30 SERIES

MICRO SERVO VALVES

A high response, high efciency valve

in a compact package

ADVANTAGES

• High response improves control

capability

• Compact light weight package for

mobile applications

• Can be used in extreme

temperature environments

• Stainless steel body suitable for

use in aggressive operational

settings

• Magnetically adjusted null ow

independent of other system

parameters allows for adjustment

in the eld

APPLICATIONS

• Remotely operated vehicle

• Automated guided vehicle

• Manipulators

• Downhole tools

• Entertainment

• Mobile robotics including

construction

The 30 Series is a two-stage, ow control, double-nozzle, mechanical feedback

servo valve with a stainless steel body and integrated torque motor in an envi-

ronmentally sealed compartment. The valve’s nozzle-apper design is a reliable

and proven technology for applications that require high response, stability

and accuracy within a compact package.

The 30 Series Servo Valve is designed to perform reliably over a long service

life even in potentially extreme environments, where temperatures might drop

to -40 °F (-40 °C) or be as high as 400 °F (204.4 °C). The stainless steel body and

a self-contained envelope provide a rugged construction, that allows the valve

to be used in environments with potentially high acceleration, or where they

are exposed to high shock and vibration. This product is part of our micro-hy-

draulic offering which delivers high power to weight ratio and high efciency.

It achieves this all while delivering high dynamics and precise ow control for

better overall system control.

WHAT MOVES YOUR WORLD

Compact, light-weight package with a high power to weight ratio.

Micro-hydraulics are ideal for applications requiring high power density.

RESPONSE PLOT

PERFORMANCE CURVE

GENERAL TECHNICAL SPECIFICATIONS

DYNAMIC TECHNICAL SPECIFICATIONS

Typical responses for peak sinusoidal inputs of ±25 % and

±100 % rated current

Supply 210 bar (3,000 psi)

Oil temperature 38 °C (100 °F)

Weight 185 g (6.5 oz)

Maximum operating pressure

310 bar (4,500 psi)

Rated ow

0.47 to 6.9 l/min (0.125 to 1.85

gpm) @ ∆p 70 bar (1,000 psi)

Mounting pattern 0.48 in. port circle

[ISO 10372-01-01-0-92]

Static performance

Rated ow tolerance ±10 %

Linearity < ±7 %

Null region < ±3 %

Null bias < ±3 % initial; < ±5 % long term

Hysteresis < ±3 %

Threshold < ±1 %

Operating temperature

Standard model with FKM

seals (option 8, V)

-20 ºF to +300 ºF

(-29 ºC to +149 ºC)

Standard model with BUNA

seals (option 8, N)

-40 ºF to +275 ºF

(-40 ºC to +135 ºC)

High temperature model with

FKM seals and high tempe-

rature components (contact

Moog for ordering information)

-20 ºF to +400 ºF

(-29 ºC to +204 ºC)

Internal leakage @ 3,000 psi

< ±3 % rated ow plus < 0.50 cis

tare

Proof pressure

415 bar (6,000 psi) max (supply),

275 bar (4,000 psi) (return)

Burst pressure

690 bar (10,000 psi) max (supply),

345 bar (5,000 psi) (return)

Shock resistance

Will withstand 100 g peak any axis

Vibration resistance Will withstand 25 grms (5 to

2,000 Hz) 30 minutes per axis

SPECIFICATIONS

Response limits at +/- 25 % input and 210 bar (3,000 psi) supply

per table:

Frequency of 90 degree phase

200 Hz

Step response time for 0 to 100 % stroke 2.5 ms

Amplitude ratio < 2 dB

First order time constant

1.5 ms

2nd order natural frequency 200 Hz

Damping ratio 0.50

±25 %

±100 %

Amplitude ratio [dB]

Phase lag [degree]

Frequency [Hz]

5003002005

20 30 50 70 100

120

150

-12

-9

-6

-3

35 70 105 140 175 210 245 280 315

(500) (1,000) (1,500) (2,000) (2,500) (3,000) (3,500) (4,000) (4,500)

16.0

(4.2)

14.0

(3.7)

12.0

(3.2)

10.0

(2.6)

8.0

(2.1)

6.0

(1.6)

4.0

(1.1)

2.0

(0.5)

Rated Valve Pressure Drop bar (psi)

Rated Flow lpm (gpm)

-030 -1002

-030 -1001

-030 -1003

COIL RESISTANCE

The effects of coil resistance changes can be essentially eliminated

through the use of a current feedback servoamplier having a high

output resistance, such as the Moog IN123-825 buffer amplier.

