AFC
Scotch Yoke Actuators Series


This is the smallest Scotch Yoke actuators series designed for torques from 500 Nm to 10.000Nm. It is extremely compact and flexible, it extends only in one side direction and it is particularly suitable for ball and butterfly valves, both ON/OFF than modulation ones.


The welded body is equipped with in-slot gaskets for each coupling zone in order to ensure direct contact between metal parts and avoid reciprocal movements which often cause uncontrolled wear,considerable performance decrease or screws loosening.


This type of actuator can house up to 3 concentric springs, for a total of 7 spring pack configurations covering the widest range of valves. Considering the two typologies of yoke (symmetric and canted) the possible configurations amount to 14.


An innovative engageable handweel manual control, which is perfectly integrated in the body, is directly acting on the guide block ensuring the handling in all conditions. This system is equipped with a security lock to avoid accidental handling.


The actuator is easily and quickly disassembling with standard tools. All the maintenance and

control operations can be easily and quickly carried out thanks to the actuator design which is been expressly studied to facilitate these operations.



Scotch Yoke Actuators Series


This scotch yoke series covers torque values up to 850.000 Nm and it is been studied in detail to ensure high performance and long lasting quality.


Different sets of concentric springs have been designed to reduce dimensions; the spring pack can be separately assembled using screws which are easily accessible from the outside and without the aid of special tools.


With a basic and sturdy design, it takes up a minimal amount of space considering the torque it produces.


A wide range of variants will meet the different requirements of each plant and environmental use.Thanks to AFC expertise and flexibility, other solutions and certifications may be arranged and designed according to the customer specific needs.


Powerful Actuator Series


This is the most powerful actuator series manufactured by AFC. Thanks to the double scotch yoke configuration the actuator is perfectly balanced and easy to move and match to the valve. It is available only in the hydraulic version, it can develop torques up to 1.700.000 Nm and reach less than 4 seconds operating time including time for braking.


A particular Hydraulic dumper system guarantees a rapid and controlled deceleration without

sudden shocks thus avoiding water hammer and the resulting excessive pressurization of the

cylinder.


It is possible to set the damper's efficacy and point of insertion during the braking. The hydraulic communication allows the braking to be simultaneous and perfectly balanced in the two cylinders,reducing shock and vibrations.


Rack and Pinion Series


This is the medium-size rack and pinion series for torques up to 550.000 Nm. Its design is very flexible, there can be many possible configurations thanks to the modular components and to the design specifically studied to satisfy different dimensional and torque needs.


The interface is developed and optimized to allow the interchange of cylinders and spring packs of the corresponding scotch yoke actuators. By doing so, productivity is optimized and it is possible to reduce costs and delivery time.


The pneumatic version employs tandem and triple cylinders up to a diameter of 935 mm in order to ensure a great dimensional versatility and a wide range of pressure to be used.


Rack and Pinion Series


The biggest rack and pinion series has two opposing racks so that the stress on the gear tooth is halved and this allows to obtain a balanced torque on the pinnion.


There can be many possible configurations thanks to the modular components and to the design specifically studied to satisfy different dimensional and torque needs.


Special configuarations that extends in only one side for all the situation with particular installation problems.


A particular Hydraulic dumper system guarantees a rapid and controlled deceleration without

sudden shocks thus avoiding water hammer and the resulting excessive pressurization of the

cylinder.


It is possible to set the dumper’s efficacy and point of insertion during the braking. The hydraulic communication allows the braking to be simultaneous and perfectly balanced in the two cylinders,reducing shock and vibrations.


AFC Gas Over Oil and Direct Gas control system


AFC Gas Over Oil and Direct Gas control system are designed to operate using directly the pipeline gas with pressure up to 1500 psi as their power fluid.


Pipeline gas is drawn off from the pipeline, flows through the filter were it is filtered, dehydrated and sweetened in case of H2S presence, then through the control valves flows into the tank to pressurize oil for the actuator operation (opening or closing).


AFC Gas Over Oil control system can be coupled with linear or quarter-turn actuators to provide torque up to 1.700.000 Nm for ball, butterfly and plug valves or thrust up to 1.500.000 N for gate and globe valves.


In direct Gas execution, the pipeline gas, is filtered and directly used to pressurize the actuator cylinder, avoiding oil and tanks.


Both AFC Gas Over Oil and Direct Gas actuators, are designed for rugged, heavy-duty performance in every environments and in the most heavy working conditions.