Servovalves with integrated Electronics D791 and D792 Series
Servovalves with integrated Electronics D791 and D792 Series
Servovalves with integrated Electronics D791 and D792 Series
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<strong>D791</strong> <strong>Series</strong>Technical dataModel . . . .Type <strong>D791</strong> . . . . S . . .Mounting pattern ISO, but X <strong>and</strong> Y do not corres- ISO 10372-06-05-0-92pond to ISOValve body version4-way3-stage <strong>with</strong> bushing spool assemblyPilot valve2-stage, optional D761 or D765 <strong>Series</strong>Pilot connection optional, internal or external X <strong>and</strong> YMass [kg] 13Rated flow(± 10%) at Dp N= 35 barper l<strong>and</strong> [l/min] 100 160 250Response time*for 0 to 100% stroke (dependenton pilot valve) [ms] 3 to 10Threshold* [%] < 0,2Hysteresis* [%] < 0,5Null shift <strong>with</strong> DT = 55 K [%] < 2Null leakage flow* total, max. [l/min] 5 7 10Pilot leakage flow*max., for 100% step input (dependenton pilot valve) [l/min] 4 to 11Main spool stroke [mm] 1,6 1,6 2,0Main spool drive area [cm²] 2,85* measured at 210 bar pilot or operating pressure, fluid viscosity of 32 mm²/s <strong>and</strong> fluid temperature of 40 °CTypical characteristic curves measured at 210 bar pilot or operating pressure, fluid viscosity of 32 mm²/s <strong>and</strong> fluid temperature of 40 °CValve flow diagramFrequency responsefor valves <strong>with</strong> different rated flows <strong>and</strong> different pilot valvesRated flow 100/160 l/minPilot valve D761 Std 10 l/minRated flow 100/160 l/minPilot valve D765 HR10 l/minValve flow for maximum valve opening (100% comm<strong>and</strong>signal) as a function of the valve pressure dropRated flow 250 l/minPilot valve D761 Std10 l/minRated flow 250 l/minPilot valve D761 HR 20 l/min4
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