�ǳ�web Knowledgebase - spider

Designing for Life: Overcoming Pneumatic Challenges in ECMO Systems

Rachel Desenberg — Tue, 25 Mar 2025 16:41:58 +0000

Category:

Extracorporeal Membrane Oxygenation (ECMO) represents one of the most critical and complex applications in medical engineering. Serving as a temporary substitute for the heart and lungs, an ECMO system removes blood from the patient, filters out carbon dioxide, oxygenates the blood externally, and returns it to the body. The pneumatic system that makes this possible must deliver precise, reliable control over every variable—gas concentration, flow rate, and system pressure—often within an extremely limited footprint.

Understanding the Pneumatic Demands of ECMO

The pneumatic control architecture in an ECMO unit is typically divided into three primary areas. First is the regulation of the sweep gas—a controlled blend of oxygen and air responsible for carbon dioxide removal. This process requires fine-tuned, closed-loop control to ensure metabolic stability. The second is the blending of oxygen concentration, or FiO₂, which must be adjustable to meet each patient’s evolving respiratory needs. Lastly, engineers must control the pressure and flow through the membrane oxygenator, maintaining steady operation while avoiding damaging pressure spikes or transients.

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Engineering Constraints: Size, Power, & Performance

From a design standpoint, the challenge begins with miniaturization. These systems are often mobile or transport-capable, meaning every component must meet strict spatial constraints without sacrificing performance. Engineers are routinely forced to balance flow capacity, pressure range, and thermal stability against size and weight targets. Compounding that is the need for redundant safety architecture and deterministic system behavior—valves must actuate precisely, repeatably, and with minimal hysteresis. This becomes especially critical in closed-loop circuits where real-time responsiveness and accuracy directly affect patient outcomes.

Power consumption is another limiting factor, especially for systems relying on battery backup. Valves with high current draw can generate unwanted heat, which risks interfering with nearby sensors or inducing thermal drift in pressure control. Quiet operation is equally important. Valves that emit audible clicks or mechanical vibration can cause issues for sensitive sensor arrays and may contribute to patient discomfort, particularly in neonatal or intensive care environments.

Material Compatibility & Cleanliness Standards

Engineers must also consider cleanliness and regulatory compliance. Components must meet ISO Class 8 or better for use in oxygen-enriched environments. This often involves sourcing valves that are oxygen-cleaned, feature inert internal materials like PTFE or stainless steel, and are free from elastomers that may off-gas under pressure.

Choosing the right valve for ECMO isn't simply a matter of selecting a high-flow or fast-acting model. The ideal solution must feature minimal internal volume to prevent gas mixing, deliver response times on the order of 10 milliseconds or less, operate at low wattage to preserve system power, and provide reliable sealing to ensure zero or near-zero leak rates. Valves must also be capable of high cycle counts with minimal performance degradation, maintaining tight tolerances over time in the face of continuous actuation.

While multiple valve technologies exist, �ǳ�web’s spider-based designs have proven particularly effective in critical care applications due to their compact footprint, rapid response characteristics, and proven longevity. In ECMO systems, spider valves are often employed in both proportional O₂ blending circuits and fast-acting isolation points for sweep gas control. Their consistent performance under tight power and space constraints makes them a natural fit for life-support designs.

Integration Over Selection

Ultimately, the key to success in ECMO development isn’t just about selecting the right valve—it’s about engineering the right solution. Many OEMs work directly with pneumatic specialists to develop custom valve-and-manifold assemblies that reduce part count, simplify assembly, and improve system reliability. These integrated solutions streamline the development process and free engineers to focus on clinical performance rather than component-level plumbing.

�ǳ�web’s experience in life science pneumatics, especially in high-precision oxygen control, makes us a trusted partner for ECMO and other life-support platforms. Whether you're in early-stage development or working to optimize a production system, we understand what it takes to build devices that must perform flawlessly, every time. Ready to get started? Contact us today to discuss your specific application.

