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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE

PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE
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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 1

SERVO VALVES PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE G771/771 SERIES: ISO 10372-02-02-0-92 G772/772 SERIES: ISO 10372-03-03-0-92 G773/773 SERIES: N06 STANDARD HIGH PERFORMANCE, TWO-STAGE DESIGN PROVIDING FLOW CONTROL IN A SIMPLE AND DEPENDABLE, LONG-LIFE DESIGN WHAT MOVES YOUR WORLD

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 2

Moog G77X/77X Series Flow Control Servo Valves Whenever the highest levels of motion control performance and design flexibility are required, you’ll find Moog expertise at work. Through collaboration, creativity and world-class technological solutions, we help you overcome your toughest engineering obstacles. Enhance your machine’s performance. And help take your thinking further than you ever thought possible. TABLE OF CONTENTS INTRODUCTION Product Overview TECHNICAL DATA Performance Characteristics Dynamic Characteristics Electrical Data Installation Drawings and Null Adjust Instructions...

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 3

Moog G77X/77X Series Flow Control Servo Valves PRODUCT OVERVIEW The G77X/77X Series flow control servo valves are throttle valves for 3 and preferably 4-way applications. They are a high performance, 2-stage design that covers the range of rated flows from 3.8 to 58 l/min (1 to 15 gpm) at 210 bar (3000 psi) valve pressure drop per spool land. The output stage of the valve is a closed center, four-way sliding spool. The pilot stage is a symmetrical double-nozzle and flapper, driven by a double air gap, dry torque motor. Mechanical feedback of spool position is provid d by a e cantilevered...

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 4

Moog G77X/77X Series Flow Control Servo Valves The G77X/77X Series is proven technology that performs reliably in machines where high performance, stability and accuracy are required. Moog’s Mechanical Feedback Valves are designed to provide high reliability and long service life. 2-stage design with dry torque motor Compatibility with many different fluids Low friction, double nozzle pilot stage Symmetrical build provides maximum stability over a variety of conditions High spool control force Stable consistent flows can be achieved, thus increasing accuracies High dynamics Increased...

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 5

Moog G77X/77X Series Flow Control Servo Valves DESCRIPTION OF OPERATION The G77X/77X Series Flow Control Servo Valve consists of a polarized electrical torque motor and two stages of hydraulic power amplification. The motor armature extends into the air gaps of the magnetic flux circuit and is supported in this position by a flexure tube. The flexure tube acts as a seal between the electromagnetic and hydraulic sections of the valve. The 2 motor coils surround the armature, one on each side of the flexure tube. The flapper of the first stage hydraulic amplifier is rigidly attached to the...

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 6

TECHNICAL DATA Moog G77X/77X Series Flow Control Servo Valves G77X/77X SERIES SERVO VALVES General Technical Data Valve design 2-stage, with spool and bushing Pilot valve Nozzle Flapper Mounting surface Installation position Any orientation, fixed or movable Storage temperature range Ambient temperature range Vibration resistance (general) Shock resistance (general) Seal material Fluorocarbon (FKM) 85 SHORE Others upon request Hydraulic Data Maximum operating pressure Ports P, A and B Rated flow at ∆pN 35 bar/spool land (500 psi/spool land) Maximum flow 17 l/min (4.4 gpm) 57 l/min (15 gpm)...

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 7

TECHNICAL DATA Moog G77X/77X Series Flow Control Servo Valves 4, 10 and 19 l/min (1, 2.5 and 5 gpm) Plot 1 & 3 = ±40% rated signal (solid) Plot 2 & 4 = ±100% rated signal (dash) Amplitude Ratio (Decibels) Stroke (% of Rated Signal) 38 l/min (10 gpm) Plot 1 & 3 = ±40% rated signal (solid) Plot 2 & 4 = ±100% rated signal (dash) Amplitude Ratio (Decibels) Stroke (% of Rated Signal) Amplitude Ratio (Decibels) Stroke (% of Rated Signal) G77X/77X SERIES SERVO VALVES -STANDARD RESPONSE SERVO VALVES 57 l/min (15 gpm) Plot 1 & 3 = ±40% rated signal (solid) Plot 2 & 4 = ±100% rated signal (dash)

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 8

TECHNICAL DATA Moog G77X/77X Series Flow Control Servo Valves ELECTRICAL DATA Rated current and coil resistance Coil impedance A variety of coils are available for G77X/77X Series Servo Valves, which offer a wide choice of rated urrents. c The resistance and inductance of standard coils are given below. The 2 coils in each Servo Valve are wound with equal turns giving a normal production tolerance on coil resistance of ±12 %. Copper magnet wire is used, so the coil resistance will vary significantly with temperature. The effects of coil resistance changes can be essentially eliminated...

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 9

TECHNICAL DATA Moog G77X/77X Series Flow Control Servo Valves INSTALLATION DRAWINGS AND NULL ADJUST INSTRUCTIONS 1 Typical Wiring Schematic Typical wiring schematic Location pin (refer to section Hole Pattern for position) Valve mounting holes: 4X Ø 5.61 mm (0.221 in) or Ø 6.73 mm (0.265 in) thru Null adjust screw (requires 3/8” wrench and 3/32” hex key) Connector mates with MS3106F-14S-2S (Moog P/N: 49054F014S002S) Notes: Fluid: Industrial hydraulic fluid per DIN 51524 parts 1 to 3 and ISO 11158, maintained to ISO 4406 Code 17/14/11 recommended Viscosity 10 to 85 mm2/s (cSt) at 38 °C (60...

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 10

TECHNICAL DATA Moog G77X/77X Series Flow Control Servo Valves G77X/77X SERIES HOLE PATTERN FOR MOUNTING SURFACE X F1 Y Recommended Seals G771/771 Port diameter: 4.85 mm (0.191 in) O-ring outside diameter: 9.52 mm (0.375 in) O-ring depth: 1.40 mm (0.055 in) deep G771/771 Port O-rings 1.78 mm (0.070 in) cross section by 6.07 mm (0.239 in) inside diameter. Having compatible compound (universal size -010) Port diameter: 6.60 mm (0.260 in) diameter O-ring outside diameter:12.65 mm (0.498 in) O-ring depth: 1.40 mm (0.055 in) deep Port O-rings 1.78 mm (0.070 in) cross section by 9.24 mm (0.364 in)...

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PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE - 11

Moog G77X/77X Series Flow Control Servo Valves NULL FLOW ADJUSTMENT It is often desirable to adjust the null flow of a servo valve independently of other system parameters. Valves with mechanical null adjustment allow for at least ±10% adjustment of null flow. The mechanical null adjustment is an eccentric bushing retainer pin, located above the tank port designation on the valve body, which if rotated provides control of the bushing location. Mechanical feedback elements position the spool relative to the valve body for a given input signal. Therefore, a movement of the bushing relative to...

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