Proportional directional spool valve type EDL

Transcription

1 Proportional directional spool valve type EDL Product documentation Series connection Operating pressure pmax: Flow rate Qmax: 320 bar 40(60) lpm D

2 by HAWE Hydraulik SE. The forwarding and reproduction of this document, as well as the use and communication of its contents, are forbidden unless expressely permitted. Any breach or infringement will result in liability for damages. All rights reserved concerning patent or utility model registrations D EDL

3 Contents 1 Overview proportional directional spool valve type EDL Type coding, overview Available versions, main data Connection blocks and end plates Connection blocks for constant pump systems (with integrated 3-way controller) type PSL Connection blocks for control pumps/constant pressure systems Adapter plates End plates Add-on spool valves Directional spool valve In series intermediate plates Parameters General and hydraulic Characteristic curves Actuations Dimensions Connection blocks In series intermediate plates Directional spool valve with actuation E, EI Installation, operation and maintenance information Designated use Assembly information Operating instructions Maintenance information Planning information Notes for selection and lay-out Circuit examples Other information Note regarding assembly, installation and conversion Mounting Piping Sealing kits D EDL 3

4 1 Overview proportional directional spool valve type EDL Proportional directional spool valves are a type of directional valve. They control the direction of movement and the velocity of individual or multiple hydraulic consumers actuated simultaneously. Control is independent of the load and continuous. The directional spool valve type EDL with series connection is actuated directly. The flows for the individual consumers can be individually adjusted. By means of additional functions in the intermediate plates (longitudinal and sandwich valve combination) and ancillary blocks the proportional directional spool valve can be flexibly adapted to different control tasks. The directional spool valve type EDL can be combined directly with the proportional directional spool valve type PSL and PSV in size 2. It is used in mobile hydraulics, in particular in civil engineering and hydraulic tools. Features and benefits: One product for various control functions and small volume quantities Energy-saving closed-centre systems Compact and lightweight design Modular system can be directly combined with type PSL/PSV-2 Figure 1: Proportional directional spool valve type EDL Intended applications: Construction and construction materials machinery Cranes and lifting equipment Machines for forestry and agricultural purposes Municipal trucks D EDL

5 2 Type coding, overview Order coding example: PSL 3. 1 Z /D DA -DA 2 2 L H 25/16 40/25 /E /EI /2 /2 AN300 BN350 -E4 -G24 Solenoid voltage Table 15 Solenoid voltage and design End plates Table 14 End plates Ancillary blocks Table 13 Connection blocks Actuation types Volumetric flow key figure Table 12 Actuation types and additives Table 11 Volumetric flow key figure Circuit symbols Table 10 Circuit symbols Directional spool valve, basic valve Table 9 Directional spool valve, basic valve Connection Table 8 Connection on the directional spool valve for A and B Size Table 7 Size Pressure-limiting valve Table 6 Pressure-limiting valve 2/2-way solenoid valve Table 5 2/2-way solenoid valve Control oil supply Additional elements Table 4 Control oil supply Table 3 Additional features Connection Table 2 Connection on the connection block for P and R Basic type Table 1 Basic type for connection block A maximum of 10 directional spool valves can be switched in series in one or more valve manifold(s) via the internal LS line. If more are required, external wiring is to be provided (see note in Chapter 6.5, "Planning information" ("combination of more than 10 directional spool valves")) D EDL 5

6 Table 1 Basic type for connection block Table 2 Connection on the connection block for P and R Coding PSL PSV ZPL 52 ZPL 32 PSV E0 Description Hydraulic oil supply via constant pump (open centre) Hydraulic oil supply via control pump with loadsensing controller (closed centre), as 2nd separate block and for constant pressure systems Adapter plate for transition from PSL(V) size 5 (acc. to D ) to EDL 2 Adapter plate for transition from PSL(V) size 3 (acc. to D ) to EDL 2 Initial plate without separate ports. Can only be used in combination with the middle input block ZPL 22 P6R6, see Chapter 3.2.2, "In series intermediate plates" Operating pressure max = 250 bar! Coding Connection Standard 3 G 1/2 (BSPP) (ISO 228/1) UNF 2 3/4-16 UNF-2B (SAE-8, SAE J 514) Table 3 Additional features Table 4 Control oil supply Coding No designation S W B B G Z H U UH N Description Standard version Additional damping element in the LS gallery Orifice in LS line Restrictor check valve Restrictor check valve + release valve (type PSL) Increased circulation pressure of the 3-way controller approx. 14 bar(only PSL) Automatic reduction of the pump circulation pressure due to bypass valve Integrated pump gallery locking (type PSV) Coding No designation Description Without pressure-reducing valve, e.g. for external control oil supply (min. 20 bar up to max. 40 bar) 1 With integrated pressure-reducing valve for internal control oil supply (control pressure approx. 20 bar) 2 With integrated pressure-reducing valve for internal control oil supply (control pressure approx. 40 bar) D EDL

