Moog D668 Series User Manual
  1. Manuals
  2. Brands
  3. Moog Manuals
  4. Control Unit
  5. D668 Series
  6. User manual

Moog D668 Series User Manual

Servomotor-driven proportinal valve
Hide thumbs Also See for D668 Series:
Table of Contents

Advertisement

Quick Links

Download this manual
USER MANUAL FOR
SERVOMOTOR-DRIVEN
PROPORTINAL VALVE
DIRECT OPERATED
D668 SERIES
ISO 4401 SIZE 07
FOR DEMANDING APPLICATIONS REQUIRING
HIGH DYNAMIC RESPONSE OF HYDRAULIC
ACTUATION
WHAT MOVES YOUR WORLD
Rev. 1, May 2021

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the D668 Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Moog D668 Series

Summary of Contents for Moog D668 Series

  • Page 1 USER MANUAL FOR SERVOMOTOR-DRIVEN PROPORTINAL VALVE DIRECT OPERATED D668 SERIES ISO 4401 SIZE 07 Rev. 1, May 2021 FOR DEMANDING APPLICATIONS REQUIRING HIGH DYNAMIC RESPONSE OF HYDRAULIC ACTUATION WHAT MOVES YOUR WORLD...
  • Page 2 Completeness Copyright This document is complete only when used in conjunction © 2021 Moog GmbH with the product-related hardware and software Hanns-Klemm-Straße 28 documentation required for the relevant application, as for 71034 Böblingen example operating instructions of the valve and other Deutschland manuals.

  • Page 3: Table Of Contents

    Internal lubrication via T-port ................. 28 3.1.3.2. External lubrication via X-port ................28 3.1.4. MSD Servo Drive ......................29 3.1.5. Signal interfaces ......................29 3.1.5.1. Power connector ....................29 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 4 ................... 51 RIVE DMINISTRATOR 7.2. Block diagram ........................52 7.3. Arrangement of connectors ....................52 7.4. Power connector ........................53 7.4.1. Pin assignment of power connector ................53 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 5 Maintenance .......................... 80 10.2.1. Checking and replacing the port O-rings ............... 81 10.2.1.1. Tools and materials required ................. 81 10.2.1.2. Checking and replacing the O-Rings ..............81 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 6 Quoted standards ........................ 106 14.3.1. DIN ..........................106 14.3.2. EN ..........................106 14.3.3. EN ISO ......................... 107 14.3.4. IEC ..........................108 14.3.5. ISO ..........................108 14.3.6. Quoted directives ......................108 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 7: General Information

    Chap. "2.1 Handling in accordance with safety requirements", page 17 Special models of the valves custom-made for specific customers, are not explained in this user manual. Please contact Moog or one of its authorized service centers for information on these special models.

  • Page 8: Storage Location

    Identifies steps in a procedure that must be performed in consecutive order ‘…’ Identifies parameters for valve software (e.g.: 'Node ID') or the valve status (e.g.: 'ACTIVE') © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 9: Structure Of The Warning Notes

     Chap. "12 Accessories, Spare parts and Tools", page 101 The PDF files of the supplemental documents can be downloaded from the following link: https://www.moog.com/literature-search.html © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 10: Intended Operation

    Observation of all the latest versions of the national and international regulations, standards, and guidelines relevant to the application concerned (for example, the EU Machinery Directive, and the regulations of the trade association, TÜV, and VDE) © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 11: Selection And Qualification Of Personnel

    (EN 50110-1).  Chap. "1.8 Warranty and liability", page 15 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 12: Structural Modifications

    / indications (e.g. with mains voltage applied to MSD Servo Drive terminal X11 and missing control supply +24 V on X9 / X10 and X44)! ► Structural modifications of the valves or to accessories may only be made by MOOG GmbH or by an authorized MOOG service center.

  • Page 13: Environmental Protection

    The valve contains among others the following materials: • Electronic components • Adhesives and casting compounds • Parts with electro-plated surfaces • Permanent-magnet materials • Hydraulic fluid • Assorted metals and plastics © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 14: Responsibilities

    Handy and accessible storage of this user manual and of the product-related hardware and software documentation relevant to the particular application  Chap. "1.1.3 Storage location", page 8 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 15: Warranty And Liability

    Use of unsuitable or defective accessories or of unsuitable or defective spare parts  Chap. "12 Accessories, Spare parts and Tools", page 101 • Catastrophes caused by foreign objects or force majeure © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 16: Registered Marks And Trademarks

    1.9. Registered marks and trademarks Moog and Moog Global Support® are registered trademarks of Moog Inc. and its subsidiaries. Microsoft® and Windows® are either registered trademarks or trademarks of the Microsoft® Corporation in the USA and / or other countries.

