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The PGH4-3X/050RE11VU2 gear pump belongs to the PGH High Pressure Gear Pumps series and is manufactured by Bosch Rexroth. It serves as a fixed-displacement source of hydraulic flow in automation circuits that run at elevated pressure. The pump rotates clockwise, so system designers align motor orientation accordingly. A volumetric displacement of 50.7 cm³ per revolution establishes the basic flow rate produced at any given speed. The 25 mm j6 drive shaft is cylindrical in form E, enabling direct coupling to standard electric motors without custom adapters. When operated at 1450 rpm, 10 bar, and 30 cSt fluid, it delivers 72.8 l/min, providing reference data for sizing coolers and return lines. The nominal pressure rating of 315 bar defines the continuous operating limit for hydrostatic loads. Permitted speed ranges from 200 rpm to 3000 rpm, allowing slow creep or high-velocity actuator movement from the same unit. A mass moment of inertia of 0.00081 kg·m² reduces start-up torque requirements on the prime mover. The overall weight is 17 kg, so a single technician can position the pump during maintenance.
To cover short-term transients, the pump withstands intermittent pressure up to 350 bar, letting cylinders overcome brief peak loads without relief valve chatter. A maximum flow capability of 150 l/min keeps volumetric efficiency viable at elevated speeds. The inlet side must see an absolute pressure of at least 0.8 bar to prevent cavitation, so reservoir placement and line sizing must maintain adequate head. A two-hole ISO 3019-1 101-2 mounting flange provides a standardized footprint for quick replacement in modular manifolds. High-pressure fluid exits through a 1-inch port tailored to the series rating, while the suction connection uses a 2-inch port typical of the standard line, minimizing velocity at the inlet. Together, these port sizes balance pressure capability with low suction losses and simplify hose selection.
Direction Of Rotation
Clockwise
Displacement
50.7 cm³/rev
Drive Shaft Diameter
25 mm (j6)
Drive Shaft Form
Cylindrical (E)
Flow (1450 Rpm, 10 Bar, 30 Cst)
72.8 l/min
Intermittent Pressure (hlp)
350 bar
Mass Moment Of Inertia
0.00081 kg·m²
Max Flow
150 l/min
Min Inlet Pressure (abs.)
0.8 bar
Mounting Flange
2-Hole (ISO 3019-1 101-2)
Nominal Pressure (hlp)
315 bar
Pressure Port Size
1 in (High-Pressure Series)
Speed Max
3000 rpm
Speed Min
200 rpm
Suction Port Size
2 in (Standard Series)
Weight
17 kg
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