YLH servohydraulic load frames actuators are fatigue rated and cylinder tie rods are preloaded to beyond capacity of actuator.

For increased resistance to eccentric loads which may occur during testing, particularly at failure of structure at end of test, actuators have large rod diameter and long low friction polymer bearings.

Low friction seals for servo-hydraulic applications contribute to efficient operation due to minimal frictional pressure loss.

High precision servovalves installed enable precise operation over a wide range of test speeds, particularly at very low test speeds which are common in structural testing.

High precision fatigue rated load cell are mounted on piston rod via a high resolution alignment fixture. Base mounting may be provided on demand.

Integrated magnetostrictive displacement sensor provides precise feedback signal to the control system.

YLH Actuator Specifications

Model

YLH 100

YLH 200

Capacity at 210 bar

kN

      1000

      2000

Piston diameter

mm

320

460

Piston rod diameter

mm

200

300

Stroke[1]

mm

250

250

Piston velocity max

mm/sec

500

500

Maximum operating frequency

Hz

20

20

Integrated Displacement Transducer

Type:  Magnetostrictive

Displacement resolution

µm

1

Non-linearity

Linearity

% FS

≤ ± 0.01% ( ≤ ± 50 µm)

Repeatability

% FS

≤ ± 0.001% ( ≤ ± 1 µm)

Digital SSI output

bits

16

[1] Other strokes are also available (75mm, 150mm, 250mm, 300mm)