• Model NO.: FF-502
  • Precision Control: Custom Design
  • Rated Flow: 10, 20, 40, 60, 80 L/Min
  • Affordable Replacement for Moog: Moog G631
  • Specification: national standard
  • HS Code: 848120
  • Power: Hydraulic
  • High Contamination Resistance: Null Adjustment
  • Rated Current: 100mA
  • Trademark: 609
  • Origin: Nanjing China
FF-502

Double flapper-nozzle force feedback, two stage electro-hydraulic flow control servo valve
Affordable replacement for Moog G631
Features:
  1. An effective anti-contamination industrial servo valve, high reliability and quality performance.
  2. Mechanical null adjustment available for customers to adjust valve null bias.
  3. Manual override available to operate valve manually.
  4. An optional fifth supply port available on order to provide fluid to flapper nozzle stage.
  5. External filter, protection filter easy to replace. 
    6.  

Performance data:


ITEM MODEL FF-502
SUPPLY PRESSURE[MPa] 2~28
 RATED SUPPLY PRESSURE Ps[MPa] 21
RATED FLOW Qn[L/min](valve pressure drop 7MPa) 10,20,40,60, 80
RATED CURRENT In [mA] 100
HYSTERESIS [ % ]  ≤5
THRESHOLD [ % ] ≤1
LINEARITY[ % ] ≤7.5
SYMMETRY[ % ] ≤10
PRESSURE GAIN[%Ps/1% In] >30
INTERNAL LEAKAGE[L/min] ≤3.5
NULL BIAS[ % ] ≤±3
LAP[ % ] -2.5~ +2.5
NULL SHIFT WITH SUPPLY PRESSURE (80~110% Ps)[ % ] ≤±4
NULL SHIFT WITH RETURN PRESSURE (0~20% Ps)[ % ] ≤±4
FREQUENCE RESPONSE AMPLITUDE RATIO WITH (-3dB)[ Hz ] ≥17
PHASE LAG WITH (-90°)[ Hz ] ≥35
WORKING TEMPERATURE[ ºC ] -30~ +95
NET WEIGHT[ kg ] 2.3


Rated current, coil resistance and inductance

RESISTANCE OF EACH COIL AT 20ºC(Ω) RATED CURRENT (mA) PROXIMATE COIL INDUCTANCE(H)
Differential, parallel or individual coils series series individual parallel
28 100 50 0.8 0.25 0.2

 


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