HVM 6 Page /4 Elektrohydraulic Servovalves Typ HVM 6 Symbol A B P T L Special features: high reliability easy service robust construction high dynamic response relatively insensitive to contamination variable metering orifices only Qmax = 5l/min at Dp =7bar pmax = 5 bar Technical Data General description: Type : electrical input stage, torque motor, sliding spool system Pilot : none main spool : directly controlled 4-way sliding spool Style of mounting : subplate / Cetop Mounting position : unrestricted Weight :,kg. Hydraulic Data (definition according to DIN 4). pressure pn = [bar]. operating pressure pb min = [bar] pb max = 5 [bar].. return line pressure pr max = [bar] static.. no separate leakage line necessary. max. pressure (static test pressure) pmax = 45 [bar].4 flow at Dp = 7 bar QN = //5 [l/min].5 quiescent flow, max. at pn Q < 5% QN.6 hysteresis H < 4,5% i N (without Dither) % i N (with Dither).7 threshold sensitivity E <,4% i N (without Dither),% i N (with Dither).8 threshold span S < % i N (without Dither) < % i N (with Dither).9 linearity deviation < % i N. flow symmetry -QN zu +QN < % i N. pressure gain (see diagram) VN >, Pb / % i N. overlap, standard h = -...+% i N. operating temperature range dm = 5...5 [K].. temperature drift % i N / 5K.4 viscosity range of fluid gmin =... mm /s approximate value normal: ISO VG...ISO VG 46.5 filtration of fluid < class 4-5 to NAS 68 or class 5/4/ to ISO 446 status /.6 fluid standard = HLP-hydraulic oils as per DIN 554 Teil (Special equipments possible)
HVM 6 Page /4. Diagrams HVM 6 Flow rate-signal function Q (%) 75 Q=f(i) bei Dp=constant 5 5-5 -5-75 - - -75-5 -5 5 5 75 in (%) Pressure gain Pb (%) V p = tan a = D p D I 5 A B -4 - - - 4 in (%) Frequency Response Coils: x65w Power Supply.: ±V Pv: bar ±% I ±% I Amplitude / db - - - -4-5 9 8 7 6 5 4 Phase ( ) ±% I ±% I status / Hz
status 9/ HVM 6 Page /4.Electrical Data. Electrical Data without Electronic connector (M8x) Standard-coils parallel at and ; NC coil type inductance / coil technical Data per coil, coils ope Standard version coils parallel +V, V flow from P to B Special equipment Coils serially +V, -V flow from P to B Special equipment Coils to > to flow from P to A 6 mh ± ma 65W,65 W ± ma W, W ± ma W, W ma 65W,6 W.. Electrical Data with Electronic Power supply: 4V DC (8V... 8V) Current: 5mA max. Input signal: -V...,... +V Input : kohm Signal direction: from Pin D to Pin E Internal coil : ma... ma... ma Test signal output: Volt... V... Volt Valve oil flow: %... %... % Flow direction: +V = P > A - B > T,V = Valve closed -V = P > B - A > T.. Bloc diagram Servovalve with integ electronics A +4V B V C Spare driver D Signal+..+/-V E Signal- Sum-and-difference amplifiers contr. F Test output..+/-v G PE Ohm Protective groundings A P B T Reminds: To avoid potential drifting problems, connect Pin E with low (< ohm) to Pin B. The electrical-hydraulic working direction can be changed to reversed connection on Pin D and Pin E Cable recommendation: twisted pair cable upto cable length 5 mtr.: Type LiYCY xx,5 mm or LiYCY4xX,5mm, if you will use the test signal out. up to cable length mtr.: Type LiYCY xx,75 mm or LiYCY 4xx,75 mm, if you will use the test signal out. connector 7 pol. DIN 456 E F A B G D C View on the valve Pins visible
HVM 6 Page 4/4 Order Information HVM 6-5 - - XX - E Model 6 Rated flow QN at Dp =7 bar l/min l/min l/min Seal material Perbunan Viton Butyl 4 Vulkollan 5 Ethylen-Propylen Resistance / coil [R],5 W (x65 W parallel) 65 W (coil) Overlap Zero overlap Positiv overlap Negativ overlap Amount of overlap positiv or negative..9 Design letter assigned by manufacturer Elektronic E Voltage input ±V E Current input 4...mA P > A E Current input 4...mA P > B 5.Accessories: Description Order No. Connector pol. KE 79-46-5-49 Connector 9 pol. KE 79-48-5-5 Connector 7pol. KE CA 6 COM 4S 7S 855 Sub plate NG 6 HZ 5 976 scavenger plate NG 6 HZ 69686 Box-Amplifier BOE XXX-5--5-A 46965 status / Important remarks: Valve mounting surface must be flat within,mm and smoothness not to exceed 6µm. Easy hydraulic Zero adjustment by means of Allen key S8 DIN 9. Max. permissible drain line pressure bar.valves with modified characteristics available. Modifications, which serve technical progress, remain reserving.