Liquid filling design: The pressure gauge case is filled with liquid, usually silicone oil or glycerin. The purpose of liquid filling is to dampen the oscillation of the pointer, reduce the impact of vibration on the reading of the pressure gauge, especially suitable for measuring pressure media with vibration or pulsation. It can stabilize the pointer indication, extend the service life of the pressure gauge, and also help protect the internal movement components.
Electrical contact function: Equipped with an electrical contact device, it can control the upper and lower limits or transmit signals according to the set pressure value. When the pressure reaches or exceeds the set upper limit or falls below the set lower limit, the electrical contact will close or open, thereby achieving automatic control, alarm or interlocking control of pressure with other equipment. It is widely used in industrial automation control systems, hydraulic systems, pneumatic systems and other occasions that require precise control and monitoring of pressure.
Liquid filled electric contact pressure gauges are widely used in various fields such as industry, construction, and healthcare due to their unique performance. The following are some common application scenarios:
Industrial Production
Chemical industry: In the process of chemical production, it is often necessary to measure and control the pressure of various corrosive, viscous, or high-temperature media. The liquid filled electric contact pressure gauge can adapt to harsh working environments, and its liquid filled design can effectively dampen the pulsation and vibration of the medium, ensuring accurate measurement. At the same time, the electrical contact function can achieve automatic control of pressure. When the pressure exceeds the set range, a signal is promptly sent to control the start and stop of related equipment, ensuring production safety.
Power industry: In power plants, liquid filled electrical contact pressure gauges are used to measure the pressure of media such as steam, water, and oil. For example, during the operation of a steam turbine, precise monitoring of steam pressure is required to ensure the normal operation of the unit. The electric contact pressure gauge can automatically control the opening of the steam valve based on the set pressure value, achieving stable pressure regulation.
Metallurgical industry: In metallurgical production processes such as blast furnace ironmaking and converter steelmaking, it is necessary to monitor and control the pressure of various gas and liquid media. The liquid filled electric contact pressure gauge can work stably in harsh environments such as high temperature and dust, providing accurate pressure data for the production process, and achieving automatic pressure control through the electric contact to ensure the stability of the production process and product quality.
Architecture and Infrastructure
Water supply and drainage system: In urban water supply and drainage systems, liquid filled electric contact pressure gauges are used to monitor and control the outlet pressure of water pumps, water level pressure of water towers, etc. By setting the appropriate pressure value, the electric contact pressure gauge can automatically control the operation of the water pump, achieve constant pressure water supply, ensure the stable operation of the water supply system, and meet the water needs of residents and industries.
Air conditioning and HVAC systems: In air conditioning and HVAC systems, it is necessary to monitor and control the pressure of refrigerants, cooling water, hot water, and other media. The liquid filled electric contact pressure gauge can monitor system pressure in real time. When the pressure is abnormal, a signal is sent through the electric contact to activate the protective device, preventing damage to the system due to high or low pressure. It also helps optimize system operation and improve energy utilization efficiency.
medical hygiene
Medical gas supply system: In the medical gas supply system of hospitals, precise control of gas pressure is required during the transportation and use of gases such as oxygen and compressed air. The liquid filled electric contact pressure gauge can monitor gas pressure in real time, ensuring the stability and safety of gas supply. When there is abnormal pressure, the electrical contact will emit an alarm signal to remind the staff to handle it in a timely manner, ensure the normal supply of medical gas, and avoid affecting the patient's treatment.
Medical devices: In some medical devices, such as ventilators, anesthesia machines, etc., liquid filled electrical contact pressure gauges are used to monitor and control the pressure of gases or liquids. By precisely controlling pressure, we ensure the normal operation of medical devices and provide safe and effective treatment for patients.
In addition, liquid filled electric contact pressure gauges are also used in aerospace, automotive manufacturing and other fields, playing an important role in engine testing, hydraulic system monitoring in aerospace, as well as pressure monitoring and control of braking systems and power steering systems in automotive manufacturing.
