FS Series Stainless Steel Valve Actuators

Built to Last 

Due to our belief that actuators should not fail - all QTRCO actuators
feature robust designs and premium materials

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FS Series - Materials of Construction

Mechanism CF8M Stainless Steel

Housing CF8M Stainless Steel

Cylinders 304 Stainless Steel
Optional: Amalga Composite or Aluminum

Pistons CF8 Stainless Steel

Springs Powder Coated Chrome-Silicon Steel
Optional: Stainless Steel

Seals BUNA
Optional: Viton, Silicon

PATENTED FLAT YOKE® ACTUATOR MECHANISM WITH QUAD BODY SLOTS

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.

F Series - Flat Yoke® Actuator

Double-Acting

Torques 500,000 in-lb

Pressure 150 psig

Temperatures -76°F to +450°F

90° Rotation ±5° at each end of travel

F Series - Flat Yoke® Actuator

SPRING RETURN (SINGLE ACTING)

Torques 500,000 in-lb

Pressures 150 psig

Temperatures -76°F to +450°F

90° Rotation ±5° at each end of travel

By incorporating the patented Flat Yoke® actuator mechanism, higher torque outputs are offered in a weight and force balanced design.

Q Series

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

QTROC F SERIES Actuators

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

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

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®

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

Accessories

A wide range of valve actuator accessories make your valve actuator more useful and versatile.