Donjoy new generation of pneumatic globe valves, powered by compressed gas, are responsible for shutting off or connecting media flow, ensuring the orderly operation of the entire industrial process. Their operating principle is based on the action of a pneumatic actuator. When the external control signal changes, the pneumatic actuator converts air pressure into force, controlling the valve opening to control the flow of the fluid, thereby achieving fluid control. When the pneumatic piston receives a signal from the control air source, it pushes the valve stem downward, separating the valve disc from the valve seat, opening the valve and allowing smooth flow of the medium. Conversely, when the actuator receives a signal from the control air source to close, the pneumatic piston pulls back the valve stem, allowing the valve disc to tightly contact the valve seat, closing the valve and preventing the flow of the medium.
Performance Advantages: 1. Structure and Flow Resistance: The new generation of pneumatic globe valves boasts a highly compact structure and a small footprint. This effectively conserves valuable space in industrial plants, facilitating the layout of other equipment. Furthermore, their low flow resistance allows for smoother flow of media in pipelines, reducing energy loss and significantly improving industrial production efficiency. This is analogous to unobstructed lanes on a highway, allowing vehicles to travel quickly and improving transportation efficiency. 2. Opening and Closing Characteristics: During opening and closing, the new generation of pneumatic globe valves are silent, have no dead angles, and exhibit zero leakage, making them excellent performers in applications with stringent environmental and media requirements. In the food and beverage industry, production processes require strict hygienic controls. Any leakage could lead to product contamination and compromise food safety. The zero-leakage characteristics of pneumatic globe valves ensure a clean production environment and guarantee product quality. In the pharmaceutical industry, their lack of dead angles prevents drug residue, ensuring drug purity and efficacy. 3. Installation and Usage Flexibility: They can be reversibly installed, allowing for both normally open and normally closed modes using the same actuator, providing significant user convenience. In practice, users do not need to prepare multiple actuators for different operating modes, reducing equipment procurement costs and maintenance workload. 4. Replaceable disc design: Conventional and adjustable discs are freely interchangeable to meet different usage requirements. When production processes change and precise adjustment of media flow is required, users can easily switch functions by simply replacing the adjustable disc, without having to replace the entire valve. This saves time and costs while increasing equipment utilization.
