VT-DFPE-A-22 Rexroth Proportional Pressure Valve NG6 315 bar

Product Overview

The VT-DFPE-A-22/G24K0/0A1V/V-014 (Material No. R900720216) is a pilot-operated proportional pressure valve from Bosch Rexroth’s VT-DFPE series, belonging to the product line featuring integrated analog on-board electronics (OBE). The valve is based on the 3DREP 6 pilot-operated proportional pressure valve architecture and mounts via subplate according to ISO 4401-03-02-0-05 at nominal size NG6 (Cetop 3), primarily used to reduce system pressure in port P1.

The core function of the VT-DFPE-A-22 is to process analog command signals from a PLC or controller through the integrated electronics to drive a proportional solenoid, achieving precise and continuous regulation of pressure at port P1. The integrated analog electronics (OBE) compares the specified command value to the actual pressure value; in case of control deviations, the solenoid drive current is dynamically corrected, making the output pressure proportional to the command signal. The valve serves as a pilot control valve for SY(H)DFEE electro-hydraulic control systems, enabling precise regulation of pump output pressure in combination with variable displacement pumps.

Model code breakdown: VT-DFPE = pilot-operated proportional pressure valve with integrated analog electronics; A = spool groove configuration; 22 = 2X component series; G24 = DC 24 V supply; K0 = connector configuration (DIN EN 175301-803, without plug); 0A1V = differential ±10 V voltage input signal; V = FKM seals.

The valve uses a proportional solenoid for precise control, managed by the onboard amplifier. This specific variant operates on a 24V DC supply and accepts a differential command signal input of ±10V, making it suitable for sophisticated hydraulic control systems requiring accurate pressure regulation.

As a drop-in replacement, the valve is fully compatible with the OEM Rexroth specification in mounting interface, electrical connection, and performance characteristics. Every unit undergoes 100% simulation-based testing prior to shipment, covering null stability, pressure linearity, step response, and internal leakage.

Technical Specifications

All parameters below are based on verified supplier technical pages (Echuan Hydraulic product data) and industry-standard specifications:

• Complete Model: VT-DFPE-A-22/G24K0/0A1V/V-014

• Material Number (MNR): R900720216

• Brand: Bosch Rexroth

• Product Series: VT-DFPE series, component series 2X (valve), A (electronics)

• Product Type: Pilot-operated proportional pressure valve (based on 3DREP 6), with integrated analog electronics (OBE)

• Spool Function: Proportional pressure reducing valve, for pressure regulation in port P1

• Nominal Size: NG6 (ISO 4401-03-02-0-05 / Cetop 3)

• Mounting: Subplate mounting

• Max Operating Pressure (Port P): 315 bar

• Maximum Flow: 15 L/min

• Control Electronics: Integrated analog on-board electronics (OBE) VT-DFPE

• Supply Voltage: DC 24 V (G24)

• Command Value Input: Differential amplifier input ±10 V (A1V)

• Electrical Connector: Plug-in connector DIN EN 175301-803, without plug (K0)

• Hydraulic Fluid: Mineral oil (HL, HLP) per DIN 51524

• Fluid Temperature Range: -20 °C to +70 °C

• Seal Material: FKM (Viton)

• Protection Class: IP65 (when mated plug connected)

• Weight: Approx. 2.25 kg

Note: Specifications are based on verified supplier technical pages (Echuan Hydraulic product data) and Bosch Rexroth official datasheet RE 29016. Model code breakdown: VT-DFPE = pilot-operated proportional pressure valve with integrated analog electronics; A = spool groove configuration; 22 = 2X component series; G24 = DC 24 V supply; K0 = connector configuration; 0A1V = differential ±10 V voltage input; V = FKM seals. The valve is based on the 3DREP 6 pilot-operated proportional pressure valve architecture. Always verify against the complete model code during selection.

Key Technical Advantages

1. Integrated Analog Electronics (OBE) — No External Amplifier Required

The VT-DFPE-A-22 integrates the analog control circuit board directly onto the valve body, factory-calibrated to enable operation with only a 24 V DC supply and ±10 V differential command signal — no external amplifier card or associated wiring required. The integrated electronics (OBE) compares the specified command value to the actual pressure value; in case of control deviations, the solenoid drive current is dynamically corrected, making output pressure proportional to the command signal. For standardized SY(H)DFEE variable pump system design and long-term maintenance, this integration directly reduces total cost of ownership.

