In the turbine protection system, AST solenoid valve JZPK-003B-24DC refers to the automatic shutdown emergency shut-off solenoid valve. The four AST solenoid valves JZPK-003B-24DC are arranged in two groups (one channel and two channel) for the following purposes:
Improve system reliability
Redundant design: When one set of solenoid valves (such as channel one) fails, the other set of solenoid valves (channel two) can still work normally, maintaining the normal operation of the system and ensuring that the turbine will not be shut down or unable to shut down due to a single solenoid valve failure, thereby improving the reliability and stability of the entire protection system.
Online testing and maintenance
One set of solenoid valves can be tested, maintained or repaired while the unit is in operation, without affecting the normal operation of the unit. Through this method, possible problems with the solenoid valves can be detected and dealt with in a timely manner, ensuring that the system is always in good operating condition. At the same time, it also reduces the time and frequency of unit shutdown maintenance, and improves the availability of the unit. Realize fast action and accurate control
Quick oil leakage
In the event of a critical situation requiring emergency shutdown of the steam turbine, two sets of AST solenoid valves JZPK-003B-24DC can act simultaneously to accelerate the oil leakage speed of the main steam valve and the regulating valve oil motor lower chamber, enabling the steam valve to quickly close and quickly cut off the inlet steam of the steam turbine, achieving emergency shutdown and protecting the safety of the steam turbine.
Precise control: Divide the four AST solenoid valves JZPK-003B-24DC into two groups for more precise control of the oil pressure in the AST main pipe. By controlling the on/off states of two sets of solenoid valves separately, the oil pressure of the AST main pipe can be fine tuned according to different operating conditions and protection requirements, ensuring that the regulating system of the steam turbine can work accurately and stably.
Fault oriented safety
This arrangement conforms to the principle of fault safety, which means that when a fault occurs in the system, it can automatically guide to a safe state. In the case of AST solenoid valve JZPK-003B-24DC, even if one set of solenoid valves fails, the other set of solenoid valves can still ensure the release of AST main pipe oil pressure in critical moments, causing the turbine to shut down safely, avoiding unsafe operation of the turbine due to faults, and preventing possible serious equipment damage and safety accidents.
Comply with the principle of fault safety
DFYLSYC-2026-04-13-A
