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Certificates & Product Test Documents | YONGFAN
Documented Proof & Scope Verification

Certificates & Test Records: Verify Exact Scope Before Approval

Use YONGFAN certificate resources to verify the exact product, configuration, test scope and approval basis required by your project before procurement or technical submittal.

A certificate is not a general marketing badge. It answers one vital engineering question: what exactly has been verified? Match product families, fire smoke ratings (280 °C/30 min), explosion protection (Ex d IIC T6 Gb / CE21.1729), HEPA scan test records, hydrostatic pressure proofs, and fan aerodynamic curves to your project specification.

Ex Damper Cert CE21.1729 · Ex d IIC T6 Gb (IP65)
Fire Duty Proof DTF 280°C / 30 Min (GB 50016)
HEPA Scans 100% Individual MPPS Leak Scan
Hydrostatic 1.25× Design Pressure (GB 150/151)
Request a Product Certificate Certificate Audit Checklist
Quality assurance testing and certification documentation review for HVAC components
Verification Scope Integrity Project Requirement → Exact Product/Build → Applicable Standard → Certificate Scope Check
01 / Document Taxonomy

What Exactly Has Been Verified?

Do not treat a certificate, test report, standard reference, and factory inspection record as interchangeable. Each serves a distinct function in consultant technical submittals.
Engineers reviewing compliance certificates and test logs on industrial site
Evidence Hierarchy

Verify the Document’s Actual Scope

An actuator certificate does not certify the complete fan system; a fire-duty test does not prove explosion protection; a filter scan report does not qualify the cleanroom.

1. Product Certificate

Confirms a defined product, model family, or configuration complies with stated requirements. Identifies issuing body, cert number, marking, and limitations.

Example: CE21.1729 for BFHF Ex Damper

2. Test Report

Records measured results under stated conditions: fan airflow/pressure, sound power (ISO 3744), 280°C fire endurance, HEPA MPPS leak scans, and hydrostatic tests.

Example: Factory HEPA individual scan report

3. Standard Reference

Indicates a product is designed, classified, or tested with reference to a standard (e.g. ISO 16890, ISO 5801, GB 150). Does not equal a third-party certificate.

Example: Design according to GB 150 / ISO 5801

4. Factory Inspection Record

Routine production quality checks: fan dynamic balancing, motor running current, hydrostatic shell test, and final dimensional sign-off.

Example: Pre-delivery dynamic balance log
02 / Submittal Verification

What to Verify Before Accepting a Certificate

Before submitting a certificate to the consultant or building authority, audit these ten essential fields to prevent submittal rejection.
Audit Field Verification Check Why It Matters
1. Product Name
 Confirms document applies to correct equipment type Prevents applying an actuator or damper certificate to a complete fan box
2. Model / Series
 Matches proposed model number precisely Prevents transferring documentation across different product families
3. Certificate Number
 Verifies exact document reference (e.g. CE21.1729) Allows consultants to trace certificate validity in official registrar databases
4. Marking / Class
 Shows exact protection or performance level (e.g. Ex d IIC T6 Gb) Ensures gas group, temperature class, or fire duration matches specification
5. Referenced Standard
 Identifies governing technical basis (GB 3836, ISO 5801, EN 1822) Confirms testing methodology aligns with tender requirements
6. Holder / Manufacturer
 Confirms legal manufacturer and production facility Ensures manufacturer traceability on the submittal
7. Covered Options
 Checks whether motors, voltages, or actuators alter scope Changes in motor supplier or actuator model can void certification scope
8. Issue / Validity Status
 Confirms certificate is active, current, and unexpired Prevents rejection due to superseded standards or expired validity dates
9. Destination Market Acceptance
 Confirms scheme acceptance in project country A GB or CE document may not satisfy North American UL or local statutory codes
10. Ordered Configuration
 Confirms supplied hardware matches certified build Guarantees that what was quoted and tested is exactly what ships to site
03 / Equipment-Specific Evidence

