72 Series Servovalves ISO 10372-06-05-0-92 - kostek

1 72 series servovalves ISO 10372-06-05-0-92 . 72 Series . TWO STAGE Servovalves . 72 series servovalves cantilever valve deflection of armature/flapper assembly. Once the restoring design is simple and rugged for assembly within the flexure torque becomes equal to the The 72 Series flow control dependable, long life operation. tube. Deflection of the flapper torque from the magnetic Servovalves are throttle valves restricts fluid flow through one forces, the armature/flapper for 3 and preferably 4-way These valves are suitable for nozzle which is carried through assembly moves back to the are a high electrohydraulic position, to one spool end, displacing neutral position, and the spool performance, two-stage design speed, pressure or force con- the spool.

2 Is held open in a state of equi- that covers the range of rated trol systems with high dynamic librium until the command sig- flows from 25 to 60 gpm at response requirements. Movement of the spool opens nal changes to a new level. 1000 psi valve output the supply pressure port (P) to stage is a closed center, four- Principle of operation one control port, while simul- In summary, the spool position way sliding pilot An electrical command signal taneously opening the tank is proportional to the input stage is a symmetrical double- (flow rate set point) is applied port (T) to the other control current and with constant nozzel and flapper, driven by to the torque motor coils, and spool motion also pressure drop across the valve, a double air gap, dry torque creates a magnetic force which applies a force to the cantilever flow to the load is proportional motor.

3 Mechanical feedback of acts on the ends of the pilot spring, creating a restoring to the spool position. spool position is provided by a stage causes a torque on the armature/flapper VALVE FEATURES. 2-stage design with dry torque motor Rugged, long-life design Low friction double nozzle pilot stage High resolution, low hysteresis High spool control forces Completely set-up at the factory High dynamics Optional fifth port for separate pilot supply Field replaceable pilot stage filter The actual flow is dependent p upon electrical command signal Q = QN. pN. and valve pressure flow for a given valve pressure drop can be calculated using Q [gpm] = calculated flow the square root function for QN [gpm] = rated flow sharp edge orifices: p [psi] = actual valve pressure drop pN [psi] = rated valve pressure drop This catalog is for users with technical to check the suitability of the ensure that all necessary products described here.

4 In case characteristics for function and safety of doubt, please contact Moog Inc. of the system are given, the user has 2. 72 Series . GENERAL TECHNICAL DATA. Operating Pressure ports P, X,A and B up to 3,000 psi* 1000. port T up to 3,000 psi Temperature Range Fluid -40 F to 275 F. Ambient -40 F to 275 F. Seal Material Viton, others on request Operating Fluid Compatible with common hydraulic fluids, other fluids on request. 100. Recommended viscosity 60-450 SUS @ 100 F 60. System Filtration: High pressure filter (without bypass, but with dirt alarm) mounted in the main flow and if possible, 40. directly upstream of the valve. 25. Class of Cleanliness: The cleanliness of the hydraulic fluid greatly effects the performance (spool positioning, high resolution).

5 And wear (metering edges, pressure gain, leakage) of the servovalve. Recommended Cleanliness Class 10. For normal operation ISO 4406 < 14/11. For longer life ISO 4406 < 13/10. Filter Rating recommended For normal operation 10 75 (10 m absolute). For longer life 5 75 (5 m absolute). Installation Operations Any position, fixed or moveable. Vibration 30 g, 3 axes Weight lb. ( kg). 1. Shipping Plate Delivered with an oil sealed 100 1000 10000. shipping plate. * Maximum special order is 5,000 psi Valve Flow Diagram Valve flow for maximum valve opening (100% command signal) as a function of the valve pressure drop. P B T A P. 3. 72 Series . TECHNICAL DATA. Model ..Type 72 .. Mounting Pattern ISO 10372 - 05 - 05 - 0 -92.

6 Valve Body Version 4-way 2-stage with spool-bushing assembly Pilot Stage Nozzle/Flapper, High flow Pilot Connection Optional Internal or External Rated Flow ( 10%) at pN = 1,000 psi [gpm] 25 40 60. Response Time* [ms] 16 26 40. Threshold* [%] < Hysteresis* [%] < Null Shift at T = 100 F [%] < Null Leakage Flow* max. [gpm] to * Measured at 1,000 psi pilot or operating pressure Typical characteristic curves with 40% and 100%. input signal, measured at 3,000. pilot or operating pressure. Standard Valves +2 +2 +2. Amplitude Ratio (dB). Amplitude Ratio (dB). Amplitude Ratio (dB). 0 0 0. -2 -2 -2. -4 -4 -4. 3000 psi DTE-24. -6 -6 -6 at 100 F (38 C). 3000 psi DTE-24 3000 psi DTE-24 Rated Current: at 100 F (38 C) at 100 F (38 C) 40%.

