CBGA-LHN

(CBGA-LHN) 3:1 pilot ratio, standard capacity counterbalance valve, 240 L/min, T-17A Cavity, 1000 to 4000 PSI adjustment range with 25 PSI check, 3000 PSI standard setting PRODUCT CODE - CBGA-LHN

£178.02Ex. VAT£213.62Incl. VAT

CBGA-LHN Features

  • Capacity: 240 L/min
  • Cavity: T-17A
  • Control: Standard Screw Adjustment
  • Functional Setting Range: 1000 to 4000 PSI with 25 PSI Check (70 to 280 Bar with 1.7 Bar Check)
  • Standard Setting: 3000 PSI (210 Bar)
  • Seal Material: Buna-N
Full Description
QTY

Product Description

CBGA-LHN Technical Features

Counterbalance valves with pilot assist are meant to control an overrunning load. The check valve allows free flow from the directional valve (port 2) to the load (port 1) while a direct-acting, pilot-assisted relief valve controls flow from port 1 to port 2. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by the pilot ratio.

Other names for this valve include motion control valve and over-center valve.

  • Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
  • Turn adjustment clockwise to decrease setting and release load.
  • Full clockwise setting is less than 200 psi (14 bar).
  • Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the backpressure.
  • Reseat exceeds 85% of set pressure when the valve is standard set. Settings lower than the standard set pressure may result in lower reseat percentages.
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in the circuit.
  • Two check valve cracking pressures are available. Use the 25 psi (1,7 bar) check unless actuator cavitation is a concern.
  • This valve has positive seals between all ports.
  • All 3-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size).
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.

 

CBGA-LHN Technical Data

Cavity T-17A
Series 3
Capacity 240 L/min.
Pilot Ratio 3:1
Maximum Recommended Load Pressure at Maximum Setting 215 bar
Maximum Setting 280 bar
Factory Pressure Settings Established at 30 cc/min.
Maximum Valve Leakage at Reseat 0,3 cc/min.
Adjustment – No. of CCW Turns from Min. to Max. Setting 3.75
Operating Characteristic Standard
Reseat >85% of setting
Valve Hex Size 31,8 mm
Valve Installation Torque 203 – 217 Nm
Adjustment Screw Internal Hex Size 4 mm
Locknut Hex Size 15 mm
Locknut Torque 9 – 10 Nm
Model Weight 0.62 kg.
Seal kit – Cartridge Buna: 990017007
Seal kit – Cartridge EPDM: 990017014
Seal kit – Cartridge Polyurethane: 990017002
Seal kit – Cartridge Viton: 990017006

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