Certificate & Test Proof Across Product Categories

Explore documented test scopes, certificate references, and engineering boundaries across explosion-proof dampers, fire fans, air filters, and hydronic equipment.
Evidence 01 · Hazardous Areas Certificate CE21.1729 · Ex d IIC T6 Gb

Explosion-Proof Dampers & Fans (BFHF, BFD, DTF, BT35-11)

YONGFAN’s documented explosion-proof damper program includes the BFHF Explosion-Proof Fire Damper and BFD Explosion-Proof Electric Control Damper. The supplied technical source identifies:

  • Certificate number: CE21.1729
  • Complete Ex marking: Ex d IIC T6 Gb with IP65 actuator protection
  • BFHF actuator: DL-φ5 (Normally Open, 70 °C closing, DC 24V, 0.7A, feedback signal)
  • BFD actuators: external DL-φ-1 / internal DL-φ-4 (220V, 12W, −20 °C to +40 °C ambient)

For explosion-protected fans (DTF, BT35-11, DFBZ/BDFBZ, BWEX), sources reference GB 3836 with markings such as ExdbIIBT4, ExdbIICT4, and ExdIIBT4. Gas marking does not prove dust certification: Ex d IIC T6 Gb covers explosive gas atmospheres; combustible dust requires a separate dust certificate.

Documented Certificate
CE21.1729 (BFHF / BFD Explosion-Proof Dampers)
Ex Protection Class
Ex d IIC T6 Gb · IP65 Enclosure Protection
Fan Ex References
GB 3836 (ExdbIIBT4 / ExdbIICT4 / ExdIIBT4)
Jurisdiction Rule
ATEX / IECEx confirmed per order configuration
View Ex Dampers Request Ex Certificate
Explosion proof actuator housing on HVAC damper in chemical processing facility
BFHF / BFD Ex d IIC T6 Gb Actuator Interface
Gas vs Dust Distinction:

Never shorten Ex d IIC T6 Gb to generic “explosion-proof certified”. If combustible dust is present, request dust-specific marking and test evidence.

Evidence 02 · Fire Smoke Control 280 °C / 30 Minutes · Function Specific

Fire & Smoke-Exhaust Documentation (DTF, HTFC, FHF, PFHF, PYF)

Fire-duty documentation is strictly configuration-specific. YONGFAN’s DTF source documents relevant fire-rated builds for 280 °C / 30 minutes emergency smoke exhaust under Chinese fire codes (GB 50016, GB 50067, GB 50038).

Ordinary ventilation fans with the same casing size do not inherit fire ratings. Furthermore, fire damper documents are function-specific:

  • FHF: Normally open fire damper; closes automatically at 70 °C
  • PFHF: Smoke-exhaust fire damper; higher-temperature closing function (280 °C)
  • PYF: Normally closed smoke-exhaust damper; opens upon fire alarm command
  • BFHF: Explosion-proof fire isolation damper (CE21.1729)
Smoke Exhaust Rating
280 °C / 30 Minutes (DTF Fire-Rated Build / HTFC)
Damper Logic Proof
FHF (70°C NO) · PFHF (280°C) · PYF (NC Fire Open)
Governing Codes
GB 50016 · GB 50067 · GB 50038
Test Verification
High-temperature fire furnace endurance testing
View Fire Dampers Request Fire Test Data
Fire damper and smoke exhaust fan testing facility under high temperature conditions
280 °C / 30 Min High-Temperature Fire Testing
Functional Separation:

A 70 °C fire-isolation document (FHF) cannot approve a 280 °C smoke-exhaust damper (PFHF) or an Ex damper (BFHF). Match document to function.

Evidence 03 · Filtration & Cleanrooms MPPS Scan Testing · Fractional Efficiency

Air Filter Test Reports & HEPA/ULPA Individual Scan Testing

Air filters utilize performance classification test reports rather than one universal certificate. General ventilation filters reference ISO 16890, GB/T 14295, and legacy EN 779 terminology across gravimetric, particle-counting, and initial resistance tests.

