Compressed Air Condensate Treatment

Oil Water Separators

Tanair condensate treatment systems for separating compressor lubricant from water produced by oil-injected compressed-air installations.

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Oil Water Separators from 60 to 2500 CFM

Oil-injected compressors produce condensate containing water, lubricant and airborne contamination. An oil-water separator treats this waste stream before disposal.

The current range contains two Tanair separator families: the newer TAN range and the BOW range. The newer Tanair TAN systems are shown first, followed by the BOW models.

Correct selection should consider the combined airflow of every compressor feeding the separator, lubricant type, operating hours, ambient conditions and expected condensate volume.

60–2500 CFM

12 Live Separators

Newer TAN Range First

Workshop to Industrial

UK Technical Support

Live Condensate Treatment Range

Shop Oil Water Separators

The newer Tanair TAN separator family is shown first in capacity order, followed by the BOW family from 60 to 2500 CFM.

If one separator serves several compressors, size it for the combined installation rather than the airflow of an individual machine.

Condensate Systems
Tanair TAN300 | 0 – 300 CFM Oil Water Separator

Tanair TAN300 oil-water separator for compressed-air systems up to 300 CFM. Carbon-free filtration media, no pre-soaking, up to 4,000-hour service life (application dependent) and less than 10 ppm residual oil discharge under suitable conditions.

£337.68 exc vat. Add to basket
In Stock
£337.68 exc vat.
Condensate Systems
Tanair TAN750 | 0 – 750 CFM Oil Water Separator

Tanair TAN750 oil-water separator for compressed-air systems up to 750 CFM. Carbon-free filtration media, no pre-soaking, up to 4,000-hour service life (application dependent) and less than 10 ppm residual oil discharge under suitable conditions.

£525.80 exc vat. Add to basket
In Stock
£525.80 exc vat.
Condensate Systems
Tanair TAN2TANDEMOWS | 0 – 1500 CFM Oil Water Separator

Tanair TAN2TANDEMOWS oil-water separator for compressed-air systems up to 1500 CFM. Carbon-free filtration media, no pre-soaking, up to 4,000-hour service life (application dependent) and less than 10 ppm residual oil discharge under suitable conditions.

£1,063.29 exc vat. Add to basket
In Stock
£1,063.29 exc vat.
Sale!
Condensate Systems
Tanair BOW-S60S | 60 CFM Oil Water Separator

Tanair BOW-S60S oil-water separator for compressed-air systems up to 60 CFM. Designed to treat oil-contaminated condensate from compatible oil-injected compressors using the correct condensate-management setup.

Original price was: £96.00.Current price is: £78.24. exc vat. Add to basket
In Stock
Original price was: £96.00.Current price is: £78.24. exc vat.
Sale!
Condensate Systems
Tanair BOW-S120S | 120 CFM Oil Water Separator

Tanair BOW-S120S oil-water separator for compressed-air systems up to 120 CFM. Designed to treat oil-contaminated condensate from compatible oil-injected compressors using the correct condensate-management setup.

Original price was: £356.00.Current price is: £290.14. exc vat. Add to basket
In Stock
Original price was: £356.00.Current price is: £290.14. exc vat.
Sale!
Condensate Systems
Tanair BOW-S360S | 360 CFM Oil Water Separator

Tanair BOW-S360S oil-water separator for compressed-air systems up to 360 CFM. Designed to treat oil-contaminated condensate from compatible oil-injected compressors using the correct condensate-management setup.

Original price was: £506.00.Current price is: £412.39. exc vat. Add to basket
Available to Order
Original price was: £506.00.Current price is: £412.39. exc vat.
Sale!
Condensate Systems
Tanair BOW-S900S | 900 CFM Oil Water Separator

Tanair BOW-S900S oil-water separator for compressed-air systems up to 900 CFM. Designed to treat oil-contaminated condensate from compatible oil-injected compressors using the correct condensate-management setup.

Original price was: £766.00.Current price is: £624.29. exc vat. Add to basket
In Stock
Original price was: £766.00.Current price is: £624.29. exc vat.
Sale!
Condensate Systems
Tanair BOW-S1250S | 1250 CFM Oil Water Separator

Tanair BOW-S1250S oil-water separator for compressed-air systems up to 1250 CFM. Designed to treat oil-contaminated condensate from compatible oil-injected compressors using the correct condensate-management setup.

Original price was: £1,454.00.Current price is: £1,185.01. exc vat. Add to basket
Available to Order
Original price was: £1,454.00.Current price is: £1,185.01. exc vat.
Sale!
Condensate Systems
Tanair BOW-S1800S | 1800 CFM Oil Water Separator

Tanair BOW-S1800S oil-water separator for compressed-air systems up to 1800 CFM. Designed to treat oil-contaminated condensate from compatible oil-injected compressors using the correct condensate-management setup.

Original price was: £1,968.00.Current price is: £1,603.92. exc vat. Add to basket
Available to Order
Original price was: £1,968.00.Current price is: £1,603.92. exc vat.
Sale!
Condensate Systems
Tanair BOW-S2500S | 2500 CFM Oil Water Separator

Tanair BOW-S2500S oil-water separator for compressed-air systems up to 2500 CFM. Designed to treat oil-contaminated condensate from compatible oil-injected compressors using the correct condensate-management setup.

