Medical Ventilator Essentials: The Functions and Characteristics of Pneumatic Proportional Valves
The proportional valve controls the flow of pressurized air through electrical signals to circulate air and gases throughout the entire large pneumatic system. The function of the proportional valve lies between on-off solenoid valves and electro-hydraulic servo valves. When using a proportional valve, the output gas flow is not completely linear with respect to the control signal. Although the proportional valve has non-linear characteristics, it provides a cost-effective way to control forces, speeds, and positional characteristics that require high flow and high-speed response.
Applications in the Medical Device Field
In the medical device industry, there is a growing market demand for miniaturization of products. Engineers responsible for the design and manufacture of breathing equipment (such as ventilators and anesthetic machines) face many severe challenges. End users demand the highest performance and compliance with ever-changing regulatory standards. OEM manufacturers must meet market demands by manufacturing machines that meet both design and performance requirements while reducing costs. To this end, the parts used must meet the needs and help accelerate the design process. Direct drive flow proportional valves can precisely control the gas flow in these machines. They are an indispensable part of the design of ventilators and inspiratory flow systems.
In any given machine, there can be up to twelve flow 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 safety and control units because they keep the gases at the desired level. When choosing a proportional valve, choose one that complies with the latest guidelines, laws, regulations and rules related to medical device manufacturing. The rules are constantly changing to improve the equipment, so make sure the valve selected meets all standards.
Flow Proportional Control Valves
Most ventilators in operating rooms and emergency rooms use the central air system provided by the hospital, which can easily cause air pressure fluctuations. The proportional valve will control these fluctuations and keep the airflow balanced. Depending on the specific application, high-pressure proportional valves can eliminate the need for pressure reducing regulators. The valves we provide can precisely control the flow in ventilator applications that require high flow of oxygen and air with a low supply pressure. Our high-flow proportional valves can use the pressure provided by the air in the hospital pipeline to meet this high-flow requirement, and it needs to be adjusted to a lower pressure to keep the pressure supplied to the ventilator stable. Our high-flow proportional valves can provide a flow of more than 300 liters per minute when the intake pressure is lower than 2 psig.
Applications in the Field of Industrial Equipment - Electrical Pressure Proportional Valves
Not only for medical equipment, but the trend for any kind of machine is to make them smaller. Smaller systems are needed, and using proportional valves with pressure regulation functions can reduce the number of components required to control the flow within the machine. Fewer components in the machine means the machine itself can be smaller.
Our company provides small-sized and light-weight flow proportional valves that are suitable for different intake pressures and large flows. We also provide high-precision and fast-response pneumatic control proportional valves derived from flow proportional valves in some industrial equipment such as laser cutting machines and packaging machines, and the current maximum intake pressure can reach 200 bar.
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Shenyang HOlian Precision instrument co.,Ltd founded in 2017,is specialized production of oxygen generator accessories :Miniature solenoid valve for Portable Medical oxygen generator,4 Way 2 position Medical oxygen generator,3L to 10L Medical Oxygen Generator Solenoid Valve,pressure regulator assembly for oxygen concentrator,Pressure reducing Assembly for oxygen concentrator,Pinhole flowmeter of oxygen concentraror,Pinhole flowmeter of Medical oxygen concentrator,5L flowmeter for oxygen concentrator,Special firesafe Valve for oxygen concentrator,Firesafe Cannula Valve Oxygen Supply Tubing Connector,Oxygen primary filter,Medical Grade Filter,Check valve (material PA6),Check valve (material ABS),Oxygen generator accessories Molecular sieve tank head,Oxygen Concentrator Accessories Air Filters,Oxygen Concentrator Accessories NPT1/8-∅8 Connector,Oxygen Concentrator Accessories NPT1/8-∅10 Connector,Oxygen Concentrator Accessories 3 way Nozzle,Oxygen Concentrator Accessories 90° Nozzle,Mold manufacturing and i jection molding.