High-Efficiency Scan Testing: YONGFAN high-efficiency filters (GCDZ series) are 100% individual scan-tested for pinhole leakage and frame-seal integrity (using oil-thread / aerosol challenge per ISO 29463 / EN 1822 / GB/T 13554) before release. Factory test reports verify the filter element — they do not automatically qualify the room’s ISO 14644 classification, which requires on-site commissioning.

General Filter Standards
ISO 16890 · GB/T 14295 · Legacy EN 779
HEPA/ULPA Standards
ISO 29463-1:2024 · EN 1822 · GB/T 13554
Individual Scan Proof
100% factory scan testing for pinhole & gasket leaks
Scope Boundary
Factory filter scan ≠ installed cleanroom certificate
View HEPA Filters Request Filter Test Report
Automated aerosol scan test rig verifying HEPA filter frame and media pack integrity
Individual HEPA / ULPA Factory Scan Test
Custom Sizes Note:

A test report for a standard 610×610 mm filter does not automatically cover a custom frame depth or alternative gel seal unless specified in the test scope.

Evidence 04 · Pressure Vessels & Hydronics 1.25× Hydrostatic Proof · Material Traceability

Heat Exchangers, Hydronic Skids & Control Valves

Pressure-bearing equipment requires material traceability and hydrostatic test records. YONGFAN source files for storage (U-tube, floating-coil) and plate heat exchangers reference GB 150 and GB 151, with hydrostatic testing at 1.25× design pressure for the vessel shell and tube bundle.

Hydronic Skids (JFWZ / JFHB / JFWP): Combines pump documentation, sensor calibration, pressure testing, and CE/LVD/EMC documentation where available for export projects.
Hydraulic Valves (100X–900X): Tested under GB/T 13927 / EN 12266-1 / API 598 for shell strength and seat tightness.

Pressure Vessel Standards
GB 150 · GB 151 (Hydrostatic 1.25× design pressure)
Material Traceability
Material test certificates (MTR) for vessel plates & tubes
Export Skid Compliance
JFWZ / JFHB CE / LVD / EMC documentation for EU export
Valve Testing
GB/T 13927 · EN 12266-1 · API 598 shell/seat proof
View Storage Heat Exchangers Request Vessel Test Log
Hydrostatic pressure testing rig for commercial heat exchanger and hydronic booster pump skid
1.25× Hydrostatic Vessel Pressure Proof
Code Jurisdiction:

GB 150 / GB 151 references prove Chinese pressure vessel compliance. Confirm ASME Section VIII or European PED approvals separately if required.

04 / Pre-Submittal Audit

10-Point Certificate Review Checklist

Ask these ten questions before including any product certificate or test report in a consultant submittal package.
CHECK 01

Product Family Identity

Does the certificate identify the exact equipment family (e.g. BFHF vs FHF, DTF vs DTXF)?

CHECK 02

Model Range Coverage

Does it cover the exact model size or an unambiguously applicable dimensional envelope?

CHECK 03

Protection & Performance

Does the marking (e.g. Ex d IIC T6 Gb, 280°C/30min, MPPS 99.99%) match project specs?

CHECK 04

Technical Standard Match

Does the cited standard (GB 3836, ISO 5801, ISO 29463) match the consultant’s code basis?

CHECK 05

Manufacturer Relationship

Is the certificate holder, manufacturer, and production factory relationship clearly stated?

CHECK 06

Critical Options Scope

Are specific motors, voltages (24V/220V/380V), and actuators inside the certified scope?

CHECK 07

Document Currentness

Is the certificate active, valid, and unexpired for the project procurement cycle?

CHECK 08

Destination Acceptance

Does the destination market authority accept the certificate scheme (CE, GB, UL, IECEx)?

05 / Request Protocol

How to Request a Product Certificate or Test Report

Send the following parameters to ensure our compliance team retrieves the exact document covering your offered model configuration.
Document Dispatch

10 Parameters for Certificate Requests

Providing complete information prevents sending a document that appears relevant but does not cover the specific ordered configuration.