  • Page 17: Safety

    Chap. "2.3.1 Electrical hazards", page 20 Observing the safety instructions and the safety and accident prevention regulations, standards and guidelines will help to prevent accidents, malfunctions and damage to property! © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 18: Occupational Safety And Health

    WARNING Danger of injury due to falling objects! Falling objects, such as valves, tools, or accessories, can cause injury. ► Wear appropriate safety clothing, e.g. safety shoes. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 19 Hazardous operating fluids! When working with hazardous operating fluids, any skin contact or inhalation may cause personal injury. ► Wear suitable safety equipment, e. g., work gloves. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 20: General Safety Instructions

    Risk of damage! Electrical discharges can damage internal device components. ► Protect the valve, accessories and spare parts against static charging. In particular, avoid touching the connector contacts. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 21: Installation And Operation In Safety Oriented Systems

    Disconnect the mains − Secure against reconnection − Verify that the system is dead − Carry out earthing and short circuiting − Provide protection from adjacent live parts © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 22: Pressure Limitation

    Maximum operating pressure:  Chap. "11.3.2 Data D668 – ISO 4401-07 / NG16", page 95 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 23: Product Description

    3.1. Function and mode of operation The D668 series valves are direct drive proportional valves. The spool is actuated directly by a brushless servomotor. A rotary-linear converter transforms the rotary motor motion into the linear spool motion. The valves are throttle valves for 2-, 3-, 4-, 5- or even 2x2-way applications.

  • Page 24: Representative Depiction Of The Valve

    Mounting pattern D668 (NG16) series  Figure 20  Chap. "3.3.1 Spool position control", page 32 Encoder  Chap. "3.1.3 Lubrication of the rotary-linear Rotary-linear converter converter", page 28 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 25: Servomotor

    The motor has an 8-pole electromagnetic design, a stator with nonsymmetric slot count and other proprietary features to minimize cogging. The stator has an integrated PTC-temperature sensor (KTY, temperature range -40 to +300 °C (-40 to +572 °F)). © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 26: Liquid Cooling

    < 0,15 ppm Organic parts < 2 ppm Large solid parts None Free carbon dioxide < 3 ppm Iron (Fe) < 0,2 ppm Oils Total alkalinity < 600 ppm © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 27 / or deposit removers has to be subjected to preventive verification of compatibility with the materials of the housings (aluminum and its alloys), with the materials of the gaskets (Viton) and with all the components of the circuit. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 28: Lubrication Of The Rotary-Linear Converter

    The X-port flow must be limited via orifices in order to keep the pressure in the housing of the rotary- linear converter below 10 bar (145 psi). • The lubricating flow is drained to Y-port. The Y-port must be pressureless. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 29: Msd Servo Drive

    3.1.5.2. Signal connector The encoder connector from the servomotor is connected to the MSD Servo Drive (encoder signals to terminal X7, PTC-temperature sensor (KTY) signals to terminal X6). © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 30: Safety Function / Fail-Safe

    NOTICE Risk of damage! The D668 series valves do not have a built in mechanical safety function. There is no mechanism like a spring, which moves the valve spool to a defined (safe) position in a failure state / de-energized state of the SDPV.

  • Page 31: Restarting The Valve

    Check if MSD Servo Drive is enabled (state 5) by the higher-level PLC. • Further details can be found in the MSD Servo Drive literature.  Table 21, page 102 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 32: Hydraulics

    (e.g., correction of the zero position). The parameters can be set or interrogated via the USB or Ethernet (TCP / IP) interface in the MSD Servo Drive software. Setting and interrogation can be performed for example with the Moog software.

  • Page 33: Valve Configurations And Hydraulic Symbols

     Chap. “3.1.1 Representative depiction of the valve”, page 24 3.3.2.2. Leakage port Y The leakage connection Y must be used for all D668 series valves. It must be used to drain the lubrication flow from the rotary-linear converter to a pressureless drain line.

