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Load holding valve from Sun Hydraulics.
Counterbalance valves without 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 relief valve controls flow from port 1 to port 2.
Note: Data may vary by configuration. See CONFIGURATION section.
| Cavity | T-2A |
| Series | 2 |
| Capacity | 30 gpm |
| Capacity (metric) | 120 L/min. |
| Maximum Operating Pressure | 5000 psi |
| Maximum Operating Pressure (metric) | 350 bar |
| Pilot Ratio | Zero |
| Maximum Recommended Load Pressure at Maximum Setting | 3075 psi |
| Maximum Recommended Load Pressure at Maximum Setting (metric) | 215 bar |
| Maximum Setting | 4000 psi |
| Maximum Setting (metric) | 280 bar |
| Factory Pressure Settings Established at | 2 in³/min. |
| Factory Pressure Settings Established at (metric) | 30 cc/min. |
| Maximum Valve Leakage at Reseat | 5 drops/min. |
| Maximum Valve Leakage at Reseat (metric) | 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 | 1 1/8 in. |
| Valve Hex Size (metric) | 28,6 mm |
| Valve Installation Torque | 45 – 50 lbf ft |
| Valve Installation Torque (metric) | 61 – 68 Nm |
| Adjustment Screw Internal Hex Size | 5/32 in. |
| Adjustment Screw Internal Hex Size (metric) | 4 mm |
| Locknut Hex Size | 9/16 in. |
| Locknut Hex Size (metric) | 15 mm |
| Locknut Torque | 80 – 90 lbf in. |
| Locknut Torque (metric) | 9 – 10 Nm |
| Model Weight | 0.62 lb. |
| Model Weight (metric) | 0.28 kg. |
| Seal kit – Cartridge | Viton: 990202006 |
Control
| C | Tamper Resistant – Factory Set |
| L | Standard Screw Adjustment |
Functional Setting Range
| A | 1000 – 4000 psi w/4 psi Check (70 – 280 bar w/ 0,3 bar Check), 3000 psi (210 bar) Standard Setting |
| B | 400 – 1500 psi w/4 psi Check (28 – 105 bar w/ 0,3 bar Check), 1000 psi (70 bar) Standard Setting |
| H | 1000 – 4000 psi w/25 psi Check (70 – 280 bar w/ 1,7 bar Check), 3000 psi (210 bar) Standard Setting |
| I | 400 – 1500 psi w/25 psi Check (28 – 105 bar w/ 1,7 bar Check), 1000 psi (70 bar) Standard Setting |
Seal Material
| N | Buna-N |
| V | Viton |
Material/Coating
| /LH | Mild Steel, Zinc-Nickel |
