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Servo Valve
4WRA …XE
- Size 6
- Component series 2X
- Maximum operating pressure 315 bar
- Maximum flow 22 l/min
- Area of application in accordance with the Explosion Protection Directive 2014/34/EU: II 2G
- Type of protection of the valve solenoids: Ex eb mb IIC T4 Gb according to EN 60079-7 / EN 60079-18
general
| Type | 4WRA | ||
| Size | 6 | ||
| Installation position | any, preferably horizontal | ||
| Ambient temperature range | °C | -20 … +60 | |
| Storage temperature range | °C | +5 … +40 | |
| Maximum storage time 1) | yrs | 1 | |
| Weight | 4WRA 6…XE | kg | 4.4 |
| 4WRA 6…A…XE | kg | 2.7 | |
| Surface protection | Galvanized | ||
| 1) | see operating instructions 29055-XE-B |
hydraulic
| Size | 6 | ||
| Maximum operating pressure | bar | 315 | |
| Maximum operating pressure | Port P | bar | 315 |
| Port T | bar | 210 | |
| Anschluss A | bar | 315 | |
| Port B | bar | 315 | |
| Maximum flow | l/min | 22 | |
| Nominal flow | l/min | 6 10 18 | |
| Hydraulic fluid | see table | ||
| Hydraulic fluid temperature range | NBR seals | °C | -20 … +80 |
| FKM seals | °C | -15 … +80 | |
| Viscosity range | mm²/s | 20 … 380 | |
| preferably | mm²/s | 30 … 46 | |
| Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1) | Class 17/15/12 | ||
| Hysteresis | % | ≤ 6 | |
| Range of inversion | % | ≤ 2 | |
| Response sensitivity | % | ≤ 1 | |
| Maximum surface temperature | °C | 120 | |
