This is the smallest rack & pinion series for torques up to 10.000 Nm. It is characterized by the extremely compact and basic design but at the same time it is able to guarantee outstanding resistance and stiffness to the system.
This economical selection of actuators is designed to use the same cylinders and spring packs of the corresponding scotch yoke actuator series in order to guarantee spares parts always available in stock. Thanks to this and other expedients, these actuators can be supplied in a very short time.
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.
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.
Extremely compact body with rigid design
Rack completely supported to absorb lateral forces
In line external travel stop 90° ±4° to eliminate asymmetrical loads
Easily visible local position indicator with Namur interface
Std. temperatures (-30° +100°); low (-60°) and high (+200°) on request
Totally enclosed IP 66 construction; IP 67 and IP 68 on request
Multiple spring design, increased reliability and std. configurations
Suitable for high frequency and high speed operation (< 0.2 s)
modulation and ON/OFF design to operate in all conditions
Compliant to PED 97/23/EC. and ATEX
Hydraulic/Pneumatic, Double/single acting
Manual handwheel override for for double acting and single acting.
Hydraulic override for both pneumatic & hydraulic execution.
Manual override with partial stroke test option.
Fast acting with pneumatic dumper (less then 0.2 seconds)