Proportional Valve Group Modules PVSK

Transcription

1 MAKING MODERN LIVING OSSIBLE echnical Information roportional Valve Group Modules VSK powersolutions.danfoss.com

2 Revision history able of revisions Date Changed Rev May 2014 Converted to Danfoss layout DIA CMS BC Dec 2010 New back cover BB Jan 2010 Drawings changed BA Jan 2010 Japan location AB Jun 2004 First edition AA 2 520L0556 Rev BC May 2014

3 Contents Introduction VSK function Dimensions Specifications Specification and code number for VSK modules... 4 Specification and code numbers for VSK spools... 5 VSK characteristics...7 Stay bolt set, VAS for VSK L0556 Rev BC May

4 Introduction Danfoss introduces VSK-modules with integrated diverter valve and -disconnect function. he module is intended for cranes, telescope lifts and other applications that have special demands on functionality and safety. he VSK-module can be integrated in VG 32 valve groups for open- as well as closed-center systems. VSK VSK spool Functions of the VSK-module: When the diverter valve is in neutral position, there is no pressure (only tank pressure) in the - channel of the valve group. When the diverter valve spool is actuated in A-direction, it enables the basic modules in the VGgroup to receive pump flow supply. When the diverter valve spool is actuated in B-direction, it enables the (High ressure Carry Over) HCO-port in the VSK module and the -cannel in the valve group to receive pump flow supply. Specification and code number for VSK modules Specification and code number for VSK modules Symbol Description Code no. Open and closed center inlet with pilot supply for electrical actuation Max. pump pressure 350 bar [5076 psi] Max. pump flow 120 l/min [31.7 US gal/min] = ¾ ; HCO = ¾ 157B L0556 Rev BC May 2014

5 Introduction Specification and code numbers for VSK spools Specification and code number for VSK spools Symbol Description Code no. 4 way - 3 position spool for fixed displacement pump HCO flow 40 l/min [10.57 US gal/min] Open neutral position 157B9657 * 4 way - 3 position spool for fixed displacement pump HCO flow 40 l/min [10.57 US gal/min] Closed neutral position 157B9658* * VSK spool must be option mounted. 520L0556 Rev BC May

6 VSK function VSK sectional view HCO HCO VB VB HCO HCO As the VSK-module is provided with pump () and HCO (High ressure Carry Over) connections, the standard pump connection in V, VV or VM must be sealed with a steel plug (see example on page 6). Note that the steel plug is not included upon delivery. In neutral position, the spool in the VSKmodule interrupts the connection from the pump to the -channel in the valve group. his not only ensures a low pressure (tank pressure) in the -channel, but also a low pressure-drop in flow circulating between pump and tank (see VSK characteristics on page 7). As the VSK-module replaces endplate VS/VSI, the code number field (field 11) in the specification sheet must be left open. In general, the diverter function must be specified as a working function VB, which means that VE, VSK spool and VM must be specified separately (see VG 32 specification sheet Specifications on page 10). o ensure an adequate supply to the VE pilot reduction valve, the tank channel of VSK includes a backpressure valve. In open-centre systems, the pump flow must be min. 40 l/min (10.57 US gal/min) to maintain a sufficient pressure-drop across the backpressure valve. V A 6 520L0556 Rev BC May 2014

7 VSK function As the VSK-module has an integrated pilot oil supply, always use standard V 32 without pilot oil supply in VG 32 valve groups. VSK characteristics ressure drop ; VSK spool in neutral position ressure drop in V 520L0556 Rev BC May

8 Dimensions 85.5[3.366] 23[0.91] [1.46] 48[1.89] L L [0.94] 23[0.91] 16.5[0.650] 12[0.47] 48[1.89] 24[0.94] 95[3.74] 69.5[2.736] 36.5[1.437] 36[1.41] A1 B1 A2 B2 A3 B3 A4 B4 35[1.38] 24[0.89] 62[2.44] 24[0.89] 27.5[1.083] HCO 22[0.87] V A Because of limited space conditions, VE and VM on the work sections have to be mounted as shown on the above drawing L0556 Rev BC May 2014

9 Dimensions Stay bolt set, VAS for VSK Qty, Basic modules L1 L2 Code no. Weight kg [lb] B [0.55] B [0.66] B [0.77] B [0.99] B [1.10] B [1.21] B [1.43] B [1.54] B [1.65] B [1.87] 520L0556 Rev BC May

10 Specifications VG 32 specification sheet L0556 Rev BC May 2014

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12 roducts we offer: Bent Axis Motors Closed Circuit Axial iston umps and Motors Displays Electrohydraulic ower Steering Electrohydraulics Hydraulic ower Steering Integrated Systems Joysticks and Control Handles Microcontrollers and Software Open Circuit Axial iston umps Orbital Motors LUS+1 GUIDE roportional Valves Sensors Steering ransit Mixer Drives Danfoss ower 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 artner in Mobile Hydraulics. Go to 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 artners, we also provide comprehensive global service for all of our components. lease contact the Danfoss ower Solution representative nearest you. Comatrol Schwarzmüller-Inverter urolla Valmova Hydro-Gear Daikin-Sauer-Danfoss Local address: Danfoss ower Solutions US Company 2800 East 13th Street Ames, IA 50010, USA hone: Danfoss ower Solutions GmbH & Co. OHG Krokamp 35 D Neumünster, Germany hone: Danfoss ower Solutions ApS Nordborgvej 81 DK-6430 Nordborg, Denmark hone: Danfoss ower Solutions (Shanghai) Co., Ltd. Building #22, No Jin Hai Rd Jin Qiao, udong New District Shanghai, China hone: 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. his 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. 520L0556 Rev BC May Danfoss A/S, 2014