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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E

DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E
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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 1

Powering Business Worldwide

DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 2

Manual Lever/Cam/Plunger Operated Directional Valve DG3/17/18/20/21-3 60 Design Eaton directional valves offer versatility of application for the many directional control requirements of hydraulic machinery. Ruggedness of design, manufacturing quality, and worldwide parts and service availability maximize uptime, resulting in greater profits for your company. Manual Lever/Cam/Plunger Valves These valves are available in an NFPA D03 interface. These valves are rated at flows to 75 l/min (20 USgpm) and 350 bar (5000 psi) maximum pressure. Roller cam, plunger, spring offset, detented, spring...

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 3

General Information General Description Five types of valve are available with different controls primarily for controlling the starting, stopping and direction of fluid flow in a system. The valves are developed from the well-known series of DG4V-3-60 series solenoid operated valves (see Eaton literature # GB-C-2015). These manual valves are available with a choice of up to nine different spool types, depending on valve configuration. All spools have been designed to provide good low-shock characteristics. External regulation of the control input by hydraulic, lever, pneumatic, cam or...

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 4

Model Code 1 Valve Type 3 – Hydraulically operated V – 350 bar (5000 psi) on P, A & B ports 3 – ISO 4401-03 (CETOP 3,NFPA D03) ISO 4401-AB-03-4-B Refer page 6 for spool type Spool Spring 3 Arrangement A – Spring offset, end-toend AL – Same as “A” but left hand build B – Spring offset, end to center BL – Same as “B” but left hand build C – Spring centered B – SAE internal straight threads 4 Internal Drain (omit if not required) A, B & F models only for designs (F models must have internal drain) T – Internal drain Installation dimensions remain as shown for design numbers 60 thru 69. 5...

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 5

Model Code 1 Valve Type 18 – Air Operated V – 350 bar (5000 psi) on P, A & B ports 3 – ISO 4401-03 (CETOP 3,NFPA D03) ISO 4401-AB-03-4-B 2 Spool Type (center condition) Refer page 8 for spool type Spool Spring 3 Arrangement A – Spring offset to A, (single operator) AL – Spring offset to B, L.H. build (single operator) B – Spring centered, operator A removed (single operator) BL – Spring centered, operator B removed (single operator) C – Spring centered (dual operator) F – Spring offset, shift to center (single operator) FL – Spring offset, shift to center, L.H. build (single operator) N –...

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 6

Functional Symbols Spool Options for DG3V-3-60 Spool Options Basic Valve Symbol Usable Spool Options Single operator models marked  are optionally available with a manual override in the non-operator end only. Models with operators at both ends are not available with manual overrides. Full flow Restricted flow NOTE: a) Pilot pressure must always exceed drain line pressure or, for internally drained valves, the T-line pressure by at least the requisite minimum pilot pressure. Open-center spools (0, 1 and 8) should be used only in externally drained valves. b) Internally drained valves may...

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 7

Functional Symbols Spool Options for DG17/20/21V-3-60 Spool Options Basic Valve Symbol Usable Spool Options Full flow Restricted flow EATON DG3/17/20/21/18V-3-10 Design E-VLVI-SS001-E1 October 2015

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 8

Functional Symbols Spool Options for DG18V-3-*-60 0 Spool Options Basic Valve Symbol Usable Spool Options Single operator models marked  are optionally available with a manual override in the non-operator end only. Models with operators at both ends are not available with manual overrides. Full flow Restricted flow NOTE: a) Pilot pressure must always exceed drain line pressure or, for internally drained valves, the T-line pressure by at least the requisite minimum pilot pressure. Open-center spools (0, 1 and 8) should be used only in externally drained valves. b) Internally drained valves...

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 9

Operating Data Maximum flow: Maximum operating pressure: Maximum tank line pressure: Minimum pilot pressure: Recommended fluid viscosity range: Weight: Operating Data Control (swept) volume(s): DG3V-3**A(L) models, end-to-end: DG3V3-**B(L)/F(L) models: center-to-end DG3V-3-**C/N models: center-to-end end-to-end See chart on page 9. 350 bar (5000 psi) 210 bar (3000 psi) See chart on page 9. 13-54 cSt 1,2 kg (2.5 lbs.) DG3V-3-**(N) no-spring and detented valves require only momentary pilot pressurization to shift spool (in approx. 0.1 seconds). All other models require pilot pressure to be...

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 10

Pilot Pressure Requirements Maximum Flow Rates Pressure Drop Characteristics The spools require the minimum pilot pressures shown in the graph below to overcome the spring force and any flow forces. Some spools are limited by the ability to spring return the valve. Some spools are limited in the conditions they will operate without reliability problems. These are the single ended spools which must operate within limits outlined in the graph below. The pressure drop curves give approximate pressure drop ΔP when passing 21 cSt (100 SUS) fluid(s) having .87 specific gravity. Minimum pilot...

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 11

Pressure drop curve reference chart **Note type "33" spool at center will pass approximately 20 I/min. (5.3 USgpm) at 124 bar (1798 psi) inlet pressure. The pressure drop curves give approximate pressure drop ΔP when passing 36 cSt (100 SUS) fluid(s) having .87 specific gravity. For any other specific gravity (G1)* the pressure drop ΔP will be approximately: ΔP1 = ΔP (G1 / G) * Specific gravity of fluid may be obtained from its producer. For any other viscosity the pressure drop ΔP will change as follows:

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DG3V-3, DG17V-3, DG18V-3, DG20V-3, DG21V-3 Segment E - 12

Pressure drop curve – reference chart **Note type “33” spool at center will pass approximately 20 l/min. (5.3 USgpm) at 124 bar (1798 psi) inlet pressure. Flow – USgpm The pressure drop curves give approximate pressure drop ΔP when passing 36 cSt (100 SUS) fluid(s) having .87 specific gravity. For any other viscosity the pressure drop ΔP will change as follows: For any other specific gravity (G1)* the pressure drop ΔP will be approximately: ΔP1 = ΔP (G1 / G) * Specific gravity of fluid may be obtained from its producer. Flow – l/min EATON DG3/17/20/21/18V-3-10 Design E-VLVI-SS001-E1 October...

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