Working Principle:​ Gas enters the valve from the system pipeline through the inlet port, passes through the precisely metered port and flows to the turbine combustion system. The external actuator receives command signals from the electronic controller and drives the spool to the target position, changing the gas flow cross-sectional area. The control system regulates fuel supply by precisely managing valve opening, thereby controlling turbine speed, output power and exhaust temperature. The valve design ensures a deterministic and repeatable correspondence between flow and valve position throughout the full stroke range.