The liquid shutoff valve is a three-way valve designed to rapidly shut off all liquid fuel flow and prevent leakage to the turbine. In the de-energized state, the valve diverts inlet flow to bypass ports, preventing pressure damage to positive displacement fluid systems.
The Woodward liquid shutoff valve is a two-stage valve. It uses supply pressure to provide a complete shutoff of fuel flow in 0.09 seconds or less after termination of a solenoid current. Valve closure is due to spring compression assisted by supply pressure.
An inlet screen in the valve prevents contaminants in excess of 40 µm, nominal, from damaging the pilot valve section.
Key features of the LSOV25 are:
- 13 608 kg/h rated flow
- 8274 kPa maximum operating pressure
- Closes in 0.100 seconds
- ATEX Certified
- Optional position switch