2520VQ17C11-11CC20 | Vickers Double Vane Pump 25.5 GPM

Product Overview

The 2520VQ17C11-11CC20 is a tandem fixed-displacement double vane pump from the Vickers (now Danfoss) 2520VQ series. Featuring advanced Intra-Vane technology, this series delivers high flow rates and pressures from a compact design, offering exceptional versatility for both industrial and mobile hydraulic applications.

Manufactured to strict Vickers 2520VQ series OEM standards, our pump achieves 100% interchangeability with original equipment in mounting dimensions, SAE B 2-bolt flange interface, and performance characteristics. As a tandem pump, the 2520VQ17C11-11CC20 integrates two pump cartridges within a single housing, driven by a common input shaft to supply two independent hydraulic circuits simultaneously. This design significantly simplifies hydraulic system architecture and saves valuable installation space. Our products achieve 100% interchangeability in materials, machining precision, seals, and performance, with every unit undergoing 100% factory testing under simulated operating conditions.

Model Code Breakdown (for 2520VQ17C11-11CC20)：

• 2520VQ — Pump series (Vickers VQ series double pump, 2520 frame size)

• 17 — Shaft end displacement code (17 GPM @ 1,200 r/min)

• C — Shaft end port position

• 11 — Cover end displacement code (11 GPM @ 1,200 r/min)

• 11 — Cover end port position

• C — Configuration code

• C — Seal and design code

• 20 — Design code (Design Code 20)

Core 2520VQ Series Models Covered:

• 2520VQ17C11-11CC20

• 2520VQ17A8-11BA20

• 2520VQ17A5-11AA20

• 2520VQ21A14-175CC-20L

• 2520VQ17A14-86CC

Technical Specifications 

General Specifications (2520VQ Series)

Series Name

• Vickers 2520VQ Series Tandem Fixed Displacement Vane Pump

Pump Type

• Tandem fixed displacement vane pump

Technology

• Intra-Vane (integral vane) technology

Mounting Flange

• SAE B 2-bolt flange

Direction of Rotation

• Right hand / Clockwise (viewed from shaft end)

Shaft Type

• 13-tooth 16/32 splined shaft, 7/8″ diameter

Seal Material

• Standard: Buna-N (nitrile rubber)

Maximum Operating Pressure

• 210 bar (3,000 PSI)

Model: 2520VQ17C11-11CC20

Part Number

• 576253-3

Shaft End Displacement

• 3.4 in³/rev (approx. 55.7 cm³/rev)

Cover End Displacement

• 2.2 in³/rev (approx. 36.1 cm³/rev)

Shaft End Flow

• 17 USgpm @ 1,200 r/min

• 25.5 USgpm @ 1,800 r/min

Cover End Flow

• 11 USgpm @ 1,200 r/min

• 16.5 USgpm @ 1,800 r/min

Maximum Operating Pressure

• 210 bar (3,000 PSI)

Mounting Type

• Flange mount

Shaft Type

• 13-tooth splined shaft, 7/8″ diameter

Weight

• Approx. 20.4 kg (45.0 lb)

Model: 2520VQ17A8-11BA20

Part Number

• 421596-G

Shaft End Displacement

• 3.4 in³/rev (approx. 55.7 cm³/rev)

Cover End Displacement

• 1.7 in³/rev (approx. 27.9 cm³/rev)

Shaft End Flow

• 17 USgpm @ 1,200 r/min

• 25.5 USgpm @ 1,800 r/min

Cover End Flow

• 8 USgpm @ 1,200 r/min

• 12 USgpm @ 1,800 r/min

Maximum Operating Pressure

• 210 bar (3,000 PSI)

Mounting Type

• Flange mount

Shaft Type

• 13-tooth splined shaft, 7/8″ diameter

Weight

• Approx. 20.4 kg (45.0 lb)

Model: 2520VQ17A5-11AA20

Part Number

• 430231-1

Shaft End Displacement

• 3.4 in³/rev (approx. 55.7 cm³/rev)

Cover End Displacement

• 1.1 in³/rev (approx. 18.0 cm³/rev)

Shaft End Flow

• 17 USgpm @ 1,200 r/min

• 25.5 USgpm @ 1,800 r/min

Cover End Flow

• 5 USgpm @ 1,200 r/min

• 7.5 USgpm @ 1,800 r/min

Maximum Operating Pressure

• 210 bar (3,000 PSI)

Mounting Type

• Flange mount

Shaft Type

• 13-tooth splined shaft, 7/8″ diameter

Weight

• Approx. 20.4 kg (45.0 lb)

2520VQ Series Available Displacement Codes (Shaft/Cover End)

