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KRACHT - Model NG 06 WL 4.06 -Directional Control Valves
The directional control valves WL 4/06 consists of housing (1), a control spool (5) with two centering springs (4) and cylindrical operating solenoids (2, 3). The three-position directional valves are fitted with two solenoids and two springs. Two-position directional valves have either one solenoid and one return spring or two solenoids and a detent assembly.
The operating solenoids are D.C. solenoids. For AC supply the solenoids are provided with a rectifier, which is integrated directly into the connector. The plug connectors (6, 7) can be turned by 90°. By loosening the fixing nut (8), the solenoids can be turned arbitrarily in the range of 360°, or replaced. This enables the operating coils to be replaced without opening the pressure-tight spaces. In the case of solenoid malfunction or power failure, the spool of the valve can be repositioned by manual override (9), provided the pressure in T-port does not exceed 25 bar. The basic surface treatment of the valve housing (1) is phosphate coated and the operating solenoids (2, 3) are zinc coated.
- Nominal size : 6
- Maximum flow : see p-Q characteristics
- Max. operating pressure at ports P, A, B : 4641 psi (320 bar)
- Max. operating pressure at port T : 2320 psi (160 bar)
- Pressure losses : see Ap-Q characteristics
- Hydraulic fluid : Hydraulic oils of DIN 51254/25 other Hydraulic fluids on request
- Fluid temperature range (NBR) : -22... +176°F (-30 ... +80 °C)
- Ambient temperature range : ...+122°F(... +50 °C)
- Viscosity range : 98... 1840SUS(20...400mm2/s)
- Maximum degree of fluid contamination : Class 18/15 to ISO 4406. Therefore we recommend a filter with a retention rate p10 ^ 75.
- Permissible rated voltage variation : DC:-10...+6% AC: ±10%
- Max. switching frequency : 15000 1/h
- Switching time, on; atv = 98SUS(20mm2/s) : DC: 30 ...50 ms AC: 30 ...40ms
- Switching time, off; atv = 98SUS(20mm2/s) : DC: 10...50 ms AC: 30 ...70ms
- Duty cycle : 100 %
- Service life : 107 cycles
- Enclosure type to DIN 40050 : IP 65
- Weight-valve with 1 Solenoid valve with 2 Solenoids : 3.52 Lb (1.6 kg) 4.84 Lb (2.2 kg)
- Mounting position : optional