2Parker is the global leader in motion and control technologies, partnering with its customers to increase their productivity and profitability.
3Load-Sense Pressure Compensated Valve with Flow-Sharing (Post-Compensated) 3rd Generation post-compensated valveTarget Launch – October 2006
4Specifications Flows Pump input up to 60 GPM Work sections up to 50 GPMPressure 5000 PSISectional constructionMax. portingInlet SAE 16 top and sideWork SAE 12Outlet SAE 16 top and SAE 20 side
5Model Logic V = valve P = lspc (post-compensated) 170 = max work section flow in LPMRemember the VO40:O = open center40 = max work section flow in plum
6Key Features & Benefits Flow-sharing for improved productivity, safety and operator comfortLoad-sense pressure compensated for improved system efficiency and fuel savingsModular design enables better match between cost and value. Available with:Load-sense pressure compensated, with or without induced load protectionsLoad-sense onlyLow loop pressure drops for reduced HP consumptionLow pressure regeneration to solve cavitation problems of premature component failure and “spongy” operation
7Key Market Drivers Improved machine controllability and productivity Horsepower utilization, due tier II and III enginesFuel cost
8Target Markets Wheel loaders and dozers Cranes Launched to Deere September 2004 for J Series LoadersCranesForestry – loaders, feller-bunchers, harvesters, forwarders, skiddersRefuse – side loadersSnow and iceDistribution
9Competitors 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-CompensatedMP18 and MP22 (being discontinued; Wooster closing)
10Flow-SharingAdjusts to a pump over-demand conditions by reducing the flow to the selected functions, while maintaining the speed relationship between those functionsThe benefit - the operator can maintain the control of the machineThe result - increased productivity, improved safety and operator comfort
12Flow-Sharing - Example #1 Full pump flow is 40 GPM, but operator wants 46 GPM Work section flows at full pump displacement of 40 GPMOperator wants 40 GPM from two work sectionsBut now operator wants 46 GPMOnly 40 GPM available, so valve goes into over-demand and divides the pump flow accordingly
14Flow-Sharing - Example #2 Engine RPM decreases flow from 40 GPM to 30 GPM Work section flows at full pump displacement of 40 GPMOperator wants 40 GPM from two work sectionsEngine rpm’s drop so max pump flow is 30 GPM; valve divides the flow accordingly
15Improved Efficiency of PCLS 102030405060500100015002000250030003500PressureFlowPower consumedby functionWasted powerL.S. system
16Improved 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.”
17Modular Design Offers Three Circuit Options Induced load/transition ckCompensator2. Load-sense pressure scompensated (PCLS) w/o induced load protection1. Load-sense pressure compensated (PCLS) with induced load protectionLoad sense ck for all circuit options located between the work ports!!!
18Modular Design Offers Three Circuit Options Transition ck3. Load-sense onlyLoad sense ck for all circuit options located between the work ports !!!
23Spool Options Types Flows 3 way cylinder and motor 4 position floatFlowsFlow limited at full stroke and 250 PSI marginGPM 8, 16, 24, 32, 45Additional 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 limitedAnother spool available that falls off the notch at full stroke and will try to output the full pump flow
27Low Pressure Regeneration Addresses cavitationCavitation wreaks havoc on hydraulic components and results in spongy machine operationDuring valve operation, the valve will sense if a function is cavitating and will force oil across anti-cavitation checks to fill voidIf 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
28Robust Endurance and fatigue testing: Inlet, work sections and outlet fatigue 6250 PSI and 3M cycles – NO FAILURESLoad-sense checks endurance 5000 PSI and 2M cycles – NO FAILURESTransition/induced load check 5000 PSI and 1M cycles – NO FAILURES
29Performance Enhancement Meter-out control can increase P-A/B pressure drop, when opposite port energizedWork section body lengthened to ensure that pressure drop P/A-B not affected when meter-out control requiredPort BTank
30Performance Enhancement 4-position float work sectionWhen work section is in the float position, traditional design will draw oil A and B tank coresVP170 design can draw oil from:Tank cores of ports A and BReturn flow from port BThis improves float down time and addresses potential cavitation
31Additional BenefitsFly cut lands each critical area (10) means consistent metering from valve to valveUses same spool positioners as VA20 and PC25 — reduces cost, risk and improves deliveryUses same port accessories as FIVE other valve series –– reduces cost, risk and improves deliverySpool stroke of .406" longest in industry — this means more metering vs. spool strokeOne solenoid used for on/off and proportional applications
32Summary Pressures to 5000 PSI Flow range is 8-55 gpm out of the work portFlow-sharingCircuit options – load-sense pressure compensated or load-senseOptional induced load protectionOptional low pressure regen and void filling schemeImproved filling scheme during float position (4 position float work section)Flexible, compact and cost effective EH packageSymmetrical spool for easy conversion to right or left-handed sectionsSame spool positioners and port accessories as open-center counterpartsStroke limiters available for hydraulic remote and solenoid operationFull complement of flow-limited spools availableEasily serviceable — all checks located on top of work section
33VP170 Product Launch Literature Product Catalog HY14-2006/US Overview Bulletin HY /US Service Bulletin HY M1/USCatalog CD HY /USAdvertisementProduct BitNews ReleaseTo order call CPARKER
34Hydraulic Valve Solutions For Mobile & Truck ApplicationsComplete product informationApplicationsSystems and subsystems
35Contact Us Phone: 440-366-5200 Fax: 440-366-5253 Local Parker Distributor
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