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SUN HYDRAULICS
COUNTERBALANCE
CBEGLIV


$105.20
  • SUN HYDRAULICS
  • Material:CBEGLIV
  • Model:CBEG-LIV
  • Summary:Cartridge

Quantity in stock: 5

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Sun Hydraulics directly.***
The Sun Hydraulics CBEGLIV (CBEGLIV) is a meticulously designed counterbalance valve that operates to control an overrunning load effectively. This valve features a check valve that permits free flow from the directional valve port 2 to the load port 1, while a direct-acting, pilot-assisted relief valve manages the flow from port 1 to port 2. The inclusion of pilot assist at port 3 significantly reduces the effective setting of the relief valve based on a predetermined pilot ratio. Notably, this valve is also referred to as a motion control or over center valve in various applications. The CBEGLIV model should be set at least 1.3 times higher than the maximum load-induced pressure to ensure optimal performance. The adjustment mechanism is straightforward; turning clockwise decreases the setting and releases the load, with full clockwise ensuring minimal pressure under 200 psi (14 bar). It's important to consider that backpressure at port 2 increases the effective relief setting proportionally by adding to it at a rate of "1 plus the pilot ratio times the backpressure." This model boasts an impressive reseat capability, exceeding 85% of set pressure when standard settings are used. For specific applications involving phosphate ester fluids, cartridges with EPDM seals are recommended as they resist damage from petroleum-based substances. The robust design allows these cartridges to be installed directly into cavities machined into actuator housings which enhances protection and circuit stiffness. Users can choose between two check valve cracking pressures based on their specific needs related to actuator cavitation. The CBEGLIV operates with a capacity up to 30 gpm (120 L/min) and can handle pressures up to 5000 psi (350 bar), making it suitable for various demanding hydraulic applications. Its design incorporates Sun's floating style construction which minimizes potential internal parts binding caused by excessive installation torque or variations in cavity/cartridge machining, ensuring reliable and consistent performance across various operational scenarios.

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 does not have positive seals on the pilot section and will pass up to 2 in³/min.@1000 psi (32 cc/min.@70 bar ) between port 2 and port 3. This is a consideration in master-slave circuits and in the leak testing of valve-cylinder assemblies.
  • 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.

Cavity T-2A
Series 2
Capacity 30 gpm120 L/min.
Pilot Ratio 4.5:14.5:1
Maximum Recommended Load Pressure at Maximum Setting 3850 psi270 bar
Maximum Setting 5000 psi350 bar
Factory Pressure Settings Established at 2 in³/min.30 cc/min.
Maximum Valve Leakage at Reseat 5 drops/min.0,3 cc/min.
Adjustment - Number of Counterclockwise Turns to Increase Setting 3.753.75
Operating Characteristic StandardStandard
Reseat >85% of setting>85% of setting
Valve Hex Size 1 1/8 in.28,6 mm
Valve Installation Torque 45 - 50 lbf ft61 - 68 Nm
Adjustment Screw Internal Hex Size 5/32 in.4 mm
Locknut Hex Size 9/16 in.15 mm
Locknut Torque 80 - 90 lbf in.9 - 10 Nm
Model Weight .60 lb0,30 kg
Seal kit - Cartridge Viton: 990-202-006

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