RECD supplier for DG setsChoosing an requires more than checking a product photograph, comparing prices or accepting a seller's “CPCB approved” claim. The difference between a properly documented RECD and a product with unclear certification or applicability can be significant for businesses operating diesel generator sets.

May 9, 2025CPCB has published a list of manufacturers certified for Retrofit Emission Control Devices (RECDs) applicable to diesel genset engines up to 800 kW. The list available on its website is dated and specifies manufacturer-wise engine-power ranges, Phase I/Phase II applicability and certification agencies. For purchases in 2026, buyers should use official CPCB information as a reference and verify the latest applicable documentation before ordering.

Genuine and Non-Compliant: Why the Difference Matters

genuineThe word should not simply mean that a product has a brand name or professional-looking packaging.

For an RECD, buyers should be able to establish a connection between:

Manufacturer → Exact RECD model → Intended engine/application → Supporting documentation

If that connection cannot be demonstrated, the buyer should ask additional questions before proceeding.

A product being advertised online as an “RECD for DG sets” does not, by itself, establish that it is suitable for a particular engine or supported by the relevant CPCB documentation.

What Should a Buyer Verify First?

Before comparing suppliers, collect the basic information about your DG set:

Engine manufacturer
Engine model
Engine serial number
Gross mechanical power in kW
DG rating in kVA
Existing exhaust arrangement
Installation location
Photographs of the engine nameplate
Photographs of the exhaust system

This information allows the supplier to identify the proposed product more accurately.

800 kW gross mechanical powerCPCB's RECD procedure specifically addresses diesel power-generating-set engines up to , and its certification/test documentation identifies the engine application for which an RECD is qualified.

What Makes an RECD Product Easier to Verify?

A properly documented product should have identifiable technical information.

Look for:

Manufacturer Identity

The actual manufacturer should be clearly identified.

Product Model

The quotation should specify the exact RECD model or type.

Application Range

The documentation should indicate the engine/application range for which the device is qualified.

Certification Information

Relevant certification or test documentation should be available for review.

Technical Datasheet

The supplier should be able to explain the device's specifications and installation requirements.

CPCB's published certificate/test-report format includes fields for the manufacturer, RECD family, RECD type/model, identifying part numbers, type identification and the engine for which the RECD was tested.

These details provide a useful framework for buyers evaluating supplier documentation.

Red Flag #1: “CPCB Approved” Without a Model Number

One of the simplest warning signs is a quotation that says only:

“CPCB-approved RECD.”

Ask:

Which manufacturer?

Which model?

Which engine range?

Which Phase?

Which certification agency?

What document supports the claim?

A generic statement is not enough for technical procurement.

CPCB's published manufacturer list itself is organized according to specific manufacturer applications and engine-power ranges rather than treating all RECD products as interchangeable.

Red Flag #2: A Supplier Claims One Product Fits Every DG

A statement such as:

“Our RECD is suitable for all DG sets.”

should be examined carefully.

DG engines differ in:

Manufacturer
Engine design
Power
Rated speed
Exhaust configuration
Emission characteristics
Application

CPCB's certification/test-report format specifically records the base engine information and identifies the engine types for which the REC device is qualified.

Therefore, ask the supplier to demonstrate the applicability of the proposed model to your particular DG.

Red Flag #3: The Price Is Far Below Other Quotations

Price alone does not determine whether a product is genuine or non-compliant.

However, an unusually low quotation deserves investigation.

A low price might result from:

Equipment-only supply
Installation excluded
Fabrication excluded
Transportation excluded
Commissioning excluded
Different technical scope
Limited warranty
Missing accessories

Before concluding that a cheaper product is better, request an itemized quotation.

Red Flag #4: No Supporting Documentation

A supplier should be able to explain what documentation applies to the product being sold.

Ask for relevant:

Technical datasheet
Certification/test documentation
Product identification
Application range
Manufacturer details
Installation instructions
Warranty information

CPCB's RECD procedure provides the framework for emission-compliance testing, while its test-report format records performance information such as PM, CO, HC, NOx, smoke, exhaust back pressure and other parameters.

That does not mean every supplier must provide every underlying test document automatically, but buyers should ask for the relevant documentation supporting the product-specific claim.

Red Flag #5: Documentation and Quotation Don't Match

Suppose the supplier quotes:

RECD Model X

but the supplied datasheet says:

RECD Model Y

and the certification document refers to:

RECD Family Z

Do not ignore the difference.

Ask the supplier to explain:

Whether these are different names for the same product
Whether one is a family designation
Which exact model is being supplied
Which document applies to that model

The product identity should be clear before the purchase order is issued.

Genuine Product Does Not Mean “Suitable for Every Application”

This distinction is important.

A manufacturer may legitimately have a certified RECD product, but that does not automatically mean the same product is applicable to every engine.

CPCB's manufacturer list provides different applicability ranges for listed manufacturers. For example, the published entries for Automoto Genset Solutions LLP and Chakr Innovation Pvt. Ltd. contain multiple engine-power ranges and Phase classifications.

Therefore:

Genuine product ≠ universal product

The application still needs to be verified.

How to Check the Manufacturer

Start with the official CPCB information available for RECD manufacturers.

The CPCB list dated May 9, 2025 identifies manufacturers and provides their documented applicability and certification agency information.

When evaluating a supplier, compare:

Supplier's manufacturer name

with

Officially published manufacturer information

Then check whether the product being quoted corresponds to the relevant application.

Do not rely on a company using the phrase “CPCB approved” in its website title or advertisement alone.

Certification Agency Information Matters

CPCB's published manufacturer list identifies certification agencies for the listed applications.

ICATARAIFor example, the current published list contains applications associated with , while one listed Chakr application is associated with .

This information should be used for verification rather than as a simple ranking system.

