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Industrial Facilities HVAC & Process Ventilation | YONGFAN
Heavy-Duty Process Air & Plant Utilities

Industrial Facilities: Workshop Ventilation, Process Air & Utilities

Industrial ventilation must withstand hot process fumes, high dust loading, corrosive exhaust, localized heat plumes, and harsh plant utility operating conditions.

Compare YONGFAN T35-11 / BT35-11 bifurcated axial fans (motor isolated from airstream up to 80°C), DTF high-pressure in-duct fans, WGP industrial exhaust scrubbers, gasketed plate heat exchangers, and JFGP electronic water treatment.

Hot Fume Fans T35-11 Bifurcated (80°C)
High-Pressure In-Duct DTF to 114,829 m³/h · 2,266 Pa
Process Scrubbers WGP to 100,000+ m³/h
Process Metallurgy 316L · Titanium · Hastelloy
Plan Industrial HVAC Review Operating Risks
Industrial manufacturing plant with heavy duty process ventilation fans and ductwork
Industrial Process Engineering Motor-Out-of-Airstream Bifurcated Fans, High-Pressure Axial Ducting & Chemical Scrubbing
01 / Failure Mechanisms

Workshop Air Is Not Uniform or Passive

Industrial failure modes stem from treating heavy manufacturing environments like commercial buildings: standard motors burn out in hot airstreams, fans stall under duct system effects, and heat exchangers foul under dirty cooling water.
Heavy industrial manufacturing workshop with welding and machining operations
Severe Industrial Duty

Separating General Ventilation from Local Process Exhaust

Per NIOSH Industrial Ventilation (LEV) and ISO/TR 16219:2024, captured process contaminants require isolated motor bypass fans and specialized duct pressure margins.

Motor Winding Burnout in Hot Exhaust

Standard direct-drive axial fans installed in 60–80°C drying ovens or exhaust ducts overheat as hot, moist air continuously washes over motor windings.

Impact: Catastrophic motor insulation failure & line halt

Duct System Effect Aerodynamic Stall

Fitting elbows or abrupt transitions directly against fan inlets distorts blade velocity profiles, causing up to 40% loss of catalog pressure and airflow.

Impact: Workshop fume capture collapse & severe vibration

Cooling Loop Scale & Heat Exchanger Fouling

Hard industrial cooling tower water scales heat exchanger channels, choking flow and causing critical machinery oil coolers to trip on high temperature.

Impact: Thermal shutdown of hydraulic presses and furnaces

Uncertified Flammable Vapor Fan Deployment

Installing standard ventilation fans in paint spray booths or battery charging rooms introduces an uncertified ignition source into a solvent-rich zone.

Impact: OSHA safety non-compliance & explosion hazard

The Four Engineering Dimensions of Industrial Facilities

Industrial HVAC requires coordinating airstream temperatures, static pressure margins, metallurgy, and water scale mitigation.

01 Motor-Out-of-Airstream Bifurcated Fans
02 High-Pressure Axial In-Duct Systems (2,266 Pa)
03 WGP Deep-Bed Gas & Solvent Scrubbers
04 JFGP Non-Chemical Water Descaling & PHE
02 / Equipment Lineup

Engineered Equipment for Manufacturing & Plant Utilities

Heavy-duty product families for hot process exhaust, high-pressure duct ventilation, industrial chemical emissions, and circulating cooling water loops.
Architecture 01 · T35-11 / BT35-11 Motor-Out-of-Airstream · 80°C Continuous

T35-11 & BT35-11 Bifurcated Process Exhaust Fans

The premier industrial solution for hot, humid, or corrosive fumes. The T35-11 platform isolates the electric motor inside a central bypass tunnel completely removed from the aggressive process airstream, allowing continuous operation in temperatures up to 80°C.

Published across Ø280–Ø1050 mm impeller sizes, 552 to 58,343 m³/h airflow, and 32 to 420 Pa static pressure with five factory-set blade pitch angles (15° to 35°). The BT35-11 variant adds GB 3836 explosion-proof motors and non-sparking brass/aluminum rub rings for Zone 1/2 solvent areas.