7 Table 5 Optional 2/2-way solenoid valve for random pump direction switching Table 6 Pressure-limiting valve (main pressure-limiting valve) in the connection block (only fixed) Coding No designation Z ZM V F.. or D.. PA PB PD Description Without directional valve, however an option for flange mounting is available Deenergised open Deenergised closed Pump direction switching for deenergised valve Pump direction switching with energised valve For pressure-limiting valve for second pressure stage (e.g. F50) Proportional pressure-limiting valve with different pressure ranges Coding Description /D... Pressure-limiting valve set to... bar /... for type PSL...U Table 7 Size Table 8 Connection on the directional spool valve for A and B Coding 2 Size 2 Description Coding Description DA To attach ancillary blocks, see Table 13 Table 9 Directional spool valve, basic valve Coding Description 2 Directional spool valve with input controller for individual volumetric flow metering 5 Input controller with reinforced spring for higher volumetric flow R 2, R 5 like A 2, A 5 but with check valve function Table 10 Circuit symbols Coding L H Table 11 Volumetric flow key figure for outlets A and B (see Table 5 Chapter 3.2.1) Coding Description.../... Coding for outlet A or B (can be selected separately) 3, 6, 10, 16, 25, 40, 50 Table 12 Actuation types Coding Description /E Electrical actuation with stroke limitation /EI Electrical actuation with manual override D EDL 7

8 Table 13 Ancillary blocks Coding /2 /3 /UNF 2 Description Ancillary blocks without additional functions /2 AS.. BS.. Ancillary blocks with shock valves at A and B (mutual spraying), with pressure specification (bar) /2 AN... BN... /UNF 2 AN.. BN.. /UNF 2 AN.. /UNF 2 BN.. /2 AL.. BL.. /UNF 2 AL.. BL.. /2 AL.. /2 BL.. /UNF 2 AL.. /UNF 2 BL.. /2 DRH /UNF 2 DRH /32 DFA /32 DFB /3 AVT /3 BVT Ancillary blocks with shock and servo-suction valves at A and B, with pressure specification (bar) Ancillary blocks with shock and servo-suction valves at A or B, with pressure specification (bar) Ancillary blocks with load-holding valves at A and B, with pressure specification (bar) Ancillary blocks with load-holding valves at A or B, with pressure specification (bar) Ancillary blocks with releasable check valves Ancillary blocks for differential circuit Check valve for A or B with emergency function /2 A(B) HN Ancillary blocks with emergency drain Table 13a Intermediate plates Coding /ZSS /ZVV /ZDR /ZDS /ZAL.. BL.. Description Intermediate plates with bypass valves Short-circuit valve between A and B Intermediate plates with load-holding valves at A and B, with pressure specification (bar) /Z 2 A(B).. Intermediate plates with additional port /ZDRH /Z 40 Spacer plate /ZANBN /ZVX /ZXV Intermediate plates with releasable check valves Intermediate plates with servo-suction valves Intermediate plates with check valves in A or B Table 14 End plates Table 15 Solenoid voltage and solenoid design Coding Description E. With thread acc. to ISO 228/1 E. UNF With thread acc. to SAE-4, acc. to SAE J 514 E0 E1 E2 E4 E5 E17... E20 E17 UNF... E20 UNF End plate without additional function, not in combination with valve sections SL2, SL3 or SL5 Operating pressure max. 250 bar! With control oil return line T external to tank (standard version) Like E1, with additional connection Y for connection to the LS outlet of another one, separate Like E1, however control oil return line is internal, maximum return pressure of 10 bar! Like E2, however control oil return line is internal, maximum return pressure of 10 bar! For variants see D , Table 10 Coding G 12 G 24 AMP 12 K 4 AMP 24 K 4 DT 12 DT 24 Description 12V DC, connection acc. to DIN EN A 24V DC, connection acc. to DIN EN A 12V DC, connection with AMP Junior Timer 24V DC, connection with AMP Junior Timer 12V DC, connection with Deutsch connector 24V DC, connection with Deutsch connector D EDL

