Bosch Rexroth | SYHDFEE-1X250R-VZB25U99-0000-A0A1V
SYHDFEE-1X/250R-VZB25U99-0000-A0A1V
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The SYHDFEE-1X/250R-VZB25U99-0000-A0A1V hydraulic control unit belongs to the SYD Hydraulic Control Systems series and is produced by Bosch Rexroth. It is intended to regulate pressure and flow in automated hydraulic circuits. Clockwise shaft rotation aligns with right-hand drive trains, preventing coupling errors. A displacement of 250 cm³ per revolution establishes the theoretical flow rate for pump sizing, and at 1500 rpm the unit can deliver 375 l/min to high-volume lines. The allowable top speed of 1900 rpm defines the mechanical limit for the prime mover, while a minimum speed of 0 rpm permits static holding without damage. An operating pressure rating of 350 bar sets the maximum working load, and the power capability reaches 277 kW at that differential so motor output can be matched accurately. Electrical actuation requires a 24 V DC supply, and the control electronics draw a rated current of 0.6 A.
Inlet conditions must stay between 0.8 bar absolute and 30 bar to keep the suction side flooded without overstressing the housing. Internal leakage passages are restricted to 4 bar absolute, so return lines must remain low pressure to protect seals. The drive shaft tolerates up to 2782 Nm, enabling direct coupling to large electric motors, and the hydraulic section can generate 1391 Nm of torque at 350 bar for heavy rotary or linear loads. Radial bearing capacity is 2000 N, and axial thrust capacity is 1800 N, safeguarding the rotating group from belt tension or misaligned couplings. These mechanical limits allow the unit to maintain reliability under demanding service while meeting the specified performance targets.
Technical Specifications
Direction Of Rotation
Clockwise (shaft view)
Displacement
250 cm3
Max Axial Force
1800 N
Max Drive Torque
2782 Nm
Max Flow @ 1500 Rpm
375 l/min
Max Inlet Pressure
30.0 bar
Max Leakage Pressure (abs)
4 bar
Max Operating Pressure
350 bar
Max Power (Δp 350 Bar)
277 kW
Max Radial Force
2000 N
Max Speed (vg Max)
1900 rpm
Max Torque (Δp 350 Bar)
1391 Nm
Min Inlet Pressure (abs)
0.8 bar
Min Speed
0 rpm
Rated Current
0.6 A
Supply Voltage (nominal)
24 VDC
1620 Old Apex Road
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