MTS Series 256 Servovalve - Manual (Page 17)

Specifications
Series 256 Servovalve Product Information Introduction 17
Specifications
The following subsections list the general specifications, performance
specifications, and performance characteristics of the Series 256 Servovalve.
Series 256 Servovalve General Specifications
The following table shows the specifications that are common to all Series 256
Servovalves.
P ARAMETER S PECIFICATION
Temperature range -54°C to +135°C (-65°F to +275°F)
Operating pressure*
Maximum
Minimum
The normal operating pressure is 21 MPa (3000 psi)
21 MPa (3000 psi)
1.3 MPa (100 psi)
Recommended hydraulic fluid ‡
Pilot stage filtration
Main stage filtration
Mobil DTE 25 or Shell Tellus 46
3 microns absolute
12 microns absolute
Seals
Buna-N Standard †
LVDT
Excitation
Impedance
Sensitivity
.
20 V p-p at 10 kHz
200 ¾ minimum at 10 kHz
0.21 V/V per 2.54 mm (0.100 inch) stroke
Pilot stage full flow current 25 mA (series)
50 mA (differential)
50 mA (parallel)
Weight
256.04-01
256.05-01/02
256.09-01/02
256.18-01/02/05
256.25-01/02/05
256.40-01/02/05/10 6.3 kg (14 lb)
7.3 kg (16 lb)
7.3 kg (16 lb)
9.3 kg (12 lb)
20.4 kg (43 lb)
45.4 kg (100 lb)
* Higher operating supply pressures up to 41 MPa (6000 psi) are available on request (contact MTS for
information.
† Special seals are available on request on some 256 Models (contact MTS for information).
‡ For information on hydraulic fluid and hydraulic system care, see the Hydraulic Fluid Care Guide (MTS
part number 050-000-536).