Transcript
Operating the water pump
Recycling water in the stonemasonry workshop
Operating the water pump
• Water is needed during stonemasonry operations to – Control dust hazard– Cool cutting and grinding tools– Lubricate honing and polishing processes– Clean work area
• Recycled water is contaminated with sediment and must NOT be allowed to exit the property
you must complete an induction before using this equipment
Operating the water pump
• The pump recirculates water around the stonemasonry wet area
• The water returns to the sump
• The sump acts as a water reservoir and settlement pond for the sediment
• The sump is topped up with town water during use
• The sump is accessed by a lid
Operating the water pump
• The electrically powered pump draws water from a sump, through a foot valve inlet
• The sump holds approx. 3600 litres and requires occasional topping up
• The water level must always be above the foot valve inlet, to avoid “cavitation” (sucking air)
• The top up tap maintains the water level• Closing the top up tap after use prevents water
wastage in case of hose failure• Opening the pump outlet prevents overheating
the pump when it is running
Operating the water pump
• Water supply must be– Reliable
• Keep the sump full of water• Maintain the pump
– Clean• Clean the filters regularly• Empty sediment from the sump regularly
– Environmentally friendly• Ensure NO overflow to stormwater or sewer• Minimise water wastage
Operating the water pump
Operating the water pump
About 450
About 450
Shutting the pump down
• It’s easy – just reverse the start up order
Review
1. Why is water needed in the stonemasonry workshop?
Review
1. Why is water needed in the stonemasonry workshop?
• To cool, lubricate and clean during stonemasonry processing
• To control dust
Review
2. Why must the sump water level be maintained at near-full?
Review
2. Why must the sump water level be maintained at near-full?
• To avoid cavitation (sucking air)
Review
3. Why is it important to prevent overflow into drains?
Review
3. Why is it important to prevent overflow into drains?
• So that contaminated water does not leave the property via stormwater drain or sewer
Review
4. How is sediment removed from the water?
Review
4. How is sediment removed from the water?
• By settlement in the sump
Review
5. List the start-up procedure in correct order
Review
5. List the start-up procedure in correct order
• Open top up tap
• Open pump overflow halfway
• Switch pump on
Review
6. What must be checked before starting the pump?
Review
6. What must be checked before starting the pump?
• Check that the water level is well above the foot valve
Review
7. Why is it important to close the top up tap during shut down?
Review
7. Why is it important to close the top up tap during shut down?
• To avoid water wastage in case of hose failure
Review
8. When the pump is running, why must the pump outlet be open?
Review
8. When the pump is running, why must the pump outlet be open?
• To avoid overheating the pump
Review
9. The sump lid should be kept closed at all times – except when….
Review
9. The sump lid should be kept closed at all times – except when….
• Checking the water level
• Maintaining the pump
• Emptying the sump
Review
10.List the shut down procedure in correct order
Review
10.List the shut down procedure in correct order
• Switch pump off
• Close pump overflow
• Close top up tap