• 10 GPM, 12 GPM, 14 GPM, 17 GPM, 19 GPM, 21 GPM

2520V Series Same-Platform Models (Partial List)

• 2520V12A2-1AA-22-R, 2520V12A5-1AA-22-R, 2520V12A8-1AD-22-R

Key Technical Advantages

1. Advanced Intra-Vane Technology
The 2520VQ series employs Vickers’ patented Intra-Vane technology, where each primary vane contains a secondary intra-vane that uses centrifugal force and hydraulic pressure to extend the primary vane, ensuring intimate contact with the cam ring surface. This design significantly reduces contact stress between vanes and the cam ring, minimizing friction and wear while extending pump service life and enhancing application versatility.

2. Tandem Pump Design — Two Circuits, One Drive
The 2520VQ series features a tandem pump design that integrates two independent pump cartridges within a single housing, driven by a common input shaft. This enables simultaneous supply to two independent hydraulic circuits without the need for two separate pumps, significantly saving installation space, simplifying plumbing, and reducing system costs.

3. Drop-in Interchangeability
Manufactured to exacting Vickers 2520VQ series OEM standards, our pump is fully interchangeable with original equipment in mounting dimensions, SAE B 2-bolt flange interface, port configurations, and performance characteristics. No modifications to existing hydraulic piping or mounting brackets are required.

4. 100% Simulated Operating Condition Testing
Every pump undergoes comprehensive factory performance testing under simulated operating conditions, covering rated pressure, peak pressure, flow characteristics, and temperature rise. This ensures the product is ready for full-load operation immediately upon installation, eliminating early failure risks.

5. Compact Design with High Power Density
Intra-vane pumps deliver high flow rates and pressures from a small, compact design, offering an excellent power-to-weight ratio. The SAE B 2-bolt flange mounting and compact footprint make this pump ideal for space-constrained applications.

6. Balanced Hydraulic Structure with Low Noise Operation
The 2520VQ series features a balanced hydraulic internal vane structure and ten-vane design for higher pressure capability. The side plates employ a floating structure that automatically compensates for end clearance, ensuring high volumetric efficiency even under high pressure. Side plates are manufactured from bimetal material for enhanced durability.

Application Areas

• Injection Molding Machines — Tandem design supplies separate clamp and injection hydraulic circuits

• Die Casting Machines — High-pressure, high-reliability hydraulic systems

• Machine Tool Hydraulic Systems — Hydraulic power units for metal cutting machines and machining centers

• Metallurgical Equipment — Hydraulic systems for rolling mills and continuous casting equipment

• Construction Equipment — Hydraulic systems for excavators, loaders, and related machinery

• Material Handling Equipment — Hydraulic systems for forklifts and cranes

• Power Take-Off (PTO) Units — Mobile on-board hydraulic power units

Expert Maintenance Tips

1. Installation Guidelines

• Verify pump rotation direction matches the drive motor (right hand/clockwise, viewed from shaft end) before installation

• Mounting flange is SAE B 2-bolt standard; ensure mounting bolt torque meets specifications

• Shaft is 13-tooth 16/32 splined, 7/8″ diameter; ensure coupling matches

• The two ports have different inlet/outlet configurations; carefully verify line identification during installation

2. Hydraulic Fluid Selection and Contamination Control

• Recommended fluid: ISO VG 32 or 46 anti-wear hydraulic oil

• Standard seals are Buna-N (nitrile rubber), suitable for mineral oil and anti-wear hydraulic fluids

• System cleanliness should be maintained at NAS 1638 Class 9 or better; install return line filtration (≤ 10 μm absolute)

• Both pump cartridges share a common suction port; ensure suction line is adequately sized to prevent cavitation

3. Start-up and Operation

• Pre-lubricate the pump by filling the drain port with clean hydraulic fluid before first start

• Perform 2-3 low-speed jogging cycles under no-load conditions to purge air from the system before applying load

• Monitor loads on both circuits separately; ensure both remain within design pressure limits (210 bar / 3,000 PSI maximum)

4. Scheduled Maintenance

• Replace hydraulic fluid and filters every 2,000 operating hours or annually, whichever comes first

• Regularly monitor pump housing temperature (normal temperature rise ≤ 40°C; maximum housing temperature ≤ 80°C)

• Investigate flow reduction, increased pressure fluctuation, or abnormal noise promptly; inspect cartridge components for wear

• The two cartridges in a tandem pump can be replaced independently without replacing the entire pump

5. Spare Parts Recommendation

• Stock cartridge kits as critical spare parts; 2520VQ series cartridges are interchangeable within the same housing

• Maintain companion seal kit inventory

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