ENGINEERED Products Group (EPG) has announced the release of a new high head, high volume, mine dewatering pump. The Cornell 14NHG28 pump has a 14 inch (350mm) suction and discharge, and is capable of flows to 900L/s and heads to 130m.
At BEP (Best Efficiency Point) the pump can deliver over 600L/s at 100m of total dynamic head, making it ideal for those applications requiring the removal of a lot of water.
This 14 inch "Redi Prime" pump has what it is commonly known as an "auto prime" system which features an extremely robust and simple vacuum priming arrangement based around an integral 50cfm diaphragm vacuum pump.
The diaphragm pump evacuates air via a positive sealing float box/air separation chamber on the pump suction which prevents any water carry over into the priming system.
The air separation chamber utilises a floating ball which is connected to a mechanism that closes a peeler valve at twice the speed of the rising ball, virtually eliminating the chance of any water carry over and hence any leakage of the water being pumped.
The 14NHG is also an extremely efficient pump, (with a BEP of 83 per cent) making it economical on fuel consumption. They are so efficient, that they have been used for raw water supply and cooling water supply for power stations. Materials of construction include hard iron, 316 stainless steel, duplex stainless steel and bronze.
Standard with all Cornell Redi Prime Pumps, is the patented "Cycloseal" with "run dry option". The "Cycloseal" is a design feature which includes a dished back plate, combined with deflector vanes and pump-out vanes on the impeller.
This "system" creates a Cyclo action within the seal chamber, with the deflector vanes creating small "eddies" of low pressure. These "eddies" virtually vacuum solid particles or air away from the seal faces, where they are pumped into the discharge by the pump-out vanes on the backs of the impeller.
The "run-dry system" consists of an auxiliary gland which provides containment for a lubricant present at the inside diameter of the mechanical seal faces.
The lubricant prevents dry-running of the seal faces while priming and repriming. The run-dry gland is connected to a lubricant reservoir via inlet and outlet lines which are oriented tangential to the pump shaft so that the shaft rotation provides circulation and subsequent cooling of the lubricant.
The combination of these two systems ensure that mechanical seal life is greatly extended, minimising down time and maintenance cost, and also enables Redi Prime pumps to run on "snore" indefinitely.
Redi Prime pumps can be supplied as diesel engine drives or electric motor drives and are designed with skid bases, pontoons, or on trailers to suit each individual application. Engineered Products Group 1800 351 755.