Vickers | KDG4V32C08SMWH40
KDG4V32C08SMWH40
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The KDG4V32C08SMWH40 proportional valve belongs to the KDG Non-feedback Proportional Valves series and is manufactured by Vickers for precise flow control in hydraulic automation systems. It is rated for a 100% ED duty factor, so the coil can remain energized continuously without overheating. A frequency response of 18 Hz at −3 dB permits stable modulation of actuator speed during dynamic cycles. Pressure at the P, A, and B ports can reach 350 bar (5000 psi), which makes the unit suitable for high-pressure circuits. The internal geometry tolerates a pressure drop of 210 bar (3000 psi) while maintaining proportional control accuracy. Its looped P-A-B-T flow path provides predictable meter-in and meter-out characteristics. The valve functions in ambient oil temperatures from 20 °C to 82 °C, allowing use beside common industrial reservoirs. It handles hydraulic fluids with viscosities between 16 and 54 cSt to support consistent spool movement. An IP65 enclosure under IEC 144 shields the solenoid and wiring against dust and low-pressure water jets.
Installation details for the KDG4V32C08SMWH40 are standardized to simplify integration into common manifolds. The base conforms to the ISO 4401-AB-03-4-A pattern, also known as NFPA D03, so it mates directly with subplates of that size. Mounting surfaces must be held within 0.013 mm flatness to prevent internal leakage, and a surface roughness of 1.1 µm Ra is required to maintain O-ring sealing. Securing bolts are tightened between 4.5 and 6.0 Nm to sustain clamping force without deforming the body. Back-pressure at the T port is limited to 100 bar (1450 psi) to protect spool position under return flow. A water-resistant manual override allows local shifting when electrical power is unavailable. External piping attaches through NPT threads, providing a widely used tapered connection in North American plants.
Technical Specifications
Duty Factor
100% ED (Continuous)
Flow Path
Looped (P-A-B-T)
Fluid Viscosity Range
16-54 cSt
Frequency Response
18 Hz (-3 dB)
Manual Override Type
Water-Resistant
Max Operating Pressure (p/a/b)
350 bar (5000 psi)
Max Pressure Drop
210 bar (3000 psi)
Max Tank Port Pressure (t)
100 bar (1450 psi)
Mounting Bolt Torque
4.5-6.0 Nm
Mounting Pattern
ISO 4401-AB-03-4-A (NFPA D03)
Mounting Surface Flatness
0.013 mm
Mounting Surface Roughness
1.1 micrometer
Operating Temperature Range
20 to 82 C
Protection Rating
IP65 (IEC 144)
Thread Connection
NPT
1620 Old Apex Road
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