4/3 4/2 Directional valve elements with or without secondary relief valves, and with or without LS connections

Transcription

1 RA /1.11 1/1 4/3 4/2 Directional valve elements with or without secondary relief valves, and with or without LS connections B8_8 (EDBZ) Summary Description Page General specifications 1 Ordering details 2 Configuration 2 Spool variants 3 Principles of operation, cross section 3 Technical Data 4 p-q v characteristic curves 6 Performance limits 6 External Dimensions and Fittings 7 Electric connection 8 General specifications Valve elements with 4 ways and 3, or 2, positions Control spools directly operated by screwed-in solenoids with extractable coils In the de-energized condition, the control spool is held in the central position by return springs. Wet pin tubes for DC coils, with push rod for mechanical override; burnish surface treatment Coils can be rotated 36 around the tube. Manual override (push-button or screw type) available upon request Plug-in connectors available: EN (Was DIN 4365); AMP Junior; DT4-2P (Deutsch); free leads 45

2 2/1 Bosch Rexroth Corp. Hydraulics EDBZ RA /1.11 Ordering Details B 8 _ 8 _ Family Directional valve elements EDB Type Size 4 Configuration Standard With secondary valve on A With ch. for Load Sensing Coil type C36 Spool variants 1) 4/3 operated on both sides a and b 4/2 operated on side a only = = 1 = 4 = _ 2 = _ 3 Votage supply Without coil = 12V DC = OB 13V DC = AD 24V DC = OC 27V DC = AC 48V DC = OD 11V DC = OE (21.5 DC) 24V AC = OV (98 DC) 11V AC = OW (27 DC) 23V AC = OZ Available connections = 1 = 2 = 3 = 4 = 7 = 31 = B = = 1 = 2 = = P = F = Optional fittings Standard emergency Push-button type emergency Screw type emergency Secondary valves setting 2) 5 21 bar ( PSI) * 1 31 bar ( PSI) 25 5 bar ( PSI) Ports** 9/16-18 UNF 2-B (SAE6) Electric connections Without coils With coils, without connectors With coils having connectors EN With coils having AMP Junior connector With coils having horizontal AMP Junior connector With coils having DEUTSCH DT 4-2P connector With coils and bipolar sheathed lead 35mm (13.8 in) long * Without secondary valve (versions B8 ; B84 ), the standard configuration corresponds to. ** Additional ports on request. 1) The required hydraulic symbol and spool variant can be chosen by consulting page 3. 2) Only for configuration (1) The secondary valves have a maximum flow capacity of 6 l/min (1.6 GPM). Configuration A B A B P T = = 1 P T A B P LS T = 4 46

3 RA /1.11 EDBZ Hydraulics Bosch Rexroth Corp. 3/1 Spool variants 8 _ 2 8 _ 3 a A B a b a b P T P T A B = A21 = B21 = X31 = Y31 = C21 = E21 = K21 Principles of operation, cross section The sandwich plate design directional valve elements B8_8 are very compact direct operated solenoid valves which control the start, the stop and the direction of the oil flow. These elements basically consist of a stackable housing (1) with a control spool (2), one or two solenoids (5), and one or two return springs (4). When energized, the force of the solenoid (5) pushes the control spool (2) from its neutral-central position to the required end position a or b, and the required flow from P to A (with B to T), or P to B (with A to T) is achieved. Once the solenoid is de-energized, the return spring (4) pushes the spool thrust washer (3) back against the housing and the spool returns in its neutral-central position. Each coil is fastened to the solenoid tube by a ring nut (6). A pin (7) allows to push the spool (2) in emergency conditions, when the solenoid cannot be energized, like in case of voltage shortage

