Description
Woodward 8573-885
Technical Specifications:
- Input Signal: 4-20mA DC.
- Output Signal: Linear proportional hydraulic/pneumatic pressure.
- Compatibility: Matches Woodward 505, MicroNet, and various PLCs.
Functional Features:
- High Linearity: Ensures distortion-free transmission of control signals.
- Strong Anti-Interference: Internal circuits feature comprehensive electromagnetic shielding and filtering.
- Wide Compatibility: Seamlessly integrates with modern and legacy control architectures.
Application Scenarios:
Used in retrofits (converting mechanical to electronic control), steam valve control, fuel valve control, and precise position control of single-acting power cylinders.
Performance Parameters:
- Output Pressure Range: 0-10 MPa (depending on specific configuration).
- Linearity Error: Less than ±0.5% F.S.
- Response Time: Less than 50ms.
Material Composition:
Die-cast aluminum alloy housing. Internal piezoelectric valves or torque motor components utilize precision ceramics and specialty alloys.
Structural Features:
Compact size with standard flange or threaded interfaces. Features intuitive electrical terminals and pressure test ports.
Working Principle:
Input current generates electromagnetic force in the torque motor coil, overcoming spring resistance to create micro-displacement in the flapper/nozzle (or piezoelectric element). This changes the backpressure, which is amplified pneumatically/hydraulically to output precise control pressure.
Installation Requirements:
Install away from strong vibration sources and high-temperature radiation zones. Signal cables must be shielded twisted pairs with single-point grounding.
Usage Precautions:
Never short-circuit or over-pressurize the output port. Zero and full-scale electrical calibration must be performed upon replacement.