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Optimizing Packaging and Automation Systems with �ǳ�web Spider Technology

Rachel Desenberg — Mon, 18 Nov 2024 19:20:04 +0000

Category:

Applications

In the world of packaging and automation, efficiency, speed, and precision are paramount. As industries demand faster throughput and higher-quality products, engineers are constantly seeking valve technologies that can meet these needs. �ǳ�web's Spider Technology offers a unique solution that excels in these environments, providing enhanced durability, fast response times, and ultra low leak characteristics that are crucial for modern packaging and automation systems.

For packaging lines and automated processes, pneumatic control systems are often at the heart of operations, controlling everything from actuators to conveyors to the precise dispensing of products. The valves that regulate these systems must operate efficiently, handle millions of cycles, and fit within increasingly compact spaces. �ǳ�web’s Spider Technology is particularly well-suited to these requirements, offering performance and reliability that stand out in the competitive world of packaging and automation.

The Role of Valves in Packaging and Automation Systems

In packaging and automation systems, pneumatic valves control the flow of compressed air, which is used to move products, actuate mechanical devices, and even control the opening and closing of containers. These systems require valves that can handle frequent cycling with minimal failure rates, respond quickly to changes in control signals, and maintain tight seals to prevent air leaks that could affect performance.

Valves used in these systems are typically actuated either by solenoids (electromagnetic) or by air pressure. Solenoid valves, though commonly used, often suffer from issues such as high power consumption and shorter lifespans due to mechanical wear and tear. This is where �ǳ�web’s Spider Technology shines, offering a compelling alternative for engineers looking to design more efficient pneumatic control systems.

How Spider Valve Technology Works in Automation

�ǳ�web’s Spider valves utilize a unique mechanism that incorporates a spring system with a central plunger surrounded by magnetically responsive "legs." These legs move in response to changes in pressure, and when the valve is actuated, they move outward to create an opening that allows media to flow through. This design results in minimal movement—only 0.007 inches (0.18 mm)—which reduces wear and tear, extends the lifespan of the valve, and minimizes the chance of leakage.

In traditional solenoid valves, the actuator mechanism involves more complex and often larger components that move more significantly. This can result in increased friction, wear, and power consumption. In contrast, the minimal movement and low friction in �ǳ�web’s Spider valves allow for higher reliability, more efficient use of power, and smoother operation, all of which are essential in fast-paced packaging environments.

Key Advantages of Spider Valves in Packaging and Automation

Longevity and Durability

Packaging and automation systems are designed for high-speed operation, often running 24/7, with components frequently subjected to millions of cycles. The long operational life of �ǳ�web’s Spider valves makes them ideal for these applications, where downtime for maintenance or replacements must be minimized. Their durability ensures consistent performance over long periods, reducing both maintenance costs and system interruptions.

In high-speed packaging lines, for example, a pneumatic actuator controlled by a �ǳ�web Spider valve might cycle thousands of times per hour. The valve’s ability to withstand this demanding environment without significant wear is a key factor in ensuring the overall efficiency of the production line.

Fast Response Time

In automation, timing is everything. Whether it’s controlling the speed of a conveyor belt, dispensing precise amounts of liquid into containers, or quickly adjusting the position of robotic arms, pneumatic valves must respond in real-time to control signals. �ǳ�web Spider valves provide rapid actuation, allowing for fast, precise adjustments to be made across the entire system.

The fast response time of �ǳ�web’s Spider Technology can increase the overall throughput of packaging systems, allowing for faster cycle times and higher production rates. This is especially important in environments where throughput is critical, such as food packaging, pharmaceuticals, and consumer goods manufacturing.

Low Power Consumption

Energy efficiency is another significant consideration in packaging and automation systems, especially as companies work to reduce operating costs and energy consumption. �ǳ�web’s Spider valves require minimal power to operate—much less than traditional solenoid valves. This can lead to reduced energy costs, especially in high-cycle systems.

In portable or battery-powered automated systems, such as mobile packaging units or smaller robotic applications, the low power consumption of �ǳ�web’s Spider valves makes them especially beneficial. They help extend the life of the battery or reduce the overall energy demand of the system, contributing to more sustainable operations.

Compact Design and Reduced Internal Volume

Packaging lines and automated systems often require valves that fit into compact spaces. �ǳ�web Spider valves are designed with minimal internal volume, meaning they take up less space while still delivering the performance needed for high-precision control. This is particularly advantageous in applications where every millimeter of space counts.

