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KBCG-6-1

KBCG-6-1
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Proportional pressure relief valves F:T*N Powering Business Worldwide

Contents GENERAL DESCRIPTION TYPICAL SECTION FUNCTIONAL SYMBOLS MODEL CODES OPERATING DATA PERFORMANCE DATA Pressure override, Off-Load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressure override when relieving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pressure gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

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General description These two-stage pressure relief valves offer extensive application possibilities through their ability to control the pressure setting in proportion to an applied electrical input (up to a pressure limit which is manually adjustable and lockable). The integral amplifier allows the pressure to be controlled from a low power command signal: either a voltage or current command. The amplifier is mounted in a robust metal housing and electrical connections are via an industry standard 7-pin plug. Factory-set adjustments ensure high reproducibility valve-to-valve. Features and...

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Functional symbols Manual and electrical pilots internally drained to port T. Manual and electrical pilots drained to side drain port u. Model code¨ = Blank 7 Side drain port u Tapped port on side of pilot head. Manual pilot internally drained to port T; electrical pilot drained to side drain port u. Model code¨ = 3 7 7-pin plug Side drain port uTapped port on side of pilot head. EATON Proportional pressure relief valves V-VLPO-MC003-E1 September 2020

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Electrical command options M1 +/- 10 volts control signal [1 Valve type KB Proportional valve with integral Pressure relief Ramps 3 Mounting G Standard ramp for KBCG-6/8 valve types Subplate mounted HD Interface - ISO 6264 With B port high pressure inlet, A port reduced pressure outlet 6 AR-06-2-A Command/pressure characteristic A Standard 12 Manual adjustment W Screw/locknut Electrical connection PC7 7 pin connector, without plug supplied PE7 7 pin connector, with plug supplied used for enable signal PR7 as PC7 but with pin 'C' used for enable signal Controlled pressure range Based on...

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Standard test conditions are with antiwear hydraulic oil at 36 cSt (168 SUS) and 50°C (122°F) EATON Proportional pressure relief valves V-VLPO-MC003-E1 September 2020

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EATON Proportional pressure relief valves V-VLPO-MC003-E1

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Performance data Data is typical with oil at 36 cSt (168 SUS) and at 50°C (122°F) Pressure override, off-load Valve pressure drop Graphs show the minimum pressures obtainable: b) When the valve is vented (see following explanation). a) With 0 mA current to the solenoid coil When the vent port X (or alternative vent port in the valve body) is connected to the reservoir via a suitable 2-way pilot valve, the mainstage of the relief valve opens to allow full flow from P to T at low pressure drop. The minimum pressure drop is obtained when the pilot valve is also de-energized. The total pressure...

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L/min USgpm L/min USgpm Flow rate Valve size Test conditions: Trapped volume Flow rate Step size: Response Pressure demand Time (ms) Pressure gain Typical pressure versus command signal response of KBCG-6-250 model . Step response KBCG models with factory-set gain . Test method 1 . Trapped volume between pump and test valve, as in table 2 . Flow rate set at pump, as in table 3 . Response = time from step input signal until pressure reaches 90% of step change, as measured by transducer EATON Proportional pressure relief valves V-VLPO-MC003-E1 September 2020

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Installation dimensions KBCG-6/8 models Dimensions are shown in mm (inches) To bleed air, loosen plug in end of core tube; re-tighten to 2,4 +/- 0,2 Nm (1.85 +/- 0.15 lbf ft) after bleeding is complete. Side drain port G 1/4 ( 1/4“ BSPF) (see “Functional Symbols“ section) L 7,5 (0.29) A/F Turn clockwise to increase pressure setting Port T outlet to reservoir Port P Port X pressure (vent port) inlet G 1/4 ( 1/4“ BSPF) alternative vent port. Remove plug for access. WARNING To conform to the EC Electromagnetic Compatibility directive (EMC) this KBCG valve must be fitted with a metal 7-pin...

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Mounting surfaces, ISO 6264 AR-06-2-A AS-08-2-A When a subplate is not used, a raised pad must be provided for mounting . The pad must be flat within 0,001 mm/100 mm (0.0001 710") and smooth within 0,8 pm (32 pin) . Dimensional tolerances are ±0,2 mm (±0.008") except where indicated Port functions: P = Pressure inlet T = Outlet to reservoir X = Vent, or remote control port 0T 0X Y Thread x Min. Full thread ▲ Tolerance on bolt and pin locations ±0,1 mm (±0.004") . ♦ These ISO standard dimensions can be used, but improved flow paths to and from valve are obtained by using 48,0 (1.89) instead...

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Electrical information Block diagram Wiring Connections must be made via the 7-pin plug mounted on the amplifier. Recommended cable sizes are: 7-pin plug connections +24V Power 0V Command signal Ramp Current monitor 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) Signal cables Screen (Shield) Solenoid drive ▲ In valves with PH7 or PR7 type electrical connection. WARNING All power must be switched off before connecting or disconnecting any plugs. EATON Proportional pressure relief valves V-VLPO-MC003-E1 September 2020 A suitable cable...

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Electrical information Voltage input (M1) wiring 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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