Motor Isolation
Central bifurcated tunnel isolated from airstream
Airstream Limit
Standard continuous operation up to 80°C
Capacity Scope
552 – 58,343 m³/h · 32 – 420 Pa
Hazard Rating
BT35-11 ExdbIIBT4 / IICT4 under GB 3836
Corrosive Acid Boundary: For heavy acid vapors (HCl, HF, nitric acid), specify epoxy coating, 316L stainless casing, or FRP composite impeller construction.
View T35/BT35 Details Request Fan Sizing
Industrial bifurcated axial fan with motor outside hot process airstream
T35-11 / BT35-11 Bifurcated Axial Fan
Key Workshop Duties:
  • Industrial drying ovens and curing tunnels
  • Welding smoke and paint spray booth exhaust
  • Chemical storage room continuous purge
  • High-moisture industrial washing operations
Architecture 02 · DTF Series High Pressure · to 2,266 Pa · 280°C / 30 min Fire

DTF High-Pressure Axial Tube Exhaust Fans

Long industrial duct networks and heavy baghouse filter banks demand high static pressure head. The DTF series provides cylindrical in-line axial airflow with guide vanes for high pressure recovery.

Covering Ø350 to Ø1600 mm diameters, 1,886 to 114,829 m³/h airflow, and 115 to 2,266 Pa total pressure. Available in direct-drive or belt-drive arrangements, GB 3836 explosion-proof builds (ExdbIIBT4/CT4), and certified 280°C / 30 min high-temperature smoke clearing configurations.

Capacity Range
1,886 – 114,829 m³/h · 115 – 2,266 Pa
Impeller Diameters
Ø350 mm to Ø1600 mm (0.5 to 45 kW)
Smoke Certification
Certified 280°C / 30 min continuous smoke clearing
Wall Fan Option
DFBZ square wall fan for general plant cross-flow
System Effect Margin: When connecting duct elbows directly to DTF inlets, add a minimum of 1.5–2.5 duct diameters of straight duct or include system effect pressure allowances.
View DTF Fan Data Request DTF Sizing
DTF industrial high pressure axial tube exhaust fan installed in manufacturing plant duct
DTF High-Pressure In-Duct Axial Fan
Key Capabilities:
  • Direct in-line cylindrical duct installation
  • Static pressure up to 2,266 Pa for long duct runs
  • Dual-speed motor options for day/smoke duty
  • Heavy-gauge rolled steel casing with welded flanges
Architecture 03 · WGP Series Industrial Emissions · Custom to 100,000+ m³/h

WGP Industrial Exhaust Gas & Odor Treatment Units

Industrial facilities emitting acid vapors, solvent VOCs, or foul odors require heavy-duty molecular adsorption before discharging to atmosphere.

The WGP Exhaust Gas Treatment Unit is customized from several thousand to 100,000+ m³/h. Combines washable primary particulate filtration → deep activated carbon beds (iodine ≥1,000 mg/g, CTC ≥60%, hardness ≥95%) → target-gas chemisorption stages. Treats H2S, SO2, Cl2, NH3, VOCs, and welding fumes.

Capacity Scope
Custom engineered to 100,000+ m³/h
Carbon Quality
Iodine ≥1,000 mg/g · CTC ≥60% · Hardness ≥95%
Target Gases
Acid gases, Solvent VOCs, Mercaptans, NH3
Safety Features
Gas detector interlock · Fire trip isolation
Pre-Treatment for Oil Mist: Exhaust streams containing heavy oil aerosols or metal grinding dust must pass through washable metal mesh (CNL/CJS) or cyclone separators before entering carbon beds.
View WGP Scrubber Request Scrubber Sizing
WGP industrial exhaust gas scrubber skid installed on manufacturing plant roof
WGP Industrial Exhaust Scrubber Skid
Target Industrial Emissions:
  • Paint booth & solvent drying VOCs
  • Metal pickling and plating acid fumes (HCl, H2SO4)
  • Rubber vulcanization and plastic extrusion odors
  • Wastewater sump and battery room exhaust
Architecture 04 · PHE & Descaling Process Metallurgy · JFGP Non-Chemical Water

Process Plate Heat Exchangers & Circulating Water Treatment

Industrial machinery cooling and waste heat recovery require corrosion-resistant metallurgy and chemical-free scale management across cooling water and process utility loops.

Gasketed Plate Heat Exchangers (4–900 m³/h, DN15–DN250, up to 2.5 MPa, 170°C): Plate options in 304, 316L, Titanium TA1 (high-chloride fluids), and Hastelloy (acids).
JFGP Electronic Water Descaling: High-frequency inline physical treatment (≤700 mg/L CaCO3, ≤95°C) with 5,000V dielectric insulation testing.
Broad-Spectrum Induction: Wrap-around external coils for heavy scale (≤2,000 mg/L CaCO3).

