Vickers | 25VQ12A-11C20
25VQ12A 11C20
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The 25VQ12A 11C20 vane pump is manufactured by Vickers for the VQ Thru-Drive Vane Pumps series. Designed for hydraulic automation, it delivers oil to circuits while allowing a secondary pump to mount on the rear drive. The geometric displacement is 40.2 cm³ per revolution (2.45 in³/rev), which sets the fixed volume transferred each shaft turn. Under nominal conditions this displacement produces a SAE rated flow of 12 US gpm, supplying cylinders and motors with predictable throughput. The pump tolerates operating pressures up to 210 bar (3000 psi), so it can service medium-pressure mobile or industrial systems. Shaft speed may reach 2700 rpm, defining the maximum drive velocity before cavitation or heat rise. A right-hand clockwise rotation matches standard engine PTO directions, and ten vanes stabilize the flow and reduce pulsation. Inlet and outlet are connected through SAE four-bolt flanges, and the outlet port sits in line with the inlet to keep piping runs short and straight.
Installation details are equally defined. A flange mount with a single shaft seal fastens the housing and limits external leakage. A standard pilot interface aligns the pump to companion gearboxes without additional adapters. Fluid entering the unit must meet an ISO cleanliness level of 18/16/13 or cleaner so the vane tips and ring surfaces avoid abrasive wear. Handling is simplified because the assembly weighs 14.5 kg (32 lb), allowing one technician to lift it into position. Overall length is 208.53 mm (8.210 in), width is 174.50 mm (6.870 in), and height is 137.16 mm (5.400 in), giving a compact profile for crowded power packs. These dimensional limits, together with the mounting style, help the pump fit inside common engine bell housings and skid frames while maintaining proper shaft alignment.
Technical Specifications
Fluid Cleanliness (iso)
18/16/13 or cleaner
Geometric Displacement
40.2 cm3/rev (2.45 in3/rev)
Height
137.16 mm (5.400 in)
Length
208.53 mm (8.210 in)
Max Operating Pressure
210 bar (3000 psi)
Max Speed
2700 rpm
Mounting & Shaft Seal
Flange Mount (Single Seal)
Outlet Position
In Line With Inlet
Pilot
Standard Pilot
Port Connections
SAE 4-Bolt Flange (Inlet, Outlet)
Rotation
Right-Hand (CW)
Sae Rated Flow
12 USgpm
Vanes
10
Weight
14.5 kg (32 lb)
Width
174.50 mm (6.870 in)
1620 Old Apex Road
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