Is the listed airflow free-air or at static pressure?

The airflow values published in the summary model table (290 to 2,500 m³/h / 171 to 1,471 CFM) represent free-air delivery at 0 Pa static pressure. In real ducted systems, duct friction, elbows, dampers, and filters create static pressure resistance. The actual delivered airflow must be selected by plotting the required CFM against calculated static pressure on the published TSK fan curve.

Which models are confirmed for 220–230V/60Hz?

All eight catalog models—from TSK100 through TSK400—are equipped with single-phase AC external rotor motors rated for 220–230V at 50/60Hz utility frequency, making them fully compatible with Saudi Arabian building electrical standards.

What sound metric and test condition does the catalogue use?

Per page 9 of the manufacturer catalogue, sound ratings (59 to 75 dB) represent sound pressure levels measured at a 1-meter distance, 45° angle in a free zone (free field), without connected ductwork. Installed in-duct sound levels will differ based on duct layout, flexible connectors, silencers, and room acoustic finishes.

Can TSK be used for smoke pressurization or kitchen grease exhaust?

No. TSK fans are strictly for general clean-air ventilation up to 60°C. They do not have fire resistance certification (e.g. 300°C/2h or 400°C/2h) and must not be used for emergency fire smoke extract or life-safety stairwell pressurisation (specify VDO or VPVO series instead). Similarly, commercial kitchen grease hoods require grease-rated fans with approved external motors and drainage.

Can the TSK fan handle humid, dusty, or corrosive air?

The catalogue specifies usage for clean air only. In damp or outdoor environments, continuous fan operation and a proper condensate drainage system are mandatory to prevent moisture accumulation inside the casing. Standard galvanized steel and powder coating cannot withstand corrosive chemical fertilizer vapors, volatile pesticides, or industrial acid gases.

Which speed controller and backdraft damper fit the selected motor?

Because TSK models use single-phase external rotor AC motors, they can be controlled using electronic solid-state voltage speed controllers or step transformers sized for the motor full-load wattage. Matching spring-loaded circular backdraft shutter dampers fit directly over the spigot collars to prevent reverse air backflow when idle.

What is the difference between TSK355/400 table data and curve labels?

In the catalogue data tables for TSK355 and TSK400, working power is listed as 145W and nominal speed as 2,500 RPM. However, the corresponding curve charts (page 6) note '1500RPM AC Max' and '1000RPM AC'. Cloud Electricals provides consultant submittals with verified factory operating points and motor curves to ensure compliance with your project static pressure.

TSK Model Series • 100 to 400 mm (220–230V 50/60Hz)

TSK Steel Circular Inline Duct Fan

Q: Is the TSK fan axial or centrifugal?

The TSK series is a centrifugal inline duct fan with backward-curved single impeller blades ('BS') that discharges air axially in-line with the duct. This combines the high static pressure capability of a centrifugal wheel with the straight-through installation convenience of an axial fan.

Compact steel circular centrifugal inline duct fans with backward-curved impellers for clean-air supply, exhaust, and booster ventilation across commercial buildings, workshops, and facilities in Saudi Arabia.

Request Quote on WhatsApp Call Technical Sales Download TSK Catalogue (PDF, 10.1 MB)

Direct AnswerCompact clean-air centrifugal fan

The TSK is a compact steel circular inline centrifugal duct fan engineered for clean-air supply, exhaust, and booster ventilation in commercial and industrial buildings. Available in 8 duct diameters from 100 mm (4") to 400 mm (16"), it delivers 290 to 2,500 m³/h (approx. 171 to 1,471 CFM free-air catalog rating) powered by a single-phase 220–230V 50/60Hz external rotor motor (max air temperature 60°C). TSK is strictly for clean air and cannot be used for emergency stairwell pressurisation, smoke extraction, kitchen grease hoods, or corrosive chemical fumes; operating airflow must be selected from published curves at project static pressure. Need certified emergency smoke extraction? Explore VDO Smoke Fans.

