1 62 series servovalves 62 Series . TWO STAGE Servovalves . 62 series servovalves . The 62 Series flow control design is simple and rugged for per assembly within the flexure Once the restoring torque Servovalves are throttle valves dependable, long life operation. tube. Deflection of the flapper becomes equal to the torque for 3- and preferably 4-way These valves are suitable for restricts fluid flow through one from the magnetic forces, the are a standard electrohydraulic position, speed, nozzle which is carried through armature/flapper assembly performance, two-stage design pressure or force control to one spool end, displacing moves back to the neutral that covers the range of rated systems with high dynamic the spool.
2 Position, and the spool is held flows from to 20 gpm at response requirements. open in a state of equilibrium 1000 psi valve output Movement of the spool opens until the command signal stage is a closed center, four- Principle of operation the supply pressure port (P) to changes to a new level. way sliding pilot An electrical command signal one control port, while simulta- stage is a symmetrical double- (flow rate set point) is applied neously opening the tank port In summary, the spool position nozzle and flapper, driven by to the torque motor coils, and (T) to the other control port. is proportional to the input a double air gap, dry torque creates a magnetic force which The spool motion also applies current and with constant motor.
3 Mechanical feedback of acts on the ends of the pilot a force to the cantilever spring, pressure drop across the valve, spool position is provided by a stage causes a creating a restoring torque on flow to the load is proportional cantilever valve deflection of the armature/flap the armature/flapper assembly. to the spool position. VALVE FEATURES. 2-stage design with dry torque motor Low cost design Low friction double nozzle pilot stage Rugged, long-life design High spool control forces High resolution, low hysteresis High dynamics Completely set-up at the factory The actual flow is dependent p upon electrical command signal Q = QN. and valve pressure pN. 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. 62 Series . GENERAL TECHNICAL DATA. Operating Pressure ports P,A and B up to 3,000 psi Flow Rate Q (gpm). port T up to 2,000 psi Temperature Range Fluid 0 F to 200 F. Ambient 0 F to 200 F Seal Material Viton, others on request Operating Fluid Compatible with common pm 0g hydraulic fluids, other fluids 20. on request. pm 0g Recommended viscosity 60-450 SUS @ 100 F 15. System Filtration: High pressure filter (without bypass, pm 0g but with dirt alarm) mounted in the main flow and if possible, 10. directly upstream of the valve. Class of Cleanliness: The cleanliness of the hydraulic fluid greatly effects the performance (spool positioning, high resolution) gpm and wear (metering edges, pressure gain, leakage) of the servovalve.
5 Recommended Cleanliness Class For normal operation ISO 4406 < 14/11 For longer life ISO 4406 < 13/10 gpm 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). Shipping Plate Delivered with an oil sealed shipping plate. 200 500 1000 2000 3000. Valve Pressure Drop p (psi). Valve Flow Diagram Valve flow for maximum valve opening (100% command signal) as a function of the valve pressure drop. P A T B. 3. 62 Series . TECHNICAL DATA. Model ..Type 62 .. Mounting Pattern ISO 10372 - 04 - 04 - 0 -92. Valve Body Version 4-way 2-stage with spool bushing design Pilot Stage Nozzle/Flapper, High flow Pilot Connection Internal only Rated Flow ( 10%) at pN = 1,000 psi [gpm] Response Time* [ms] 60 60 60 60 60.
6 Threshold* [%] < 1%. Hysteresis* [%] < 5%. Null Shift at T = 100 F [%] < 5%. Null Leakage Flow* max. [gpm] to * Measured at 1,000 psi operating pressure Typical characteristic curves with 5% to 100% Frequency Response Step Response input signal, measured at 100. Stroke (% of max). +2. Amplitude Ratio (dB). 100%. 1,000 psi operating pressure. 0 1000 psi Supply DTE-24 at 100 F (38 C). -2 80. -4 75%. -6 1000 psi (70 Bar). 60. DTE-24 at 100 F (38 C). -8 5% to 100% amplitude 100. Phase Lag (degrees). 50%. -10 80 40. -12 60. 40 20 25%. 20. 0 0. 1 2 3 4 5 7 10 20 30 40 0 15 30 45 60. Frequency (Hz) Time (msec). 4. 62 Series . INSTALLATION DRAWINGS..328 [ ] DIA THRU. [ ] CBORE .531 [ ] DIA TO. DEPTH SHOWN (.450 REF)..875..008 M.