4 4/1 Bosch Rexroth Corp. Hydraulics EDBZ RA /1.11 Technical Data (for applications with different specifications consult us) General Valve element with 2 solenoids and plug-in pins EN Valve element with 1 solenoids and plug-in pins EN kg (lbs) 1.34 (2.95) kg (lbs) 1.6 (2.34) Ambient Temperature C ( F) ( ) [NBR seals] Hydraulic Maximum pressure at P, A, and B ports bar (PSI) 31 (45) Maximum dynamic pressure at T bar (PSI) 18 (261) Maximum static pressure at T bar (PSI) 21 (345) Maximum inlet flow l/min (GPM) 25 (6.6) Maximum inlet flow with spool A21 l/min (GPM) 2 (5.3) Hydraulic fluid General properties: it must have physical lubricating and chemical properties suitable for use in hydraulic systems such as, for example: Mineral oil based hydraulic fluids HL (DIN part 1). Mineral oil based hydraulic fluids HLP (DIN part 2). For use of environmentally acceptable fluids (vegetable or polyglycol base) please consult us. Fluid Temperature C ( F) ( ) [NBR seals] Permissible degree of fluid contamination Viscosity range mm 2 /s ISO 4572: b x 75 X= ISO 446: class 2/18/15 NAS 1638: class 9 Electrical Voltage type DC (AC only with RAC) Voltage tolerance (nominal voltage) % Duty Continuous, with ambient temperature 5 C (122 F) Maximum coil temperature C ( F) 15 (32) Insulation class H Compliance with Low Voltage Directive LVD 73/23/EC (26/95/EC), 24/18/EC Coil weight with connection EN kg (lbs).215 (.44) Voltage V RAC (21.5) 11 +RAC (98) 23 +RAC (27) Voltage type DC DC DC DC DC DC AC AC AC Power consumption W Current 1) A Resistance 2) Ω ) Nominal 2) ± 7% at temperature 2 C [68 F] 48

5 RA /1.11 EDBZ Hydraulics Bosch Rexroth Corp. 5/1 =OB 1 =OB 2 Voltage (V) Connector type Coil description Marking Coil Mat no. 12 DC EN (Ex. DIN 4365) C361 12DC 12 DC R93344 =OB 3 12 DC AMP JUNIOR C363 12DC 12 DC R93347 =OB 4 12 DC AMP JUNIOR Horizontal C364 12DC 12 DC R =OB 7 12 DC DEUTSCH DT 4-2P C367 12DC 12 DC R93348 =OB DC Cable 35 mm long C DC 12 DC R93345 =AD 1 =AD 2 13 DC EN (Ex. DIN 4365) C361 13DC 13 DC R93351 =AD 7 13 DC DEUTSCH DT 4-2P C367 13DC 13 DC R93349 =OC 1 =OC 2 24 DC EN (Ex. DIN 4365) C361 24DC 24 DC R93353 =OC 3 24 DC AMP JUNIOR C363 24DC 24 DC R93357 =OC 4 24 DC AMP JUNIOR Horizontal C364 24DC 24 DC R =OC 7 24 DC DEUTSCH DT 4-2P C367 24DC 24 DC R93358 =OC DC Cable 35 mm long C DC 24 DC R93355 =AC 1 =AC 2 27 DC EN (Ex. DIN 4365) C361 27DC 27 DC R93356 =AC 7 27 DC DEUTSCH DT 4-2P C367 27DC 27 DC R9335 =OD 1 =OD 2 48 DC EN (Ex. DIN 4365) C361 48DC 48 DC R93359 =OD 4 48 DC AMP JUNIOR Horizontal C364 48DC 48 DC R =OE 1 =OE 2 =OV 1 =OV 2 =OW 1 =OW 2 =OZ 1 =OZ 2 11 DC 24 RAC 11 RAC 23 RAC EN (Ex. DIN 4365) EN (Ex. DIN 4365) EN (Ex. DIN 4365) EN (Ex. DIN 4365) C361 11DC 11 DC R93361 C DC 21.5 DC R93354 C361 98DC 98 DC R9336 C361 27DC 27 DC R

