Grease Traps

Klargester Separator Range

 

In accordance with the Environment Agency guidelines a separator is required where there is a danger of contaminants such as oil and petrol entering a drainage system. The type of system required depends on the level of risk of pollutants entering the drainage system.

Bypass Separator

The chart below gives guidance to aid selection of the appropriate type of fuel/oil separator for use in surface water drainage systems which discharge into rivers and soakaways.

Owls Hall has a specialist team who provide technical assistance in selecting the appropriate separator for your application.

For temporary storage solutions click here.

To find the correct separator for your needs please follow the Separator Selection Flow Chart.

Separator Selection Flow Chart

Separator Selection Flow Chart

Forecourt Separator Grease Traps & Separators Full Retention Separator Bypass Separator

The above information was kindly provided by the Environment Agency.

http://publications.environment-agency.gov.uk/pdf/PMHO0406BIYL-e-e.pdf

  1. You must seek prior permission from your local sewer provider before you decide which separator to install and before you make any discharge.
  2. We suggest you consult with us prior to ordering the unit to confirm its suitability.
  3. In this case, if it is considered that there is a low risk of pollution a source control SUDS scheme may be appropriate.
  4. In certain circumstances, the sewer provider may require a Class 1 separator for discharges to sewer to prevent explosive atmospheres from being generated.
  5. Drainage from higher risk areas such as vehicle maintenance yards and goods vehicle parking areas should be connected to foul sewer in preference to surface water.
  6. In certain circumstances, a separator may be one of the devices used in the SUDS scheme. Ask us for advice. Contact us for advice.

This chart gives guidance to aid selection of the appropriate type of oil separator for use in surface water drainage systems which discharge into rivers and soakaways.

For further detailed information, please consult the Environment Agency’s Pollution Prevention Guideline No. 3. (PPG 3), which clarifies the ‘Use and design of oil separators in surface water drainage systems.’ The Environment Agency is working with the Scottish Environment Protection Agency (SEPA) and the Environment and Heritage Service in Northern Ireland in order to produce a range of Pollution Prevention Guidance Notes such as Guideline No. 3. (PPG 3).

Owls Hall Environmental’s engineers operate all over mainland Britain and can assist you in the process of choosing and installing your Separator product. Owls Hall also provides you with an after-sales package, consisting of servicing and 24 hour emergency callout should your Separator start having technical difficulties.

Which Separator do I need?

Please click a range below to see its Features and Benefits.

Bypass Separator NSBD Range

Application

Bypass separators are used when it is considered an acceptable risk not to provide full treatment, for very high flows, and are used, for example, where the risk of a large spillage and heavy rainfall occurring at the same time is small, e.g, Surface car parks, Roadways and Lightly contaminated commercial areas.

Bypass Separator

  • Light and easy to install
  • Used on low risk sites (Car Parks)
  • Sized in litres per second flow
  • Independently tested and performance sampled, certified by the BSI
  • Available in Class I and Class II formats
  • Class 1 designs includes coalescer, treating 10% of flow to achieve a concentration of 5mg/litre of oil
  • Class 2 designs to achieve concentration of 100mg/litre of oil
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Vent points within necks
  • Extension access shafts for deep inverts
  • Maintenance from ground level

What size NSBD Bypass Separator do I need?

To specify a nominal size Klargester Bypass Separator, the following information is needed:

  • The calculated flow rate (NS) or the drainage area served. Our designs are based on the assumption that any interconnecting pipework fitted elsewhere on site does not impede flow into or out of the separator
  • The required discharge standard. This will decide whether a Class I or Class II unit is required
  • The drain invert inlet depth
  • Oil alarm system available
  • Owls Hall offer a full Installation service. Please visit our Installation section for more information.
  • Pipework type, size and orientation

Bypass NSB Table

Sizes & Specifications

Nominal Size Flow (l/s) Peak Flow Rate (l/s) Drainage Area (m²) PPG3 (0.0018) Silt Storage Capacity Litres Oil Storage Capacity Litres Length Dia. Access Shaft Dia. Base to Inlet Base to Outlet Invert Standard Fall Across Unit Min. Inlet Invert Standard Pipework Dia.
NSB3 3 30 1670 300 45 1765 1225 600 1450 1350 100 500 160
NSB4 4.5 45 2500 450 68 1765 1225 600 1450 1350 100 500 200
NSB6 6 60 3335 600 90 1765 1225 750 1450 1350 100 500 200
NSB8 8 80 4445 800 120 3065 1225 750 1450 1350 100 500 225
NSB10 10 100 5560 1000 150 3915 1225 750 1450 1350 100 500 300
NSB12 12 120 6670 1200 180 3915 1225 750 1450 1350 100 500 300
NSB15 15 150 8335 1500 225 3915 1225 750 1450 1350 100 500 300
NSB18 18 180 10000 1800 270 4530 1442 600 1530 1430 100 1000 375
NSB24 24 240 13340 2400 360 3200 2012 600 2110 2010 100 1000 375
NSB30 30 300 16670 3000 450 3945 2012 600 2110 2010 100 1000 450
NSB36 36 360 20000 3600 540 4625 2012 600 2110 2010 100 1000 525
NSB55 55 550 30560 5500 825 5085 2820 600 2310 2060 250 1000 600
NSB72 72 720 40000 7200 1080 5820 2820 600 2310 2060 250 1000 675
NSB84 84 840 46670 8400 1260 6200 2820 600 2310 2010 300 1000 750
NSB96 96 960 53340 9600 1440 7375 2820 600 2310 2010 300 1000 825
NSB110 110 1100 61110 11000 1650 7925 2820 600 2360 2010 350 1000 825
NSB130 130 1300 72225 13000 1950 8725 2820 600 2360 2010 350 1000 900

