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KBCG-3-1*

KBCG-3-1*
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Proportional pressure relief valves F:T*N Powering Business Worldwide

Contents GENERAL DESCRIPTION FUNCTIONAL SYMBOL TYPICAL SECTION MODEL CODES OPERATING DATA PERFORMANCE DATA INSTALLATION DIMENSIONS ELECTRICAL INFORMATION Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Typical wiring connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . FURTHER INFORMATION This product has been designed and tested to meet specific standards outlined in the...

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General description An electro-hydraulic proportional relief valve designed to regulate pressure in a hydraulic system in proportion to an applied electrical input. These open-loop, single-stage valves can be used for direct control of pressure in low flow systems, or for pilot control of larger pressure controls, and for such applications as pressurecontrolled pumps. Other models For proportional pressure relief valves with flow ratings up to 400 L/min (106 USgpm), see catalog V-VLPO-MC003-E (model types KBCG, sizes 6 and 8). Valve design ensures low hysteresis and good repeatability....

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KB Proportional valve with integral Pressure relief on Ramp options 1 No ramp 2 Standard ramp (typically 65 ms) 3 Long ramp (typically 80 ms) Command/pressure characteristic Mounting G Subplate mounted Interface 3 ISO 4401, size 3 (NFPA D03) Electrical connection Build orientation Blank Right hand (standard) PC7 7 pin connector, without plug supplied PE7 7 pin connector, with plug supplied enable signal PR7 as PC7 but with pin 'C' used for enable signal Controlled pressure range At rated flow of 1 L/min (0.26 USgpm) 40 2-40 bar (29-580 psi) Design number, 1* series 11 Subject to change...

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Standard test conditions are with antiwear hydraulic oil at 36 cSt (168 SUS) and 40°C (104°F) Maximum pressures: Port P: Operating See [6] in "Model Code” Port T: Operating 2 bar (29 psi). See "Back pressure at port T” under "Installation and start-up” Flow limits: Rated flow Maximum flow Coil or amplifier rating Command signal: Volts (see model code E] - 1) Input impedance Common mode voltage to pin B Current (see model code E] - 2) Input impedance Valve enable signal: Enable Disable Input impedance 7-pin plug connector 1 L/min (0.26 USgpm) 5 L/min (1.3 USgpm) 24V x 40W max. (22 to 36V...

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6 EATON Proportional pressure relief valves V-VLPO-MC002-E1 September 2020

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Performance data Pressure gain, Typical Typical pressure v. command signal response of KBCG-3-250 models Test conditions: Fluid = Antiwear hydraulic oil at 36 cSt (168 SUS) % Command signal Pressure override, Typical Test conditions: Fluid = Antiwear hydraulic oil at 36 cSt (168 SUS) Pressure override (Rise above valve cracking pressure) (At valve cracking pressure) 0 Rated ﬂow; see 6 in "Model Code" EATON Proportional pressure relief valves V-VLPO-MC002-E1 September 2020

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Installation dimensions To bleed air, loosen plug in end of core tube; re-tighten to 2,4 +/- 0,2 Nm (1.85 +/- 0.15 Ibf ft) after bleeding is complete. EATON Proportional pressure relief valves V-VLPO-MC002-E1 September 2020

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Electrical information Block diagram 7-pin plug connections +24V Power 0V Enable Non-inverting Command signal Ramp Current monitor Solenoid drive ▲ In valves with PH7 or PR7 type electrical connection. Wiring Connections must be made via the 7-pin plug mounted on the amplifier. Recommended cable sizes are: Power cables For 24V supply: 0,75 mm2 (18 AWG) up to 20m (65 ft) 1,00 mm2 (16 AWG) up to 40m (130 ft) Screen (Shield) A suitable cable should have at least 6 cores with pairs of conductors individually screened and an overall screen. Cable outside diameter 8,0-10,5 mm (0.31- 0.41 inches)....

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Typical wiring connections Voltage input (M1) Spool position monitor voltage (pin F) will be referenced to the KB valve local ground. User Panel Power Supply Outer screen Demand Signal Spool Position Monitor Valve must be connected to ground via subplate Enclosure Connector shell 0V must be connected to ground Wiring connections for M1 valves with enable feature NNote: In applications where the valve must conform to European RFI/EMC regulations, the outer screen (shield) must be connected to the outer shell of the 7 pin connector, and the valve body must be fastened to the earth ground....

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Electrical information Current input (M2) Spool position monitor voltage (pin F) will be referenced to the KB valve local ground. User Panel Power Supply Outer screen Demand Signal Spool Position Monitor Valve must be connected to ground via subplate Enclosure Connector shell 0V must be connected to ground Wiring connections for M2 valves with enable feature NNote: In applications where the valve must conform to European RFI/EMC regulations, the outer screen (shield) must be connected to the outer shell of the 7 pin connector, and the valve body must be fastened to the earth ground. Proper...

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Hydraulic fluids and Contamination control requirements Contamination control requirements Hydraulic Fluids & Recommendations on contamination control methods and the selection of products to control fluid condition are included in Eaton Hydraulic Fluid Recommendation 03-401-2010 rev 1 . For products in this catalog the recommended levels are: Up to 210 bar (3000 psi) - 18/16/13 Above 210 bar (3000 psi) - 17/15/12 Installation and start-up guidelines The proportional valves in this catalog can be mounted in any attitude but it may be necessary, in certain demanding applications, to ensure...

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