1. Product Category & Exact Model Code
2. Project Name & Destination Country
3. Required Document Type (Cert vs Test Log)
4. Required Standard & Scheme (ISO, GB, IEC)
5. Fire Rating Requirement (Temp & Duration)
6. Complete Ex Marking & Hazardous Zone
7. Filter Efficiency Class & Scan Requirement
8. Pressure Vessel Design Code & Test Pressure
9. Motor Voltage, Phase & Actuator Options
10. Language or Legalized Copy Requirements
06 / Technical Q&A

Certificates Frequently Asked Questions

Answers to key questions regarding universal certificate claims, CE21.1729, ATEX vs GB 3836, HEPA scan reports, and pre-order requests.

Does YONGFAN have one certificate that covers every product?

No. Certification and test evidence are product- and configuration-specific. Fans, filters, heat exchangers, and dampers undergo different test standards.

Which YONGFAN certificate number is documented for explosion-proof dampers?

The current BFHF/BFD source identifies CE21.1729 with the documented Ex d IIC T6 Gb (IP65) configuration.

Does CE21.1729 mean the damper is ATEX or IECEx certified?

The retrieved source documents Chinese national GB 3836 certification. Request market-specific ATEX or IECEx certificates if required by project specifications.

Are DTF explosion-proof models ATEX certified?

The supplied DTF source documents GB 3836-based configurations such as ExdbIIBT4 / ExdbIICT4. Project-specific Ex certification should be confirmed per order.

Is the DTF fire rating the same as its Ex rating?

No. The documented 280 °C / 30-minute fire-duty configuration and the explosion-proof configuration are separate engineering builds.

Does a HEPA scan test certify the cleanroom?

No. It verifies individual filter media and gasket integrity under factory testing. Cleanroom ISO 14644 classification requires on-site room commissioning.

Can I use a referenced ISO or GB standard as a certificate?

No. A standard reference explains the technical test basis. A certificate or test report is independent evidence issued for that specific product.

Are certificates available for every standard filter?

Standard filters carry factory batch test reports. High-efficiency HEPA/ULPA grades receive individual factory scan test certificates.

Can I request a certificate before placing an order?

Yes. For project review and consultant submittals, request applicable documentation against the proposed model and configuration.

Why does YONGFAN ask for destination country?

Certification acceptance differs globally. Knowing the destination prevents submitting a GB or CE document where local standards (e.g. UL, ASME, AHRI) are mandatory.

07 / Verification Boundaries

Verify the Scope, Not the Badge

The technical value of a certificate lies entirely in its scope. When one link in the compliance chain is missing, the document may not support the equipment being supplied.
Boundary 01 / No Universal Badge

Product-Specific Scope

One certificate cannot cover fans, filters, heat exchangers, and valves simultaneously. Match document to hardware.

Boundary 02 / Gas vs Dust Ex

Hazard Profile Scope

Ex d IIC T6 Gb is a gas-atmosphere flameproof certification. It cannot be used as proof of combustible dust certification.

Boundary 03 / Part vs System

Component Scope

A certified Ex actuator or fan motor does not certify unverified ductwork, switches, or downstream terminal boxes.

Boundary 04 / No Fake Downloads

Verified Records Only

YONGFAN only issues verified, traceable documents tied to actual manufactured configurations and tested units.

08 / Document Handoff

Request a Product Certificate

Send your equipment schedule, proposed model numbers, and required certification schemes — YONGFAN application specialists will verify compliance and provide authentic documentation for your submittal package.

CE21.1729 (Ex d IIC T6 Gb Damper) 280°C / 30 Min Smoke Exhaust Proof HEPA Individual MPPS Scan Test ISO 5801 Fan Performance Curves 1.25× Hydrostatic Vessel Log 100X–900X Valve Seat Leakage Proof
Request Certificate Documentation View Standards Guide Contact Technical Support
Engineers reviewing compliance certificates and test logs on industrial site
YONGFAN Quality & Compliance Team
Product certificates, third-party test reports & material traceability documents.
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