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| Additional Information | : | Vented, 1-5/8 in Hex Size, 350 to 375 lbf Torque Rating |
| Flow Rate | : | 120 gpm |
| Number of Ports/Ways | : | 3 |
| Pressure Rating | : | 6000 psi |
| Seal Material | : | Buna-N |
Atmospherically vented 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. Backpressure at port 2 does not affect the valve setting because the spring chamber is atmospherically referenced. Other names for this valve include motion control valve and over-center valve.
Sun Hydraulics® Counterbalance Valve, 6000 psi, 120 gpm Flow Rate, Number of Ports/Ways: 3, Buna-N Seal, Additional Information: Vented, 1-5/8 in Hex Size, 350 to 375 lbf Torque Rating
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure