Servo valves
For consistent machine operation, Vickers by Danfoss servo valves provide closed-loop control with exact positioning, repeatable velocity profiles, and predictable force or torque regulation. At pressures up to 350 bar [5,000 psi] and flows up to 151 l/min [40 US gal/min], the symmetric designs enable dependable control-flow metering, minimal null shift, and frequency response over 100 Hz with a 90-degree phase lag.
Features and benefits
- Two-stage modular flow control valves provide infinite cylinder position control to within 0.025 mm [0.001 in] or better, as well as infinite proportional flow control for real-time velocity/acceleration profiles when applied with servo hydraulic motors, tachometers, and electronics.
- Closed-loop control provides exact positional accuracy, repeatable velocity profiles, and predictable force or torque regulation.
- Subplate or manifold mounted, SM4 and SX4 servo valves have a symmetrical design and dependable metering of control flow with minimum null shifts for more consistent machine operation.
- Spool and sleeve are hardened stainless steel to minimize wear and erosion.
- High-strength aluminum alloy parts are durable yet lightweight.
- Integral 35-micron absolute filter reduces sensitivity to contamination.
- Standardized port circle and mounting pattern, with available adapter manifolds, make SM4 and SX4 servo valves an affordable way to enhance hydraulic systems.
Applications
- Tilting trains
- Presses
- Primary metals
- Plastic injection molding, blow molding
- Pulp, paper, and wood processing
- Test equipment and simulation
- Turbine control (steam)
Specifications
- Frequency response over 100 Hz at the 90-degree phase lag
- Pressure up to 350 bar [5,000 psi]
- Flow up to 151 l/min [40 US gal/min]
- Optimal closed loop control