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Load-Sense Pressure Compensated Valve with Flow-Sharing (Post-Compensated) 3rd Generation post-compensated valve Target Launch – October 2006

Specifications Flows Pump input up to 60 GPM Work sections up to 50 GPM Pressure 5000 PSI Sectional construction Max. porting Inlet SAE 16 top and side Work SAE 12 Outlet SAE 16 top and SAE 20 side

Model Logic V = valve P = lspc (post-compensated) 170 = max work section flow in LPM Remember the VO40: O = open center 40 = max work section flow in plum

Key Features & Benefits Flow-sharing for improved productivity, safety and operator comfort Load-sense pressure compensated for improved system efficiency and fuel savings Modular design enables better match between cost and value. Available with: Load-sense pressure compensated, with or without induced load protections Load-sense only Low loop pressure drops for reduced HP consumption Low pressure regeneration to solve cavitation problems of premature component failure and “spongy” operation

Key Market Drivers Improved machine controllability and productivity Horsepower utilization, due tier II and III engines Fuel cost

Target Markets Wheel loaders and dozers Cranes Launched to Deere September 2004 for J Series Loaders Cranes Forestry – loaders, feller-bunchers, harvesters, forwarders, skidders Refuse – side loaders Snow and ice Distribution

Competitors Post-Compensated Pre-Compensated Danfoss – PVG100 (new) Husco – SX180 (new) Rexroth – SX14? (have not seen in dist’n channel) Rexroth - M4-15 (120 lpm out of work section) Pre-Compensated MP18 and MP22 (being discontinued; Wooster closing)

Flow-Sharing Adjusts to a pump over-demand conditions by reducing the flow to the selected functions, while maintaining the speed relationship between those functions The benefit - the operator can maintain the control of the machine The result - increased productivity, improved safety and operator comfort

Flow-Sharing Example #1

Flow-Sharing - Example #1 Full pump flow is 40 GPM, but operator wants 46 GPM Work section flows at full pump displacement of 40 GPM Operator wants 40 GPM from two work sections But now operator wants 46 GPM Only 40 GPM available, so valve goes into over-demand and divides the pump flow accordingly

Flow-Sharing - Example #2

Flow-Sharing - Example #2 Engine RPM decreases flow from 40 GPM to 30 GPM Work section flows at full pump displacement of 40 GPM Operator wants 40 GPM from two work sections Engine rpm’s drop so max pump flow is 30 GPM; valve divides the flow accordingly

Improved Efficiency of PCLS 10 20 30 40 50 60 500 1000 1500 2000 2500 3000 3500 Pressure F l o w Power consumed by function Wasted power L.S. system

Improved Efficiency of PCLS “A big reason for the change by Deere was mounting fuel costs. The pressure compensated load-sensing variable displacement system is a lot more fuel efficient than the open-center system, depending on operation, by as much as 30, 40, or even 50% better,” says Anders Lindstrom, Senior Systems Engineer with Parker Hannifin. “With the fuel savings I get on two of my 437Cs, I can make the payment on one.”

Modular Design Offers Three Circuit Options Induced load/ transition ck Compensator 2. Load-sense pressure scompensated (PCLS) w/o induced load protection 1. Load-sense pressure compensated (PCLS) with induced load protection Load sense ck for all circuit options located between the work ports!!!

Modular Design Offers Three Circuit Options Transition ck 3. Load-sense only Load sense ck for all circuit options located between the work ports !!!

Circuit – PCLS with Induced Load Protection Pressure compensated load-sense (PCLS) w/ reverse flow check

Circuit – PCLS without Induced Load Protection Pressure compensated load-sense (PCLS) w/o reverse flow check

Load-sense valve circuit Circuit – LS only Load-sense valve circuit

Low Loop Pressure Drop Ports A/B - tank

Spool Options Types Flows 3 way cylinder and motor 4 position float Flows Flow limited at full stroke and 250 PSI margin GPM 8, 16, 24, 32, 45 Additional flow limitation can be achieved with spool stroke limiters for ports A or B or both. Applies to hydraulic remote and solenoid operated. Not flow limited Another spool available that falls off the notch at full stroke and will try to output the full pump flow

Inlet Options

Inlet Options

Outlet Options

Low Pressure Regeneration Addresses cavitation Cavitation wreaks havoc on hydraulic components and results in spongy machine operation During valve operation, the valve will sense if a function is cavitating and will force oil across anti-cavitation checks to fill void If there is still a void in the hydraulic loop, when spools returned to neutral – will keep pump on stroke until a specified pressure level is achieved in the loop

Robust Endurance and fatigue testing: Inlet, work sections and outlet fatigue tested @ 6250 PSI and 3M cycles – NO FAILURES Load-sense checks endurance tested @ 5000 PSI and 2M cycles – NO FAILURES Transition/induced load check tested @ 5000 PSI and 1M cycles – NO FAILURES

Performance Enhancement Meter-out control can increase P-A/B pressure drop, when opposite port energized Work section body lengthened to ensure that pressure drop P/A-B not affected when meter-out control required Port B Tank

Performance Enhancement 4-position float work section When work section is in the float position, traditional design will draw oil A and B tank cores VP170 design can draw oil from: Tank cores of ports A and B Return flow from port B This improves float down time and addresses potential cavitation

Additional Benefits Fly cut lands each critical area (10) means consistent metering from valve to valve Uses same spool positioners as VA20 and PC25 — reduces cost, risk and improves delivery Uses same port accessories as FIVE other valve series –– reduces cost, risk and improves delivery Spool stroke of .406" longest in industry — this means more metering vs. spool stroke One solenoid used for on/off and proportional applications

Summary Pressures to 5000 PSI Flow range is 8-55 gpm out of the work port Flow-sharing Circuit options – load-sense pressure compensated or load-sense Optional induced load protection Optional low pressure regen and void filling scheme Improved filling scheme during float position (4 position float work section) Flexible, compact and cost effective EH package Symmetrical spool for easy conversion to right or left-handed sections Same spool positioners and port accessories as open-center counterparts Stroke limiters available for hydraulic remote and solenoid operation Full complement of flow-limited spools available Easily serviceable — all checks located on top of work section

VP170 Product Launch Literature Product Catalog HY14-2006/US Overview Bulletin HY14-2006/US   Service Bulletin HY14-2006-M1/US Catalog CD HY14-2006/US Advertisement Product Bit News Release To order call 1-800-CPARKER

Hydraulic Valve Solutions For Mobile & Truck Applications http://www.parker.com/hydraulicvalve Complete product information Applications Systems and subsystems

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