Valve Actuators enable precision load-handling.

Press Release Summary:

Suited for off-highway mobile industry, PVE Series 4 electric proportional actuation modules enable multiple functions to be performed simultaneously by delivering exact oil flow and pressure needed for each motion. Digital PVED module allows for control scheme, including advanced safety and diagnostic functions, via ISOBUS CAN protocol. It also features automatic fault monitoring, compensation for system induced flow forces, and directional indication.

Original Press Release:

Sauer-Danfoss Builds On Proportional Valve Heritage Innovative New Modules Enable Precision Load-Handling

AMES, IOWA, USA - SAUER-DANFOSS INC. (NYSE: SHS; FSE: SAR) Sauer-Danfoss has launched PVE Series 4 - the next generation of electric, proportional valve actuators for the off-highway mobile industry. Replacing the existing Series 2 and 3 actuators, PVE Series 4 is a line of sophisticated, electric actuation modules providing fast operation, maximum flexibility, and a high level of safety. Part of the PVG 32 family, they are particularly useful when the machine requires precision, regulated load pressure and optimal machine performance.

They enable multiple functions to be performed simultaneously, delivering the exact oil flow and pressure needed for each motion. Typical applications include tractors, backhoe loaders, telehandlers, truck-mounted cranes, forestry machinery and specialty vehicles.

The modules make it possible to build a valve assembly to meet your exact requirements, and the compact dimensions remain unchanged, whatever combination is specified. Load sensing valves, in general, also consume less power, leaving horsepower for other work, including emission control. Now, further development of the PVG 32 series has extended the application range to tractors.

PVE Series 4 offers the latest in actuator technology. New features include a redesigned solenoid valve that allows faster operation, a softer potting material for maximum water and humidity resistance, and enhanced electro-magnetic compatibility that provides protection from external interference up to 100 volts/meter. To ensure maximum product quality, every finished PVE module is submitted to a fully automated start-up/burn-in test.

PVED makes valve control easy
Newest to the PVE Series 4 line is a digital module, PVED, that allows for a control scheme including advanced safety and diagnostic functions via ISOBUS CAN protocol. The simplified wiring scheme has three looped wires versus several discreet wires, enabling a design engineer to integrate more safety systems. It also features automatic fault monitoring, compensation for system induced flow forces, as well as advanced directional indication for maximum safety and controllability.

Having pioneered the first electric actuators in the early 1970s, Sauer-Danfoss has standardized electronic valve protocol, and now offers more than 50 different versions, thereby providing OEMs with a very high level of flexibility.

"We put a lot of failure mode logic into the system, because CANBUS allows you to transmit and distribute that logic on the network in a simplified manner," said Ian MacLeod, Product Portfolio Manager. "This level of accuracy is a major benefit in an electrohydraulic valve, and for servicing, you just replace a module that is already calibrated from the factory."

PVBZ - Low-leakage valve module
As manufacturers move toward more integrated hydraulic system designs, Sauer-Danfoss is building upon its existing technology to create another new actuator concept designed to meet new requirements, including those for aerial lifts, tractors, municipal vehicles, harvesters and sweepers. The new PVBZ, also in the PVG 32 family, virtually eliminates leakage from the work port into the tank cavity of the valve. The design integrates pilot operated check valves into the control valve body to ensure machine implements stay in the desired position - a feature that helps enhance operator comfort and increase productivity. The integrated check valves eliminate the need for an external low-leakage valve connection, thereby easing installation work and helping reduce overall system costs. Standard thermo relief valve and spool options are also integrated into the system.

"The PVBZ technology is a big advancement that we developed in 2000 for agriculture and construction markets to reduce the work port leakage on backhoes and other machines that require load holding," said MacLeod. "Hitch valves based on the PVBZ module have been developed to enable precise control of tractor implements."

MacLeod says PVBZ features a new housing but utilizes common hardware standard with PVG 32. In addition to virtually no leakage, the advantages of PVBZ for OEMs are that it minimizes the number of parts they have to order, store and keep track of, reduces installation time and saves money. For the end user, it improves operator comfort and simplifies field service, and Sauer-Danfoss technical support is readily available.

Series 4 actuators and PVBZ valve modules are some of the latest additions to Sauer-Danfoss' comprehensive range of hydraulic load-sensing valve products. They are produced on state-of-the-art assembly lines at Sauer-Danfoss facilities in Nordborg, Denmark and Easley, South Carolina, USA, that speed up time to market.

Sauer-Danfoss Inc. is a worldwide leader in the design, manufacture and sale of engineered hydraulic systems, components and electronics for use primarily in applications of mobile equipment. Sauer-Danfoss, with more than 7,000 employees worldwide and revenue of more than $1 billion, has sales, manufacturing and engineering capabilities in Europe, the Americas and the Asia-Pacific region. The company's executive offices are located near Chicago in Lincolnshire, Illinois. More details online at

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