2. Pilot-Operated Pressure Control Architecture for High-Precision Regulation

The valve employs a pilot-operated pressure control architecture based on the proven 3DREP 6 proportional pressure valve platform. The pilot stage is driven by a proportional solenoid, while the power stage uses pilot pressure to control the main spool, achieving precise and continuous regulation of system pressure at port P1. Compared with direct-operated pressure valves, the pilot-operated architecture offers superior pressure regulation accuracy and stability under high-pressure conditions, suitable for industrial hydraulic systems requiring stringent pressure control precision.

3. ±10V Differential Input with Strong Interference Immunity

The valve accepts ±10 V differential amplifier command signals. The differential input architecture provides strong common-mode interference rejection, suitable for industrial environments with high electromagnetic interference. The command signal maintains a well-defined linear relationship with output pressure, facilitating closed-loop control system tuning and optimization.

4. FKM Seals and IP65 Protection for Demanding Industrial Environments

FKM (Viton) seal material provides excellent resistance to mineral oil-based hydraulic media. The IP65 protection rating prevents dust ingress and water jet exposure from reaching internal electronics, maintaining reliable operation at elevated relative humidity. These environmental design features enable long-term stable operation in harsh industrial environments such as metallurgy and mining.

5. 100% Simulation-Based Testing and Drop-In Interchangeability

Every VT-DFPE-A-22 undergoes 100% simulation-based testing prior to shipment. Test protocols cover null stability, pressure linearity, step-response verification, and internal leakage detection. As a drop-in replacement, the valve is fully compatible with the OEM Rexroth specification in mounting dimensions (ISO 4401-03-02-0-05 interface), electrical interface (DIN EN 175301-803 connector), and performance characteristics, enabling direct replacement without hydraulic circuit or control wiring modification.

Application Areas

• SY(H)DFEE Variable Pump Control Systems: Standard pilot pressure control valve for precise pump output pressure regulation

• Injection Molding Machines: Closed-loop control of injection pressure and hold pressure for consistent part quality

• Die Casting Equipment: High-speed dynamic pressure regulation and real-time switching control

• Hydraulic Presses: Precision pressure control, force/position hybrid control

• Material Testing Systems: Pressure closed-loop control for electro-hydraulic servo loading systems

• Industrial Automation Lines: Integration with PLC for digital control of pressure valves

• Metallurgy & Mining Equipment: High pressure rating and IP65 protection suitable for harsh industrial environments

Expert Maintenance Tips

Pre-Installation Checks:

• Verify the manifold mounting surface conforms to ISO 4401-03-02-0-05 (NG6) standard; surface roughness Ra ≤ 0.8 μm

• Flush all piping with clean hydraulic fluid prior to installation; ensure system cleanliness reaches ISO 4406 18/16/13 or better

• Inspect FKM seals for damage and confirm compatibility with the hydraulic fluid in use

• Tighten mounting bolts in diagonal sequence to specified torque

Operational Maintenance:

• Use a 5–10 μm precision pressure filter, specified without bypass and equipped with a contamination indicator

• Recommended fluid: mineral oil (HL, HLP per DIN 51524); maintain operating viscosity within recommended range

• Maintain fluid temperature within -20 °C to +70 °C; avoid overheating that degrades fluid quality

• Periodically inspect the integrated electronics status indicators; confirm 24 V DC supply remains within allowable range

• Monitor null output pressure offset; significant increase indicates spool/sleeve wear or electronics anomaly

Troubleshooting Guide:

• Spool fails to actuate or responds abnormally: Check 24 V DC supply, verify ±10 V differential command signal reaches the valve correctly, confirm DIN EN 175301-803 connector engagement is reliable

• Null-point drift: After ruling out fluid contamination, verify electronics feedback signal integrity; check whether the spool is stuck due to contamination

• Insufficient output pressure: Confirm system supply pressure is within the 315 bar allowable range; check spool metering edges for partial blockage by contaminant particles

• Electronics alarm: Verify supply voltage is within normal range; check control signal line integrity