9 3 Available versions, main data 3.1 Connection blocks and end plates There are two basic variants of connection blocks: Connection blocks with integrated 3-way controller when using a constant pump system (open centre) - type PSL (Chapter 3.1.1, "Connection blocks for constant pump systems (with integrated 3-way controller) type PSL ") Connection blocks for use with control pump systems (closed centre), constant pressure systems or for parallel oil supply of multiple physically separate directional spool valve banks in the second and all further valve blocks - type PSV (Chapter 3.1.2, "Connection blocks for control pumps/constant pressure systems ") Order coding of one connection block as an individual section (examples): PSL 31 Z/ G24 Note Size specification absolutely necessary, here -2! Connection blocks for constant pump systems (with integrated 3-way controller) type PSL The EDL valve sections can be easily combined with all type PSL(V) connection blocks, size 2. For a detailed overview of the available variants, see D D EDL 9

10 3.1.2 Connection blocks for control pumps/constant pressure systems Order coding example: PSV 3X E1 Additional element Table 2 Coding for additional features Connection blocks Table 1 Connection blocks Table 1 Connection blocks Coding Connection (BSPP) Description PSV 3X-2 G 1/2 Connection blocks for control pumps PSV 3X B.-2 G 1/2 Connection blocks for control pumps with damping orifices, see Table 2 PSV E0 -- Initial plate without separate ports. Can only be used in combination with the middle input block ZPL 22 P6R6, see Chapter 3.2.2, "In series intermediate plates" Operating pressure max = 250 bar! Circuit symbols PSV 3X-2 PSV 3X B.-2 PSV E0-2 For additional connection blocks for control pumps/constant pressure systems, see D The EDL valve sections can be easily combined with all type PSL(V) connection blocks, size 2. Table 2 Coding for features in the LS signal duct for the damping of pump controllers (For notes and explanation see Chapter 6.5, "Planning information" ("About the connection block")) Additional features only suitable where control pumps are used (limitation of the control oil flow). Coding No designation B 4, B 5, B 6, B 7, B 8 Description Standard, without additional feature With orifice # 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm or 0.8 mm in the LS duct (to limit control oil flow) D EDL

11 3.1.3 Adapter plates Order coding example: PSL 41/D H 80/63 /E - ZPL 32 - DA2 L 25/16 /E/2 - E4 - G 24 Coding Port Description Circuit symbol ZPL Adapter plate for transition from proportional directional spool valves, type PSL(V) size 3 to EDL 2. ZPL Adapter plate for transition from proportional directional spool valves, type PSL(V) size 5 to EDL End plates The EDL valve sections can be easily combined with all type PSL(V) end plates, size 2. For a detailed overview of the available versions, see D Coding Connection Description Circuit symbol E0 -- End plate without additional function, not in combination with valve sections SL2, SL3 or SL5 Operating pressure max. 250 bar! D EDL 11

12 3.2 Add-on spool valves Directional spool valve Order coding example: PSV 31/D DA 2 L 25/40 /E /2 - E1 - G 24 Ancillary blocks Table 7 Ancillary blocks Actuation types Table 6 Actuation types Flow Table 5 Maximum flow Circuit symbols Table 4 Circuit symbols Directional spool valve, basic valve Table 3 Directional spool valve, basic valve Order coding of the individual sections (examples) Directional spool valve Valve spool (single) EDL 2 - DA2 L 25/40 F 2/EI-G 24 EDL 2 - L 25/40 Note Size specification absolutely necessary, here EDL 2! The valve spools are subsequently interchangeable, e.g. if a different volumetric flow rating than initially planned becomes necessary. Table 3 Directional spool valve, basic valve Coding DA 2 DA 5 DAR 2 DAR 5 Description Standard, with input controller, for simultaneous load compensated moving of several consumers (4/3-way directional spool valve, standard version, control pressure approx. 6 bar) With input controller (for circuit symbol, see coding 2) but with reinforced 2-way control spring (control pressure approx. 9 bar ). Only usable in conjunction with connection blocks type PSL.H../... or type PSV or the middle input block type ZPL 22 P6R6, see Chapter 6.5 "Planning information" Like coding 2, 5, but with additional check valve function (spool valve = slight leakage) Only usable in conjunction with connection blocks type PSL.H../... or type PSV or the middle input block type ZPL 22 P6R6, see Chapter 6.5 "Planning information" D EDL

