Sauer Danfoss 90R 180 250 Series Piston Pump For Closed Circuit Systems

1,Product Overview

The Sauer Danfoss 90R Series is a high-pressure axial piston variable displacement pump specifically designed for closed-circuit systems. Known for its high power density, reliability, and compact design, this series is widely used in various mobile and industrial applications. The series offers multiple displacement options, with the 90R180 (180 cm³/rev) and 90R250 (250 cm³/rev) being two typical high-displacement models capable of meeting demanding high-pressure, high-flow requirements.

2,Key Features

. Advanced Technology & High Performance: The 90R series incorporates proven advanced technology to ensure high performance and reliability. Its design features parallel arranged axial pistons and slippers, and the displacement is varied by changing the piston stroke via a swashplate with a variable angle. The direction of the outlet flow changes with the direction of the swashplate, enabling the motor output shaft to switch between forward and reverse rotation.
. High Power Density & Compact Design: These pumps feature a compact design and light weight, achieving high power density, which helps optimize the spatial layout of the host machinery.
. Multiple Control Options: Various control methods are available, including manual, hydraulic, and electric controls (e.g., Electric Displacement Control - EDC), to meet specific system control requirements.
. Integrated Charge Pump & Auxiliary Functions: The pump includes an integrated charge pump that provides make-up fluid, cooling flow, and control pressure oil for the system. Multiple auxiliary mounting flanges are optionally available on the rear cover for tandem pump applications.
. Integrated Multi-Function Valve: The pump incorporates a Multi-Function Valve that combines the roles of a check valve, high-pressure relief valve, pressure limiting valve, and bypass valve, offering comprehensive system protection.

3,Technical Specifications

The table below lists key technical parameters for some models in the 90R series:

Parameter 90R180 90R250
Displacement 180 cm³/rev 250 cm³/rev
Rated Pressure 420 bar 420 bar
Maximum Pressure 480 bar 480 bar
Rated Speed 2600 min⁻¹ 2300 min⁻¹
Minimum Speed 500 min⁻¹ 500 min⁻¹
Theoretical Torque 2.87 Nm/bar 3.97 Nm/bar
Weight 136 kg 154 kg
Continuous Case Pressure 3 bar 3 bar
Main Line Min. Pressure 10 bar 10 bar

4,Application Fields

The 90R series hydraulic pumps are widely used in the following equipment:

 Construction Machinery: Rollers, pavers, excavators, etc.
 Building Machinery:  Concrete pump trucks, concrete mixer trucks, etc.
Mining Machinery:  Underground loaders, drilling rigs, etc.
Agricultural Machinery: Combine harvesters, etc.
Port and Marine Machinery:  Cranes, steering gears, etc.

5,Frequently Asked Questions(FAQ)

Q:what's package ?

A:our packing is neutral packing ,paper box or wooden box.

Q:what payment you can accept ?

A:/TT/western union/moneygram/alipay/ online payment

Q: have warranty ?

A: our all product have warranty half /one year,based on different products

Q: tested before shipping ?

A: yes ,tested each before shipping 

Company information

QUZHOU OUSTER HYDRAULIC Co., Ltd, founded in 2015 with more than 13 years export experience, specializes in procuring and selling hydraulic pumps and hydraulic pump parts.

Our main products include hydraulic pumps, hydraulic pump parts, hydraulic motors, gearboxes, and hydraulic valves. Our products have been exported to more than 68 countries worldwide.