MOOG 31 Series Servo Valves

A high response, high efficiency valve in a compact package

The 31 Series is a two-stage, flow control, double-nozzle, mechanical

feedback servo valve that has a stainless steel body and integrated

torque motor in an environmentally sealed compartment.

Its nozzle-flapper design is a proven technology for applications where

high response, stability and accuracy are required in a compact package.

As the higher flow counterpart to the 30 series it has an impressive

power density of nearly 0.75 horsepower per oz.

equivalent, or 9.3 horsepower overall. Many options are available for this

series, including vented and non-vented motor caps, pigtail versions for

convenient installation, tie wire options and special connectors.

The 31 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, and / or be where they are exposed to high

shock and vibration. This product is part of our micro hydraulic offering

which delivers high power to weight ratio and high efficiency.

It achieves this all while providing high dynamics and precise flow control

for better overall system control.

Features:

• 2-stage flow control Mechanical Feedback Servo Valve

• Low friction double nozzle pilot stage for high resolution and low hysteresis

• Rugged construction designed for extreme conditions (High shock, vibration

or pressure)

• Ultra-Compact, light weight package

• High response for improved control capability

• Stainless steel body and integrated torque motor in an environmentally

sealed compartment

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 flow

independent of other system

parameters allows for adjustment

in the field

APPLICATIONS

• Remotely operated vehicle

• Automated guided vehicle

• Animatronics

• Manipulators

• Downhole tools

• Entertainment