6 6/1 Bosch Rexroth Corp. Hydraulics EDBZ RA /1.11 Characteristic curves Measured with hydraulic fluid ISO-VG32 at 45 ± 5 C (113 ± 9 F); ambient temperature 2 C (68 F). Pressure p PSI bar Performances limits l/min GPM Flow Q Spool Variant Curve No. P > T P > A P > B A > T B > T B E A C K X Y Measured with the solenoids at their operating temperature, 1% under voltage and without pre-loading of the tank. Pressure p PSI bar GPM Flow Q Minimum flow for efficiency of LS control l/min Spool Variant Curve No. B21 1 E21 1 A21 4 C21 1 K21 3 X31 1 Y31 2 The performance curves are measured with flow going across and coming back, like P > A and B > T, with symmetrical flow areas. In case of special circuit connections, the performance limits can change. PSI 9 bar Pressure p l/min GPM Flow Q Lowest pressure setting curve for secondary valves Pressure p PSI bar Secondary valve setting Curve No bar (7-295 PSI) 1 31 bar (14-45 PSI) bar (35-7 PSI) l/min Flow Q 1.6 GPM 5

7 RA /1.11 EDBZ Hydraulics Bosch Rexroth Corp. 7/1 External Dimensions and Fittings 1 Solenoid tube hex 22 mm (.87 inch); torque 2 22 Nm ( ft-lb). 2 Ring nut for coil locking (OD 2.5 mm); torque 3 4 Nm (2.2 3 ft-lb). 3 Identification label. 4 Clearance needed for connector removal. 5 Optional push-button emergency, EP type, for spool opening: it is pressure stuck to the ring nut for coil locking. Material no. R Optional screw type emergency, EF type, for spool opening: it is screwed (torque 6-7 [ ft-lb]) to the tube as replacement of the coil ring nut. Material no. R Flange specifications for coupling to ED intermediate elements. 8 One through hole for coupling of the ED Directional Valve Elements. Recommended tie rod M8 with strength class DIN 8.8. Torque 2 22 Nm ( ft-lb). 9 O-Rings for P and T ports. 1 Space needed for secondary valve. 11 Plug for 2 positions versions (4/2); hex 22 mm, [.87 inch]. Torque 2-22 Nm [ ft-lb]. 12 A and B ports.

8 8/1 Bosch Rexroth Corp. Hydraulics EDBZ RA /1.11 Electric connection (or connections, in case of two solenoids) Without coils, but with ring nut and O-Rings for coil fitting (solution recommended for flexible stock handling) With coils having plug-in pins EN , without connectors = = 1 With coils and with connectors non-assembled, type EN Protection class: IP 65 when connector with seal is properly screwed down, and cable clamp is correctly tightened : Standard. 182-LED-T-A1: with LED monitoring presence of voltage G-DO-2-1: with VDR (Voltage Dependent Resistor), to prevent input voltage over-shootings RAC: special connectors with rectifier (RAC) for AC applications. = 2 Material No. Description R GRAY R BLACK R LED-T-A1 12 DC/AC R LED-T-A1 24 DC/AC R LED-T-A1 48 DC/AC R LED-T-A1 11 DC/AC R LED-T-A1 23 DC/AC R G-DO DC with VDR R G-DO DC with VDR With coils having AMP Junior connector, and with bi-directional diode. Protection class: IP 65 with female connector properly fitted (see drawing). Material No. R R Description RAC GRAY RAC BLACK With coils having Horizontal AMP Junior connector, and with bi-directional diode. Protection class: IP 65 with female connector properly fitted (see drawing). = 3 = 4 With coils having bi-directional diode and bipolar sheathed free lead, 35 mm long, without pins. With coils having DEUTSCH DT 4-2P connector, and with bi-directional diode. Protection class: IP 69 K with female connector properly fitted (see drawing). = 31 = 7 52

9 RA /1.11 EDBZ Hydraulics Bosch Rexroth Corp. 9/1 53

10 1/1 Bosch Rexroth Corp. Hydraulics EDBZ RA /1.11 Bosch Rexroth Corp. Hydraulics 2315 City Line Road Bethlehem, PA USA Telephone (61) Facsimile (61) This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth Corporation. Without their consent it may not be reproduced or given to third parties. The data specified above only serve to describe the product. No statements concerning a certain condition or suitability for a certain application can be derived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that our products are subject to a natural process of wear and aging. 54