Sun Hydraulics counterbalance cartridges, modulating devices for load holding and motion control, can be directly integrated into your actuator or applied using manifolds with many mounting options.
- Offer hose break protection
- Prevent loads from drifting
- Control overrunning loads
- Provide overcenter load control
- Protect against pressure due to thermal expansion
- Are physically interchangeable with pilot-to-open check cartridges (same number of ports, same cavities, same flow path for a given frame size)
Standard, 4000 psi Maximum Setting
- Load holding to 3000 psi with 4000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
- Back pressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the back pressure.
Standard, 5000 psi Maximum Setting
- Load holding to 3850 psi with 5000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
- Back pressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the back pressure.
Semi-Restrictive, 4000 psi Maximum Setting
- Load holding to 3000 psi with 4000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
- Back pressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the back pressure.
Semi-Restrictive, 5000 psi Maximum Setting
- Load holding to 3850 psi with 5000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
- Back pressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the back pressure.
Restrictive, 4000 psi Maximum Setting
- Restrictive valves have no relief capacity other than as a thermal relief.
- Load holding to 3075 psi with 4000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
- Back pressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the back pressure.
Restrictive, 5000 psi Maximum Setting
- Restrictive valves have no relief capacity other than as a thermal relief.
- Load holding to 3850 psi with 5000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
- Back pressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the back pressure.
Without Pilot Assist, 3 Port Cavity
- Maximum operating pressure = 4000 psi
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
- Back pressure at port 2 is directly additive to the relief setting of the valve.
Atmospherically Referenced, 3 Port Cavity
- Load holding to 3000 psi with 4000 psi valve setting for CA*A, CA*K; 4600 psi with 6000 psi valve setting for CA*G, CA*L.
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Free flow check cracking pressure = 40 psi
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
Vented, 4000 psi Maximum Setting
- Load holding to 3000 psi with 4000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Free flow check cracking pressure = 40 psi
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
Vented, 6000 psi Maximum Setting
- Load holding to 4600 psi with 6000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Free flow check cracking pressure = 40 psi
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
Vented, 6000 psi Maximum Setting
- Load holding to 4600 psi with 6000 psi valve setting
- Maximum valve leakage at reseat = 5 drops/min.
- Reseat exceeds 85% of set pressure
- Factory pressure setting established at 2 in³/min.
- Free flow check cracking pressure = 40 psi
- Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.