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Relief valve from Sun Hydraulics
Ventable, pilot-operated, balanced piston relief cartridges are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. They provide a vent port (port 3) that connects between the main piston and pilot stage to provide for remote control by other pilot or 2-way valves. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast.
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 | 5000 psi |
| Maximum Operating Pressure (metric) | 350 bar |
| Factory Pressure Settings Established at | 4 gpm |
| Factory Pressure Settings Established at (metric) | 15 L/min. |
| Control Pilot Flow | 15 – 20 in³/min. |
| Control Pilot Flow (metric) | 0,25 – 0,33 L/min. |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 5 in³/min.@1000 psi |
| Maximum Valve Leakage at 110 SUS (24 cSt) (metric) | 80 cc/min.@70 bar |
| Response Time – Typical | 10 ms |
| Adjustment – No. of CW Turns from Min. to Max. setting | 5 |
| 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 |
| 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 | 3.16 lb. |
| Model Weight (metric) | 1.43 kg. |
| Seal kit – Cartridge | Viton: 990019006 |
Control
| L ★ | Standard Screw Adjustment |
| C | Tamper Resistant – Factory Set |
| K | Handknob |
Adjustment Range
| A ★ | 100 – 3000 psi (7 – 210 bar), 1000 psi (70 bar) Standard Setting |
| W ★ | 150 – 4500 psi (10,5 – 315 bar), 1000 psi (70 bar) Standard Setting |
| B | 50 – 1500 psi (3,5 – 105 bar), 1000 psi (70 bar) Standard Setting |
| C | 150 – 6000 psi (10,5 – 420 bar), 1000 psi (70 bar) Standard Setting |
| D | 25 – 800 psi (1,7 – 55 bar), 400 psi (28 bar) Standard Setting |
| E | 25 – 400 psi (1,7 – 28 bar), 200 psi (14 bar) Standard Setting |
| N | 60 – 800 psi (4 – 55 bar), 400 psi (28 bar) Standard Setting |
| H | 30 – 3000 psi (2 – 210 bar), 1000 psi (70 bar) Standard Setting |
Seal Material
| N ★ | Buna-N |
| V | Viton |
| E | EPDM |
Material/Coating
| /AP | Stainless Steel, Passivated |
| /LH | Mild Steel, Zinc-Nickel |