For example, in high-density robotic packaging stations or small-scale automated assembly lines, integrating a low-volume valve can help keep the system compact while ensuring that it operates efficiently. The reduced internal volume also contributes to faster response times, as there is less air to move through the system.

Reduced Vibration and Noise

In noisy manufacturing environments, minimizing vibrations and mechanical noise can improve the working conditions for operators and reduce overall wear on machinery. �ǳ�web Spider valves are known for their quiet operation, which is especially beneficial in packaging lines that use pneumatic actuators to perform delicate tasks, such as capping bottles or sorting products. The low noise and vibration levels help maintain smoother, quieter operation.

Superior Leak Resistance

Leaks in pneumatic systems can be costly. Even small leaks can affect system performance, reduce efficiency, and increase maintenance requirements. �ǳ�web’s Spider Technology provides enhanced leak resistance compared to conventional solenoid valves. This ensures a more efficient and reliable operation, especially in high-precision applications. In the context of packaging, leaks could lead to inconsistent product sealing or inaccurate dispensing, causing production delays or product waste. With their ultra low leak characteristics, �ǳ�web Spider valves help maintain the integrity of the system and prevent such issues from arising.

Use Cases for Spider Valves in Packaging and Automation

Product Sorting and Positioning

In automated packaging lines, �ǳ�web Spider valves are useful for controlling the movement of products on conveyors or in robotic arms. The valves are able to actuate pneumatic cylinders to push, position, or lift items, ensuring precise placement into containers or packaging. Their fast response time and high cycle life make them ideal for high-speed, high-precision sorting systems, which need to operate seamlessly to prevent delays or errors.

Fluid Dispensing and Filling

In industries like food and beverage, pharmaceuticals, or cosmetics, precise fluid dispensing and filling are essential. �ǳ�web Spider valves, with their ability to provide consistent control with minimal leakage, are a good choice for automated filling machines to regulate the flow of liquids or powders into containers. Their compact size allows them to be integrated into filling heads or dosing units without taking up too much space, while their low-power operation helps reduce energy consumption in the system.

Packaging Sealing and Capping

Pneumatic sealing and capping systems rely on valves to control the actuation of machinery that secures caps or seals on bottles, jars, or boxes. The quick response times and minimal wear of �ǳ�web’s Spider Technology makes it perfect for controlling these precision movements, ensuring that each container is properly sealed without delay or malfunction.

Robot-Assisted Packaging

In automated packaging systems that use robotic arms to handle products, �ǳ�web Spider valves are an excellent choice for controlling the movement of robots and their grippers. Their fast actuation and minimal maintenance requirements ensure that robots can function efficiently and accurately, handling items ranging from small consumer goods to larger, heavier packages.

Conclusion

�ǳ�web’s Spider Technology provides advanced-level pneumatic control that has been proven time and time again. It offers packaging and automation engineers trusted solutions that balance speed, precision, power efficiency, and reliability. Whether you’re designing a high-speed packaging line or a precision automation system, incorporating �ǳ�web’s Spider Technology will improve efficiency, reduce downtime, and contribute to a more sustainable, high-performance operation. For engineers seeking reliable, ultra low leak valves that can handle the rigors of continuous operation, �ǳ�web Spider valves provide the ultimate solution.

Ready to learn more about optimizing your application with �ǳ�web’s Spider Technology? Contact us today for more information or to discuss your specific needs.

Precision and Reliability in Critical Medical Applications

Rachel Desenberg — Tue, 12 Nov 2024 17:52:11 +0000

Category:

Applications

When it comes to critical applications, medical devices stand at the forefront, particularly those that are life-sustaining. In the world of medical technology, devices like artificial hearts and ventilators are essential in supporting or replacing vital physiological functions. For these machines to perform reliably, they rely on components that are not only exceptionally precise but also capable of enduring the rigorous demands of continuous operation. This is where �ǳ�web valves come into play, offering robust and innovative solutions designed to meet the exacting standards of the medical field.

