| Description | Unit |
| Water consumption | 1.5 ℓ/sec |
| Air delivery pressure | 300 kPa - no flow; loader valve closed |
| Loader valve open | 180 kPa - max flow |
| Hole cleaning time | 3 to 6 sec |
| Hole loading time | 3 to 4 sec for 0.8 kg anfo for 38 mm x 1.2 m hole length (stope) 8 to 12 sec for 2.4 kg for 38 mm x 3 m hole (development end) |
| Height | 900 mm |
| Diameter | 220 mm |
| Mass | 11 kg excluding hose |
| Recommended outlet hose | 25NB x 15 m mine hose |
| Charging hose | 19NB x 7.5 m anti-static hose |
| Power source - hydropower | 140 to 180 bar |
Purpose
The Pump Control Valve, Non-Return Valve, Surge Relief Valve, Air Admission Valve and Surge Anticipation Valve protect against a pump motor trip out and minimize pressure surges (water hammer) in pipelines, typically on a mine dewatering system. A column Drain Valve and Dissipator are usually incorporated to drain the column. Pump column protection is required on every mine dewatering system to eliminate/minimise the risk of bursting a pipe due to pressure spikes (water hammer) caused by:
- High velocities
- Rapid velocity changes
- Separation cavitation changes
- Uncontrolled pump stop (trip)
- Uncontrolled pump start (valve open)
- Poor valve selection, setting or maintenance
- Inadequate selection, setting or maintenance
- Rapid closing/opening or worn Pump Control Valve
- Non Return Valve slam/reverse velocity
- No Air Admission Valve
HPE can offer a full system that includes
- Pump Column Control Valve
- Manual Isolation (Column Drain Valve)
- Surge Relief Valve
- Non Return Valve
- Air Admission Valve
- Energy Dissipator
- Surge Anticipation System