Separator Range

For Light Liquid Hydrocarbon Pollution Control

Bypass Separators NSBD Range

CPC bypass separator technology sets the level of excellence in light liquid hydrocarbon pollution control.

The CPC NSBD series is one of the first full ranges of bypass separators to be performance tested to BS EN 858-1. The series incorporates a proven bypass system, unique in operational reliability. Competitive types can bypass prematurely with the risk of pollutant passing forward to outlet.

The CPC system is proven to bypass in excess of nominal flow, after oil pollutant has been diverted and entrapped in the retention chamber.

Other important features include a high discharge standard (certified to less than 5mg of pollutant per litre of effluent for Class 1 Units), integral silt holding capacity and exceptional structural integrity, a renowned feature of all CPC products.

Applications

Bypass separators are used in low risk areas ie: car parks and roadways. Bypass separators are designed to treat the first 10% of the surface water runoff. The first flush from the surface is typically the most contaminated. The runoff enters the unit where any solids present sink to the bottom and are retained in the first chamber. The oil and water pass through to the second chamber where they partially separate due to the immiscibility of the components. As rainwater builds and the surface water entering the unit exceeds the design flow, further runoff is diverted to bypass the second chamber and exit the unit.

All CPC separators are designed to meet Environment Agency PPG3 regulations that came into force in April 2006.

Full Retention Separators NS Range

Full retention separators treat the full flow that can be delivered by the drainage system, which is normally equivalent to the flow generated by a rainfall intensity of 65mm/hr. On large sites, some short term flooding may be an acceptable means of limiting the flow rate and hence the size of full retention systems.

Applications

Full Retention Separators are used in high risk spillage areas such as fuel distribution depots, vehicle workshops and disposal yards.

Performance

The NS code denotes the flow at which the separator operates. The British Standards Institute (BSI) have witnessed the performance tests of the required range of separators and have certified their performance, in relation to their flow and process performance to ensure that they met the effluent quality requirements of BS EN 858-1. Larger separator designs have been determined using the formulas extrapolated from the test range.

Each Full Retention Separator design includes the necessary volume requirements for:

• Oil separation capacity
• Oil storage volume
• Silt storage capacity
• Coalescer (Class I units only)
• Automatic closure device

CPC Full Retention Separators treat the whole of the specified flow.

Maintenance

CPC separators are specifically designed for low maintenance operation. All moving parts are minimised in the construction. The tank shell, internal piping and internal baffles are all manufactured from corrosion resistant materials. However, since the separation of pollutant is an ongoing process tanks will require periodic emptying of silt and hydrocarbons. Filters where installed, require cleaning at intervals as noted in the maintenance manual.

Should a sample point or sample chamber be fitted, visual checks will reveal any traces of pollutant in the discharge. If such traces are found the main chamber(s) should be inspected and any significant amount of floating pollutant, together with any retained solid contaminants, removed by a waste tanker at the earliest convenience. The unit should then be refilled with clean water, ready for operation.

Testing

All separators are designed to meet Environment Agency guidance document PPG3 that came into force in April 2006. It is a requirement of the Environment Agency that where possible, PPG3 compliant separators are installed.

Bypass units NSBD3, NSBD4.5, NSBD6, NSBD8, NSBD10, NSBD12, NSBD15, NSBD20 and NSBD30 have been fully tested using BSI accredited test rigs.

Bypass Separator NSBD Range Selection Chart

Full Retention Separator NS Range Selection Chart

Alarm Systems

British European Standard BS EN 858-1 and Environment Agency Pollution Prevention Guideline PPG3 requires that all separators are to be fitted with an oil level alarm system and that it should be installed and calibrated by a suitably qualified technician so that it will respond to an alarm condition when the separator requires emptying.

• Easily fitted to existing tanks
• Excellent operational range
• Visual and audible alarm
• Additional telemetry option