TSK steel circular inline centrifugal duct fan with galvanized steel casing and backward-curved impeller

TSK Steel Circular Inline Duct Fan

220–230V 50/60Hz AC external rotor motor

Curve-based airflow & static pressure selection

Compact 100–400 mm circular duct connection

TSK Steel Circular Inline Duct Fan

Fan Category

Steel Circular Inline Centrifugal Duct Fan

Product Series

TSK Model Series

Duct Diameter Range

100 to 400 mm (4 to 16 inch)

Airflow Capacity Range

290 to 2,500 m³/h (approx. 171 to 1,471 CFM free-air)

Electrical Supply

1~220–230V 50/60Hz (Single-Phase)

Working Air Temperature

Up to 60 °C (Clean-Air Duty)

Clean-Air Duty & Life-Safety Operating Boundary

CLEAN-AIR APPLICATION & LIFE-SAFETY NOTICE: TSK inline fans are engineered strictly for general clean-air ventilation up to 60°C. They are not rated for emergency smoke control, stairwell or elevator lobby emergency pressurisation, commercial kitchen grease hoods, explosive dust atmospheres, or corrosive chemical/fertilizer vapors. In outdoor or damp environments, continuous fan operation and a condensate drainage system are required per manufacturer guidelines. Emergency life-safety smoke extraction requires certified fire-rated fans such as the VDO series.

Application Check

Is the TSK steel inline fan right for your ventilation layout?

Review approved clean-air duct applications, controlled agricultural guidelines, and excluded severe airstreams.

Approved Clean-Air Duty

Approved Standard Duty

Commercial office, clinic, retail store, and school general ducted exhaust and fresh air supply
Stale air transfer and booster ventilation through long circular spiral or flexible duct runs
Low-noise workshop, light manufacturing, and warehouse comfort ventilation
Commercial building restroom, storage room, and utility area clean-air evacuation

Controlled Humidity & Agricultural Use

Damp Environment Rules

Commercial hydroponic grow rooms and clean greenhouse air circulation (non-chemical)
Agricultural storage ventilation (free of corrosive ammonia, pesticides, or chemical fertilizers)
Damp environment installations requiring continuous fan operation and condensate drainage
Speed-controlled air exchange using approved voltage controllers or transformers

Life-Safety & Severe Airstream Exclusions

Not Approved / Excluded

Emergency stairwell or elevator lobby fire pressurisation (requires dedicated VPVO series)
Emergency high-temperature smoke extraction (requires certified VDO 300°C/400°C series)
Commercial kitchen grease hood exhaust (requires grease-drain upblast roof fans)
Corrosive chemical acid exhaust, fertilizer vapor streams, or explosive dust atmospheres

Model Range & Performance

TSK Centrifugal Inline Duct Fan Model Table

Catalogue performance specifications for TSK100 through TSK400. Noise is tested per catalogue Page 9 standard at 1 m distance (45° free zone, un-ducted). Maximum airflow represents free-air delivery at 0 Pa; project operating airflow must be selected from published curves at design static pressure.

Swipe horizontally to view power, RPM, noise, CMH, CFM, and curve references.

Model	Collar (mm / in)	Power (W)	Speed (RPM)	Noise @ 1m	Max Flow	Approx. CFM	Max Static Pa	Working Temp	Curve Ref
TSK100	100 mm / 4"	68 W	2,500 RPM	65 dB	290 CMH	171 CFM approx.	290 Pa	60 °C	p. 3
TSK125	125 mm / 5"	75 W	2,500 RPM	65 dB	370 CMH	218 CFM approx.	350 Pa	60 °C	p. 3
TSK150	150 mm / 6"	89 W	2,500 RPM	68 dB	740 CMH	436 CFM approx.	330 Pa	60 °C	p. 4
TSK200	200 mm / 8"	127 W	2,500 RPM	70 dB	1,020 CMH	600 CFM approx.	520 Pa	60 °C	p. 4
TSK250	250 mm / 10"	168 W	2,500 RPM	72 dB	1,050 CMH	618 CFM approx.	540 Pa	60 °C	p. 5
TSK315	315 mm / 12.5"	223 W	2,500 RPM	75 dB	1,600 CMH	942 CFM approx.	700 Pa	60 °C	p. 5
TSK355	355 mm / 14"	145 W	2,500 RPM*	59 dB	2,000 CMH	1,177 CFM approx.	280 Pa	60 °C	p. 6
TSK400	400 mm / 16"	145 W	2,500 RPM*	60 dB	2,500 CMH	1,471 CFM approx.	350 Pa	60 °C	p. 6

