1-General Standard Name
Steam-water sampling solenoid switching valve, instrument automatic diversion & cut-off valve.
2-Structural Features
·Connection Type: Both ends are equipped with stainless steel welded pipe nozzles, suitable for butt-weld connection with seamless instrument steel pipes in power plants. The installation is convenient with strong sealing performance, fully complying with the installation standards of steam-water sampling pipelines.
·Actuation and Control Structure: Driven by an electromagnetic coil, enabling automatic ON/OFF control through electrical signals. The valve body features a compact structure and fast response action, allowing rapid shut-off of the medium passage under abnormal operating conditions.
·Valve Body Material: The entire valve body is forged from 304/316 stainless steel with a pressure rating of PN25, offering corrosion resistance and high-pressure resistance, suitable for high-temperature/high-pressure steam-water and clean process media applications.
·Core Function: Specifically designed for power plant steam-water sampling systems, featuring dual functions of overpressure protection and automatic shut-off. When the sample water pressure rises abnormally, the protection valve automatically closes to prevent high-pressure media from impacting and damaging downstream online analytical instruments (such as conductivity analyzers, pH meters, dissolved oxygen analyzers, etc.). It is a critical protective component for the safe operation of instrumentation systems.
3-Application
1.Electric Power & Energy Industry (Core Application)
Standard valve used in steam-water sampling systems, high-temperature/high-pressure sampling panels, and low-temperature instrument panels in thermal power plants, CHP plants, and nuclear power plants.
Installed at the front end of online analytical instruments as the final safety barrier for the instruments. In the event of pressure fluctuation or overpressure, it automatically shuts off the sample water to protect expensive analytical instruments from damage.
Used for safety control in steam-water sampling circuits of boilers, steam turbines, and other thermal systems.
2.Petrochemical Industry
Used in online process medium sampling systems in refineries and natural gas processing plants to protect precision analytical instruments from damage caused by high-pressure and impact media.
Provides safety shut-off and protection for corrosive media and high-pressure gas sampling pipelines.
3.Instrumentation & Automation Industry
Supporting protection valve for online water quality/gas analysis systems, enabling automatic safety control of instrument circuits.
Provides gas/liquid circuit protection for laboratory precision analytical instruments, preventing irreversible equipment damage caused by sudden pressure fluctuations.
4.Metallurgy & New Energy Industry
Used for instrument safety protection in steam-water sampling systems of metallurgical waste heat power generation and captive power plants, as well as process fluid analysis circuits in photovoltaic and lithium battery industries.