13 Circuit symbol With respect to main flow and actuation, the circuit symbols are neutral and must be supplemented by the corresponding circuit symbols given in Tables 5, 6 or 7, see also examples in Table 7 and Chapter 6. Ancillary block and intermediate block acc. to D /3-way directional spool valve with input controller DA2... (DA5..., DA7...) Table 4 Circuit symbols L H Table 5 Maximum flow P d A(B) in accordance with coding Coding for spool valve acc. to Table 4 Coding for volumetric flow Q A, B (lpm) at consumer ports A and B Note The flows for the consumer ports A and B can be selected freely, e.g. 25/40, 6/16. This enables optimal adaptation to the respective consumer while exploiting the full functional lift. In addition there is the possibility of stroke limitation. The maximum reflux volumetric flow must not exceed 80 lpm. Spool valves with coding 50 may only be used at cylinder ratio 1: D EDL 13

14 Table 6 Actuation types Actuation Coding Circuit symbol Electrical actuation Electrical actuation with stroke limitation E Electrical actuation with manual override EI Correcting variables Control current ratio I/I N min. approx. 0.2 max. approx. 1 Note For reference values for start of flow at A or B (= min) up to max. usable volume flow in accordance with the volumetric flow coding Tables, see characteristic curves, Chapter 4.2 "Characteristic curves ". Table 7 Ancillary blocks The EDL valve sections can be easily combined with all type PSL(V) connection blocks, size 2. For a detailed overview of the available variants, see D D EDL

15 3.2.2 In series intermediate plates The EDL valve sections can be easily combined with all type PSL(V) connection blocks, size 2. For a detailed overview of the available variants, see D PSV E0-2 - DA2 L 40/40 /EI - ZPL 22 P6R6 - DA2 H 25/16 /EI/2 - E0 - G 24 Coding Connection Description Circuit symbol ZPL 22 P6R6 P and R = G 1 1/4 (BSPP) Middle input block for installation of EDL 2 sections on both sides. Hydraulic oil supply via control pump with load-sensing controller, as 2nd separate block or for constant pressure systems. Only possible in combination with initial plate PSV E D EDL 15

16 4 Parameters 4.1 General and hydraulic General information Description Design Material Mounting Tightening torques Installation position Proportional directional spool valves EDL Spool valve in block construction, up to 10 spool valves, all-steel design Steel; nitrided valve housing, electrogalvanised sealing nuts and connection block, hardened and ground functional inner parts Steel; valve housing galvanized zinc plated; hardened and ground functional inner parts Surface treatment (solenoid): DIN Fe ZnNi 8 Valve bank M8 Chapter 5, "Dimensions" See Chapter 5, "Dimensions" As desired Ports P Hydraulic oil inlets (pump) or lead-on R Return lines A, B Consumer ports LS Load-signal outlet, e.g. port for pump controller on PSV. M Z T Caution No pressure line! Pressure gauge port (pump side) Pilot pressure connection (inlet: bar; outlet: 20 or 40 bar ) Control oil tank line Y Load-signal inlet (end plates E 2, E 5, E 18, E 18 UNF, E 20 and E 20 UNF) Surface treatment All surfaces corrosion-inhibiting, gas nitrided Solenoid at actuation E.. Zinc galvanised and passivated Hydraulic fluid Hydraulic oil conforming DIN part 1 to 3; ISO VG 10 to 68 conforming DIN Viscosity limits: min. approx. 4, max. approx mm 2 /s opt. operation approx mm 2 /s. Also suitable are biologically degradable pressure fluids types HEPG (Poly-alkylenglycol) and HEES (Synth. Ester) at service temperatures up to approx. +70 C. Recommended purity class ISO /17/ /15/ D EDL