Ask:

“Which certification agency's documentation applies to this exact RECD model?”

Then compare the answer with the documentation provided.

Look Beyond the Certificate

Even when documentation is available, installation still matters.

The supplier should understand:

Exhaust diameter
Flange arrangement
Existing silencer
Exhaust routing
Available space
Mounting requirements
Maintenance access
Back-pressure considerations

exhaust back pressure requirementCPCB's test-report format includes an , demonstrating that exhaust-system characteristics are relevant within RECD testing.

Therefore, selecting a documented product is only one part of the procurement process.

Don't Confuse a Product Brochure With Certification

A brochure may contain statements such as:

CPCB compliant
High-efficiency RECD
Advanced emission-control technology
Suitable for diesel generators
Low-maintenance system

A brochure is useful for understanding the product, but buyers should not automatically treat promotional statements as certification evidence.

Ask for the relevant supporting documents.

The CPCB test-report format contains considerably more detailed information than a typical sales brochure, including base-engine information, RECD model details, testing references and performance results.

Check Performance Claims Carefully

Some suppliers may advertise a specific PM reduction percentage.

Do not simply compare percentages printed in brochures.

Ask:

Which exact model achieved this result?

On which engine?

Under what test procedure?

Is the result documented?

CPCB's test-report format records baseline emissions, RECD-fitted emissions and final PM results after the applicable adjustment factor, along with other performance parameters.

This shows why a performance claim should be connected to its testing context.

Installation Is Another Genuine-vs-Unclear Test

A technically responsible supplier should be able to explain how the product will be installed.

Ask:

Will you inspect the site?
What exhaust modifications are required?
Are supports included?
Is fabrication included?
Who performs installation?
Who performs commissioning?
Will installation documentation be supplied?

If the supplier sells the equipment but cannot explain how it integrates with your DG installation, request additional technical information.

Warranty Can Reveal the Supplier's Commitment

Before purchasing, request written warranty terms.

Check:

Duration

How long is the warranty?

Coverage

Which components are included?

Labour

Is installation-related labour covered?

Replacement

What happens if a covered component fails?

Site Support

Are site visits included?

Exclusions

What situations are excluded?

A genuine product should still be purchased with clearly understood commercial and service responsibilities.

What About Online RECD Purchases?

buy RECD for generators onlineSearches such as can help buyers discover products and suppliers quickly.

However, online availability should not replace technical verification.

Before paying for an online listing, confirm:

Manufacturer
Exact model
Application range
Supporting documentation
Warranty
Installation
Delivery
After-sales service

A product page can help you find a supplier; it should not be the only basis for determining technical suitability.

A Simple Genuine-Product Verification Process

Use this five-step approach.

Step 1: Identify the DG

Record the engine manufacturer, model and gross mechanical power.

Step 2: Identify the RECD

Obtain the exact manufacturer and model being offered.

Step 3: Check Application

Confirm the documented engine/application range.

Step 4: Review Documentation

Check relevant certification/test information and product details.

Step 5: Review Installation

Confirm that the supplier can properly integrate the device with the existing exhaust system.

Only after these checks should commercial comparison become the final deciding factor.

Questions to Ask a Supplier

Before issuing a purchase order, ask:

Who is the actual RECD manufacturer?
What is the exact model number?
What engine/application range is documented?
Which Phase does it apply to, where relevant?
Which certification agency is associated with the product?
Can you provide relevant certification/test documentation?
What PM performance information is documented?
What installation work is required?
Is site inspection available?
Is commissioning included?
What is covered by the warranty?
What after-sales support is available?
Are spare parts available?
What is the complete delivery cost?
What is the expected delivery and installation schedule?

A supplier that provides clear answers makes technical evaluation much easier.

A Buyer’s Genuine Product Checklist

Manufacturer

Manufacturer identified
Manufacturer checked against official information
Supplier/manufacturer relationship understood

Product

Exact RECD model identified
Product family identified if applicable
Application range confirmed
Technical datasheet received

Documentation

Relevant certification/test information reviewed
Certification agency identified
Product details match quotation
Performance claims supported

Installation

Exhaust arrangement reviewed
Installation scope defined
Fabrication requirements identified
Commissioning responsibility established

Commercial

Equipment price confirmed
Installation price confirmed
Transportation confirmed
Warranty confirmed
Total cost calculated

Support

Service contact identified
Spare-parts availability checked
Warranty procedure understood

Verify the Latest Official Information Before Purchase

Generator SetsCPCB's website maintains a section containing Type Approval/COP information and related material.

The RECD manufacturer list currently available from CPCB is dated May 9, 2025. Since requirements and published information can change, a buyer making a 2026 procurement decision should check the latest CPCB material before finalizing an order.

CPCB's published RECD procedure was revised on July 24, 2023 and provides the system and procedure for emission-compliance testing of RECDs for diesel power-generating-set engines up to 800 kW gross mechanical power.

Where applicable, also verify requirements or directions issued by the relevant State Pollution Control Board, Pollution Control Committee or other competent authority.

Final Thoughts

genuine RECD product and a questionable or non-compliant offeringbuy RECD for generators onlineThe difference between a is not always visible from a photograph or price quotation. A supplier that can clearly explain each of these areas deserves greater consideration than one relying mainly on generic “CPCB approved” advertising. Online searches to can be useful for discovering potential suppliers, but technical and regulatory verification should happen before payment or installation. For organizations purchasing RECD systems for one or multiple DG sets, a documented procurement process can reduce the risk of buying an unsuitable product, misunderstanding the scope of supply or relying on an unsupported compliance claim.

RECD Supplier for DG Sets: Genuine vs Non-Compliant Products Explained

Protect Your Investment - Learn What Sets Genuine RECD Devices Apart from Non-Compliant Copies