinterpreted data. Correctly interpreting manufacturer’s data, identifying red flags, partnering with experienced automation groups, and having strong relationships with valve suppliers are all keys to ensuring that an automated valve assembly’s configuration is mechanically correct and cost-effective.

For more information or if you need assistance with valve automation contact:

Supreme Integrated Technologies

Houston:              281 822 5000

Website:              www.supremeintegratedtechnology.com

Blog Authors: Chris Sarro & Jacob Shoesmith

10.2019