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Pressure reducing/relieving valve from Sun Hydraulics
Externally drained, pilot-operated pressure reducing/relieving valves reduce a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, with a full-flow relief function from port 1 to tank (port 3). Draining the pilot section at port 4 makes these valves insensitive to pressure at tank (port 3) and provides a means for remote control by pilot or 2-way valves.
Note: Data may vary by configuration. See CONFIGURATION section.
| Cavity | T-21A |
| Series | 1 |
| Capacity | 10 gpm |
| Capacity (metric) | 40 L/min. |
| Maximum Operating Pressure | 5000 psi |
| Maximum Operating Pressure (metric) | 350 bar |
| Factory Pressure Settings Established at | blocked control port (dead headed) |
| Control Pilot Flow | 7 – 10 in³/min. |
| Control Pilot Flow (metric) | 0,11 – 0,16 L/min. |
| Adjustment – No. of CW Turns from Min. to Max. setting | 5 |
| Valve Hex Size | 7/8 in. |
| Valve Hex Size (metric) | 22,2 mm |
| Valve Installation Torque | 30 – 35 lbf ft |
| Valve Installation Torque (metric) | 41 – 47 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 | 0.41 lb. |
| Model Weight (metric) | 0.19 kg. |
| Seal kit – Cartridge | Viton: 990021006 |
Control
| C | Tamper Resistant – Factory Set |
| K | Handknob |
| L | Standard Screw Adjustment |
| Y | Tri-Grip Handknob |
| W | Hex Wrench Adjustment |
Adjustment Range
| A | 100 – 3000 psi (7 – 210 bar), 200 psi (14 bar) Standard Setting |
| B | 50 – 1500 psi (3,5 – 105 bar), 200 psi (14 bar) Standard Setting |
| D | 25 – 800 psi (1,7 – 55 bar), 200 psi (14 bar) Standard Setting |
| E | 25 – 400 psi (1,7 – 28 bar), 200 psi (14 bar) Standard Setting |
| W | 150 – 4500 psi (10,5 – 315 bar), 200 psi (14 bar) Standard Setting |
| H | 30 – 3000 psi (2 – 210 bar), 200 psi (14 bar) Standard Setting |
| J | 25 – 1500 psi (1,7 – 105 bar), 200 psi (14 bar) Standard Setting |
| N | 60 – 800 psi (4 – 55 bar), 200 psi (14 bar) Standard Setting |
| Q | 60 – 400 psi (4 – 28 bar), 200 psi (14 bar) Standard Setting |
Seal Material
| N | Buna-N |
| V | Viton |
Material/Coating
| /AP | Stainless Steel, Passivated |
| /LH | Mild Steel, Zinc-Nickel |
