Emissions control systems for today’s air quality standards

FAQs – Permit DPF

1. What is the best way to control diesel exhaust emissions from stationary engines?
2. What is regeneration and why is it important?
3. Is CleanAIR’s PERMIT™ DPF/Silencer system verified by CARB or EPA?
4. Is CleanAIR’s PERMIT™ DPF/Silencer system all-inclusive?
5. Will the PERMIT™ DPF/Silencer require installation and/or labor costs?
6. Does the PERMIT DPF/Silencer system adhere to engine backpressure limits set by the manufacturer’s specifications?
7. What material is used in the construction of the PERMIT™ DPF/Silencer System?
8. Does the PERMIT™ DPF/Silencer emissions control system also meet sound attenuation requirements?
9. Can CleanAIR’s DPF/Silencer systems fit within the available space of my application?
10. Is there a system warranty on performance and workmanship?
11. Will my system be completed and delivered within the specified time requirement?
12. How do I know when backpressure is a problem?
13. What happens if my filters become plugged?
14. Where do I find PERMIT™ DPF/Silencer information, such as product specifications and pricing, for my engine model?

1. What is the best way to control diesel exhaust emissions from stationary engines?

A diesel particulate filter such as the CleanAIR PERMIT™ DPF will substantially decrease soot or visible black smoke from your exhaust. Depending on the application and the type of fuel you are using, the CleanAIR PERMIT™ DPF can reduce particulate matter by over 85%, and hydrocarbons and carbon monoxide by up to 95%. When packaged as a silencer design, the unit will also offer sound attenuation.

2. What is regeneration and why is it important?

Diesel particulate filters are efficient at collecting PM from diesel exhaust, resulting in a considerable amount of build-up within a few hours of operation. To clean the filter or reduce build-up, it is necessary to oxidize the solid carbon-based PM into gaseous carbon dioxide. This process is called regeneration. It is primarily dependent upon the type of catalyst applied to the diesel particulate filter, exhaust gas temperature and fuel sulfur content. The PERMIT™ DPF will regenerate using any diesel fuel, but regenerates at the lowest exhaust temperature (300C) using ultra-low sulfur diesel.

3. Is CleanAIR’s PERMIT™ DPF/Silencer system verified by CARB or EPA?

The PERMIT™ DPF/Silencer system is CARB verified, Level 3 for prime power and emergency generators. It has passed rigorous testing requirements to meet strict California air quality regulations. If a technology is CARB verified it is also considered EPA verified through a reciprocal agreement between EPA and CARB.

4. Is CleanAIR’s PERMIT™ DPF/Silencer system all-inclusive?

CleanAIR’s emissions control system for stationary engines is a complete system, ready for installation. System components include: PERMIT™ DPFs, stainless-steel silencer packaging, and CleanAIR’s HiBACK™ USB backpressure monitor.

5. Will the PERMIT™ DPF/Silencer require installation and/or labor costs?

Emissions control systems can be complicated depending on the application and control technology required. CleanAIR custom designs product packaging to user specifications such as space and inlet/outlet locations, offering easier installation. The easier the system is to install, the less it will cost the buyer in labor charges.

6. Does the PERMIT DPF/Silencer system adhere to engine backpressure limits set by the manufacturer’s specifications?

The CleanAIR technical sales staff will make sure your product is properly sized to avoid backpressure issues. A system requires the correct number of filters as well as the right size filter in order to function within the specified engine backpressure. A correctly sized DPF/Silencer will guarantee against a drop in emissions control efficiency or damage to the system.

7. What material is used in the construction of the PERMIT™ DPF/Silencer System?

CleanAIR uses corrosion resistant, long-lasting 304 stainless steel to package the outer silencer shell and inner filter housing. 304 stainless is considered one of the most durable steels to use for fabrication. All CleanAIR products are manufactured using 304 stainless steel.

8. Does the PERMIT™ DPF/Silencer emissions control system also meet sound attenuation requirements?

Yes, systems are available in three levels:
• Industrial Grade: 22 – 29 dBA
• Critical Grade: 27 – 35 dBA
• Super Critical Grade: 30 – 38 dBA

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

9. Can CleanAIR’s DPF/Silencer systems fit within the available space of my application?

Yes. When space is a problem, the solution requires a customized system to meet a buyer's base limitations. Using custom engineering and design, every CleanAIR system is fabricated to meet the customer’s application-specific requirements.

10. Is there a system warranty on performance and workmanship?

Yes. All verified and unverified CleanAIR systems include a product warranty.

11. Will my system be completed and delivered within the specified time requirement?

Because CleanAIR Systems is an integrated manufacturer, we have better control over lead times. Many times we can provide custom products in the same or less time than off-the-shelf products produced by other manufacturers.

12. How do I know when backpressure is a problem?

The HiBACK USB™ is a microprocessor-based data logger and alarm system designed by CleanAIR Systems to record and monitor backpressure and temperature. The proprietary design allows the user to be warned of a potential backpressure problem. The HiBACK USB™ can also track the duty cycle of the engine and allow analysis for operation time, exhaust temperature and backpressure profiles. Collected data can be downloaded to a computer for detailed analysis. See our product brochure for the HIBACK USB™.

13. What happens if my filters become plugged?

CleanAIR’s PERMIT™ DPF not only captures over 85% of diesel PM but also collects noncombustible ash produced due to the burning of engine oil. As with most filters, the ash must periodically be removed to maximize filter life. CleanAIR offers two solutions for filter cleaning:

• Inspect and Clean: CleanAIR offers an easy, inexpensive cleaning service for customers. The filter is return to CleanAIR for a thorough cleaning and follow-up inspection at our facility.

• The AeroCLEAN: A safe, fast and effective cleaning system developed by CleanAIR to dislodge collected material using compressed air. Does not require electricity.

Contact CleanAIR Systems directly for information on “Inspect and Clean” and the AeroCLEAN System.

14. Where do I find PERMIT™ DPF/Silencer information, such as product specifications and pricing, for my engine model?

For a price quote, complete the Request for Pricing form on this site.

Contact Us
800-355-5513
505-473-2500

 

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