The Woodward Gas Stop/Ratio Valve performs a dual function for industrial and utility gas turbines: rapid fuel shutoff to the turbine control system and accurate control of gas fuel pressure at the outlet feeding the fuel control valve. Its modular design accommodates a variety of stroke, force output, and mechanical interface arrangements while meeting critical control characteristics.
Key Features
Design
- Dual function: rapid fuel shutoff and outlet pressure regulation
- Modular design accommodates various stroke and force requirements
- Quick and easy field assembly or removal
- On-board hydraulic filter
- Electrohydraulic servo valve for precise positioning
- Hydraulic trip valve with high operating force margins and flow capacity
Reliability
- Long actuation rod reduces side-loading on shaft and seals
- Heavy-duty linear slide rings accommodate remaining side loads
- Output forces exceed opening/closing requirements with margin
- Reliable operation even with contamination or wear
- Single-acting hydraulic cylinder
- Dual LVDTs standard; triple LVDTs optional on 6-inch and 8-inch valves
- Extended service life in severe conditions
Applications
- Industrial and utility gas turbine fuel systems
- Gas turbine fuel shutoff and pressure regulation
- New installations and retrofit turbine packages
- Critical service applications requiring high reliability
Drake Controls Services
Drake Controls is a Woodward Authorized Distributor. We stock Gas Stop/Ratio Valves and provide repair, overhaul, and field support. For repair or overhaul, submit a repair request or email service@drakecontrols.com.