Moog Servo Proportional Valves

MOOG Servo Valves D661 Series

MOOG D661, D662, D663, D664, D665, perfect performance
MOOG Servo Valves D661 Series
MOOG Servo Valves D661 Series
MOOG Servo Valves D661 Series
MOOG Servo Valves D661 Series




MOOG Model of Servo Valve D661 Series

MOOG D660 Series Valves Catalogue


MOOG Servo-proportional Control Valves D660 Series Description

Heash supply MOOG Servovalves D661, D662, D663, D664, D665 Series. For over 25 years Moog has manufactured proportional control valves with integrated electronics. During this time more than 150,000 valves have been delivered. These proportional control valves have been proven to provide reliable control of including injection and blow molding equipment, die casting machines, presses, heavy industry equipment, paper and lumber processing and other applications.

MOOG D660 Series Servo-proportional flow control valves are throttle valves for 2, 3, 4 and 5-way applications. These MOOG valves are suitable for electrohydraulic position, velocity, pressure or force control systems, including those with high dynamic response requirements.Over time, Moog servo valves have undergone continuous improvements. Moog Servo Jet® pilot stage reduces energy consumption and enhances the valves robustness. This pilot stage uses the jet pipe principle, which has been used reliably with different Moog valves for over 10 years.

We have updated MOOG D660 Series servo-proportional valves with new integrated 24 VDC electronics which improve valve dynamics significantly. The improved MOOG D661, D662, D663, D664, D665 Series is designed to enhance the stability and performance of the valves in a wider variety of applications, increase the number of signal options and improve the fail-safe functionality of an application. We have also redesigned the valve’s ServoJet® pilot stage, reducing hysteresis and null shift and improving pressure gain. Also, the updated ServoJet® pilot stage now has the ability to operate at a plus or minus 150 mA rated signal.The new integrated electronics improve valve dynamics by up to 30 percent and now have a 24 VDC supply voltage, as well as 4 to 20 mA spool position output as options.

Changes in the D660 Series (MOOG D661, D662, D663, D664, D665) allow the 90° phase lag frequency response characteristic for small signals (10% amplitude) to increase from 78 Hz to 90 Hz in the D661 Series.

Other improvements in the D660 Series address many safety considerations in die-casting machines, injection-molding machines and presses. These include:

--The valve now places an enable signal at the operator’s disposal. If no enabled signal is available, the spool in the second stage moves to a predefined position (hydraulic zero or end position) depending on valve variant.

--The valve monitors supply voltage. If voltage on the updated valve (18 V up to 32 V) should drop below 18 V, the end position will be disconnected and the spool will move to its predefined

position (fail-safe). It will be monitored as soon as it reaches this position and will be confirmed by a logic output.

--The logic outputs are short circuit protected. Maximum continuous voltage is 32 V with surge pulses up to 500 V and burst of 4 kV (per EMC standard).

MOOG D661 High response Series, Two stage servo valves. The flow control servo proportional valves D661 are throttle valves for 2-, 3- and 4-way applications. These valves are suitable for electrohydraulic position, velocity, pressure or force control systems including those with high dynamic response requirements. Like as D661-4444C, D661-4446C, D661-4598C, D661-4469C, D661-4341C, D661-6428E, D661-6490C, D661-4577C, D661-4081 ......and we also provide MOOG D662, D663, D664, D665 Series to meet with customers’ demand.

MOOG Pilot-Operated Servovalves D661 Series Technical Data

- 2-stage valve with robust ServoJet® pilot valve

- Optimized design of valve bodies for high rated flow

- Improved ServoJet® pilot valve design results in excellent dynamic response

- Different fail-safe options available allow the best fit to the application


Moog D661 Valve Hydraulic Data

Rated Flow: 20 to 200 l/min (5.3 to 53 gpm) @ ∆p 35 bar (500 psi) per land

Maximum Flow: 250 l/min (65 gpm) ISO size 05 (second T-port connected)

Maximum Operating Pressure: 350 bar (5,000 psi)

Mounting Pattern: ISO 4401 Size 05

100% Step Response: 6.5 to 14 ms @ 210 bar (3,000 psi)


Moog D661 Valve Electrical Data

Supply Voltage : 24 VDC (18 to 32 VDC)

Rated Signal Options: +/-10 V, +/-10 mA, 4-20 mA

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