609 FF-502 Electro-Hydraulic Flow Control Servo Valve
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  • 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

 


Safe production
In the case of production of dozens or hundreds of stamped parts per minute, processes such as feeding, stamping, dispatching, and evacuation of waste materials are often performed in a short period of time, and personal, equipment, and quality accidents often occur. Therefore, safe production in stamping is a very important issue. Stamping safety measures for LW are:

1 to achieve mechanization, automatic feed and discharge.

2 Set up mechanical guards to prevent hand injuries. Use mold guards, automatic return devices and hand tools to access the material. 

3 set up electrical protection, power off device. Set photoelectric or air curtain protection switch, two-handed or multi-handed series start switch, anti-misoperation device and so on. 

4 Improve the clutch and brake structure. After the danger signal is issued, the crankshaft, connecting rod and punch of the press can be immediately stopped in place.

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