MAGNETIC NULL ADJUST

The null ow of a servo valve can be adjusted independently of other

system parameters. The magnetic null adjustment permits a mini-

mum of 15 % adjustment of the null ow. The null adjuster is located

at the top of the motor cap which, when rotated, biases the rst

stage torque motor magnetically. This does not permit the vented

motor cap option.

HYDRAULIC DATA

Note:

1. Resistance values at 20 °C (68 °F) 10 % tolerance

2. Inductance values are typical to 50 Hz, servo valve pressurized.

Inductance is not normally measured on individual servo valves.

Seal material: FKM

System ﬁltration: High pressure lter (without bypass but with

dirt alarm) mounted in the main ow and if possible directly up-

stream of the valve.

Class of cleanliness: The cleanliness of the hydraulic uid greatly af-

fects the performance (e.g. spool positioning, high resolution) and wear

(e.g. metering edges, pressure gain, leakage) of the servo valves.

Recommended cleanliness class

For functional safety ISO 4406 <17/14/11

For longer service life ISO 4406 <16/13/10

Filter rating recommended

For normal operation b

≥ 75 (10 µm absolute)

For longer life b

≥ 75 (5 µm absolute)

Compatible ﬂuids: Petroleum base or selected phosphate ester

uid, 10 to 97 centistokes at 38 °C (60 to 450 SSU at 100 °F)

HYDRAULIC VALVE SYMBOL

STANDARD COMPONENTS AND DIMENSIONS

OPTIONAL COMPONENTS AND DIMENSIONS

Parallel coils Series coils Single coils

R [Ω] L [H] i

[mA] R [Ω] L [H] i

[mA]

40 0.18 40 160 0.56 20 80 0.22 40

103 0.59 20 412 2.2 10 206 0.72 20

500 2.6 10 2,000 9.7 5 1,000 3.2 10

TECHNICAL DATA

This technical data is based on current available information and is subject to

change at any time by Moog. Specications for specic systems or applications

may vary.

Moog is a registered trademark of Moog Inc. and its subsidiaries. All trademarks

as indicated herein are the property of Moog Inc. and its subsidiaries.

30 Series Servo Valves

SMM/Rev. K, December 2022, Id. CDL45964-en

ORDERING INFORMATION

Moog provides a wide variety of accessories that our customers

may need for hydraulic valve commissioning. A common accessory

is the Moog IN123-825 buffer amplier, a DIN rail mount module

that solves an issue of the input signal being incompatible with the

valve drive requirements. For more information, contact your sales

administrator or visit us online.

SERVO VALVE ACCESSORIES

30 SERIES SERVO VALVE SPARE PARTS

Part name Material Remark Part number

O-rings for

ports P, R, C1

and C2

FKM Quantity 4 required -42082-078

NBR -45122-078

Mounting

Screws

Steel Quantity 4 required,

Torque to 15 in-lbs

NAS1352N06-6

ORDERING CODE

-030

12345678910 11

± 10 mA single coil, 1,000 ohms

± 20 mA single coil, 206 ohms

± 40 mA single coil, 80 ohms

Signals for 100 % spool stroke

Internal

Pilot connections

Mid position

Spool position without electrical signal

Valve connector

Model number (assigned at the factory) Type designation

*Standard motor cap

Vented motor cap

N Magnetic null adjust

Motor cap options

Fluorocarbon (FKM)

Nitrile butadiene (NBR)

Seal material

*01

1.9

0.95

2.8

275

Model designation

Factory identiﬁcation (revision level)

Valve version

Rated ﬂow in l/min (gpm)

Maximum operating pressure in bar (psi)

Bushing/spool design

4-way/axis cut/linear

4-way/±3% overlap/linear

4-way/±10% overlap/linear

4-way/±3% underlap/linear

(4,000)

Low ﬂow, nozzle-ﬂapper

Pilot stage design

For = 35 bar (500 psi) per spool land

(0.5)

(0.25)

(0.75)

Standard response

Assigned at the factory

*Preferred Models

*07

6.9

5.7

(1.8)

(1.5)

*04

3.8 (1.0)

J 310 (4,500)

4-pin MS threaded connector over port A (C1)

4-pin MS threaded connector over port B (C2)

4-lead (18”) pigtail over port B (C2)

4-lead (18”) pigtail over port A (C1)

4-lead (18”) pigtail over pressure

4-lead (18”) pigtail over return

Optional Features

Standard