R901278156 DREE10-6X/200YG24K31F1M Proportional relief valve German Rexroth hydraulic valve
|
Parameter |
Specification |
|---|---|
|
Order Number |
R901278156 |
|
Model |
DREE10-6X/200YG24K31F1M |
|
Type |
Pilot-operated proportional pressure reducing valve (2-way, B→A) |
|
Function |
Reduces inlet pressure (B) to controlled secondary pressure (A); excess flow internally drained |
|
Nominal Size |
NG10 (CETOP 5, Size 10) |
|
Max. Operating Pressure |
Port A & B: 315 bar |
|
Adjustable Pressure Range |
~2 – 200 bar (Electrically proportional, 4–20mA) |
|
Max. Flow Capacity |
200 L/min |
|
Pilot Flow Consumption |
Approx. 0.8 L/min (Internal pilot supply) |
|
Valve Design |
Pilot-operated spool valve, with integrated electronics (OBE) |
|
Supply Voltage |
24V DC (G24) |
|
Control Signal |
4 – 20 mA (F1) |
|
Electrical Connector |
6-pin + PE (K31) per DIN EN 175201-804 |
|
Special Features |
Integrated electronics (OBE), External pilot drain (Y), No maximum pressure limiter, No check valve |
|
Mounting Interface |
ISO 5781-AG-06-2-A (NG10 subplate) |
|
Seal Material |
NBR (M) |
|
Suitable Media |
Mineral oils (HL, HLP), HLP-D, HVLP, HFC fluids |
|
Media Temperature |
-20°C to +80°C |
|
Viscosity Range |
15 – 380 mm²/s (recommended 30–46 mm²/s) |
|
Ambient Temperature |
-20°C to +50°C (electronics) |
|
Cleanliness Requirement |
ISO 4406 20/18/15 or better |
|
Control Performance |
Hysteresis ≤ ±3.5 %, Repeat accuracy < ±2 % |
|
Weight |
Approx. 4.8 kg |
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FAQ:
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Integrated Electronics (OBE)
The "E" in DREE confirms On-Board Electronics (OBE). This means the valve contains its own amplifier. You supply 24V DC power and a 4–20 mA command signal directly to the valve's K31 connector. This simplifies wiring and eliminates the need for an external VT-VSPA amplifier.
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4–20 mA Control Signal (F1)
The "F1" suffix indicates the control input is a 4–20 mA current signal. This is different from the common 0–10 V variant (A1) and is often preferred for industrial applications due to its noise immunity over long cable runs.
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Pressure Rating & Flow (200 bar / 200 L/min)
The "200" denotes the maximum electrically adjustable reduced pressure at port A. This is a high-flow variant (max flow 200 L/min), suitable for large actuator circuits or secondary pressure control in high-power systems.
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External Pilot Drain (Y) & No Maximum Pressure Limiter
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"Y": The pilot control oil must be drained externally via port Y. This port must be connected directly to the tank with minimal backpressure. High backpressure at Y will cause inaccurate pressure regulation.
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No "M" after "200Y": The absence of an "M" code (e.g., compared to 200YMG24) indicates that this valve does not have a mechanical maximum pressure limiter. The maximum pressure is solely controlled by the electronics.
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Critical Installation Notes
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Port Y Drain: Must be piped separately to tank with a line diameter ≥ 5 mm and length < 2.5 m to avoid backpressure issues.
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Zero Signal Pressure: With a 4 mA command signal (or 0 V equivalent), the valve maintains a minimum pressure of approximately 2 bar at port A.
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Subplate: Requires an NG10 subplate according to ISO 5781-AG-06-2-A (e.g., Rexroth RE 45062 series).
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Correction: Your description mentioned "proportional relief valve", but this model is specifically a proportional pressure reducing valve. It controls the downstream (A-port) pressure, not the system relief pressure.
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