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DG3V-7 & DG5V-7 Segment I

DG3V-7 & DG5V-7 Segment I
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Pilot Operated Directional Valve DG3V-7-30 Design Solenoid Controlled Pilot Operated Directional Valve DG5V-7-50 Design General description DG*V-7 valves are used primarily for controlling the starting, stopping and direction of fluid flow. Two series of valves, DG5V solenoid controlled, pilot operated and DG3V pilot operated models are available with a wide selection of spools. These include meter-in and meterout spools and a regeneration type that can obviate extra valves essential in traditional circuit arrangements. All spools have been designed to provide good low shock, fast response...

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Model Code DG3V-7 30 Series, Pilot Operated Directional Valves For pilot operated valves: For solenoid controlled, pilot operated valves: Fluid Compatibility 1 Blank – Standard BUNANitrile Seals F3 – Viton Seals Note: For further information see “Hydraulic Fluids” section on page 13. 2 Spool type See “Functional Symbols” section on pages 5-6. 3 Spool spring arrangement A – Spring offset, end-to-end (P to B when operated) AL – As “A” but left-hand build (P to A when operated) B – Spring offset, endtocenter (P to B when operated)  BL – As “B” but left-hand build (P to A when operated)  C –...

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Model Code (Cont...) Indicator Lights 12 Blank – None L – Solenoid indicator lights• • Flying lead coil type only Surge Suppressor/ 13 damper D1 – Diode positive bias D2 – Negative bias D7 – Transorb type 15 Tank Port Rating 6 – 210 bar (3000 psi) for AC performance. 7 – 210 bar (3000 psi) for DC performance. 16 Design Number 20 series for DG3V valves. 30 series for DG5V valves. Subject to change. See Page 7 for circuit details Application Notes Pilot Pressure a. Pilot pressure must always exceed tank line pressure by at least the requisite minimum pilot pressure. This also applies when...

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Functional Symbols Spool Types Shown in 3-position form, plus 2 transients. 1. In the detailed and simplified symbols on this and the previous pages, the transient positions are omitted for simplicity. 2. In certain 2-position valves, the “o” position becomes an additional transient, i.e. in DG5V-7-*A(L) and DG5V-7-*N valves. Your Eaton representative can provide further details. Spring Offset, End-to-End, Y2 Opposite Hand, DG3V-7-*AL The following are shown in a DG3V-7-*C example: 1. Pilot choke module 2. Stroke adjusters at either or at both ends (shown at both ends in example) One or...

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Functional Symbols DG5V-7, Solenoid Controlled, Pilot Operated Models P Comprehensive and simplified symbols shown configured for external pilot supply and internal drain Spring Offset, End-to-End, Spring Offset, End-to-End, Opposite Hand, DG5V-7-*AL DG5V-7-*A Spring Offset, End-to-Center DG5V-7-*B Spring Centered, DG5V-7-*C 3. External pilot connection X SOLENOID IDENTIFICATION Model Spool types (see also in “Model Code” on page 8) DG5V-7-*A/B(-**)(-E)(-T)(-*)-M 1 DG5V-7-*A/B(-**)(-E)(-T)(-*)-VM 2 2 DG5V-7-*AL/BL(-**)(-E)(-T)(-*)-M DG5V-7-*AL/BL(-**)(-E)(-T)(-*)-VM b o a 3 4 X P T Y B...

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Operating Data MAXIMUM PRESSURES: DG5V-7-**(L)(-*)(-E)(-*) valves, (externally drained); ports: P, A, B, T and X Y DG5V-7-**(L)(-*)(-E)-T(-*) valves, (internally drained)u; ports: P, A, B and X 350 bar (5000 psi)  T 210 bar (3045 psi)  Pilot pressures See “Pilot Pressures” on page 9  The DG5V, 50 design two-stage valves have been designed to satisfy the needs of most applications. Consult your Eaton representative about an alternative model if: a) Valves are required to remain pressurized for long periods without frequent switching, and /or b) Back pressure on the drain port of...

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Operating Data Pressure drop characteristics See page 9, 10 Response times, DG5V valves: Typical values for a DG5V-7-2C-E spring centered, externally piloted valve under standard test conditions and operating with 150 L/min (40 USgpm) at Coil rating: Pilot pressure, bar (psi): Energizing Time, ms ♦ De-energizing ♦ From applying a signal at the solenoid until the main-stage spool completes its travel A In pure switched circuit conditions, devoid of the effects of any suppression diodes and full-wave rectifiers TEMPERATURE LIMITS:_ Fluid temperature limits See appendix Ambient temperature...

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Performance Data Pilot Pressures Maximum: 350 bar (5000 psi). Typical minimum differential pilot pressure characteristics, shown below, are based on looped flow through P to A to B to T under standard test conditions. Min. differential pilot pressure Curve correction As drawn Subtract 3 bar (44 psi) As drawn As drawn As drawn Flow rate Pressure drop I FLOW-DIRECTION CURVE REFERENCE SPOOL TYPE P - A B - T Flow rate Pressure Drop Characteristics The following typical pressure drops (p) at flow rates (Q) are based on standard test conditions, using oil of 0,865 specific gravity. Except where...

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Installation Dimensions Millimeters (inches) Solenoid Controlled Models with ISO 4400 (DIN 43650) Electrical Connections and Pilot Choke DG5V-7–**(L)(-2)(-E)(-T)(-*)-(V)M–U example For dimensions A, B, C, D and E see page 16 For solenoid identification see page 16 For stroke adjusters see page 15 4 holes, Ø 10,8 (0.42 dia) through, spotfaced Ø 17,0 (0.67 dia). Torque bolts to 49-59 Nm (36-43 lbf ft) 2 holes, Ø 6,5 (0.25 dia) through, spotfaced Ø 11,0 (0.43 dia). Torque bolts to 9-14 Nm (6.6-10.3 lbf ft) AC models: 45 (1.8) DC models: 61 (2.4) For plug options see page A.16. With pilot choke...

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Installation Dimensions Solenoid Controlled Models with Stroke Adjusters DG5V-7-***(L)(-2)(-E)(-T)(-*)-(V)M-U example For solenoid identification see page 16 Pilot choke adjusters, when fitted Stroke adjuster fitted both ends when Model Code 4 = 1 or 3 Stroke adjuster fitted this end when Model Code 4 = 8 or 28 Stroke adjuster fitted this end when Model Code 4 = 7 or 27 Turn locknut counter-clockwise, then turn screw clockwise to shorten stroke, or counter-clockwise to increase stroke. Re-tighten locknut. Solenoid Controlled Models with Junction Box having Optional Terminal Strip and...

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