Oakstown oil water separators conform to the European standard EN 858 for the design and use of prefabricated oil separators.
All separators fulfil European standards achieving results of oil removal much lower than 5 mg/L.
Oakstown oil water separators conform to the European standard EN 858 for the design and use of prefabricated oil separators.
All separators fulfil European standards achieving results of oil removal much lower than 5 mg/L.
Oil water separators are in two classes, based on performance under the BS EN 858 standard testing:
Class 1: designed to achieve a discharge concentration of less than 5 mg/litre of oil under standard test conditions. These separators are required for discharges to surface water drains and the water environment.
Class 2: designed to achieve a discharge concentration of less than 100 mg/litre of oil under standard test conditions. They are suitable for dealing with discharges where a lower quality requirement applies such as discharges to the foul sewer (check with sewer provider).
Both classes can be produced as ‘full retention’, ‘bypass’ or ‘forecourt’ separators.
We offer a number of types of Oil Water Separators:
Full Retention Separators
The ‘full flow’ is normally equivalent to the flow generated by a rainfall intensity of 65 mm/hour.
Full retention separators are used where there is a risk of regular contamination with oil and a foreseeable risk of significant spillages e.g. vehicle maintenance areas and retail fuel forecourts.
Bypass Separators
Bypass separators treat all flows generated by rainfall rates of up to 6.5 mm/hour, covering most rainfall events. Flows above this rate bypass the separator.
These separators are used when it is considered an acceptable risk not to provide full treatment for high flows, e.g. where only small spillages can occur and the risk of spillage is small.
It is not acceptable to use a by-pass separator where a large spillage might occur.
Forecourt Separators
The term ‘forecourt’ refers to all forms of liquid-fuel dispensing outlets, both retail and non-retail, including those where only diesel is dispensed.
A forecourt separator must be a ‘full retention’ separator, large enough to serve the catchment area of the site and have a sufficient oil storage volume to retain any foreseeable spillages.
On a forecourt where tanker deliveries are received, a separator with an oil storage capacity of 7,600 litres will meet the requirements of BS EN 858-2.
Wash-down Separators
Wash-down separators are generally used in areas such as car/truck wash and various cleaning systems that discharge directly into a municipal treatment facility.
Discharges from wash-down separators must not be allowed to enter the surface water drainage system or a fuel/oil separator.
The likely presence of emulsifiers such as detergents will disperse oils and will reduce the separation efficiency of all separators.
See also products our group websites O’Reilly Concrete and Barleystone
Contact us with any enquiries about our commercial products.
Oil water separator being lifted in by O’Reilly Oakstown
Oil water separator being installed by O’Reilly Oakstown
