F Series FlatYoke® Valve Actuators & Scotch Yoke Actuators
High-cycle, high-speed, high-temperature, high-vibration, throttling, corrosive environments.
F Series - Flat Yoke Actuator
Double Acting & Spring Return
Output Torque 500,000 in-lb
Temperature Range -76°F to +450°F
Pressure 150 psig
F Series Actuator Overview
A unique slotted body concept absorbs 100% of the yoke mechanism's side loading forces leaving the piston rod completely free of bending stresses while allowing termination of the rod at the yoke, and the addition of a weight and force balancing second force module diagonally offset from the first. The balanced weight makes lifting and handling of the actuators safer and easier, while reducing valve neck stress caused by unbalanced scotch yoke actuators. Internally, the balanced forces assure less friction loss and less wear as there is no net force applied to the shaft bushings. Scotch yoke actuators offer a very wide range of torques and can operate on devices that require a quarter turn movement for on/off or various throttling services.
By incorporating the patented Flat Yoke® actuator mechanism, higher torque outputs are offered in a weight and force balanced design.
Related Products
Q Series
Offset cylinders align the piston axis with the pinion gear pitch circle diameter, eliminating the cantilever forces inherent in rack and pinion type actuators. Low friction rollers maintain correct engagement of the stainless steel gearing for absolutely exceptional cycle life.
The reduced friction enables outstanding throttling control as demonstrated in numerous 'typical diaphragm actuator' applications where corrosion or high vibration dictated a better solution
F Series
A unique slotted body concept absorbs 100% of the yoke mechanism's side loading forces leaving the piston rod completely free of bending stresses while allowing termination of the rod at the yoke, and the addition of a weight and force balancing second force module diagonally offset from the first. The balanced weight makes lifting and handling of the actuators safer and easier, while reducing valve neck stress caused by unbalanced scotch yoke actuators. Internally, the balanced forces assure less friction loss and less wear as there is no net force applied to the shaft bushings.
T Series
The T-Series actuator demonstrates how we are committed to making life easier. An OEM of over the road bulk carriers was impressed by the capabilities of our Rack & Gear® actuators and they appreciated our ability to mount to numerous valves simply by selecting the proper adapters and mounting plate.
L Series
Using captured springs and the linear components of our rotary, our L Series Actuators provide a safe, long lasting, low friction, stainless steel substitute for diaphragm types in a smaller package for resistance to corrosion and vibration.
XRCISER®
The standard QTRCO actuator uses a travel stop screw in the end cap to limit outward travel of the actuator piston, and therefore valve travel. In the XRCISER® configuration the pneumatically engaged tandem pistons become the outward travel stop. By confirming tandem piston pressure and position; spurious valve travel is prevented during the partial stroke cycle.
Accessories
A wide range of valve actuator accessories make your valve actuator more useful and versatile.