RECD supplier for DG setsSelecting an should be treated as a technical procurement decision rather than a simple product purchase. Before approving a quotation, a generator owner should know exactly which RECD model is being offered, whether its documented application matches the DG set, what installation work is required, and what support will be available afterward.

CPCB has a published system and procedure for emission-compliance testing of retrofit emission-control devices for diesel power-generating-set engines up to 800 kW gross mechanical power. The procedure was revised on July 24, 2023.

Don't Start With the Price

One of the most common procurement mistakes is asking:

“What is your RECD price?”

before providing any information about the generator.

A supplier needs sufficient technical information to determine what product is appropriate.

Start with:

Engine manufacturer
Engine model
Engine serial number
Gross mechanical power
DG-set rating
Existing exhaust arrangement
Installation location
Nameplate photographs

A quotation based on incomplete information may need to be revised later.

1. Verify Your DG Set Details

Before contacting suppliers, create a basic DG information sheet.

Record the following:

Engine manufacturer: __________

Engine model: __________

Engine serial number: __________

Gross mechanical power: __________ kW

DG rating: __________ kVA

Exhaust diameter: __________

Installation location: __________

Number of DG sets: __________

This information gives the supplier a much clearer picture of the application.

Why Power Information Matters

800 kW gross mechanical powerCPCB's RECD procedure specifically covers diesel power-generating-set engines up to .

Therefore, buyers should establish the engine's relevant power information rather than selecting an RECD simply according to a generic kVA category.

2. Ask for the Exact RECD Model

Never place an order based only on:

“CPCB RECD for DG set.”

Ask the supplier to identify the exact:

Manufacturer
Product name
Model number
RECD family, if applicable
Applicable engine/engine family
Power range
Phase, where relevant

CPCB's certificate template specifically includes fields for the manufacturer's trade name, RECD family designation, RECD type/model designation and the engine/engine family for which the RECD is intended.

That makes model-level identification particularly important during procurement.

A Simple Rule

If the supplier cannot tell you exactly what model you are buying, don't finalize the order yet.

3. Check Product Applicability

The next question should be:

“Is this exact RECD model documented for my engine/application?”

Do not accept a generic statement such as:

“It works with all DG sets.”

Ask for application-specific information.

application rangeCPCB's certificate template includes an field for the engine/engine family for which an RECD is intended.

This means the buyer should connect the proposed product with the actual engine rather than assuming universal compatibility.

4. Review the Certification or Test Documentation

Documentation is one of the most important parts of an RECD purchase.

CPCB's published procedure establishes the framework for type approval and conformity-of-production-related compliance testing, while its certificate template contains product-specific fields such as RECD type/model, application range and PM reduction efficiency.

Ask the supplier to provide relevant documents for the exact product being proposed.

Look for:

Manufacturer name
RECD model
RECD family, if applicable
Application range
Certification/test information
Certification agency
Certificate number
Validity information, where applicable

Don't Confuse a Brochure With Certification

A product brochure explains the product.

A certification or test document serves a different purpose.

Keep the two separate during procurement.

5. Be Careful With “CPCB Approved” Claims

The phrase “CPCB approved” can appear frequently in product advertising.

However, buyers should ask:

Approved/certified for what exact model?

For which engine range?

Under which procedure?

What document supports the statement?

Is the document current and applicable to the proposed product?

This is especially important because CPCB's certificate format is product-specific and identifies the RECD model and intended engine application.

A broad marketing statement should therefore not replace document verification.

6. Examine the Technical Datasheet

Request a technical datasheet before issuing the purchase order.

The document should help you understand:

Product dimensions
Weight
Model identification
Applicable application
Connections
Installation requirements
Operating considerations
Maintenance requirements
Monitoring/control components, where applicable

Compare the datasheet with the quotation.

Check for Consistency

Quotation Model = Datasheet Model = Supporting Documentation

If these do not match, ask the supplier to explain the difference.

7. Inspect the Existing Exhaust Arrangement

An RECD installation needs to be considered alongside the existing DG exhaust system.