Plate Materials
316L · Titanium TA1 · Hastelloy · RS-2
Pressure Ratings
1.0 / 1.6 / 2.5 MPa · Hydrostatic proof tested
JFGP Descaling
High-frequency electronic · 5,000V dielectric QA
Induction Water
External coil descaling up to 2,000 mg/L CaCO3
Fluid Chemistry Analysis: High chloride levels in raw well water or process fluids will pit 304/316 stainless steel. Specify Titanium TA1 plates when chloride exceeds 200 ppm.
View Utility Systems Request PHE Sizing
Industrial gasketed plate heat exchanger and JFGP electronic water treatment skid
Plate Heat Exchanger & JFGP Water Skid
Process Utility Roles:
  • Hydraulic oil and compressor cooling loops
  • Induction furnace closed-circuit cooling
  • Chemical reaction vessel temperature control
  • Non-chemical scale prevention for cooling towers
03 / Selection Matrix

Industrial Facilities Component Routing Table

Cross-reference YONGFAN components by industrial plant application, supplier boundaries, and the first technical confirmation input.
Plant Application First YONGFAN Route Supplier-Supported Boundary First Input to Confirm Specification Action
Hot process exhaust (up to 80°C)
T35-11 Bifurcated Fan
 Motor isolated from airstream; up to 80°C Airflow, static pressure, gas temperature Configure T35
Flammable solvent / gas exhaust
BT35-11 / DTF Ex Build
 GB 3836 ExdbIIBT4 / IICT4 ratings Hazardous zone, gas group & temperature class Configure BT35
High-pressure in-line duct exhaust
DTF Axial Tube Fan
 1,886–114,829 m³/h · 115–2,266 Pa Airflow + external static pressure Configure DTF
Workshop side-wall cross ventilation
DFBZ / BDFBZ Wall Fan
 Low-noise square wall-mount axial fan Wall cutout dimensions + design CFM Configure DFBZ
Process exhaust gas & VOC treatment
WGP Scrubber Unit
 Several thousand to 100,000+ m³/h Full gas composition, temperature & ppm Configure WGP
Heavy oil mist & welding pre-filter
CNL / CJS Washable Mesh
 Washable aluminum/stainless mesh · ≤10–15 Pa Face dimensions and oil/particulate loading Configure Mesh
Emergency plant smoke extraction
DTF / HTFC Smoke Fan
 280°C / 30 min fire-certified builds Fire smoke flow rate and external static Configure Smoke
Process cooling & heat recovery
Gasketed Plate Exchanger
 4–900 m³/h · 316L / Titanium / Hastelloy Fluid chemistry, chloride level & 4 temperatures Configure PHE
Cooling tower electronic descaling
JFGP / Induction Unit
 JFGP (≤700 mg/L); Induction (≤2,000 mg/L) Circulating water analysis report Configure JFGP
04 / Procurement Protocol

Information Required for an Industrial HVAC Quotation

Providing complete process gas temperature, static pressure margins, electrical hazard ratings, and fluid chemistry ensures exact equipment sizing.
STEP 01

Process Air Temperature

State design airflow, external static pressure, operating gas temperature (ambient vs 80°C vs 280°C fire), and Zone 1/2 hazardous classification.

STEP 02

Dust & Fume Capture

Provide particulate type (welding smoke, oil mist, abrasive dust), concentration, and whether washable metal pre-filters are required.

STEP 03

WGP Exhaust Treatment

Provide full gas analysis, target chemical species (acids, bases, solvent VOCs), peak concentration (ppm), and local stack emission limits.

STEP 04

Hydronics & Metallurgy

State thermal duty, hot/cold side temperatures, fluid chloride content, operating pressure (up to 2.5 MPa), and circulating water hardness.

Engineering Handoff

Required Parameters for Industrial Quotes

Submit your plant process schedules and mechanical drawings. YONGFAN application engineers will verify motor isolation, fan static curves, and plate metallurgy.

1. Process Gas Temperature (Ambient / 80°C / 280°C)
2. Design Airflow & External Static Pressure (Pa)
3. T35-11 / BT35-11 Motor Bypass Isolation
4. Hazardous Area Classification (Zone 1/2 Ex)
5. WGP Scrubber Gas Composition & ppm
6. PHE Fluid Metallurgy (316L / Titanium / Hastelloy)
7. Cooling Water Hardness & JFGP Descaling
8. 280°C / 30 min Fire Smoke Extraction Rating
05 / Manufacturing Verification

Quality Assurance for Heavy Industrial Duty

Dynamic impeller balancing, high-temperature fire burn testing, and hydrostatic pressure verification for severe plant reliability.
Dynamic Balancing

ISO 1940 Grade G2.5

Every industrial fan wheel is dynamically balanced to Grade G2.5 or better to prevent mechanical vibration wear on bearings and duct joints.

Motor Isolation

Bifurcated Tunnel QA

T35/BT35 motor isolation chambers undergo airtight seal checks to ensure zero flue gas leakage into the isolated motor ventilation corridor.