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Artificial Heart Contraction Control

In artificial heart devices, precision is paramount. These life-sustaining machines rely on a delicate balance of timing and pressure to replicate the natural rhythm of a human heartbeat. �ǳ�web valves are integrated into these systems to pilot diaphragm pumps, which operate by creating pulses that mimic the contraction and relaxation of a beating heart. Through finely tuned control of pressure and timing, �ǳ�web valves enable artificial hearts to achieve the consistency and reliability essential for patient survival.

Ventilator Air Flow and Gas Blending

�ǳ�web valves also play a crucial role in ventilator systems, another critical area within life-support technology. Ventilators depend on �ǳ�web valves to pilot diaphragm pumps, which regulate the exact volume or pressure of air delivered to patients. In assist-control ventilator modes, the valve helps regulate a steady breath rate and volume, while in pressure-control modes, it maintains constant pressure to assist breathing.

In addition to this, �ǳ�web valves are integral to gas blending within ventilators, combining oxygen and other gases to create a controlled mixture suitable for patients’ respiratory needs. This level of precise control, enabled by �ǳ�web’s advanced valve technology, supports ventilators in providing safe and effective respiratory assistance.

What makes �ǳ�web valves particularly suited for these high-stakes applications? It all boils down to a unique and time-tested technology known as the �ǳ�web Spider.

�ǳ�web Spider Technology

The �ǳ�web Spider, invented and patented by �ǳ�web in 1973, revolutionized valve technology. This deceptively simple design features a flat armature with a central plunger, resulting in a minimalist mechanism that significantly enhances reliability and performance. Here’s why this design has proven so effective in medical applications:

This technology has since been copied and mimicked by other manufacturers, but none have come close to perfecting it. Today, �ǳ�web’s EV series—the original “spider” valve—remains the industry standard for long life and low leak. Building on this legacy, �ǳ�web offers a wide range of valves that utilize this tried-and-true spider technology to meet the needs of many different industries and applications. All �ǳ�web spider valves are extremely low leak. They provide exceptional reliability; long lifespans; and fast, precise control. They also consume very little power and have minimal internal volume.

• Minimal Movement
  With movement as small as 0.007" (0.18 mm), �ǳ�web's Spider
Technology minimizes wear and tear, extending the valve's operational life.

• Fast Response Time
  �ǳ�web's Spider Technology design allows for rapid actuation,
essential in applications where timing is critical.

• Low Vibration and Noise
  Particularly in a hospital or critical environment, quiet operation
is important for patient comfort and undisturbed operation.

• Low Power Consumption
  �ǳ�web's Spider Technology valves require minimal power, supporting the
energy efficiency required in portable or battery-operated medical devices.

• Reduced Internal Volume
  Less internal volume translates to a more compact design,
ideal for integration into devices where space is at a premium.

• Longevity
Tested to withstand over 1 billion cycles, �ǳ�web's Spider Technology
valves offer unmatched durability.

These benefits make �ǳ�web valves a trusted solution for manufacturers of medical devices and other critical applications. If you’re looking for expert assistance in designing or implementing precision pressure or flow control solutions, contact �ǳ�web today.

�ǳ�web's Spider Technology

Rachel Desenberg — Fri, 11 Nov 2022 20:35:07 +0000

Category:

Product Information

In 1973, �ǳ�web patented a new valve design that utilized a unique sealing mechanism to improve performance and reliability. The design was a significant advancement and helped establish �ǳ�web as a leading innovator in the field of pneumatic control. It featured a seal that was held in place by a very special spring, which consisted of a central plunger surrounded by several magnetically-responsive “legs” that moved in response to changes in pressure. When the valve was actuated, the legs moved outward, creating an opening that enabled media to flow through. It became known as the �ǳ�web “spider.”

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Spider Valves Compared to Solenoid Valves

• Longer life—1,000,000,000+ cycles
• Lower vibration and noise
• Lower power
• Faster response time
• More compact and lightweight
• Less internal volume
• Better leak resistance

Benefits of Spider Technology

Spider valves are well-suited for a broad range of medical, analytical, and niche industrial applications including biomedical, dental, test equipment, oxygen control, textile, packaging, pressure control, automation and portable systems. Ready to learn more about how your application might benefit from �ǳ�web's Spider Technology? Contact us today to discuss your specific application requirements.