This Chart is a general guide

The unit is designed to treat 10% of peak flow. The calculated drainage areas served by each separator are indicated according to the formula given by PPG3 NSB= 0.0018A(m2). Flows generated by higher rainfall rates will pass through part of the separator and bypass the main separation chamber.

Class I separators are designed to achieve a concentration of 5mg/litre of oil under standard test conditions.

Class II separators are designed to achieve a concentration of 100mg/litre of oil under standard test conditions.

Click here for enquiry.

Full Retention Separator NS Range

Application

Full Retention Separators are used in high risk spillage areas such as: Fuel distribution depots, Vehicle workshops and Scrap Yards.

Full Retention Separator

  • Light and easy to install
  • All surface water treated
  • Used on high risk sites
  • Sized in litres per second flow
  • Available in Class I and Class II formats
  • Class I designs includes coalescer and closure device, treating 100% of flow to achieve a concentration of 5mg/litre of oil
  • Class II designs to achieve concentration of 100mg/litre of oil
  • Independently tested and performance sampled, certified by the BSI
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Vent points within necks
  • Extension access shafts for deep inverts
  • Maintenance from ground level

What size Full Retention Separator do I need?

To specify a nominal size Full Retention Separator, the following information is needed:

  • The calculated flow rate (NS) or the drainage area served. Our designs are based on the assumption that any interconnecting pipework fitted elsewhere on site does not impede flow into or out of the separator.
  • The required discharge standard. This will decide whether a Class I or Class II unit is required
  • The drain invert inlet depth
  • Oil alarm system available
  • Owls Hall offer a full Installation service. Please visit our Installation section for more information.
  • Pipework type, size and orientation

Full Retention Separator NS Table

Sizes & Specifications

Unit Nominal Size Flow (l/s) Drainage Area (m²) PPG3 (0.018) Silt Storage Capacity Litres Oil Storage Capacity Litres Length Unit Dia. Access Shaft Dimensions Base to Inlet Base to Outlet Invert Min. Inlet Invert Standard Pipework Dia.
NS3 3 170 300 30 1760 1225 600 x 900 1050 1000 500 200
NS6 6 335 600 60 1760 1225 600 x 900 1050 1000 500 200
NS10 10 555 1000 100 2610 1225 600 x 900 1050 1000 500 200
NS15 15 835 1500 150 3910 1225 600 x 900 1050 1000 500 200
NS20 20 1115 2000 200 3200 2010 600 1850 1800 1000 200
NS30 30 1670 3000 300 3915 2010 600 1850 1800 1000 315
NS40 40 2225 4000 400 4360 2010 600 1850 1800 1000 315
NS50 50 2780 5000 500 5425 2010 600 1810 1760 1000 315
NS65 65 3610 6500 650 6850 2010 600 1810 1760 1000 315
NS80 80 4445 8000 800 5700 2820 600 2500 2450 1000 315
NS100 100 5560 10000 1000 6200 2820 600 2500 2450 1000 315
NS125 125 6945 12500 1250 7365 2820 600 2500 2450 1000 450
NS150 150 8335 15000 1500 8675 2820 600 2550 2450 1000 450
NS175 175 9725 17500 1750 9975 2820 600 2550 2450 1000 450
NS200 200 11110 20000 2000 11280 2820 600 2550 2450 1000 450

This Chart is a general guide

Click here for enquiry

Washdown & Silt Separator

Application

This unit can be used in areas such as car wash and other cleaning facilities that discharge directly into a foul drain, which feeds to a municipal treatment facility. If emulsifiers are present the discharge must not be allowed to enter a NS Class I or Class II unit.