PHE Proof Test

Hydrostatic Pressure QA

Plate heat exchangers are hydrostatically proof-tested at 1.25–1.5× design pressure with separate-side and cross-leakage verification.

Water Treatment

5,000V Dielectric Testing

JFGP electronic water descalers undergo 5,000V dielectric insulation testing and pipe hydrostatic pressure testing at 1.5× working pressure.

06 / Engineering Knowledge

Industrial Facilities Frequently Asked Questions

Technical answers to key selection questions regarding bifurcated fans, high-pressure axials, WGP scrubbers, and electronic water treatment.

Why use a bifurcated fan for hot workshop exhaust?

T35-11 bifurcated fans house the electric motor in an isolated central bypass tunnel. The aggressive, hot airstream flows around the motor enclosure rather than directly over the windings, enabling continuous operation in up to 80°C air without motor failure.

What is the difference between T35-11 and BT35-11?

T35-11 is the standard industrial bifurcated fan for hot/corrosive air. BT35-11 adds GB 3836 explosion-proof motors (ExdbIIBT4/CT4) and non-sparking mechanical rub rings for Zone 1/2 flammable gas and solvent vapor environments.

When should DTF be selected over standard axial fans?

Use DTF when the exhaust system involves long duct runs, elbows, or filter banks requiring high static pressure head (up to 2,266 Pa) or when 280°C / 30 min certified emergency smoke clearing is required.

How does WGP treat industrial VOCs and acid gases?

The WGP Exhaust Gas Treatment Unit uses multi-stage deep beds of virgin activated carbon (iodine ≥1,000 mg/g, CTC ≥60%) paired with target-gas chemisorption media to adsorb and chemically neutralize acid fumes, solvent VOCs, and process odors before stack discharge.

How does JFGP electronic descaling protect cooling towers?

JFGP applies high-frequency electromagnetic fields that alter the crystal morphology of dissolved calcium bicarbonate, converting hard calcite scale into loose, non-adherent aragonite sludge that flushes out easily without chemical biocide additions.

When are Titanium TA1 plates required in heat exchangers?

Standard 304/316L stainless steel suffers pitting and chloride stress corrosion cracking when fluid chloride content exceeds 150–200 ppm. Titanium TA1 plates provide total immunity to chloride attack in saline, brackish, and chemical process fluids.

Can the same DTF fan serve daily workshop exhaust and fire smoke?

Yes, provided the specific ordered model is certified for 280°C / 30 min fire duty and equipped with a dual-speed motor configured for low-speed daily exhaust and high-speed emergency smoke evacuation.

Does YONGFAN supply heavy baghouse dust collectors?

YONGFAN manufactures process exhaust fans, chemical scrubbers, and staged HVAC filtration banks. Heavy pulse-jet baghouse collectors and cyclone separators are typically supplied by specialized dust collection manufacturers.

07 / Application Boundaries

Industrial HVAC Scope Ends at the Component Interface

Understanding system boundaries ensures clear delineation of engineering responsibilities across manufacturing plant mechanical contracting.
Boundary 01 / Process Machinery

Not Process Tool Builders

YONGFAN manufactures ventilation fans, gas scrubbers, and heat exchangers; production furnaces, stamping presses, and machine tools belong to equipment builders.

Boundary 02 / Stack Permitting

Environmental Compliance

WGP units provide high-efficiency chemisorption stages; environmental stack permitting and continuous emission monitoring (CEMS) remain owner scope.

Boundary 03 / Dust Explosion

ATEX / NFPA 68 Venting

Combustible dust collection systems require specialized NFPA 68 explosion venting and suppression systems engineered by dedicated dust control specialists.

Boundary 04 / Media Saturation

Routine Adsorption Testing

WGP chemical media must be periodically tested for gas breakthrough; differential pressure gauges alone do not indicate chemical carbon saturation.

08 / Engineering Handoff

Plan Industrial Facility HVAC Components

Send your workshop ventilation schedules, process gas temperatures, static pressure requirements, and plant hydronic parameters — YONGFAN application engineers will configure robust bifurcated fans, axial duct units, and plate heat exchangers.

T35-11 80°C Motor Bypass BT35-11 Zone 1/2 Ex Rating DTF to 114,829 m³/h · 2,266 Pa WGP Scrubber to 100,000+ m³/h PHE 316L / Titanium / Hastelloy JFGP Non-Chemical Water Descaling
Request Industrial Sizing Go to Selection Center Contact Technical Support
Engineers reviewing industrial manufacturing plant mechanical ventilation and heat exchange drawings
Industrial Application Engineering
Motor isolation verification, high-pressure duct fan curves & process fluid metallurgy selection.
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