DrainEezy® Bund Filters

The primary filtration product at the heart of the DrainEezy system.

Powered by Green Rhino’s Smart Filtration Technology, the DrainEezy Bund Filter permanently converts hydrocarbon contamination into a non-leaching solid, ensuring only clean water discharges from your bund.

Available in six variants to address the specific chemical composition of transformer oil types and contamination profiles found across electrical infrastructure.

Key Features

  • Smart Filtration Technology Hydrocarbon Removal: The Smart Filtration Technology absorbs oil and permanently converts it to a non-leaching solid. Oil cannot escape under pressure, rain dilution or physical disturbance. Removes hydrocarbons to below 5 ppm.
  • Automatic Seal: In the event of a catastrophic oil leak, or if the filter reaches its capacity, it will automatically seal, preventing the escape of mineral / ester oil into the environment.
  • Low Maintenance Design: Passive operation. The filter performs without mechanical components, power supply or frequent intervention. Periodic inspection recommended.
  • 6 Variants for Different Oil Types: Formulated specifically for mineral oil, ester oil and creosote.
  • Fully Compatible with DrainEezy System: Works seamlessly with the Debris Guard, Pre-Filter, Fitting Kit, Manifold, Bund Alarm and Filtration Chamber to create a complete bund management system.
  • Breach Tested Under Head Pressure: Independently verified and tested under worst-case conditions: full oil inundation with constant head pressure. A filter that holds under this load holds under all field conditions.

 

Application:

Solar Farm • Wind Farm • Data Centre • Battery Energy Storage Systems (BESS) • Electricity Distribution Substations • Trackside Infrastructure

DrainEezy Bund Filters Brochure
DrainEezy Bund Filter Installation Guide V1.3
DrainEezy® Bund Filters Installation and Servicing Guide

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Specification

CODE PRODUCT NAME HYDROCARBON TYPE CAPACITY FITTING
GRR 03 00 00 HRC DrainEezy Bund Filter M1.5 Mineral Oil Up to 1L Oil 1.5” Thread
GRR 03 00 20 HRC DrainEezy Bund Filter M2 Mineral Oil Up to 2L Oil 2” Thread
GRR 03 10 03 HRF DrainEezy Bund Filter M4 Mineral Oil Up to 14L Oil 4” Thread
GRR 03 10 02 HRF DrainEezy Bund Filter M4 Mineral Oil Up to 14L Oil 4” Cam Lock
GRR 03 01 01 ERC DrainEezy Bund Filter E1.5 Ester Oil (FR3, Midel) Up to 1.5L Oil 1.5” Thread
GRR 03 00 02 CRC DrainEezy Bund Filter C1.5 Creosote Up to 1L Oil 1.5” Thread
GRR 03 00 22 CRC DrainEezy Bund Filter C2 Creosote Up to 2L Oil 2” Thread

 

Video

Product Overview

How do DrainEezy Transformer Bund Filters work?

DrainEezy Bund Filters contain smart polymers which extract hydrocarbons from the flow of water. The polymers transform the liquid hydrocarbons into a rubber-like solid, trapping the pollutants inside the filter. When the filter reaches its capacity, the solidified pollutants block the cartridge. This prevents the escape of contaminants when the filter needs replacing. In the event of a catastrophic breach and the filter becoming inundated with hydrocarbons, it will seal before any oil can leak out.

Smart polymers offer two distinct benefits over activated carbon. Firstly, smart polymers can be blended to target specific hydrocarbons. Indeed, our mineral oil filter contains a different blend of smart polymers to our ester oil filter. Secondly, activated carbon will leak when saturated with hydrocarbons whereas smart polymers will not.

How cost-effective are DrainEezy Transformer Bund Filters?

For low-risk scenarios where leakage or a catastrophic breach is highly unlikely, more elaborate systems like oil water separators are expensive and unnecessary. DrainEezy filters are low-cost to purchase, install and maintain.

These filters require only a port on the side of the bund. Installation and replacement takes no more than a couple of minutes and requires no specialist knowledge. With no power requirements and no moving parts, minimal maintenance is required making the filters ideal for remote and infrequently-visited locations.

Where can I use a DrainEezy Bund Filter?

Environmental regulations require containers or equipment filled with oil-based liquids to be situated on or in a secondary containment bund. Electrical transformers may be situated inside a concrete bund or may have an integral bund. Containers of oils and fuels may be stored on bunded pallets or flooring.

If situated outdoors, these bunds can fill with rainwater which will mix with any leaked or spilt hydrocarbons. This creates a pool of contaminated water which, if allowed to overflow, would pollute the environment (and render the bund pointless).

DrainEezy Bund Filters provide the solution, neutralising the hydrocarbon contaminants as the bund water drains freely into the environment. They are commonly used as transformer bund filters, particularly on new transformers where the leakage risk is minimal.

Another popular application is for bunds used for the temporary storage of oils, fuels and other hydrocarbon-based liquids. Note that with bulk storage of hazardous liquids, The Control of Pollution (Oil Storage) (England) Regulations 2001 do not permit a drainage device to be ported to a bund wall. There are exceptions to this so we recommend that you read the regulations to see if they apply to you or contact the Environment Agency for advice. Read our blog piece on this subject.

Which pollutants will DrainEezy Transformer Bund Filters capture?

Our standard transformer bund filter is for use with a range of hydrocarbons including mineral transformer oil, engine oil, petrol and diesel. We also have a separate filter for use with ester oils, specifically Midel 7131 synthetic ester oil and FR3 natural ester fluid.

FAQs

How will I know when a filter needs replacing?

An accumulation of water in the bund indicates that the filter needs replacing. Check first, however, that the drainage outlet on the inside of the bund isn’t blocked with debris. If fitted to a transformer bund, your remote monitoring system may indicate a rapid drop in oil levels which will suggest that the filter has been called into action and needs changing.

How long will a DrainEezy Bund Filter last?

The lifespan of a DrainEezy Bund Filter depends entirely on the volume of hydrocarbons absorbed and at what rate. The stated capacity relates to the volume of oil that can be retained if a ‘clean’ filter is inundated. If a filter only ever receives smaller doses of diluted hydrocarbons over a period of time then it may block anywhere between half and full capacity. On a new transformer bund, for example, where there is a low risk of leaks, spills or a breach, a filter could last for years.

Do DrainEezy Bund Filters represent a safety risk?

By transforming hazardous liquids into non-hazardous solids, DrainEezy oil removal filters are decreasing the risk on your site. The solidified hydrocarbons have lower flammability and off-gassing properties than liquid oils and fuels. The smart polymer inside the filters poses no health and safety issues to maintenance operatives. Spent filters can be disposed of in standard hazardous waste bins.

“For low-risk sites, Green Rhino’s DrainEezy Filters are a game changer”

Independent Connections Provider

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