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Sequence valve from Sun Hydraulics
Air-controlled, pilot-operated, balanced piston sequence valves use compressed air over a diaphragm instead of an adjustable spring to control the pressure setting of the valve. The air signal is supplied through a port in the hex-end of the cartridge. They will supply a secondary circuit with flow once the pressure at the inlet (port 1) has exceeded the valve setting. The pressure setting of a sequence valve controls the pressure at port 1 relative to the pressure at the drain (port 3). These valves are insensitive to back pressure at port 2 (sequence), up to the valve setting. They may be used to regulate pressure in place of 2-port relief valves if there is pressure in the return line.
Note: Data may vary by configuration. See CONFIGURATION section.
| Cavity | T-19A |
| Series | 4 |
| Capacity | 120 gpm |
| Capacity (metric) | 480 L/min. |
| Maximum Operating Pressure | 2000 psi |
| Maximum Operating Pressure (metric) | 140 bar |
| Pilot Ratio | 20:1 |
| Factory Pressure Settings Established at | 4 gpm |
| Factory Pressure Settings Established at (metric) | 15 L/min. |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 5 in³/min. |
| Maximum Valve Leakage at 110 SUS (24 cSt) (metric) | 80 cc/min. |
| Maximum Air Pressure | 150 psi |
| Maximum Air Pressure (metric) | 10,5 bar |
| Response Time – Typical | 10 ms |
| Valve Hex Size | 1 5/8 in. |
| Valve Hex Size (metric) | 41,3 mm |
| Valve Installation Torque | 350 – 375 lbf ft |
| Valve Installation Torque (metric) | 474 – 508 Nm |
| Model Weight | 3.12 lb. |
| Model Weight (metric) | 1.41 kg. |
| Seal kit – Cartridge | Viton: 990019006 |
Control
| B | External 4-SAE Port |
Adjustment Range
| B | 50 – 1500 psi (3,5 – 105 bar) |
Seal Material
| N | Buna-N |
| V | Viton |
