22981R-40
This is a pressure-actuated unloader that is designed for any pump that fits within the flow and pressure range of the unloader. The unloader regulates the flow in the system and maintains system pressure via an adjustable nut that controls the amount of tension on a pressure spring. When no flow is going out the outlet port, all flow is diverted to the bypass port at virtually no pressure. The unloader is capable of handling one or more shut-off guns and should be run with no bypass (if the full flow from the pump is going through the unloader). It actuates at around 10% above the system pressure.
WARNING: This product might contain a chemical known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
| Specification | US | Metric |
|---|---|---|
| Minimum Flow | 2.1 GPM | 8 L/min |
| Maximum Flow | 79.3 GPM | 300 L/min |
| Min Pressure | 580 PSI | 40 bar |
| Max Pressure | 2175 PSI | 150 bar |
| Continuous Temperature | 150 °F | 70 °C |
| Inlet Port | 1" BSP | |
| Outlet Port | 1" BSP | |
| Bypass Port | 3/4" BSP | |
| Weight | 15.4 lbs. | 7 kg |
| ITEM# | PART# | DESCRIPTION | Qty. |
|---|---|---|---|
| Repair Kit – Part #09578-40 | |||
| 14 | 13247 | Piston | 1 |
| 15 | 05256 | Seal Support | 1 |
| 16 | 12021 | Hexagon Nut | 1 |
| 18 | 13012 | O-Ring | 1 |
| 20A | 07281 | O-Ring | 1 |
| 21 | 07840 | Support Ring | 1 |
| 21A | 13253 | Support Ring | 1 |
| 22 | 13254 | Seal Pack | 1 |
| 22A | 13255 | Seal Pack | 1 |
| 23 | 13256 | Valve Seat | 1 |
| 25 | 12057 | O-Ring | 1 |
| 26 | 12055 | O-Ring | 1 |
| 28B | 07653 | O-Ring | 1 |
Materials
Our Company
For 50 years, Giant Pumps has offered the most dependable positive displacement high-pressure triplex pumps available. Designed and built to the highest quality standards, customers count on Giant Pumps products to keep their equipment running. Every design detail of Giant Pumps products is optimized for long-life and reliable performance, making Giant Pumps the most trusted name in high-pressure pumps and systems.