I. Model and specification of spring return linear hydraulic actuator
1. Demon stration of the type
2. Select the size of the hyrdaulic actuator according to the output force of the open&close valve.
The suggested safety factor for spring return linear hydraulic actuator under normal working conditions is 20%-30%.
For example：
The thrust needed by valve=10KN,valvetravel is 100mm，FC
The thrust considered safety factor=10×(1+30%)=13KN
Oil pressure supply=10Mpa
According to the table of spring return actuators’output,we findoutput thrust of FYG-16R is:
The disc fully close:Spring closed valve thrustF1=14.82KN
The disc fully open: Spring closed valve thrustF2=23.56KN
The disc fully close:Cylinder open valve pullF1=23.243KN
The disc fully open:Cylinder open valve pullF2=14.503KN
All the output thrust is more than valve needed. So we can select model:FYG-16SR80/30X110
II. FYG-SR series spring return hydraulic actuator
1. Thrust parameters of FYG-SR type linear hydraulic actuator
2. Overall dimensions
Remark: “S” on behalf of the actuator stroke
III. Single acting linear spring return electro-hydraulic actuator physical reference figure
Straight stroke single acting hydraulic actuators（Download）
