Trident Oil Discriminating Pump
The Darcy Oil Discriminating Control Unit will enable a standard submersible pump to discriminate between oil and water, in order to determine and control what liquid is actually pumped.
The Environment Agency will accept any discriminating pumping system that does not discharge any oil whatsoever. To achieve this it is therefore essential that any oil, whether it be in small globules, emulsified or in a concentrated form, never enters or touches the pumps inlet.
The oil discriminating submersible pump manufactured by Darcy cleverly sits in a level of water in the bund sump that acts as a ‘shield’ protecting the pump inlet that is located at the base of the pump resting on the sump floor.
Application areas
The unit has been designed for use within any area or sump that normally collects water but potentially could contain some oil such as:
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Bunded areas surrounding Oil Storage Tanks
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Bunded areas surrounding Transformers
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Sumps or trenches in run off areas where oil could be stored or used
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Lift shafts
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Wells
The likelihood of oil being present in a bund is great, especially in the presence of older transformers or tanks that can be prone to leaking creating an ever increasing layer of oil. All tanks have the potential to rupture and there is a threat of a transformer exploding. For this reason it is essential that the full capacity of the bund is maintained at all times and rainwater is not allowed to settle.
Product options available
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Option 1 - This is recommended for use in relatively shallow sumps of less than 500mm deep.
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Option 2 - This is recommended for use in deeper sumps more than 500mm in depth.
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Option 3 - This is recommended for use in very shallow sumps less than 250mm deep or in circumstances where a float switch cannot be used.
Note : All of the above have a further option of signalling High level alarms if required.
General Operation
The electronic control unit is fitted in-line with the power supplied to the submersible pump. Three conductivity sensors are provided and should be positioned and fixed as shown in the installation manual. These sensors when immersed in a liquid, determine whether that liquid is water (a conductive liquid) or oil (a non-conductive liquid). When water is detected the pump will be allowed to operate but when oil is detected the pump will be prevented from operating.
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