  • Page 34: Electrical And Hydraulic Zero Positions

    Servo Drive and not in the SDPV. A valve with a false zero adjustment may cause damages on the machine. The correct zero adjustment for each individual valve is determined on the test stand at Moog and stored in the device commissioning file. ► The correct zero adjustment (device commissioning file) must be uploaded to the corresponding MSD Servo Drive before starting up the valve.

  • Page 35: Control

    The signal type identification, i.e. the 10th position on the valve nameplate is used for identification for Moog internal test purposes (+/-10 V command, +/-10 V feedback signal on the MSD Servo Drive). The signal type for the MSD Servo Drive depends on the version / ordering number of the servo drive (type G392-020, size 3 must be used).

  • Page 36: Spool Position Control Command Inputs On Msd Servo Drive

    If there is no differential command input source available, the reference point of the command inputs must be connected to 0 V of the command input source (GND). The operating direction of the command signal can be altered by modifying the parameters of the Moog software.

  • Page 37: Analog Actual Value Output On Msd Servo Drive

    / diagnostic signals back to the PLC. Further details can be found in the MSD Servo Drive literature.  Table 21, page 102 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 38: Configuration Software

    Graphic representation of status information, command signals and actual values • Recording and visualization of the system parameters with the integrated data logger and the integrated oscilloscope function © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 39: Nameplate

    Product description The Moog D software is available as an accessory. RIVE DMINISTRATOR  Chap. "12.1 Accessories for D668 series valves", page 101  https://www.moogsoftwaredownload.com/msd.html Further details can be found in the Moog D software literature. RIVE DMINISTRATOR  Table 21, page 102 3.7.

  • Page 40: Characteristic Curves

    [l/min (gpm)]: Rated flow Δp [bar (psi)]: Actual pressure difference per control land Δp Rated pressure difference Δp [bar (psi)]: = 5 bar (72.5 psi) per control land © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 41: Flow Signal Characteristic Curve

    = 10 bar Figure 8: Flow signal characteristic curve with equal Figure 9: Test setup for measuring the flow signal electrical and hydraulic zero positions characteristic curve © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 42: Transportation And Storage

    ► The shipping plate and the associated attachment elements (screws and nuts) must be kept for later use, e.g. during transportation. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 43 The liquid cooling of the motor may get damaged due to frozen water during transport or storage. ► Discharge the liquid cooling before transport or storage, e.g. by blowing out the liquid by compressed air. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 44: Checking / Unpacking A Delivery

    5 years, be inspected by us or one of our authorized service centers. Further details see TN516, Storage recommendations for valves, spare parts and accessories  Table 21, page 102 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 45: Mounting And Connection To The Hydraulic System

     Chap. "2.2 Occupational safety and health", page 18 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 46: Dimensions (Installation Drawing)

    The wrench sizes of the hexagon socket cap head screws for mounting are series-specific. Details about the screws and their tightening torque:  Table 3, page 47 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 47: Specification For Installation Screws For The Valves

    ► On units that are moved in jerks and jolts, the movement direction of the spool should not be the same as the movement direction of the unit.  Chap. "11.3.2 Data D668 – ISO 4401-07 / NG16", page 95 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 48 5. Secure the valve. To do so, tighten the installation screws (hexagon socket head cap screws) free from distortion in diagonal sequence. Tightening torque:  Table 3, page 47 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 49: Electrical Connection

    ► On touching there is a risk of burns to the skin. For this reason provide protection against touching. ► During mounting maintain an appropriate distance to neighbouring assemblies. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 50 The MSD Servo Drive described here must be operated with external fuse protection. The information about the external fuse protection can be found in the operation manual of the MSD Servo Drive.  Table 21, page 102 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 51: Protective Grounding And Electrical Shielding

    RIVE DMINISTRATOR thus corresponding risks to people and equipment. ► Further details see manual Moog D RIVE DMINISTRATOR  Table 21, page 102 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 52: Block Diagram

    * Depending on MSD Servo Drive version, depicted with CANopen fieldbus and analog feedback 7.3. Arrangement of connectors 64 (2.52) Signal connector Power connector 73 (2.87) Figure 11: Arrangement of connectors on the servomotor of the SDPV © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 53: Power Connector

    7.4.2. Mating connector for power connector The mating connector for the 6-pin power connector is available as an accessory.  Chap. "12.1 Accessories for D668 series valves", page 101 7.4.2.1. Permissible motor cable lengths Details for permissible motor cable lengths can be found in the operation manual of the MSD Servo Drive.

