Key Factors to Keep in Mind When Selecting a Hydraulic Proportional Valve
As the demand for advanced medical equipment grows, companies are exploring the nuances of designing hydraulic proportional valves. With expectations for efficiency and compliance, engineers face critical challenges in production. Trends indicate that minimizing the size of valves while enhancing functionality is paramount, especially for respiratory equipment like ventilators. Within this context, it's crucial to delve into ten key factors that will aid in choosing the right hydraulic proportional valve.
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Understanding Valve Functions
In various medical devices, a multitude of proportional control valves are often implemented. These valves are strategically positioned to manage gas flow and mitigate risks of over-pressurization. Effectively functioning valves are not just components; they are critical safety devices ensuring the gases are dispensed accurately.
Essential Considerations When Selecting a Proportional Valve
Prior to decision-making, it's imperative to evaluate the specific design and functional requirements of the application. Keep in mind that there is no universal solution — each machine designer is prepared to determine the most appropriate valve based on the application needs.
Regulatory Compliance
Selecting a valve that aligns with the latest guidelines and regulations is vital for any medical device. As standards evolve, ensure your chosen valve adheres to these requirements for safety and performance.
Air Source Management
In hospital settings, ventilators operate using plumbed air that may exhibit varying pressure levels. A well-engineered proportional valve offers the capability to stabilize these fluctuations, an essential function for maintaining consistent airflow. High-pressure proportional valves may provide advantages, such as eliminating the necessity for a pressure reducing regulator.
Our offerings include valves adept at managing airflow in high-demand ventilator applications, with capabilities to achieve over 300 liters per minute at pressures below 2 PSIG.
Understanding Hysteresis
Hysteresis plays a critical role in valve performance, impacting flow variance at specific set points when making adjustments. High-performance valves designed with low hysteresis can minimize control challenges in applications requiring precise flow rates, achieving hysteresis percentages as low as 2%.
Our Low Hysteresis Proportional Valve is specifically tailored for systems demanding such precision, proving to be an effective solution.
Conclusion on Device Size
A major trend within the industry is the push for smaller machinery. Utilizing compact proportional valves may help decrease the quantity of required components, leading to design efficiency. For instance, Kelly Pneumatics provides a High Flow Miniature Proportional Valve capable of supplying over 100 SLPM of gas flow while weighing only a quarter of a pound.
Gas Compatibility Considerations
When selecting a valve, ensuring compatibility with the intended gas type is essential. The calibration must align with specific application needs, especially in anesthesia contexts. Our valves utilize three elastomer variants—Viton, EPDM, and Buna-N—but are adaptable to meet stringent requirements using customized elastomers and materials like stainless steel for handling corrosive substances.
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