Servo valves do exist in cold storage refrigeration systems, especially in industrial-grade ones that demand high temperature control accuracy and operational efficiency. They are critical control components, with products like Danfoss' ICS series servo valves being commonly used in such systems. Typically working in conjunction with controllers and pilot valves, they play a vital role in precisely regulating the system's pressure and temperature, featuring specific application characteristics as follows:
- Adapting to diverse installation and working condition requirementsServo valves can be integrated into modular combination valves of cold storage refrigeration systems. For instance, the ICS servo valve can be installed in the intermediate module of Danfoss' ICF Flexline™ combination valve. It is compatible with common refrigerants such as ammonia and carbon dioxide, capable of withstanding a temperature range of -60°C to 120°C and a working pressure of 52 bar. It can be installed on both the high and low-pressure sides of the refrigeration system, as well as in different pipeline positions like dry return pipes and wet return pipes.
- Enabling high-precision parameter regulationIt receives instructions from the cold storage control system and operates together with the pilot valve. When the cold storage temperature deviates from the set value, for example, the sensor transmits a signal to the controller, which then drives the servo valve to adjust the spool displacement and valve port opening. This precisely controls the refrigerant flow rate. At the same time, it can also regulate the system's on-off state, keeping the temperature and pressure of the refrigeration system within the appropriate range at all times and avoiding large temperature fluctuations.
- Featuring a flexible and practical structural designMost of these servo valves adopt a modular design, consisting of a valve body, functional modules, and a valve cover. Upgrading the valve can be achieved simply by replacing the functional modules, and even mutual replacement with electric valves is possible without changing the valve body, significantly reducing maintenance and upgrade costs. Additionally, some servo valves are equipped with manual adjustment levers, facilitating manual operation of the main valve under special circumstances and enhancing the reliability of the system's operation.