Product Name: 609 FF-502 Electro-Hydraulic Flow Control High Contamination Servo Valve (40L, 100mA) Model NO.: FF-502 Power: Hydraulic Precision Control: Custom Design High Contamination Resistance: Null Adjustment Rated Flow: 40 L/Min Rated Current: 100mA Affordable Replacement for Moog: Moog G631 Trademark: 609 Transport Package: Carton Specification: national standard Origin: Nanjing China HS Code: 848180 Product Description FF-502Double flapper-nozzle force feedback, two stage electro-hydraulic flow control servo valveAffordable replacement for Moog G631Features:An effective anti-contamination industrial servo valve, high reliability and quality performance.Mechanical null adjustment available for customers to adjust valve null bias.Manual override available to operate valve manually.An optional fifth supply port available on order to provide fluid to flapper nozzle stage.External filter, protection filter easy to replace.Performance data:ITEMMODEL FF-502SUPPLY PRESSURE[MPa]2~28RATED SUPPLY PRESSURE Ps[MPa]21RATED FLOW Qn[L/min](valve pressure drop 7MPa)10,20,40,60, 80RATED CURRENT In [mA]100HYSTERESIS [ % ]≤5THRESHOLD [ % ]≤1LINEARITY[ % ]≤7.5SYMMETRY[ % ]≤10PRESSURE GAIN[%Ps/1% In]>30INTERNAL LEAKAGE[L/min]≤3.5NULL BIAS[ % ]≤±3LAP[ % ]-2.5~ +2.5NULL SHIFT WITH SUPPLY PRESSURE (80~110% Ps)[ % ]≤±4NULL SHIFT WITH RETURN PRESSURE (0~20% Ps)[ % ]≤±4FREQUENCE RESPonSEAMPLITUDE RATIO WITH (-3dB)[ Hz ]≥17PHASE LAG WITH (-90°)[ Hz ]≥35WORKING TEMPERATURE[ ºC ]-30~ +95NET WEIGHT[ kg ]2.3Ratedcurrent, coil resistance and inductanceRESISTANCE OF EACH COIL AT 20ºC(Ω)RATED CURRENT (mA)PROXIMATE COIL INDUCTANCE(H)Differential, parallel or individual coilsseriesseriesindividualparallel28100500.80.250.2