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DG3V-8 & DG5V-8 Segment J

DG3V-8 & DG5V-8 Segment J
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Remote Pilot Operated Directional Valve DG3V-8 10 Design Solenoid Controlled Pilot Operated Directional Valve DG5V-8 10 Design General description The Size 8 Directional Control Valve serves as a control valve package. It offers directional control, pilot pressure reducers, pilot chokes, and main stage stroke adjustment to control the flow. Each valve contains a mainstage spool which is positioned in the valve by special arrangement. The four arrangements are: • The valves are generally used to control large flows up to 700 l/min (185 USgpm) at 350 bar (5000 psi) and provide low pressure...

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Model Codes DG3V-8 Remote Pilot Operated Directional Valves Special Seals 1 Blank – None F3 – Seals for fire resistant fluids. F6 – Seals for water glycol. 2 Directional Control Valve DG3V – Subplate mounting; pilot operated- remote operator. Pressure rating 350 bar (5000 psi) for all ports. (See minimum pilot pres sure requirements on page 6. 3 Valve Size 8 – Valve size CE TOP 8, NFPA D08 4 Gauge Ports Blank – .4375-20 UNF-2B Thread B – 1/4 B SP Thread 5 Spool Types Please refer functional symbols on page 7 for spool types. 6 Spool Spring Arrangement Blank – No spring A – Spring offset to...

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Model Codes DG5V-8 Solenoid Controlled Pilot Operated Directional Valves (F*)-DG5V-8 - * - (B) - * ** - (**) - (*) - P** - (E) - (T) - (*) - (V)M - * ** * * - (L) - (*) - ** - 10 1 (Omit if not required.) F3 – Seals for fire resistant fluids. F6 – Seals for water glycol. 2 Pilot Valve Type H – CETOP 3, High performance Blank – None 1 – Stroke adjustment at both ends  2 – Pilot choke adjustment both ends 3 – “1” and “2” combined  7 – Stroke adjustment, port A end only  8 – Stroke adjustment, port B end only  27 – “2” and “7” combined  28 – “2” and “8” combined Omit if not required...

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Model Codes (Contd.) Blank – None L – Solenoid indicator light• •Flying lead coil type only 16 Surge Suppressor damper (DC voltages only, omit if not required) D1 – Diode positive bias D2 – Negative bias D7 – Transorb type 17 Coil Voltage See electrical information on page 9 for voltages available. Others available upon request. B – 110V AC 50Hz/120V AC 60 Hz BL – 110V 50 Hz/120V 60 Hz D – 220V AC 50 Hz/240V AC 60 Hz DS – 28V DC 30 watt G – 12V DC GL – 12V DC H – 24V DC HL – 24V DC HM – 24V DC 8 watt

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Application Notes General Description DG5V-8 models are twostage directional control valves having an integrally mounted wet armature solenoid pilot valve. These valves are generally used to control the movement of a work cylinder or the rotation of a fluid motor. Pressure Centered Models Designated by ‘‘D’’ under spring/spool arrangement in model code. connection ‘‘Y’’ becomes a drain connection and must be pioped directly to tank at atmospheric pressure through a surge-free tank line. Back pressure at this connection would cause valve to malfunction. Caution: Spring offset models contain...

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Functional Symbols Y33 b Spool The following are shown in a 11 DG3V-8-*C example: 2. Stroke adjusters at either 31 or at both ends (shown at both 33 in example) ends One or more options can be built 52 any DG3 series into valve. 56 Transient condition only. Both ports T A and T B are available. 1. Pilot choke module 13 Transient condition only. Transient condition only. 561 Both ports T A and T B are ava Transient conditionTonly. ava Both ports T A and B are Both ports T A and T B are ava Transient condition only. Both ports T A and T B are ava 8 8 Spring Offset, End-to-End, Spring Offset,...

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Functional Symbols DG5V-8, Solenoid Controlled, Pilot Operated Models Comprehensive and simplified symbols shown configured for external pilot supply and internal drain Spring Offset, End-to-End, Spring Offset, End-to-End, Spring Offset, End-to-Center Spring Offset, End-to-Center, Opposite Hand 1. Pilot choke module either or at both ends (shown at both ends in 3. External pilot connection be built into any DG5 series

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Operating Data MAXIMUM PRESSURES: DG5V-8 valves, (externally drained) P, A, B, T and X * Y § DG5V-8 valves, (internally drained) P, A, B and X T § Maximum flow without mal-function (DG3V-8 and DG5V-8) Pilot pressures 350 bar (5000 psi)  350 bar (5000 psi) 700 L/min (185 Usgpm) See “Pilot Pressures” on page 28 ELECTRICAL INFORMATION: Voltage ratings, DG5V valves See 17 in “Model Code” on page 5 Voltage limits, DG5V valves: Maximum voltage Minimum voltage See “Temperature limits”, on page 10 90% of rated voltage Power consumption, DG5V valves with AC solenoids: Dual-frequency coils at 50 Hz,...

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Operating Data Pressure drop characteristics See page 11,12 Response times, DG5V valves: Typical values for a DG5V-8-2C-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 DG3V – 8 Models Typical with mineral oil at 36 cSt (168.6 SUS) and a specific gravity of 0.87. Spool Pressure Drop Curve Number Type PA BT PB AT PT in Center Maximum flow rates Performance based on full power solenoid coils warm and operating at 90% rated voltage. Pressure Drop & Malfunction Flow The following table lists the appropriate pressure drop curve and malfunction flow curve between ports for each spool type. Use the following example to determine pressure drop for a selected spool. Example: Find the pressure drop from PB for type 7 spool. Using the table...

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