Proportional directional spool valve type EDL Product documentation Series connection Operating pressure pmax: Flow rate Vmax:

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Overview of 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 ow rates for the individual consumers can be individually adjusted. The proportional directional spool valve can be exibly adapted to different control tasks by means of additional functions in the intermediate...

Available versions, main data 2.1 Order coding, overview Order coding example: PSV 3X End plates Ancillary blocks Actuation types Shuttle valve LS pressure limitation Flow rates Table 12 Ancillary blocks (selection) Table 12a Intermediate plates (selection) Table 10 Actuation types Table 9 Shuttle valve Table 8 LS pressure limitation Table 7 Maximum ow rates P d A(B) Table 7a Combination of ow rates Circuit symbols Inow controller Table 11 Solenoid voltage and solenoid version Table 6 Circuit symbols Table 5 Inow controller Directional valve, basic block Table 4 Basic block Size Additional...

2.2 Connection blocks and end plates There are the following basic variants of connection blocks: ■ ■ Connection blocks with integrated 3-way controller when using a constant pump system (open centre) – type PSL Connection blocks for use with variable 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 Adapter plates for combining proportional directional spool valves type PSL and PSV, size 3 and 5 Order coding of a single connection block (example):...

Table 2 Additional elements (For notes and explanation, see Chapter 6, "Other information" ("On connection blocks")) Additional elements only suitable where variable pumps are used (limitation of the control oil ow). Coding Standard, without additional element Orice # 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm or 0.8 mm in the LS gallery (for control oil limitation)

2.2.2 End plates Order coding example: PSV 3 X - 2 Table 3 End plates Coding Circuit symbol End plate without additional function, not in combination with valve sections SL2, SL3 or SL5 • Can only be used with max. three sections • Only in conjunction with shuttle valve, coding W 3, Table 9 in last valve section Operating pressure max = 250 bar! With control oil return line T external to tank Like E 1, with additional port Y for connection to the LS outlet of another, separately arranged PSV spool block Like E 1, however control oil return line is internal, maximum return pressure of 10 bar!...

2.3 Valve section 2.3.1 Directional valve Order coding example: PSV 31/D250 - 2 - Ancillary blocks Actuation types LS pressure limitation Flow rates Table 10 Actuation types Table 8 LS pressure limitation Table 7 Maximum ow rates P d A(B) Table 7a Combination of ow rates Circuit symbols Inow controller Table 12 Ancillary blocks (selection) Table 12a Intermediate plates (selection) Table 6 Circuit symbols Table 5 Inow controller Directional valve, basic block Order coding of the single valve section (examples): Table 4 Basic block Valve section Valve spool (single) The size specification is...

Table 4 Basic block Coding Complete valve section with an ancillary block in accordance with Table 12 D 7700-2 Circuit symbol With respect to main ow and actuation, the circuit symbols are neutral and must be supplemented by the corresponding circuit symbols given according to Table 6 to 10, Chapter 6, see also examples in Table 10 4/3-way directional spool valve with inow controller Example: - DA 7 H40/40/E/2 (-DT 12) 4/3-way directional spool valve with inow controller and LS pressure limitation Example: - DA 2 L25/16 C 200 /E/2 (- X 24) 1 Ancillary block and intermediate block acc. to D...

Table 6 Circuit symbols L Table 7 Maximum ow rates P d A(B) in accordance with coding Coding for spool valve acc. to Table 6 Coding for ow rate QA, B (lpm) at consumer ports A and B 3 The specied nominal ow rates correspond to the set values for E actuation. For EI actuation, the max. ow rates can be higher. The maximum reux ow rate must not exceed 80 lpm. The ow rates for the consumer ports A and B can be selected in accordance with Table 7a, e.g. 40/25, 16/16. This enables optimal adaptation to the respective consumer while exploiting the full functional lift. In addition, there is...

Table 8 LS pressure limitation Coding Circuit symbol Without protection Joint LS pressure limitation for A and B with pressure specification and load pressure, signal output G 1/8 (BSPP), only in conjunction with solenoid version coding AMP.. and DT.. (Table 11) Order coding example: DA 2 L 25/16 Shuttle valve Table 9 Shuttle valve Table 9 Shuttle valve Coding Shuttle valve in LS gallery Without shuttle valve, e.g. in last valve section for combination with end plate coding E 0 Circuit symbol

Table 10 Actuation types Coding Circuit symbol Electrical actuation with stroke limitation Electrical actuation with manual override Electrical actuation with manual override, A-side only Electrical actuation with manual override, B-side only For reference values for start of ow at A or B (= min.) up to max. usable volume ow in accordance with Table 7, see Chapter 3.2, "Characteristics" The solenoid voltage and solenoid version are dened at the end of the type designation and applies to all solenoids in the valve bank, see Table 11 Table 11 Solenoid voltage and solenoid version Coding Electrical...