Bosch Rexroth | PGH4-3X050RR11VU2
PGH4-3X/050RR11VU2
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The PGH4-3X/050RR11VU2 gear pump belongs to the PGH High Pressure Gear Pumps series and is manufactured by Bosch Rexroth. It delivers 50.7 cm³ of fluid per revolution, supplying a fixed flow rate for hydraulic automation. The drive shaft uses a 25-4, 15-tooth, 16/32 DP, 30° spline so torque is transferred without slip under heavy load. Clockwise rotation matches power units that are plumbed for right-hand flow direction. Operating speed extends from 200 rpm to 3000 rpm, allowing slow actuator movement at low speed and full volume output at the top end. The SAE two-hole mounting flange in accordance with ISO 3019-1 lets the pump bolt directly to standard motor adapters, reducing installation work. A weight of 17 kg provides the rigidity needed for accurate shaft alignment while remaining light enough for single-person handling. The pump accepts hydraulic oil with viscosity down to 10 mm²/s, ensuring adequate lubrication during warm operating conditions.
The unit sustains a nominal pressure of 315 bar and tolerates intermittent peaks to 350 bar, enabling it to drive cylinders and motors in high-duty circuits without overstress. Absolute inlet pressure may drop to 0.8 bar yet must not exceed 2 bar, a margin that prevents cavitation while avoiding seal overload. Fluid temperature can range from −10 °C to 80 °C when HLP oil is used, so the pump remains functional during cold starts and continuous high-temperature service. Maximum permissible viscosity of 300 mm²/s allows the pump to prime thicker oil during winter or initial startup. FKM seals resist elevated temperature and mineral oil additives, maintaining tightness throughout extended service life.
Technical Specifications
Displacement
50.7 cm³/rev
Inlet Pressure Max (abs)
2 bar
Inlet Pressure Min (abs)
0.8 bar
Max Fluid Temp (hlp)
80 °C
Max Intermittent Pressure (hlp)
350 bar
Max Speed
3000 rpm
Min Fluid Temp (hlp)
-10 °C
Min Speed
200 rpm
Mounting Flange
SAE 2-Hole (ISO 3019-1)
Nominal Pressure (hlp)
315 bar
Rotation
Clockwise
Seals
FKM
Shaft Spline
25-4, 15T 16/32 DP 30°
Viscosity Max
300 mm²/s
Viscosity Min
10 mm²/s
Weight
17 kg
1620 Old Apex Road
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