Product Overview

The Parker D31FBE01CC4NF00 is a D31FB OBE pilot-operated proportional directional control valve in NG10 / CETOP 05 configuration.

The D31FB architecture uses a two-stage hydraulic control concept. A proportional pilot pressure-reducing stage controls the main stage, while main-stage feedback supports stable spool operation. Parker’s official documentation covers the D31FB, D41FB, D91FB and D111FB families in NG10, NG16, NG25 and NG32 sizes respectively.

For the complete model D31FBE01CC4NF00, the configuration corresponds to:

• E01 spool
• 75 L/min flow code
• Internal pilot inlet / internal pilot drain
• 0–±10 V command
• P-B proportional function
• NBR seals
• Standard valve option
• Integrated onboard electronics

Parker specifies 75 L/min at Δp = 5 bar per metering edge for the D31FB C flow configuration. The D31FB platform is rated for up to 350 bar operating pressure, with a minimum pilot pressure of 30 bar plus T/Y pressure and optimum dynamic behavior around 50 bar pilot pressure.

Our replacement valves are manufactured around the complete ordering code and undergo 100% simulated operating-condition testing covering proportional response, pilot pressure, spool movement, leakage and electronic operation.

Technical Specifications (Bulleted List)

• Manufacturer: Parker Hannifin
• Product Family: D31FB OBE
• Model: D31FBE01CC4NF00
• Valve Type: Pilot-Operated Proportional Directional Control Valve
• Nominal Size: NG10 / CETOP 05
• Construction: Two-stage / pilot operated
• Spool: E01
• Flow Code: C
• Nominal Flow: 75 L/min
• Test Condition: Δp = 5 bar per metering edge
• Maximum Operating Pressure: 350 bar
• Maximum Pilot Pressure: 350 bar
• Minimum Pilot Pressure: 30 bar + T/Y pressure
• Optimum Dynamic Pilot Pressure: 50 bar
• Pilot Connection: Internal inlet / internal drain
• Command Signal: 0–±10 V
• Function: 0–+10 V = P-B
• Electrical Connection: 6 + PE
• Onboard Electronics: Yes
• Supply Voltage: 18–30 VDC
• Maximum Current Consumption: 2.0 A
• Protection: IP65 with correctly installed standard connector
• Seal: NBR
• Permitted Viscosity: 20–400 cSt
• Recommended Viscosity: 30–80 cSt
• Filtration: ISO 4406 18/16/13
• Leakage: approximately 100 ml/min at 100 bar
• Step Response: approximately 50 ms at 100% step
• Hysteresis: <5%
• Weight: approximately 9.3 kg
• Displacement: Not applicable
• Rotational Speed: Not applicable

Parker’s official D*1FB technical manual confirms the size, pressure, pilot-pressure, flow, viscosity, filtration, response, OBE and electrical characteristics above.

Key Technical Advantages

Pilot-Operated High-Flow Architecture

The D31FB uses pilot operation to control the main stage, providing a practical architecture for relatively high hydraulic flow while maintaining stable proportional behavior.

75 L/min Flow Configuration

The C flow code corresponds to 75 L/min for D31FB at Δp = 5 bar per metering edge. This must not be confused with the higher D31FB flow codes.

Controlled Pilot Pressure

Parker specifies a minimum pilot pressure of 30 bar plus T/Y pressure, with optimum dynamic performance around 50 bar. Pilot pressure stability is therefore a key factor during commissioning.

Integrated Digital Electronics

The OBE electronics are integrated into a robust housing and support parameter access through the Parker RS232/ProPxD system.

Progressive Flow Characteristics

Parker specifies progressive flow characteristics for sensitive flow adjustment, making the D31FB suitable for controlled acceleration, deceleration and hydraulic motion applications.

Application Areas

• Hydraulic Presses
• Machine Tools
• Metal Forming Equipment
• Industrial Automation
• Hydraulic Motion Systems
• Position and Velocity Control
• Hydraulic Test Equipment
• Plastic Processing Machinery
• High-Flow Industrial Hydraulic Systems

Expert Maintenance Tips

Verify Pilot Pressure First

Because the D31FB is pilot operated, troubleshooting should include:

• Pilot supply pressure
• T/Y back pressure
• Pilot filter condition
• Pilot orifice condition
• Pilot contamination

Verify the 18–30 VDC OBE Supply

Parker specifies an 18–30 VDC supply for D*1FB OBE valves with less than 5% effective ripple and no damaging surge.

Maintain ISO 4406 18/16/13 Cleanliness

Pilot-operated proportional valves require clean hydraulic oil to prevent pilot-stage sticking, spool response delays and increased leakage.

Perform Dynamic Testing

After installation, verify:

• Neutral response
• Positive and negative command
• Pilot pressure
• A/B flow direction
• Spool return
• Leakage
• OBE command response

Match the NBR Seal Configuration

The complete model uses NBR seals. Verify compatibility before using the valve with unusual hydraulic fluids or elevated temperatures.