MTS Series 244 Actuators - Manual (Page 17)

Description Component Item
hydraulic fluid passed by the high-pressure seal back to the
system hydraulic power supply.
The inner part of the low-pressure/wiper seal provides a
hydraulic seal, while the outer part of the seal functions as a
scraper ring to minimize external contamination of the seals
and bearings. When a high-pressure seal is present, the inner
part of the low-pressure seal wipes hydraulic fluid that gets by
the high-pressure seal and guides the fluid into the drainback
port.
Functional Description
The Series 244 Actuator is a double-acting, double-ended, heavy-duty actuator that operates under precision
servovalve control in MTS closed-loop servohydraulic systems. The actuator is a hydraulically powered piston
that can extend or retract (double-acting). The actuator provides displacement of (or force into) a specimen
or structure for testing. It can also provide equal power in tension and compression (double-ended). The
actuator includes an LVDT which measures the displacement of the actuator.
The Series 244 Actuator is linear and is associated with axial control channels. A linear actuator consists of
a cylinder that contains a piston.
The Series 244 Actuator is designed to accept a wide variety of options and accessories including force and
displacement transducers, pedestal bases, swivel rod ends, and swivel bases. When equipped with the
appropriate options and accessories, the actuator can be configured for precision testing of materials,
structures, and components.
Series 244 Actuators Product Information 17
Introduction