- Hysteresis ≤6%
- Repeatability ≤3%
- Mounts on standard D05, D07, D08, D10 subplates
- Spool types: E, EA, W, WA
General Description
Proportional directional control valve Model 4 WRZ is a pilot-operated, two-staged, spool valve. It controls the direction and quantity of flow to an actuator for smooth acceleration to a desired velocity. The valve is normally operated by the appropriate amplifier card.
Pilot Operated, Model 4 WRK with Feedback
Model 4 WRKE Feedback with Integrated Electronic
Size 10 to 35 4600 PSI 740.0 GPM
- Hysteresis ≤1%
- Repeatability ≤0.5%
- Mounts on standard D05, D07, D08, D10 subplates
- Integral electronics (4 WRKE)
- High Response Time
- Spool types: E, Q, W
General Description
Control valves Model 4 WRK and 4 WRKE are pilot-operated 2-stage proportional directional valves. They control the direction and quantity of flow to an actuator for smooth acceleration to a desired velocity. The main stage is under closed-loop control, so even at high flow, the spool position is maintained independently of the high-flow forces that occur. The valve is normally operated by the appropriate amplifier card or by the integrated electronics.
Pilot Operated, Model 4 WRTE with Feedback and Integrated Electronics
Size 10 to 32 5100 PSI 422.0 GPM
- Hysteresis ≤1%
- Response sensitivity ≤0.5%
- Mounts on standard D05, D07, D08, D10 subplates
- Integral electronics (4 WRKE)
- Suitable for controlling position, velocity, pressure, and force
- Spool types: E, V, Q, W
General Description
Model 4 WRTE is a pilot-operated 2-stage proportional directional valve. It controls the direction and quantity of flow to an actuator for smooth acceleration to a desired velocity. The main stage is under closed-loop control, so even at high flow, the spool position is maintained independently of the high flow forces that occur. The valve is normally operated by the integrated electronics.
Servo Pilot Operated, Model 4 WRD
Model 4 WRDE with Integrated Electronics
Size 10 to 35 5100 PSI 740.0 GPM
- Hysteresis ≤1%
- Repeatability ≤0.5%
- Electrical feedback on main spool
- Mounts on standard D05, D07, D08, D10 subplates
- Integral electronics (4 WRDE)
- Excellent metering capabilities due to V V-notched spool
- Models for pressure, flow, speed, and position control
- Spool types: E, V, Q, W
General Description
Servo pilot-operated proportional directional control valves, Models 4 WRD and 4 WRDE, are electronically operated 3-stage proportional directional valves. They control the start, stop, direction, and quantity of flow to an actuator for smooth acceleration to a desired velocity. The main stage is under closed-loop control so that even at high flow, the spool position is maintained independently of the high flow forces that occur. The valve is normally operated by the integrated electronics or the appropriate amplifier card.