Original price was: £3,345.00.Current price is: £2,726.17. exc vat. Add to basket
Available to Order
Original price was: £3,345.00.Current price is: £2,726.17. exc vat.

Newer Tanair Range

TAN Oil Water Separator Range

TANCS75 · Up to 75 CFM

Compact separator for small workshops, garages and lower-output oil-injected compressor systems.

TAN120ST · Up to 100 CFM

For busy workshops, service centres and compact screw-compressor installations.

TAN300 · Up to 300 CFM

For engineering businesses, manufacturing cells and medium compressed-air systems.

TAN750 · Up to 750 CFM

For larger workshops, production facilities and central compressor rooms.

TAN2TANDEMOWS · Up to 1500 CFM

For high-demand manufacturing sites and larger multi-compressor installations.

Carbon-Free Treatment Media

The current TAN product information describes advanced carbon-free treatment media, with selected models offering service life up to approximately 4,000 operating hours depending on application.

BOW Range

BOW Oil Water Separator Range

60–360 CFM

BOW-S60S, BOW-S120S and BOW-S360S cover smaller workshop and medium-duty industrial systems.

900–1250 CFM

BOW-S900S and BOW-S1250S cover larger production environments and central compressor installations.

1800–2500 CFM

BOW-S1800S and BOW-S2500S cover substantial industrial sites and very high-capacity compressed-air systems.

Silexa Media

Current technical information for the BOW range lists Silexa treatment media on selected models.

Sizing Guide

How to Size an Oil Water Separator

Total Compressor Airflow

Add together the airflow of every compressor whose condensate will discharge into the separator.

Lubricant Type

Confirm the compressor oil. Mineral, synthetic and polyglycol lubricants can require different treatment media or methods.

Operating Hours

Longer annual running hours can increase the amount of oily condensate that the treatment system must handle.

Site Conditions

Ambient conditions and condensate volume should be considered alongside nominal compressor capacity.

How It Works

How an Oil Water Separator Treats Compressor Condensate

Condensate from compressor drains enters the separator and passes through specialist treatment media. The media captures and retains lubricant while treated water moves through the system towards the outlet.

Separates compressor lubricant from collected condensate
Reduces the volume of oily waste requiring specialist handling
Supports organised condensate management within the compressor room
Provides replaceable service media for planned maintenance

Discharge & Compliance

Check Your Local Trade-Effluent Requirements

Treated condensate must still be managed in accordance with the requirements applying to the site and discharge route. Consent and discharge limits can vary.

Never discharge untreated oily compressor condensate into surface water, groundwater, storm drains or another location that is not authorised for that waste stream.

Installation

Installation & Maintenance Guidance

Connect all relevant compressor, receiver, dryer and filter drains where appropriate
Install the separator upright on a stable and accessible surface
Confirm inlet and outlet connections before commissioning
Use treatment media compatible with the compressor lubricant
Inspect treated-water quality using the applicable test method
Replace service media at the recommended interval or when outlet quality deteriorates

Support

Need Help Sizing a Condensate System?

Compressed Air Systems UK can help with oil-water separator selection, compressor drains, dryer drains, filtration condensate, replacement media and complete condensate-management systems.

Call 0121 753 3330 with the compressor models, total connected CFM, lubricant type and operating hours and we can help identify the appropriate separator.

FAQs

Oil Water Separator FAQs

Why does compressor condensate need treatment?

Condensate from an oil-injected compressor can contain lubricant and other contamination, so it should not simply be discharged untreated.

How do I size an oil water separator?

Use the combined airflow of all connected compressors and consider lubricant type, operating hours, ambient conditions and expected condensate volume.

Can one separator serve several compressors?

Yes, provided the separator is correctly sized for the combined airflow and condensate load from the whole installation.

Does compressor oil type matter?

Yes. Different lubricants can interact differently with separation media, and some oils may require specialist treatment.

How often should the media be replaced?

Follow the model-specific service interval and monitor treated-water quality. Selected Tanair TAN systems list service life up to approximately 4,000 operating hours depending on application.

Can treated condensate always be discharged to the sewer?

No. Confirm the applicable trade-effluent consent and local discharge requirements for the site before disposal.

Can Compressed Air Systems UK help with replacement separator media?

Yes. We can help identify replacement media and service components when you provide the separator model and installed system details.

Need Help Choosing an Oil Water Separator?

Send us the compressor models, combined airflow, lubricant type and operating hours and our team can help size the correct condensate treatment system.

Shop Separators Call 0121 753 3330

Industries We Support

Energy, Process & Heavy Industry

Food & Beverage

Automotive & Transport

Manufacturing & Engineering

And many more — talk to us for help sizing the right solution for your application.

Support & Aftercare

WarrantyFull peace of mind guaranteed on all workshop compressors.

UK installation availableProfessional on-site setup by our experienced technicians.

Full Aftermarket SupportComprehensive spares and repairs always ready to go.

UK Based SupportLocal experts just a phone call away for any assistance.

Genuine Service PartsOnly original, high-quality service parts for your machine.

Expert Air AdviceLeverage our 30+ years of technical compressed air knowledge.