Features:​ Dual-coil redundant design — single-coil failure does not disable the protection function, improving protection circuit reliability; extremely fast action, venting safety oil instantly upon receiving trip signal to achieve rapid unit shutdown; built-in position feedback switch for uploading solenoid working status to DCS/ETS; valve body resistant to oil contamination, suitable for industrial on-site turbine oil conditions; de-energize-to-trip logic, auto-triggering unit shutdown protection upon power loss.

Applications:​ ETS trip protection circuits for various steam turbine units; gas turbine emergency protection oil circuits; compressor turbine emergency shutdown protection systems.

Materials:​ Forged steel valve body; hardened stainless steel spool; flame-retardant engineering plastic coil housing; oil-resistant fluororubber seals.

Structure:​ Integrated valve block assembly combining solenoid valve, oil manifold, and position feedback switch into one unit; side hydraulic ports; electrical junction box arranged on the outside; dual independent electromagnetic coils.

Working Principle:​ During normal operation, the coils are energized, the solenoid spool is held, safety oil pressure is established, and the quick-closing valve remains open. Upon receiving a trip signal or system power loss, the solenoid spool shifts, rapidly venting the safety oil back to the tank. The quick-closing valve spring drives the main steam valve to close rapidly, achieving turbine emergency shutdown. The position feedback switch outputs the actual solenoid valve status signal.