17 Temperatures Ambient: approx C, Fluid: C, Note the viscosity range! Permissible temperature during start: -40 C (observe start-viscosity!), as long as the service temperature is at least 20K higher for the following operation. Biologically degradable pressure fluids: Observe manufacturer's specifications. By consideration of the compatibility with seal material not over +70 C. Note Note restrictions on explosion-proof solenoid! Pressure and volumetric flow operating pressure p max = 320 bar; connections P, A, B, LS, M, Y The achievable pressure on the consumer side of the directional spool valves is lower by an amount equal to the fall in internal control pressure at the 3-way valve PSL (see characteristic curve) or the pump controller (PSV). Return connection R(R1) 50 bar volumetric flow Max. consumer volumetric flow in accordance with Table 5 Chapter 3.2.1, "Directional spool valve" Weight Connection block PSV 3X PSV E0 = 1.7 kg = 0.3 kg For other connection blocks, see D Valve section DA.. E, EI = 1.6 kg For other ancillary blocks, see D D EDL 17

18 4.2 Characteristic curves Characteristic curves Viscosity during measurements approx. 60 mm 2 /s Δp-Q characteristic curves Pressure-limiting valve in the middle input block, type ZPL 22 P6R6 Directional spool valve PdA(B), A(B)dR Figure 2: Q volumetric flow (lpm); p pressure setting (bar) 2-way input controller Figure 3: Q volumetric flow (lpm); /p pressure setting (bar) Figure 4: Q volumetric flow (lpm); p load pressure (bar) Control characteristic curve for consumer volumetric flow (guidelines, example for directional spool valve variant with input controller type EDL 2 - D. 2...) Figure 5: Q consumer volumetric flow (lpm), I control current (A) Figure 6: Q consumer volumetric flow (lpm), I control current (A) D EDL

19 4.3 Actuations For other data, such as coding, circuit symbols, etc. see Chapter 3.2, " Add-on spool valves" General information Actuation E, EI Proportional solenoid, manufactured and tested acc. to DIN VDE 0580 single-action solenoid with anchor chambers sealed on the outside and connected to the return duct. The anchors are thereby maintenance-free lubricated by the hydraulic fluid and protected against corrosion. Specifications apply to all solenoid versions, unless specified otherwise Nominal voltage U N 24V DC 12V DC Coil resistance R Ω 5.5 Ω Current, cold I A 2.18 A Limit current I G (I lim) 0.78 A 1.56 A Power, cold P 20 = U N x I W 26 W Limit power P G = U N x I G 19 W 19 W Cut-off energy W A Ò 0.3 Ws Ò 0.3 Ws Rel. duty cycle (reference temperature δ 11 = 50 C) Required dither frequency Dither amplitude 20% Ò A D Ò 50% S1 S Hz (recommended value: 55 Hz) Characteristic curves Viscosity during measurements approx. 60 mm 2 /s I stroke characteristic curve Figure 7: Control current (I,I G); Spool stroke (%) D EDL 19

20 Electrical connection Circuitry for coding -X 12, -X 24 DIN EN A Coil a (1) Coil b (2) IP 65 (IEC 60529) -AMP 12, -AMP 24 -DT 12, -DT 24 AMP Junior Timer IP 65 (IEC 60529) IP 67 (IEC 60529) The specifications regarding the IP protection class apply for versions featuring a properly assembled plug D EDL

21 5 Dimensions All dimensions in mm, subject to change! 5.1 Connection blocks Connection blocks PSV 3X.-2 PSV E0-2 1 End plate 2 Directional spool valve, see Chapter End plate 2 Directional spool valve, see Chapter 5.3 Ports P, R LS, M PSV 3X.-2 G 1/2 G 1/4 (ISO 228/1) D EDL 21

22 Adapter plates ZPL 32 ZPL 52 1 Add-on spool valves, size 3 2 Add-on spool valves, size 2 acc. to D Add-on spool valves, size 5 2 Add-on spool valves, size 2 acc. to D D EDL

23 5.2 In series intermediate plates In series intermediate plates ZPL 22 P6R D EDL 23

24 5.3 Directional spool valve with actuation E, EI Actuation type E Actuation type EI 1 Plug may be mounted offset by Ancillary blocks 1 Plug may be mounted offset by Ancillary blocks Additional solenoid versions Coding -AMP 12, -AMP 24 Coding -DT 12, -DT D EDL