Ask the supplier to review:

Exhaust-pipe diameter
Flange dimensions
Silencer location
Pipe bends
Available installation space
Support structure
Access for maintenance
Exhaust routing

CPCB's RECD procedure includes exhaust back pressure among the parameters addressed within its testing framework.

Therefore, installation should be evaluated as part of the technical proposal.

Site Survey Can Be Valuable

If the installation is complicated, ask whether the supplier provides a site survey.

A site inspection can identify:

Space limitations
Fabrication requirements
Mounting requirements
Exhaust modifications
Maintenance-access issues

Resolving these questions before delivery can make installation more predictable.

8. Understand the Complete Installation Scope

Two suppliers may offer the same-looking equipment but completely different installation packages.

Ask whether the quotation includes:

Site inspection
Equipment installation
Exhaust fabrication
Mounting/supports
Accessories
Electrical/control work, where applicable
Commissioning
Documentation

Do not assume that “installation support” means complete installation.

Ask for a written scope.

9. Ask Who Will Perform Commissioning

Commissioning should have a clearly identified responsibility.

Find out:

Who performs commissioning?

Is it included in the price?

What activities are included?

Will a commissioning report be provided?

Who is responsible if installation-related problems occur?

These details should be settled before the purchase order.

10. Check Warranty Terms Carefully

Warranty is another area where buyers should look beyond a single number.

Instead of simply asking:

“How many years of warranty?”

ask:

What components are covered?
When does the warranty begin?
Is labour covered?
Are site visits included?
Are replacement parts covered?
What exclusions apply?
How are claims submitted?

A longer warranty with extensive exclusions may not provide the same value as a shorter but clearly defined warranty.

11. Evaluate After-Sales Support

Ask the supplier what happens after installation.

A useful supplier should be able to explain its process for:

Technical complaints
Troubleshooting
Site visits
Warranty claims
Preventive maintenance
Spare-parts requirements

If your organization operates multiple DG sets, service availability becomes even more important.

Ask This Question

“Who will support this RECD after commissioning?”

If the answer is unclear, investigate further.

12. Check Spare-Parts Availability

Before buying, ask:

Which components may require replacement?
Are spare parts available domestically?
Who supplies them?
What is the expected supply time?
Are maintenance kits available?
Can the supplier provide technical assistance during replacement?

This information can help you estimate the long-term ownership requirements.

13. Compare Delivery Promises Properly

A supplier may advertise:

“Delivery within 15 days.”

Ask whether that means:

Manufacturing completion
Dispatch
Arrival at your site
Installation
Commissioning

These are different milestones.

14. Don't Choose the Cheapest Supplier Automatically

Suppose:

Supplier A: ₹90,000

Supplier B: ₹1,00,000

Supplier C: ₹1,10,000

The first quotation looks attractive.

But if Supplier A excludes:

Installation
Fabrication
Transportation
Commissioning

while Supplier C includes everything, the price comparison changes significantly.

complete project costsAlways compare .

15. Research Suppliers Online, But Verify Before Ordering

Online research can help you create a shortlist.

buy RECD for generators onlineSearches such as can help identify manufacturers, suppliers and product listings.

But an online listing should not be treated as proof that the product is appropriate for your DG.

Before ordering online, verify:

Seller identity
Original manufacturer
Exact product model
Technical applicability
Supporting documentation
Warranty
Installation
Delivery
After-sales service

For a technical product, online convenience should come after technical verification—not before it.

16. Ask About Manufacturer vs Supplier Responsibility

The seller on your quotation may not be the actual manufacturer.

Ask:

“Are you the manufacturer or an authorized supplier?”

Then establish who is responsible for:

Product quality
Certification documentation
Warranty
Installation
Commissioning
Spare parts
Technical support

Put these responsibilities in the purchase documentation.

17. Check Whether the Supplier Understands Your Application

A technically serious supplier should ask questions about the DG.

Expect questions about:

Engine model
Power
Exhaust configuration
Installation location
Available space
Operating requirements
Number of DG sets
Installation schedule

If a supplier recommends a product without requesting basic generator information, ask how the recommendation was made.

