Precision-engineered MTS servovalves deliver high-flow, quick-response and low-distortion performance for absolute control over hydraulic actuation, helping uphold the highest levels of test data fidelity. Whether controlling the position, load or velocity of hydraulic actuators or exerting careful pressure control, MTS servovalves deliver exceptional resolution and low hysteresis for exacting flow control.
Key Product Features
Durable
Rugged designs for long operating life
Accurate / Repeatable Results
Manufactured to stringent specifications for reproducible results
Precise
Tight tolerances achieve finesse and produce precise moments
Reliable
Complete fatigue tests that run for billions of cycles
Technical Overview
Detailed Technical Specifications
Series 252 Specifications
Maximum operating pressure
31 MPa (4500 psi)
Minimum operating pressure
1.4 MPa (200 psi)
Operating temperature range
-40°C to 135°C (-40°F to 275°F)
Seals
Viton
Rated full-flow input signal current‡
25 mA (series)
50 mA (differential)
50 mA total (parallel)
Coil resistance
80Ω per coil
Weight
252.2x/.4x
252.3x
1.03 kg (2.3 lb)
3.5 kg (7.75 lb)
Recommended hydraulic fluid
Mobil DTE 25 or Shell Tellus 46
Series 256 Specifications
Pilot stage mating connector
MS 3106-A-14S-2S
Pilot stage full flow current
50 mA
Main stage mating connector
PT06 A-8-4S (SR)
Main stage excitation
20 V p-p at 10 kHz
Main stage impedance
200 W minimum at 10 kHz
Main stage sensitivity
0.21 V/V per 2.54 mm (0.100 in.) stroke
Standard operating pressure
21 MPa (3000 psi)
Operating temperature range
-54°C to 135°C (-65°F to 275°F)
Recommended filtration level
3-micron absolute (pilot stage)
12-micron absolute (main stage)
Recommended hydraulic fluid
Mobil DTE 25 or Shell Tellus 46
Seals
Buna-N
Series 257 Specifications
Field coil connector
PT02H-8-3P
Field coil resistance
90Ω
Field coil working current
3.5 A
Voice coil connector
PT02H-8-2P
Voice coil resistance
6Ω
Voice coil working current
3.5 A
First natural resonant frequency
650-700 Hz
LVT connector
PT02H-8-4P
LVT electrical impedance
2kΩ
LVT sensitivity
12.7 mV/cm/sec. (50 mV/in./sec.) minimum
LVDT connector
PT02H-8-4P
LVDT excitation
20 Vp-p at 10 kHz
LVDT sensitivity
0.21 V/V per 2.54 mm (0.100 in.) stroke
Standard operating pressure
21 MPa (3000 psi)
Hydraulic fluid temperature
-40°C to 135°C (-40°F to 275°F)
Seals
Buna-N
Recommended filtration level
3-micron absolute (pilot stage)
10-micron absolute (main stage)
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