25 6 Installation, operation and maintenance information 6.1 Designated use This fluid-power product has been designed, manufactured and tested acc. to standards and regulations generally applicable in the European Union and left the plant in a safe and fault-free condition. To maintain this condition and ensure safe operation, operators must observe the information and warnings in this documentation. This fluid-power product must be installed and integrated in a hydraulic system by a qualified staff who is familiar with and observes the general engineering principles and relevant applicable regulations and standards. In addition, application-specific features of the system or installation location must be taken into account if relevant. This product may only be used within oil-hydraulic systems. The product must be operated within the specified data. This documentation contains the technical parameters for various product versions. Note Non-compliance will void any warranty claims made against HAWE Hydraulik. 6.2 Assembly information The hydraulic accumulator must be integrated in the system via state of the art connection components (screw fittings, hoses, pipes, etc.). The hydraulic system must be shut down as a precautionary measure prior to dismounting; this applies in particular to systems with hydraulic accumulators D EDL 25

26 6.3 Operating instructions Product, pressure and/or flow settings All statements in this documentation must be observed for all product, pressure and/or flow settings on or in the hydraulic system. Caution Risk of injury on overloading components due to incorrect pressure settings! Always monitor the pressure gauge when setting or changing the pressure. Filtering and purity of the hydraulic fluid Soiling in the fine range, e.g. abraded material and dust, or in the macro range, e.g. chips, rubber particles from hoses and seals, can cause significant malfunctions in a hydraulic system. It is also to be noted that new hydraulic fluid from the drum does not necessarily meet the highest purity requirements. For trouble-free operation pay attention to the purity of the hydraulic fluid (see also purity class in Chapter 4, "Parameters"). 6.4 Maintenance information This product is largely maintenance-free. Conduct a visual inspection to check the hydraulic connections for damage at regular intervals, but at least once per year. If external leaks are found, shut down and remedy. Check the device surfaces for dust deposits at regular intervals (but at least annually) and clean the device if required D EDL

27 6.5 Planning information Notes for selection and lay-out a) Connection block Additional damping options for the connection blocks type PSL and PSV are described in the D publications. Caution The load pressure must be at least 20 bar. b) Control blocks Coding 2 (example EDL 2-DA 2 L 25/16...) The standard version of the load-compensated directional spool valve is fitted with an input controller (coding 2). Thanks to the control pressure (approx. 6 bar ), the consumer volumetric flow is regulated depending on the spool valve elevation (spool valve edges are designed as metering orifices) regardless of the system pressure and other consumers: Coding 5 (example EDL 2-DA 2 H 40/40...) If the control pressure is changed, the maximum possible volumetric flow of the individual consumer may be influenced (see statements on codings 1 and 2 above). The control pressure is approx. 9 bar for coding 5. This results in a usable volumetric flow that is approx. 1.3 times higher than for directional spool valve variants with coding 2 (standard). Coding DAR 2 and DAR 5 In addition to its control function, the pressure compensator also acts as a check valve. This prevents a possible flow reversal in the event of a shortage in supply on the pump side D EDL 27

28 c) Use of control pumps For load-sensing controls in combination with control pumps, the LS signal duct to the (load-sensing controller) of the pump is limited to minimise circulation losses when in neutral position (i.e. when no hydraulic oil is dispensed to the consumer). This limiting takes place via the proportional directional spool valves. Without this limiting the pump would have to work in the no-lift position with its remaining delivery flow against the maximum pressure setting of the pressure controller. As there are directional spool valves without this limiting possibility, some brands of (load-sensing controllers) have an internal bypass orifice from the LS signal inlet to a decompressed leakage outlet. Thanks to the internal limiting of proportional directional spool valves of type EDL, this bypass channel is not necessary and it can even cause malfunctions due to lost control oil. For functional reasons, the control oil flow must be consciously limited (approx. 2 lpm) (creeping of the consumer). Note Care must therefore be taken to ensure that a possible bypass orifice in the pressure delivery flow controller is sealed. d) Combination with load-holding valves If three control elements, the 3-way controller in the pump or in the connection block, the 2-way controller in the directional valve and load-holding valve insert are switched in series, oscillations may occur due to external variations of load and resonance effects. These effects can be effectively suppressed by systematic use of a bypass orifice and throttle-, check-, pre-load valve combination connected in parallel within the control oil circuit at the load-holding valve type LHDV acc. to D Similar behaviour can be achieved using load-holding valves of type LHT acc. to D e) Combination of more than 10 directional spool valves By switching the load-sensing line in series, a total of max. 10 directional spool valves can be linked. If more than 10 directional spool valves are required, these must be arranged in separate valve banks D EDL