18. Look for Product-Specific Identification

CPCB's certificate template includes several product-identification fields, including:

Manufacturer's trade name or mark
RECD family designation
RECD type/model designation
Type identification
Identifying part numbers
Engine/engine-family application range

know exactly what product you are purchasingThis provides a useful model for buyers: .

Don't accept a quotation where the product is described only as “RECD system.”

19. Check PM Reduction Information Carefully

PM Reduction Efficiency of the RECDCPCB's certificate template includes a field for .

If a supplier provides a specific reduction percentage, ask:

Which product model does the figure refer to?
Under what testing conditions was it determined?
Is the figure documented?
Does the documentation correspond to the exact product being quoted?

Avoid assuming that a percentage advertised on a generic brochure automatically applies to every installation.

20. Verify Current Official Information

CPCB's website maintains generator-set information and official technical resources. Its current website also provides access to generator-set Type Approval/COP information.

For a 2026 procurement, verify the latest available information before making a final decision.

This is particularly important because:

Procedures may be updated
Manufacturer information may change
Certification documents may have validity periods
Local requirements may apply
Project-specific directions may exist

Do not rely solely on an old blog post or supplier advertisement.

21. Check Local Requirements

National-level information may not be the only consideration.

Depending on where the DG is installed, buyers may also need to consider requirements or directions from:

State Pollution Control Board
Pollution Control Committee
Local competent authorities
Other applicable regulatory bodies

For projects in environmentally sensitive or specially regulated areas, verify the current requirements applicable to the site.

22. Red Flags Before Purchase

Consider asking additional questions if the supplier:

Gives a price without asking DG details

The recommendation may not be application-specific.

Cannot provide the exact model

You should know what you are purchasing.

Uses only generic compliance language

Ask for supporting documentation.

Cannot explain installation

This may create additional site costs.

Has unclear warranty terms

Get the coverage in writing.

Cannot explain service support

Find out who handles post-installation issues.

Offers an unusually low price

Ask what is excluded from the quotation.

The 10 Questions You Should Ask Before Ordering

Before approving an RECD purchase, ask the supplier:

What exact RECD model are you supplying?
Which engine/engine family is it intended for?
What gross mechanical power range applies?
What supporting certification/test documentation is available?
What Phase applicability is relevant, where applicable?
What installation work is included?
Is commissioning included?
What exactly does the warranty cover?
How is after-sales service handled?
What is the final delivered and installed cost?

Written answers are preferable for important procurement decisions.

Final Pre-Purchase Checklist

Technical

Engine model confirmed
Gross mechanical power confirmed
Exact RECD model identified
Application range checked
Datasheet reviewed
Supporting documentation reviewed

Installation

Exhaust arrangement inspected
Site survey completed if necessary
Fabrication scope defined
Installation responsibility defined
Commissioning responsibility defined

Commercial

Equipment price confirmed
Installation cost confirmed
Fabrication cost confirmed
Transportation confirmed
Commissioning confirmed
Total cost calculated

Support

Warranty terms received
Warranty start date confirmed
Spare-parts availability checked
Service contact identified
Post-installation support understood

Compliance

Current CPCB information checked
Product-specific documentation verified
Applicable local requirements checked
Any site-specific directions reviewed

Final Thoughts

RECD supplier for DG setsbuy RECD for generators onlineBefore choosing an , establish exactly which generator you have, what RECD model is being proposed and what documentation supports its intended application. Then evaluate installation, commissioning, delivery, warranty, service and the complete project cost. A low quotation is not necessarily a better quotation. Likewise, an impressive marketing claim is not a substitute for product-specific documentation. Online searches such as can make supplier discovery easier, but buyers should still verify the seller, manufacturer, exact model, technical applicability, documentation, warranty and installation arrangements before making payment. For a 2026 purchase, always verify the latest official CPCB information and any applicable state or local requirements before installation. The final suitability of an RECD should be established for the particular DG set and current regulatory situation rather than assumed from a generic advertisement.

RECD Supplier for DG Sets: What to Check Before You Buy

From Certification to After-Sales Support — Everything to Confirm Before You Buy