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FAQs: CleanAIR ASSURE™ DOC

Meets proposed EPA - RICE NESHAP regulations!

1. What does DOC stand for?
2. What are other terms used for a DOC?
3. What is a CleanAIR ASSURE™ DOC?
4. What does the CleanAIR ASSURE™ DOC do?
5. What is the emissions reduction of an ASSURE™ DOC?
6. What is the ASSURE™ DOC made of?
7. Can a DOC be used on a stationary engine as well as a mobile application?
8. What are common mobile applications for the ASSURE™ DOC?
9. Why would I need a DOC?
10. What exhaust temperature is required for an ASSURE™ DOC to work on an engine?
11. Does the CleanAIR ASSURE™ DOC adhere to engine backpressure limits?
12. Does a DOC require regeneration?
13. Can an ASSURE™ DOC be incorporated into a muffler or silencer design?
14. Does a silencer unit containing ASSURE™ DOCs meet sound attenuation requirements?
15. Can the CleanAIR ASSURE™ DOC fit within the available space requirements of an application?
16. Is there an additional charge for engineering services to custom-design a DOC to fit an application?
17. Are there any electrical components involved with the ASSURE™ DOC?
18. Will there be installation and/or labor costs involved with installing an ASSURE™ DOC?
19. Can a DOC become plugged up?
20. Is there a warranty?
21. Are there any health risks associated with the catalyst?
22. How can I get a quote for an ASSURE DOC?

1. What does DOC stand for?

Diesel Oxidation Converter.

2. What are other terms used for a DOC?

Scrubber, purifier, oxi-cat, oxidation catalyst.

3. What is a CleanAIR ASSURE™ DOC?

The brand name for a diesel oxidation converter manufactured by CleanAIR Systems. The ASSURE™ DOC uses a flow-through catalyst to reduce emissions from diesel exhaust.

4. What does the CleanAIR ASSURE™ DOC do?

Reduces carbon monoxide (CO), hydrocarbons (HC) and some particulate matter (PM) from diesel exhaust by transforming pollutants into harmless gases through the process of oxidation. This gets rid of odor and dangerous toxic emissions (CO).

5. What is the emissions reduction of an ASSURE™ DOC?

Hydrocarbons - Greater than 90%

Carbon Monoxide – Greater than 90%

Particulate Matter – 20% to 50%

6. What is the ASSURE™ DOC made of?

- Ceramic flow-through substrate

- Precious-metal based catalyst

- Corrosion-resistant 304L stainless steel

7. Can a DOC be used on a stationary engine as well as a mobile application?

Yes. An ASSURE™ DOC can be used on a stationary engine, on- and off-road vehicles to reduce HC, CO and PM. Each DOC is sized specifically for individual applications according to engine specifications.

8. What are common mobile applications for the ASSURE™ DOC?

Almost any on-road or off-road vehicle can be retrofitted with a DOC. Vehicles that commonly use a DOC are skid steers, forklifts and excavators, as well as buses and trucks.

9. Why would I need a DOC?

To reduce HC (odor) and toxic emissions.

10. What exhaust temperature is required for an ASSURE™ DOC to work on an engine?

A minimum exhaust temperature of 180 degrees C (356 degrees F) is required for the catalyst to begin oxidation.

11. Does the CleanAIR ASSURE™ DOC adhere to engine backpressure limits?

CleanAIR technical sales engineers make sure that every product is correctly sized to avoid backpressure problems. A correctly sized DOC will guarantee against a drop in emissions control efficiency, damage to the converter or damage to the engine. Sizing is determined by engine specifications provided by the customer.

12. Does a DOC require regeneration?

No, unlike a diesel particulate filter a DOC requires no regeneration, therefore making it ideal for most diesel engines.

13. Can an ASSURE™ DOC be incorporated into a muffler or silencer design?

Yes, an ASSURE™ DOC can be designed to replace an existing muffler or silencer. A muffler or silencer design will save space and offer sound attenuation.

14. Does a silencer unit containing ASSURE™ DOCs meet sound attenuation requirements?

Yes, systems are available in three levels of sound attenuation:

- Industrial Grade: 22 – 29 dBA

- Critical Grade: 27 – 35 dBA

- Super Critical Grade: 30 – 38 dBA

Critical and Super Critical Grade DOC silencer systems have double-walled construction and are fully insulated to meet strict sound attenuation requirements.

15. Can the CleanAIR ASSURE™ DOC fit within the available space requirements of an application?

In most cases yes. When space is a problem, the solution is a customized design to meet limitations. Using custom engineering and design, every CleanAIR DOC is fabricated to meet the customer’s application-specific requirements.

16. Is there an additional charge for engineering services to custom-design a DOC to fit an application?

No. All engineering costs are part of the quoted price. There are no “hidden” fees.

17. Are there any electrical components involved with the ASSURE™ DOC?

No, unlike other more complex emissions control technologies, DOCs do not require electronic controls.

18. Will there be installation and/or labor costs involved with installing an ASSURE™ DOC?

Emissions control products can be complicated depending on the application and technology required. CleanAIR custom designs each product package to user specifications such as the location of the inlet and outlet, offering easier installation. The easier the system is to install, the less cost will be required for installation. Usually DOCs are as easy to install as a regular muffler.

19. Can a DOC become plugged up?

This is a rare occurrence, but it can happen with a very “dirty” engine or an engine with low exhaust temperatures. Many older 2-stroke engines produce a lot of particulate matter and may also have low exhaust temperatures that don’t allow the catalyst of the DOC to begin oxidation. Either of these two factors may cause a DOC to become plugged up with particulate.

20. Is there a warranty?

Yes, all CleanAIR Systems include a product warranty.

21. Are there any health risks associated with the catalyst?

No. Some manufacturers incorporate vanadium pentoxide within their catalysts. Vanadium pentoxide has been associated with certain health risks. CleanAIR uses no toxic substances in the manufacturing of their catalysts.

22. How can I get a quote for an ASSURE DOC?

- Call CleanAIR Systems at 800-355-5513 or 505-474-4120

- Or send an email request along with your engine specs to information@cleanairsys.com

- Or complete the Request for Pricing form found on this website

 

 

Contact Us
800-355-5513
505-474-4120

 

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