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Oil Separators are also knows as Petrol Interceptors or Hydrocarbon Separators.


There are three main type of oil separator in relation to drainage system, the By-pass Separator, the Full Retention Oil Separator and the Wash-bay Separator. Both the By-pass Separator and the Full Retention Oil Separator come in class 1 and class 2. The class 1 separators have a higher quality of filtration then the class 2 separators. You should seek the advice of your local authority on which type of oil separator to use. In order to comply with European Standard EN858 the oil separator should be fitted with a hydrocarbon alarm.


The By-pass Separator is generally use for car-parking areas and roads. The size of the separator is calculated by the catchment area. To calculate the NBS, Nominal Bypass Size, you multiply the total square metres of the catchment area by 0.0018 (eg. 2,000m² x 0.0018 = NSB3.6).

The Geoceptor is the smallest HDPE bypass separator on the market and is fully tested to comply with EN858-1. The Geoceptor is available with or without silt storage but to comply with EN858-1 they must have silt storage in the separator or upstream of the separators and have a hydrocarbon alarm fitted.

A: Top to invert B: Invert to base C: Overall Length including space between tanks D: Overall Height E: Width or diameter


A

ABC

D

E

C

B

D

Superceptor is Full Retention Oil Separator also available as a Forecourt Separator.

The Euroceptor is a by-pass separator available class 1 or class 2 with or without silt storage. The range start with the NSB1.5 which covers a drainage area of 833 square meters to the NSB120 which covers a drainage area of 66,640 square meters. Larger Separators can be made to order but on a large site it is recommend to have a number of small separators close to the sores them one large separator at the end of the site. More information is coming shortly.


Number

Drainage

Treated

Peak

Oil

Silt Storage

Max Silt



Dimensions



Pipework


of Tanks

Area

Flow

Flow

Storage

Required

Storage

A

B

C

D

E

Size



mm

L/sec

L/sec

Liters

Liters

Litres

mm

mm

mm

mm

mm

Range

NSB3.5

1

1950

3.5

35

52.5

350

up stream

580

1150

1260

1730

1260

110 to 300

NSB3.5/Silt

2

1950

3.5

35

52.5

350

1300

580

1150

2700

1730

1260

110 to 300

NSB4.5

1

2500

4.5

45

67.5

450

up stream

580

1150

1260

1730

1260

110 to 300

NSB4.5/Silt

2

2500

4.5

45

67.5

450

1300

580

1150

2700

1730

1260

110 to 300

NSB6

1

3333

6

60

90

600

up stream

580

1150

1260

1730

1260

110 to 375

NSB6/Silt

2

3333

6

60

90

600

1300

580

1150

2700

1730

1260

110 to 375

NSB8

1

4444

8

80

120

800

up stream

580

1150

1260

1730

1260

110 to 375

NSB8/Silt

2

4444

8

80

120

800

1300

580

1150

2700

1730

1260

110 to 375

NSB10

1

5560

10

100

150

1000

up stream

580

1650

1260

2230

1260

110 to 450

NSB10/Silt

2

5560

10

100

150

1000

2100

580

1650

2700

2230

1260

110 to 450

NSB12.5

1

6944

12.5

125

187.5

1250

up stream

580

1650

1260

2230

1260

110 to 450

NSB12.5/Silt

2

6944

12.5

125

187.5

1250

2100

580

1650

2700

2230

1260

110 to 450

NSB15

1

8000

15

150

225

1500

up stream

580

1650

1260

2230

1260

110 to 450

NSB15/Silt

2

8000

15

150

225

1500

2100

580

1650

2700

2230

1260

110 to 450

NSB18

1

10000

18

180

270

1800

up stream

580

2050

1560

2630

1560

110 to 450

NSB18/Silt

2

10000

18

180

270

1800

3000

580

2050

3370

2630

1560

110 to 450

The Full Retention Oil Separator is use where there is a high risk of a spillage. The Full Retention Oil Separator is size by firstly the volume of potential spillage and secondly the catchment area (multiplied by 0.018). We would recommend if possible minimizing the size of the high risk catchment area.   


The Wash-bay Separator is mainly use for car and truck wash areas. The Wash-bay Separator should only be discharged in to foul sewers, if there is no foul sewer the water should be treated so that it is able to be reuse for washing the cars or trucks.