29 f) Additional components For electro-hydraulic actuations 1. Male connector MSD Standard, included in the delivery SVS Male connector with LEDs for function deactivation acc. to Chapter 3.2, " Add-on spool valves" Table (for more details see D 7163) 2. Electric amplifier EV 22 K 2-12(24) acc. to D 7817/1 One board can control 2 directional valves 3. Electric amplifier EV 1 M3 acc. to D 7831/2 EV 1 D acc. to D 7831 D A remote control potentiometer with direction switches is also required (see detailed information in D 7831/2 Chapter 6.2) 4. Programmable logic valve control PLVC acc. to D 7845 ff 5. Electric joystick EJ 1, EJ 2 or EJ 3 acc. to D Radio controls are accepted if they fulfil the requirements acc. to Sk 7814 (Approved brands: Co. HBC-ELEKTRONIK in D Crailsheim, Germany; Co. HETRONIK Steuer-Systeme in D Langquaid, Germany; Co. NBB-Nachrichtentechnik in D Ölbronn-Dürrn, Germany; Co. SCANRECO Industrieelektronik AB, Box 19144, S-5227 Södertälje, Sweden) Load-holding valves Load-holding valves type LHT in accordance with D 7918 or type LHDV in accordance with D 7770 corresponding to note Chapter 6.5, "Planning information" ("Combination with load-holding valves"), type LHK in accordance with D 7100 only for particularly stiff complete systems and for directional spool valves without input controller (coding 1 in accordance with Table, Chapter 3.2.1, "Directional spool valve") Other valves Proportional directional spool valve type PSL(V) size 2 acc. to D (combinable without intermediate plate with EDL 2) Proportional directional spool valve type PSL(V) size 3 acc. to D (combinable via intermediate plate ZPL 32 with EDL 2) Proportional directional spool valve type PSL(V) size 5 acc. to D (combinable via intermediate plate ZPL with EDL 2) Proportional directional spool valve type PSL(V)F size 3 acc. to D F (directional spool in flange design) Proportional directional spool valve type PSL(V)F size 5 acc. to D F (directional spool in flange design) Connection blocks type HMPL and HMPV acc. to D 7700 H D EDL 29

30 6.5.2 Circuit examples Order coding example 1: PSL control for hydraulic oil supply via constant pump PSL 3U/ DA 2 - DA 2 - DA 2 - DA 2 L L H H 40/25 25/16 16/16 40/40 /E/2 AN 200 BN 200 /E/2 AN 250 BN 250 /E/2 /E/2 E0-G D EDL

31 Order coding example 2: PSV control for hydraulic oil supply via control pump PSV 551/ ZPL 32 - A 2 - DA 2 - DA 2 O J L L 80/80 40/25 25/16 25/16 C200 A200 B150 /EI /EI/2 /EI/2 /EI/2 E1-AMP 24 K D EDL 31

32 Order coding example 3: PSV control for hydraulic oil supply via control pump PSV E0-2 - DA 2 - DA 2 - ZPL 22 P6R6/250 - DA 2 - DA 2 H H L L 50/50 25/25 16/10 6/3 /EI/2 AS 180 BS 100 /EI/2 AS 200 BS 200 /EI/2 /EI/2 E0-AMP D EDL

33 7 Other information 7.1 Note regarding assembly, installation and conversion All installation, set-up, maintenance and repairs must be performed by authorised, qualified and trained staff. The use of this product beyond the specified performance limits, operation with non-specified fluids and/or use of non-genuine spares will invalidate the warranty Mounting The valve bank must be mounted to the frame or base of the machine in such a way that no stress is induced. Three screws and elastic washers between the bank and the frame are recommended for mounting Piping All fittings used must utilise deformable seals. The recommended torque values must not be exceeded Sealing kits Connection block DS Valve section DS Intermediate plate ZPL 32 DS ZPL 52 DS D EDL 33

34 Additional versions Proportional directional spool valve, type PSL and PSV size 2: D Proportional directional spool valve, type PSL, PSM and PSV size 3: D Proportional directional spool valve, type PSL, PSM and PSV size 5: D Proportional directional spool valve type PSLF, PSVF and SLF size 3: D F Proportional directional spool valve type PSLF, PSVF and SLF size 5: D F Proportional directional spool valve banks, type PSLF, PSVF and SLF size 7: D F Directional spool valve bank type SWS: D 7951 D EDL_ HAWE Hydraulik SE Streitfeldstraße München Postfach München Germany Tel Fax info@hawe.de