Description

Bypass separators are used when it is considered an acceptable risk to not provide full treatment for very high flows, such as, where the risk of a large spillage and heavy rainfall occurring at the same time is small.

Typical applications include surface car parks, roadways and lightly contaminated commercial areas.

Performance & Compliance

• Fully compliant and tested to EN 858-1.
• Bypass separators are tested by British Standards institute (BSI).
• Certified flow and process performance, assessing effluent qualities to the requirements of EN 858-1.
• The unit is designed to treat the ‘first flush’ - 10% of peak flow. 
• Class I separators are designed to achieve a concentration of less than 5 mg per litre.

Benefits

• Light and easy to install.
• Inclusive of silt storage volume.
• Fitted inlet/outlet connectors.
• Vent points within necks.
• Oil alarm system available (required by EN 858-1 and PPG3).
• Extension access shafts for deep inverts.
• Maintenance from ground level.
• GRP or polyethylene construction (subject to model).

Specification

• Model Reference: NSBE025
• Material: GRP Chamber Construction
• Flow (l/s): 25
• Drainage Area (m2) PPG-3 (0.018): 13,890
• Storage Capacity (L) Silt: 2500
• Storage Capacity (L) Oil: 375
• Length (mm): 3575
• Diameter (mm): 1420
• Manhole Cover Dimension (mm): 750
• Base Inlet Invert (mm): 1680
• Base Outlet Invert (mm): 1580
• Min Inlet Invert (mm): 700
• Standard Pipework Diameter (mm): 375 (Larger pipework options available on request)