  • Page 54: Signal Connector

    7.5.2. Mating connector for signal connector The mating connector for the 17-pin signal connector is available as an accessory.  Chap. "12.1 Accessories for D668 series valves", page 101 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 55: General Notes On Wiring

    The above-mentioned connectors, cables and tools are not included in the valve scope of delivery. They are supplied separately.  Chap. "12.1 Accessories for D668 series valves", page 101 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 56: Procedure

    It is recommended to shield the power and signal cables. The shielding should be connected to earth at both ends. For details regarding protective grounding and shielding, please refer also to the operation manual of the MSD Servo Drive.  Table 21, page 102 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 57: Equipotential Bonding And Protective Grounding

    Shield connected Equipotential bonding conductor to signal plug Machine Figure 15: Equipotential bonding and protective grounding of machines (see also EN 60204-1) and electrical shielding of the SDPV © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 58: General Principles

    To connect the servomotor we recommend our ready made motor cables  Chap. "12.1 Accessories for D668 series valves", page 101 All earthed points and components must be routed directly to the central earthing point (e.g. PE rail, main earth) with as low an impedance as possible and with good conductivity.

  • Page 59: Electrical Shielding

    When connecting the shielding, we recommend to use cables / connectors listed in this manual.  Chap. "12.1 Accessories for D668 series valves", page 101 Connection on the valve side Connect the cable shield conductively to the metal shell of the connector.

  • Page 60: Electromagnetic Compatibility (Emc)

    The following technical requirements must be in place so that the EMC protection requirements can be satisfied: • Use of the mating connectors recommended for the valves.  Chap. "12.1 Accessories for D668 series valves", page 101 • Adequate shielding. •...

  • Page 61: Communication Via The Moog Drive Administrator

    (in the event that the mains voltage or the switching frequency has been changed). For further details, please refer also to the program help of the Moog D software. RIVE DMINISTRATOR ...

  • Page 62: Start Up

    If possible, remove the main fuse from the machine. ► Make sure that the machine is completely depressurized. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 63 Servo Drive and not in the SDPV. A valve with a false zero adjustment may cause damages on the machine. The correct zero adjustment for each individual valve is determined on the test stand at Moog and stored in the device commissioning file. ► The correct zero adjustment (device commissioning file) must be uploaded to the corresponding MSD Servo Drive before starting up the valve.

  • Page 64: Preparations

    The valves and all the other installed components are in a technically fault-free and operationally reliable state. • No signals that can lead to uncontrolled movements in the machine are transmitted to the valves.  Chap. "1.3 Intended operation", page 10 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 65: Start-Up Of The Valves

    USB or Ethernet (TCP / IP) interface in the MSD Servo Drive software. Setting and interrogation can be performed for example with the Moog D RIVE DMINISTRATOR software. For further details, please refer also to the program help of the Moog D RIVE DMINISTRATOR software.  Table 21, page 102 ©...

  • Page 66: Configuration Of The Valves / Msd Servo Drives

    Danger of personal injury and damage to property! The selected settings must be documented after the configuration of the valves / MSD Servo Drives has been altered. The settings can be documented for example with the Moog D RIVE DMINISTRATOR software.

  • Page 67: Device Commissioning File

    Start up 8.3.2. Device commissioning file The zero adjustment of each individual valve is determined on the test stand at Moog. The zero adjustment (electric and hydraulic zero position), the controller adjustment and the firmware is stored in the device commissioning file. The device commissioning file must be uploaded to the corresponding MSD Servo Drive, which operates the SDPV.

  • Page 68: Upload Of The Device Commissioning File To The Msd Servo Drive

    Further details regarding the Moog D software, see: RIVE DMINISTRATOR  Chap. "3.6 Moog D software", page 38 RIVE DMINISTRATOR Upload with the Drive Loader software: 1. Open the Drive Loader software © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 69: Adapting / Storing Of The Parameters

    MSD Servo Drive. Upload with the Moog D software: RIVE DMINISTRATOR A detailed description how to upload the device commissioning file (*comfarc) with the Moog software can be found in the program help: RIVE DMINISTRATOR  Table 21, page 102 8.3.3.

  • Page 70: Filling And Flushing The Hydraulic System

    The flushing plates are not included in the valve scope of delivery. They are available as an accessory.  Chap. "12.1 Accessories for D668 series valves", page 101 6. Carefully flush the hydraulic system in accordance with the instructions of the manufacturer and the operator of the machine.

