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Ledeen ™ Valve Actuators FLOW CONTROL Modular Assembly. . . . . . . . . . . . . . . . . . . . . . . 3Frame Design. . . . . . . . . . . . . . . . . . . . . . . . . . . 4Power Cylinder and Spring Cartridge Design. . . . . . . . . . . . . . . . 5Quarter-Turn Pneumatic. . . . . . . . . . . . . . . . . . . 6Quarter-Turn Hydraulic. . . . . . . . . . . . . . . . . . . . 7Quarter-Turn Gas-Over-Oil. . . . . . . . . . . . . . . . . 8Quarter-Turn Direct Gas. . . . . . . . . . . . . . . . . . . 9Linear Pneumatic. . . . . . . . . . . . . . . . . . . . . . . 10Linear Hydraulic. . . . . . . . . . . . . . . . . . . . . . . . 11Linear Gas-Over-Oil. . . . . . . . . . . . . . . . . . . . . . 12Multi-Turn Electric. . . . . . . . . . . . . . . . . . . . . . . 13Multi-Turn Manual Gearboxes. . . . . . . . . . . . . 14Multi-Turn Subsea Gearboxes. . . . . . . . . . . . . 15Quarter-Turn Subsea. . . . . . . . . . . . . . . . . . . . . 16Linear Subsea. . . . . . . . . . . . . . . . . . . . . . . . . . 17Test Facility-Subsea. . . . . . . . . . . . . . . . . . . . . . 18Hydraulic Power Unit. . . . . . . . . . . . . . . . . . . . 19Controls – High Pressure Gas. . . . . . . . . . . . . . 20Controls – Low Pressure Pneumatic. . . . . . . . 21Position Monitoring Switches. . . . . . . . . . . . . 22Quarter-Turn Pneumatic (Model VA). . . . . . . . 23 Providing dependable performance for over 50 years, Ledeen valve actuators have created a presence in the market. Now a part of theCameron product line, Ledeen will continue itsexposure to a wide variation of applicationrequirements and environmental conditions,bringing a significant accumulation of valuable,field-proven experience. By applying the knowl-edge gained into actuator design enhancements,Cameron is able to provide equipment that hasoutstanding performance characteristics with minimal maintenance requirements. Ledeen offers multiple frame sizes, torque output and yokeoptions for modular assembly customization. Extensive Experience. CONSISTENT AND FLEXIBLE Consistent engineering design and efficient modularassembly allows maximum operational flexibility to be achieved. Double acting, spring fail close/open ormanual override operations are combinations that arereadily obtainable on the low pressure air, high pres-sure gas or hydraulic products. This maintains productconsistency throughout any project requirement,regardless of valve size, class, actuator supply medium,pressure or actuator function (DA/SR) requirements. As a result, all products can be safely and confidentlyoperated by personnel. In addition, the consistentdesign provides for a significant reduction in the quantity of recommended spare parts and seal kits,which minimizes costs within maintenance programs. FLOW CONTROL LOW PRESSURE CYLINDERSYMMETRIC YOKELOW PRESSURE CYLINDERSPRING CARTRIDGEFRAMEHYDRAULIC HAND PUMPCANTED YOKEHYDRAULIC HAND PUMPMECHANICAL OVERRIDESPRING CARTRIDGEHIGH PRESSURE CYLINDERHIGH PRESSURE CYLINDERMECHANICAL OVERRIDE Modular Assembly 3 STANDARD FEATURES ã Scotch yoke mechanism generates powerful openingand closing torque outputsã Steel fabricated frame provides rugged foundation of modular assembliesã Chrome plated side load bar with guide block foreffective elimination of piston rod deflectionã Bronze bushing interfaces provide low friction supportof sliding and rotating componentsã Aluminum bronze sliding blocks for a low friction, low stress pin connection Frame Design SYMMETRIC YOKE DESIGN (GS, SY, ST) ã Provides conventional torque outputã Equivalent break and end torque values CANTED YOKE DESIGN (MT, HT) ã Provides unique torque outputã Maximizes break and reseat torque values4