7 [ ]. 4 MOUNTING HOLES. R. MAX. [ ]. [ ]. MAX [ ] [ ] [ ]. P. REMOVE COVER. SCREW FOR ACCESS TO ELECTRICAL EXTERNAL NULL ADJUST CONNECTOR [ ]. (.125 HEX SOCKET) PIN D [ ]. PIN A [ ]. PIN C PIN B. MAX. [ ]..465 [ ] [ ]..09 DIA .09 MAX MAX. [ ] [ ] [ ] [ ]..450. LOCATING PIN. [ ]. TYPICAL SUBPLATE MANIFOLD. Null Adjust: Flow out of Control RETURN PORT T ( ) .3125-18 UNC-2B THD Port B will increase with clockwise .007 M..344 DIA THRU..875. 4 VALVE MTG HOLES. rotation of null adjust screw ( ). CBORE .515 DIA x .63 DP .875 .312 DIA (1/8 hex key)..014 M .014 M..437 4 MOUNTING HOLES 4 PLACES 4 PL. CONTROL PORT A. 1. The mounting manifold must conform to ( ) ISO 10372-04-04-0-92..437. (65)..875 Surface to which valve is mounted requires a [ ].
8 500 32. finish, flat within [ ] TIR. VALVE MOUNTS ON THIS. MANIFOLD SURFACE. CONTROL PORT B..136 DIA X .20 DEEP..390 PORT PER SAE J1926..015 M. UN-2B. DASH 12 STR THD O-RING. PRESSURE PORT P. BOSS (.75 TUBE OD REF). 32 4 PLACES..002. P. 5. 62 Series . ELECTRICAL CONNECTIONS. Rated current and Coil connections Servoamplifier coil resistance A four-pin electrical The servovalve responds Two different coil designs connector (that mates to input current, therefore are available for 62 Series with an MS3106R14S-2S) a servoamplifier that has Servovalves . See Table 1. is standard. All four torque high internal impedance motor leads are available (as obtained with current at the connector so external feedback) should be used.
9 Connections can be made for This will reduce the effects Series , parallel or differential of coil inductance and will operation. minimize changes due to coil resistance variations. ELECTRICAL Parallel Series Single CONNECTIONS. (Example with typical 62 Series coils). A B C D A B C D A B C D. Coil Resistance [ ] 14 56 28. Rated Current [mA] 100 50 100. Electrical Power [W] .14 .14 .28. 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 pressured. 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 28 100 50 300 30 15 2 7 2.
10 * Measured at 50 Hz. 6. 62 Series . ORDERING INFORMATION. SPARE PARTS AND ACCESSORIES. Model Number Type Designation 62 . Optional Feature Signals for 100% Spool Stroke Series specification Q 15 mA Series ( 30 mA parallel). K Intrinsically safe R 50 mA Series ( 100 mA parallel). Y Special signal (see spec sheet)*. Model Designation Assigned at the factory Valve Connector A Connector C1 (A) side (RH). Factory Identification (Revision Level) B Connector C2 (B) side (LH). Value Version Seal Material S Standard response V Viton N NBR (Buna). Rated Flow Others on request*. QN[gpm] at pN = 1,000 psi 10 Pilot Connection and Pressure 20 Pressure [psi] Supply 40 A 250 to 3,000 internal 60 Spool Position without Electrical Signal 75 M Mid position Maximum Operating Pressure Pp and Body Material Pilot Stage F 3,000 psi aluminum F Standard dynamics Main Spool Type O 4-way / axis cut / linear D 4-way / +/-10% overlap / linear X Special*.