  • Page 71: Start-Up Of The Hydraulic System

    ► In order to avoid diesel effects, the hydraulic system must be ventilated. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 72: Operation

     Chap. "2.2 Occupational safety and health", page 18 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 73 At high duty cycles (high valve spool amplitudes and frequencies) the temperature of the servomotor increases and can be thermally destroyed. ► Use the liquid cooling at high duty cycles ► Monitor the temperature of the servomotor © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 74: Preparations For Operation

    MSD Servo Drive.  Table 21, page 102 Information on maintenance:  Chap. "10.2 Maintenance", page 80 Information on correcting possible faults:  Chap. "10.3 Troubleshooting", page 81 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 75: Shutting Down The Valve

    NOTICE Risk of damage! The D668 series valves do not have a built in mechanical safety function. There is no mechanism like a spring, which moves the valve spool to a defined (safe) position in a failure state / de-energized state of the SDPV.
  • Page 76  Chap. "3.2 Safety function / fail-safe", page 30 If necessary, the valve must be restarted after it has been shut down.  Chap. "3.2.2 Restarting the valve", page 31 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 77: Service

    If possible, remove the main fuse from the machine. ► Make sure that the machine is completely depressurized. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 78 ► Warranty and liability claims for personal injury and damage to property are excluded among other things if they are caused by unauthorized repairs or other unauthorized interventions.  Chap. "1.8 Warranty and liability", page 15 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 79: Removing The Valves

     Table 3, page 47 Details about the installation screws for the transport plates and their tightening torque:  Chap. "12 Accessories, Spare parts and Tools", page 101 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 80: Removing

    5 years, be inspected by us or one of our authorized service centers. If the valve is exposed to high loads, it may be necessary to reduce the check / inspection interval to suit the application. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 81: Checking And Replacing The Port O-Rings

     Chap. "10.3.4 Instability of the internal valve control loops", page 84 If the fault cannot be corrected by means of the measures set out below, please contact us or one of our authorized service centers. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 82: Leaks

    Check whether the hydraulic installation is correct and whether all the hydraulic ports are correctly established. • Check whether hydraulic pressure is present. • Check whether the supply voltage is present. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 83: Instability Of The External Control Loop

    Check whether the internal valve control loops are stable.  Chap. "10.3.4 Instability of the internal valve control loops", page 84 • Check whether the controlled system was modified. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 84: Instability Of The Internal Valve Control Loops

    Servo Drive and not in the SDPV. A valve with a false zero adjustment may cause damages on the machine. The correct zero adjustment for each individual valve is determined on the test stand at Moog and stored in the device commissioning file. ► The correct zero adjustment (device commissioning file) must be uploaded to the corresponding MSD Servo Drive before starting up the valve.
  • Page 85 Use of our flexible corrective maintenance program according to your service requirements Our service offerings: • Repair with original parts by trained technicians according to the latest Moog specifications • Provision of original spare parts and products in order to avoid unplanned downtimes •...

  • Page 86: Technical Data

    Dimensions of the connector connectors", page 52 Technical data D668 – ISO 4401-07 / NG16  Chap. "11.3 Technical data D668 – ISO 4401-07 / NG16", page 94 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 87: Nameplates

    Optical version identification Date of manufacture in MM / YY format Hydraulic symbol  Data matrix code Chap. "11.1.2 Data matrix code", page 93 Designation of ports © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 88 Chap. "11.3.2 Data D668 – ISO 4401-07 / NG16", page 95 Conformity certificate will be supplied on request Insul 155 Moog insulation class 155 Date of manufacture in MM / YY format Serial number © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 89: Model Number And Type Designation

    = 5 bar (72.5 psi) per control land: tolerance ±10 %) Table 6: Rated flow variant in the type designation Variant Rated flow 150 l/min (40 gpm) © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 90 The 5th digit of the valve's type designation provides information about which servomotor version is integrated into the valve. Table 9: Servomotor variant in the type designation Variant Servomotor Type G403, size L60 with liquid cooling © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 91 ●● ● ● ● ● ● ● ● ● ● ● The 9th digit of the valve's type designation specifies the version of the electrical valve connectors. © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 92 The signal type identification, i.e. the 10th position on the valve nameplate is used for identification for Moog internal test purposes (+/-10 V command, +/-10 V feedback signal on the MSD Servo Drive). The signal type for the MSD Servo Drive depends on the version / ordering number of the Servo Drive (type G392-020, size 3 must be used).

