Essential for Medical Ventilators: Functions and Characteristics of Miniature Proportional Valves

Characteristics of Micro Proportional Valves

Micro proportional valves control the flow of pressurized air through electrical signals, allowing air and gases to circulate throughout large pneumatic systems. The function of micro proportional valves lies between on-off solenoid valves and electro-hydraulic servo valves. When using micro proportional valves, the output airflow rate is not entirely linear relative to the control signal. Despite their non-linear characteristics, micro proportional valves provide a cost-effective method to control force, speed, and position characteristics requiring high flow and high-speed response.

Application of Micro Proportional Valves in Medical Devices

In the medical device industry, there is a growing market demand for miniaturization of products. Engineers responsible for designing and manufacturing respiratory equipment (such as ventilators and anesthesia machines) face many severe challenges. End users demand the highest performance while complying with ever-changing regulatory standards. OEM manufacturers must meet market demand by producing machines that conform to design and performance requirements while reducing costs. Therefore, the parts used must meet the requirements and help expedite the design process. Directly driven flow micro proportional valves can precisely control the gas flow within these machines. They are an indispensable part of ventilator and inhalation flow system designs.

In any given machine, there can be up to twelve flow micro proportional valves. They are usually located somewhere in the middle of the system, providing gas flow control and preventing pipeline overpressure. The valves and many other components in the machine are units of safety and control as they keep gases at the required levels. When selecting micro proportional valves, be sure to choose ones that comply with the latest guidelines, laws, regulations, and rules related to medical device manufacturing. Rules constantly change to improve equipment, so ensure the selected valves meet all standards.

Most ventilators in operating rooms and emergency rooms use a central air system provided by the hospital, which can easily cause air pressure fluctuations. Micro proportional valves will control these fluctuations and maintain airflow balance. Depending on the specific application, high-pressure micro proportional valves can eliminate the need for pressure regulators. Keyto offers valves that can precisely control the flow in ventilator applications, which require high flows of oxygen and air at lower supply pressures. Keyto micro proportional valves can use the pressure provided by the air in hospital pipelines to meet this high flow demand, requiring it to be regulated to a lower pressure to maintain the pressure supplied to the ventilator. High-flow micro proportional valves can deliver over 300 liters per minute at an inlet pressure of less than 2 psig.

Keyto is an ideal supplier of micro proportional valves. Our professional, high-quality products, cutting-edge technology, and customer support provide you with a comprehensive and reliable solution.