background image

Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic and
electronic components. We specialize in providing state-of-the-art technology and solutions
that excel in the harsh operating conditions of the mobile off-highway market. Building on
our extensive applications expertise, we work closely with our customers to ensure
exceptional performance for a broad range of off-highway vehicles.

We help OEMs around the world speed up system development, reduce costs and bring
vehicles to market faster.

Danfoss – Your Strongest Partner in Mobile Hydraulics.
Go to www.powersolutions.danfoss.com for further product information.

Wherever off-highway vehicles are at work, so is Danfoss. We offer expert worldwide support
for our customers, ensuring the best possible solutions for outstanding performance. And
with an extensive network of Global Service Partners, we also provide comprehensive global
service for all of our components.

Please contact the Danfoss Power Solution representative nearest you.

Local address:

Danfoss 

Power Solutions GmbH & Co. OHG

Krokamp 35

D-24539 Neumünster, Germany

Phone: +49 4321 871 0

Danfoss 

Power Solutions ApS

Nordborgvej 81

DK-6430 Nordborg, Denmark

Phone: +45 7488 2222

Danfoss 

Power Solutions (US) Company

2800 East 13th Street

Ames, IA 50010, USA

Phone: +1 515 239 6000

Danfoss 

Power Solutions Trading

(Shanghai) Co., Ltd.

Building #22, No. 1000 Jin Hai Rd

Jin Qiao, Pudong New District

Shanghai, China 201206

Phone: +86 21 3418 5200

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products

already on order provided that such alterations can be made without changes being necessary in specifications already agreed.

All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

©

 Danfoss | Feb 2017

AB00000079en-US0101

Products we offer:

Bent Axis Motors

Closed Circuit Axial Piston

Pumps and Motors

Displays

Electrohydraulic Power

Steering

Electrohydraulics

Hydraulic Power Steering

Integrated Systems

Joysticks and Control

Handles

Microcontrollers and

Software

Open Circuit Axial Piston

Pumps

Orbital Motors

PLUS+1

®

 GUIDE

Proportional Valves

Sensors

Steering

Transit Mixer Drives

Comatrol

www.comatrol.com
Turolla 

www.turollaocg.com
Hydro-Gear

www.hydro-gear.com
Daikin-Sauer-Danfoss

www.daikin-sauer-danfoss.com 

Summary of Contents for PVG 32

Page 1: ...Application Guide PVG 32 Using flow or pressure control spools powersolutions danfoss com...

Page 2: ...Revision history Table of revisions Date Changed Rev Feb 2017 First edition 0101 Application Guide Using flow or pressure control spools 2 Danfoss Feb 2017 AB00000079en US0101...

Page 3: ...uction of whole or part of the contents of this manual is prohibited The following notes are used to raise awareness of safety considerations W Warning Xxxxx Identifies information about practices or...

Page 4: ...ns Inertia in the system could lead to oscillations which will be damped when using PC spools In this document you can read about the hydraulic functionality and behavior of a PC spool compared to our...

Page 5: ...f the compensator The other side of the compensator is connected to the Pc pressure The Pc pressure will remain 7 bar higher than Pl This also means that flow out of the valve is always directly propo...

Page 6: ...y to keep the pressure drop across the main spool at the same level and follow the pressure oscillations from the actuator attached to the valve When the load pressure is changing the compensator will...

Page 7: ...manipulates the LS signal A pc Pl physical opening area of the spool as a function of its position Pl load pressure Pc manipulated LS pressure spring pressure Ql flow out of the valve The example in...

Page 8: ...e of the load and with variable deadband PC control to B port on page 8 illustrates a cut through PVB with PC control to one port PC control to B port Application Guide Using flow or pressure control...

Page 9: ...a constant pressure Pc The load pressure Pl is oscillating Over time the pressure drop across the main spool Pc minus Pl varies which leads to a variable flow The flow out Ql is also shown on the grap...

Page 10: ...lot pressure to open the CB valve on the B port The load is held by the CB valve and with the pressure build up on A port the opening of the CB valve is controlled PC is proportional to spool position...

Page 11: ...rk port while allowing a variable flow depending on changes in the work port load A situation in which PC spools are of great value is when you are lowering a load in an application that uses counterb...

Page 12: ...er Solutions ApS Nordborgvej 81 DK 6430 Nordborg Denmark Phone 45 7488 2222 Danfoss Power Solutions US Company 2800 East 13th Street Ames IA 50010 USA Phone 1 515 239 6000 Danfoss Power Solutions Trad...

Reviews: