*Specification charts are for general reference only, please consult drawing for actual values and tolerances.
The counterbalance valve protects rotation in the event of a hydraulic line failure and protect the actuator against excessive torque loading. Hydraulic Schematic of Optional Counterbalance Valve. The counterbalance valve is optional on-demand. SUN brands or other top brands are available for different requests.
WL30 Series hydraulic rotary actuator is designed for harsh environment. It is heavy duty helical rotary device with torque output from 1900Nm up to 24000Nm at 21Mpa. The WL30 Series has rear flange mounting type and front flange mounting type, with 180 rotation degree and 360 degree rotation. It is widely applied to field of Agriculture, Construction, Mining, Truck/Trailer, Energy, Marine, Material Handling, Military, Marine, etc.
Torque & Valve Performance
Torque Versus Hydraulic Pressure and Loads: The driving torque and holding torque are approximately linear with hydraulic pressure. As moment loads increase, drive torque may be reduced by up to 15%.
Standard Valve for L30-17 and L30-25 180 Degree Models: Manufactured from aluminum, the valve blocks are bolted to a flat mounting pad on the actuator housing. Three bolts secure the valve block to the actuator. See specification pages for valve location. The pilot ratio is 3:1. The valves are set to relieve at 3300 psi ± 300 psi (228 bar ± 21 bar).
Frequently Asked Questions
Q1: What are the available rotation degrees for the WL30 series?
The WL30 Series helical rotary actuators are available in both 180° and 360° rotation configurations.
Q2: What is the maximum torque output of this actuator?
The WL30 Series provides a heavy-duty torque output ranging from 1900Nm up to 24000Nm at a pressure of 21Mpa.
Q3: What mounting options are available?
The series offers versatile mounting options including front flange and rear flange mounting types, as well as double flange output modes.
Q4: How does a counterbalance valve benefit the system?
The optional counterbalance valve protects the rotation in case of hydraulic line failure and shields the actuator from excessive torque loading.
Q5: What is the relief setting for the standard valve?
The standard aluminum valve blocks have a pilot ratio of 3:1 and are factory-set to relieve at 3300 psi ± 300 psi (228 bar ± 21 bar).
Q6: How do load increases affect the drive torque?
While drive torque is generally linear with hydraulic pressure, significant increases in moment loads may reduce drive torque by up to 15%.