Danfoss Series 45 Axial Piston Open Circuit Pumps

Danfoss Series 45 is a complete family of high performance variable displacement, axial piston pumps. Each frame is designed to exceed the demanding work function requirements of the mobile equipment marketplace. Each frame within the Series 45 family is uniquely designed to optimize performance, size, and cost. 

High Performance

• Displacements from 25 cm³ - 147 cm³ [1.53 - 8.97 in3/rev]
• Speeds up to 3600 rpm
• Pressures up to 310 bar [4495 psi]
• Variety of control system options including load sensing and pressure compensated

Latest Technology

• Customer-driven using quality function deployment (QFD) and design for manufacturability (DFM) techniques
• Optimized design maximizes efficiency and quiet operation
• Computer-modeled castings to optimize inlet conditions for maximum pump speed
• Compact package size minimizing installation space requirements
• Heavy-duty tapered roller bearings for long life
• Single piece rigid housing to reduce noise and leak paths
• Integrated controls for high speed response and system stability

Reliability

• Designed to rigorous standards
• Proven in both laboratory and field
• Manufactured to rigid quality standards
• Long service life
• Significantly fewer parts
• No gasket joints
• Robust input shaft bearings to handle large external shaft loads
• Integrated gauge ports for monitoring operating conditions

Benefits:

Reduced Installation Costs

• Through-drive capability for multi-circuit systems
• Range of mounting flanges, shafts and porting options for ease of installation
• Compact size minimizes installation space requirements
• Help meet engine emission standards
• Reduce engine size by managing power usage more effectively

Reduce Operating Costs

• Optimize machine power usage to maximize fuel economy
• Simple design reduces service requirements
• Heavy duty taper roller shaft bearings provide long service life

Increased Customer Satisfaction

• Reduced noise for operator comfort
• High performance increases productivity

Reduced Heat Load on Cooling System

• High efficiency reduces hydraulic heat generation
• Allows for smaller cooling packages

Typical applications

• Cranes
• Telescopic handlers
• Forklift trucks
• Wheel loaders
• Sweepers
• Backhoe loaders
• Forestry and agricultural machinery
• Fan drives
• Paving Machines
• Mining Equipment
• Mowers
• Dozers
• Drilling Machines
• Mini-Excavators
• Other Applications

The Series 45 product family

Basic units

The series 45 family of open circuit, variable piston pumps, offers a range of displacements from 25 to 147 cm³/rev [1.53 to 8.97 in3/rev]. With maximum speeds up to 3600 rpm and continuous operating pressures up to 310 bar [4495 psi], product selection is easily tailored to the flow and pressure requirements of individual applications.

The pump receives fluid directly from the reservoir through the inlet line. A screen in the inlet line protects the pump from large contaminants. The pump outlet feeds directional control valves such as PVG-32’s, hydraulic integrated circuits (HIC), and other types of control valves. The PVG valve directs pump flow to cylinders, motors and other work functions. A heat exchanger cools the fluid returning from the valve. A filter cleans the fluid before it returns to the reservoir. Flow in the circuit determines the speed of the actuators. The position of the PVG valve determines the flow demand. A hydraulic pressure signal (LS signal) communicates demand to the pump control. The pump control monitors the pressure differential between pump outlet and the LS signal, and regulates servo pressure to control the swashplate angle. Swashplate angle determines pump flow. Actuator load determines system pressure. The pump control monitors system pressure and will decrease the swashplate angle to reduce flow if system pressure reaches the PC setting. A secondary system relief valve in the PVG valve acts as a back-up to control system pressure.

To enquire about Danfoss Series 45 Axial Piston Pumps and for further technical help / assistance, please call the Technical Team on 01709 821002.

You can also view the Danfoss Series 45 Axial Piston Pumps Technical Data Sheet at: http://files.danfoss.com/documents/520l0519.pdf