The main applications for the Washdown & Silt Separator are:

Washdown & Silt Separator

  • Car wash
  • Tool hire depots
  • Truck cleansing
  • Construction compounds cleansing points
  • Light and easy to install
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Vent points within necks
  • Extension access shafts for deep inverts
  • Maintenance from ground level

Silt Trap

Silt Traps

  • Designed for use before a separator in car wash applications to ensure effective
    silt removal.
  • Galvanised heavy duty cover
  • Light and easy to install
  • Maintenance from ground level

Owls Hall offer a full Installation service. Please visit our Installation section for more information.

What size Washdown & Silt Separator do I need?

Washdown & Silt Separator Table

Sizes & Specifications

Ref Total Capacity (Litres) Max. Rec. Silt Max. Flow Rate (l/s) Length Diameter Access Shaft Dia. Base to Inlet Invert Base to Outlet Invert Standard Fall Across Unit Min. Inlet Invert Standard Pipe work Diameter Approx Empty (Kg.)
W1/012 1200 600 3 1310 1225 460 1150 1100 50 500 160 60
W1/020 2000 1000 5 2210 1225 460 1150 1100 50 500 160 120
W1/030 3000 1500 8 3060 1225 460 1150 1100 50 500 160 150
W1/040 4000 2000 11 3910 1225 460 1150 1100 50 500 160 180
W1/060 6000 3000 16 4530 1440 600 1360 1360 50 500 160 320
W1/080 8000 4000 22 3200 2020 600 2005 1955 50 500 160 585
W1/100 10000 5000 27 3915 2020 600 2005 1955 50 500 160 680
W1/120 12000 6000 33 4640 2020 600 2005 1955 50 500 160 770
W1/150 15000 7500 41 5435 2075 600 1940 1890 50 500 160 965
W1/190 19000 9500 52 6865 2075 600 1940 1890 50 500 160 1200

This Chart is a general guide

Grease Traps & Separators

Applications

Grease Trap

Grease Traps: An effective and hygienic method of separating fat and grease from waste water flow.

Grease traps will, by the removal of fat and grease:

  • Greatly reduce incidents of blocked drains from catering establishments
  • Improve the performance of septic tanks and field drains
  • Prevent contamination of small sewage treatment plants

Grease traps are designed for small restaurants, public houses and canteens.

Grease Separator

Grease Separators: For applications such as larger restaurants, hotels, etc. where a grease separator should be considered to give additional volume.

Owls Hall offer a full Installation service. Please visit our Installation section for more information.

What size Grease Trap or Grease Separator do I need?

Grease Trap Table

Trap Model No. Grease Capacity Dimensions Weight Empty / Full (kgs)
A Length B Length C Length
2 23 1330 850 1035 50 / 475
4 45 2070 1200 1335 120 / 1410

This Chart is a general guide

Grease Separator Table

Separator Model Dimensions Working Capacity Approx. Weight Fall Across Unit
A B Empty Full
G2B020 2210 1340 2000 litres 100kg 2200kg 50
G2B030 3060 2190 3000 litres 130kg 3180kg 50
G2B040 3910 3040 4000 litres 160kg 4160kg 50

This Chart is a general guide

Forecourt Separator

Application

The forecourt separator is designed for installation in petrol filling station forecourts and similar applications. The function of the separator is to intercept hydrocarbon pollutants such as petroleum and oil and prevent their entry to the drainage system, thus protecting the environment against hydrocarbon contaminated surface water run-off and gross spillage.

Forecourt Separator

  • Light and easy to install
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Vent points within necks
  • Extension access shafts for deep inverts
  • Maintenance from ground level
  • Class I and Class II design
  • Oil storage volume
  • Coalescer (Class I unit only)
  • Automatic closure device
  • Oil alarm system availble

Owls Hall offer a full Installation service. Please visit our Installation section for more information.

What size Forecourt Separator do I need?

Forecourt Separator Table

Sizes & Specifications

Enviroceptor Class Backfill Type Total Cap. (L) Drainage Area (m²) Max. Flow Rate (l/s) Length Dia Access Shaft Dia Base to Inlet Invert Base to Outlet Invert Std. Fall Across Unit Min. Inlet Invert Std. Pipe-work Empty weight (Kg.)
I Concrete 10000 720 15 3915 2020 600 2180 2130 50 600 160 620
II Concrete 10000 720 15 3915 2020 600 2180 2130 50 600 160 620

This Chart is a general guide

The unit should be installed on a suitable concrete base slab and surrounded with a concrete backfill. Structural grade units can also be supplied suitable for installation within a granular backfill (i.e. pea gravel). Please specify unit required when ordering. If the separator is to be installed within a trafficked area, then a suitable cover slab must be designed to ensure that loads are not transmitted to the unit. The separator should be installed and vented in accordance with Health and Safety Guidance Note HS(G)41 for filling stations, subject to Local Authority requirements.

All Klargester products have a full initial 12 month warranty covering all mechanical and electrical components against malfunction, provided the unit has not been subject to damage or abuse.