Model NO.: D633
Trademark: WK
Specification: Standard
Origin: China
HS Code: 84818010
Model NO.: D633
Trademark: WK
Specification: Standard
Origin: China
HS Code: 84818010
 Performance indicesÂ
| Item | Unit | Index | |
| Supply pressure Ps | MPa | 2~28 | |
| Rated supply pressure Pn | MPa | 21 | |
| Rated flow Qn() | L/min | 20 | |
| Rated current In | mA | 10 | |
| Hysteresis | % | ≤0.2 | |
| Threshold | % | 0.3 | |
| Nonlinearity | % | ≤±7.5 | |
| Unsymmetry | % | ≤±7.5 | |
| Pressure GAIN | % | >30 | |
| Internal leakage | L/min | ≤1.5 | |
| Null bias | % | ≤±1.5 | |
|
Frequency response |
Amplitude ratio with (-3dB) | Hz | ≥30 |
| Phase lag with (-90°) | Hz | ≥50 | |
| Working temperature | ºC | -15~100 | |
| Weight | kg | ≈1.2 | |
Overall and installation dimensions
Overall dimensions
Installation dimensions
*Requirement: Flatness less than 0.01mm, roughness below   .
| Â | P | A | B | T | Y | F1 | F2 | F3 | F4 | G |
| Â | Ñ„7.5 | Ñ„7.5 | Ñ„7.5 | Ñ„7.5 | Ñ„3.5 | M5 | M5 | M5 | M5 | Ñ„2 |
| x | 21.5 | 12.7 | 30.2 | 21.5 | 40.5 | 0 | 40.5 | 40.5 | 0 | 33 |
| y | 25.9 | 15.5 | 15.5 | 5.1 | 9 | 0 | -0.75 | 31.75 | 31 | 31.75 |
Comparison between Servo Valve Model and Moog Model
                                   Â
| WK Â Â Â Model | MOOGÂ Â Â Model |
| SFL218Â Â Â Â Series | MOOG 760/761Â Series |
| SFL218AÂ Â Â Â Â Â Series | MOOG G631Â Â Â Â Series |
| SFL218BÂ Â Â Â Â Â Series | MOOG062Â Â Â Â Series (PLASSER) |
| SFL214,216Â Â Series | MOOG 072Â Â Â Â Â Â Series |
| SFL212AÂ Â Â Â Â Â Series | MOOG 30Â Â Â Â Series |
| SFL212/BÂ Â Â Â Â Series | MOOG 31Â Â Â Â Series |
| SFZ141Â Â Â Â Â Series | MOOG D633Â Â Â Â Series |
| SFZ142Â Â Â Â Â Series | MOOG D634Â Â Â Â Series |
| SFL317Â Â Â Â Series | MOOG792Â Â Â Â Series |
| SFL316Â Â Â Â Series | MOOG791Â Â Â Â Series |
| SFD234Â Â Â Â Series | MOOG D661Â Â Â Â Series |
Certificate test
  Performance indices
Â
| Item | Unit | Index | |
| Supply pressure Ps | MPa | 2~28 | |
| Rated supply pressure Pn | MPa | 21 | |
| Rated flow Qn() | L/min | 20 | |
| Rated current In | mA | 10 | |
| Hysteresis | % | ≤0.2 | |
| Threshold | % | 0.3 | |
| Nonlinearity | % | ≤±7.5 | |
| Unsymmetry | % | ≤±7.5 | |
| Pressure GAIN | % | >30 | |
| Internal leakage | L/min | ≤1.5 | |
| Null bias | % | ≤±1.5 | |
|
Frequency response |
Amplitude ratio with (-3dB) | Hz | ≥30 |
| Phase lag with (-90°) | Hz | ≥50 | |
| Working temperature | ºC | -15~100 | |
| Weight | kg | ≈1.2 | |
Overall and installation dimensions
Overall dimensions
Installation dimensions
*Requirement: Flatness less than 0.01mm, roughness below   .
| Â | P | A | B | T | Y | F1 | F2 | F3 | F4 | G |
| Â | Ñ„7.5 | Ñ„7.5 | Ñ„7.5 | Ñ„7.5 | Ñ„3.5 | M5 | M5 | M5 | M5 | Ñ„2 |
| x | 21.5 | 12.7 | 30.2 | 21.5 | 40.5 | 0 | 40.5 | 40.5 | 0 | 33 |
| y | 25.9 | 15.5 | 15.5 | 5.1 | 9 | 0 | -0.75 | 31.75 | 31 | 31.75 |
Comparison between Servo Valve Model and Moog Model
                                   Â
| WK Â Â Â Model | MOOGÂ Â Â Model |
| SFL218Â Â Â Â Series | MOOG 760/761Â Series |
| SFL218AÂ Â Â Â Â Â Series | MOOG G631Â Â Â Â Series |
| SFL218BÂ Â Â Â Â Â Series | MOOG062Â Â Â Â Series (PLASSER) |
| SFL214,216Â Â Series | MOOG 072Â Â Â Â Â Â Series |
| SFL212AÂ Â Â Â Â Â Series | MOOG 30Â Â Â Â Series |
| SFL212/BÂ Â Â Â Â Series | MOOG 31Â Â Â Â Series |
| SFZ141Â Â Â Â Â Series | MOOG D633Â Â Â Â Series |
| SFZ142Â Â Â Â Â Series | MOOG D634Â Â Â Â Series |
| SFL317Â Â Â Â Series | MOOG792Â Â Â Â Series |
| SFL316Â Â Â Â Series | MOOG791Â Â Â Â Series |
| SFD234Â Â Â Â Series | MOOG D661Â Â Â Â Series |
Certificate test
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