  • Page 93: Data Matrix Code

    Chap. "12 Accessories, Spare parts and Tools", page 101 • Adequate shielding • Implementation of equipotential bonding system, protective grounding, and electrical shielding.  Chap. "7.7.2 Equipotential bonding and protective grounding", page 57 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 94: Technical Data D668 - Iso 4401-07 / Ng16

    The holes (Figure 20) apply for the Servomotor-Driven Proportional Valves in the D668 series. Figure 20: Mounting pattern of mounting surface according to ISO 4401-07-07-0-05 Table 18: Holes in the mounting surface for D668 series (dimensions in mm and (in)) Designation Size Ø...

  • Page 95: Data D668 - Iso 4401-07 / Ng16

    1,075 Hz Threshold < 0.1 % Hysteresis < 0.25 % Null shift at ΔT = 10 K 0.2 % Sample deviation of rated flow Q +/-10 % © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 96 (e.g. pressure gain, leak losses) Measured at 14 bar (200 psi), ports A and B blocked, fluid viscosity of 32 mm /s (cSt) and oil temperature of +40 °C (+104 °F) © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 97: Dimensions (Installation Drawing)

     Figure 18, page 87 Valve name plate  Figure 19, page 88 Motor name plate Installation space of plug connector when mounted:  Chap. "7.3 Arrangement of connectors", page 52 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 98: Valve Configurations And Hydraulic Symbols

    Valve configurations and hydraulic symbols 4-way version 4-way version With internal lubrication via pre-loaded With external lubrication via X, lubrication T-line, lubrication drain via external Y drain via external Y © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 99: Characteristic Curves

    Spool A: 1.5 to 3 % positive overlap, linear flow characteristic Spool D: 10 % positive overlap, linear flow characteristic Figure 22: Valve D668, flow-signal characteristic curve © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 100 = 14 bar (200 psi), ports A and B blocked. Figure 23: Step response for D668 valves +/-10 %, 25 % +/-90 % Figure 24: Frequency response for D668 valves © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 101: Accessories, Spare Parts And Tools

    22 to 14) Mating connector for signal connector (motor) 17-pole, straight version, for cable C08666-001 cross section 0.24 to 1 mm² (AWG 24 to 18) Flushing plate -76741 © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 102 TN516, Storage recommendations for valves, CA78907-001 spare parts and accessories Documents can be found and downloaded by specifying the item number: German and English-language documents at http://www.moog.com/industrial/literature or directly at https://www.moogsoftwaredownload.com/msd.html © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 103: Ordering Information

    If the enable signal is low: The servomotor is de-energized. The spool moves to an undefined position. System pressure for A, B, P and T vary from maximum X and Y pressure Depends on MSD Servo Drive (type G392-020, size 3) © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 104: Appendix

    TCP / IP Transmission Control Protocol / Internet Protocol Technical note TÜV Technischer Überwachungsverein Underwriters Laboratories Inc. Universal Serial Bus Ultraviolet Verband der Elektrotechnik Width Across Flats © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 105: Additional Literature

    Verlag Moderne Industrie 14.2.2. Moog publications Press releases: http://www.moog.com/industrial/news Newsletters: http://www.moog.com/industrial/newsletter Articles in technical journals: http://www.moog.com/industrial/articles Presentations and scientific publications: http://www.moog.com/industrial/papers User manuals, TNs, catalogs, and similar: http://www.moog.com/industrial/literature © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 106: Quoted Standards

    Environmental tests – Part 2: Tests; test-Ea and guidelines: shocks (IEC 60068-2-27:1987) EN 60204-1 Safety of machinery – Electrical equipment of machines EN 60034-1 Rotating electrical machines – Part 1: Rating and performance © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 107: Iso

    Safety of machinery – Safety-related parts of control systems – Part 1: General design principles EN ISO 13849 Safety of machinery – Safety-related parts of control systems © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)

  • Page 108: Iec

    Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits © Moog GmbH User manual Servomotor-Driven Proportional Valve D668 series (CDS37389-en; Rev. 1)
  • Page 109 MORE PRODUCTS. MORE SUPPORT. Moog designs a range of motion control products to complement those featured in this document. Moog also provides service and support for all of our products. For more information, contact the Moog facility closest to you.

Table of Contents