7 -8 Rated Current: 100 -8 Rated Current: 100 -8 100. 100%. 40% 40%. Phase Lag (degrees). Phase Lag (degrees). Phase Lag (degrees). -10 100% 80 -10 100% 80 -10 80. 60 60 60. 40 40 40. 20 20 20. 0 0 0. 7 10 15 20 30 50 70 100 150 200 7 10 15 20 30 50 70 100 150 200 7 10 15 20 30 50 70 100 150 200. Frequency (Hz) Frequency (Hz) Frequency (Hz). Frequency Response Frequency Response Frequency Response of 25 gpm Servovalves of 40 gpm Servovalves of 60 gpm Servovalves 4. 72 Series . INSTALLATION DRAWINGS. MAX. [ ]. [ ] [ ]. 4 MOUNTING HOLES .406 [ ] THRU [ ]. [ ] [ ] [ ]. [ ]. [ ]. FIELD REPLACEABLE. FIRST STAGE FILTER .86 [ ] [ ]. [ ]. PIN D PIN A. OPTIONAL [ ]. PIN C PIN B MAGNETIC NULL ADJUST [ ].

8 MECHANICAL. NULL ADJUST. [ ] [ ]. [ ] [ ]. [ ] DIA TYP. MAX [ ]. [ ]. P. LOCATING PIN .28 .25 [ ] [ ] [ ]. TYPICAL SUBPLATE MANIFOLD Null Adjust: Flow out of Control Port B will increase with clockwise rotation of null adjust screw 4X .375-16 UNC-2B THD. (3/32 hex key). RETURN PORT T..013 M. 4X .406 THRU..609 .60 .014 M The mounting manifold CONTROL PORT A. must conform to ISO 10372-06-05-0-92 . Surface to which valve is mounted requires a [ ]. 32. ( )..750. ( ) finish, flat within [ ] TIR..39 .30. 2..014 M. CONTROL PORT B .750. VALVE MOUNTS. 4X .688 ON THIS MANIFOLD. ( )..014 M SURFACE..250 AUXILIARY PILOT (73) PRESSURE PORT P. PORT PER SAE J1926..4375-20 UNF-2B PRESSURE PORT X. DASH 4 STR THD O-RING.

9 014 M 32. BOSS (.25 TUBE OD REF) .002. 4X PORT PER SAE J1926 UN-2B 4 PL. DASH 20 STR THD O-RING. BOSS ( TUBE OD REF). P. 5. 72 Series . ELECTRICAL CONNECTIONS. Rated current and Coil connections Servoamplifier coil resistance A four-pin electrical The servovalve responds A variety of coils are available connector (that mates to input current, therefore for 72 series servovalves , with an MS3106F14S-2S) a servoamplifier that has which offer a wide choice of is standard. All four torque high internal impedance rated current. See Table I. motor leads are available (as obtained with current at the connector so external feedback) should be used. connections can be made for This will reduce the effects Series , parallel or differential of coil inductance and will operation.

10 Minimize changes due to 72 series servovalves coil resistance variations. can be supplied on special order with other connectors. ELECTRICAL Parallel Series Single CONNECTIONS. (Examples with typical 72 Series coils) A B C D A B C D. A B C D. Coil Resistance [ ] 100 400 200. Rated Current [mA] 15 15. Electrical Power [W] .023 .023 .045. Connections for Valve Opening A and C (+) A (+), D (-) A (+), B (-). P B, A T B and D (-) B and C connected or C (+), D (-). Note: Before applying electrical signals, the pilot stage has to be pressurized. TABLE 1. Nominal Recommended Rated Current mA Approximate Coil Inductance* Henrys Resistance Parallel, Per Coil at Differential or Single Series Coils Single Coils Series Coils Parallel Coils 77 F (25 C) Coil Operation 80 40 20 200 15 1000 8 4 * Measured at 50 Hz 6.