Curve Selection Guidance: Curve-Based Selection Requirement: Free-air airflow (CMH / CFM) in the table represents maximum delivery at zero static pressure. In real-world ducted installations, duct friction, elbows, dampers, and filters generate system resistance (external static pressure in Pa). Actual delivered airflow must be selected by plotting required CFM against calculated static pressure on the certified TSK performance curves.
* Note on TSK355 & TSK400: Catalogue data tables state 2,500 RPM and 145W, while catalogue curve sheets (p. 6) label curves as '1500RPM AC Max' / '1000RPM AC'. Final duty point selection must be confirmed against project static pressure and motor submittal.

Dimensions & Casing Schedule

TSK Outline Dimensions & Collar Specifications

Dimensions in millimeters for duct connecting collar diameter, outer casing diameter, overall body length, and collar insertion depths across all 8 standard sizes.

Swipe horizontally to compare casing dimensions and collar depths.

Model	Inlet / Outlet Collar	Casing Body Ø	Overall Length L	Inlet Collar Depth	Outlet Collar Depth	Motor Power	Catalogue Page
TSK100	Ø97.5 mm (fits 100 mm / 4")	Ø242 mm	202 mm	24.0 mm	23.0 mm	68 W	Page 3
TSK125	Ø147.0 mm (fits 125 mm / 5")	Ø333 mm	224 mm	25.5 mm	25.5 mm	75 W	Page 3
TSK150	Ø147.0 mm (fits 150 mm / 6")	Ø333 mm	224 mm	25.5 mm	25.5 mm	89 W	Page 4
TSK200	Ø198.0 mm (fits 200 mm / 8")	Ø333 mm	224 mm	27.0 mm	26.5 mm	127 W	Page 4
TSK250	Ø248.0 mm (fits 250 mm / 10")	Ø333 mm	206 mm	27.0 mm	30.0 mm	168 W	Page 5
TSK315	Ø315.0 mm (fits 315 mm / 12.5")	Ø401 mm	233 mm	26.0 mm	25.0 mm	223 W	Page 5
TSK355	Ø353.0 mm (fits 355 mm / 14")	Ø500 mm	410 mm	26.0 mm	25.0 mm	145 W	Page 6
TSK400	Ø398.0 mm (fits 400 mm / 16")	Ø500 mm	410 mm	27.0 mm	27.0 mm	145 W	Page 6

TSK Dimensions & Specifications Schedule

Schedule

Overall collar Ø, body Ø, length, power, and noise schedule

Curve-Based Selection & Operating Point Guide

Engineering

Total system resistance (Pa) vs airflow sizing methodology

TSK inline fan curve-based selection and operating point guide

Product Overview

Compact Centrifugal Inline Engineering

The TSK steel circular inline duct fan is engineered for inline circular duct systems requiring higher static pressure capability than standard axial fans while maintaining a straight-through duct installation profile.

Manufactured with an all-mold galvanized sheet steel casing ('Q') protected by a corrosion-resistant baked powder coating, each unit incorporates a backward-curved single centrifugal impeller ('BS') dynamically balanced to ensure smooth, low-vibration operation.

Equipped with a single-phase asynchronous external rotor AC motor (220–230V 50/60Hz) with integrated auto-reset thermal protection and sealed maintenance-free ball bearings, TSK fans are designed for clean-air supply and exhaust up to 60°C. For life-safety fire smoke ventilation, contractors must specify certified high-temperature fans such as the VDO Smoke Extraction Fan Series.

Key Features

TSK Series Engineering Highlights

Practical advantages of the compact steel circular inline centrifugal duct fan series.

All-mold design construction with durable corrosion-resistant baked powder coating

Backward-curved centrifugal impeller design providing high efficiency with inline axial outlet

Compact cylindrical fan body engineered for direct connection to standard circular ducting

Single-phase asynchronous external rotor motor with integrated thermal overload protection

Wide model size range spanning 100, 125, 150, 200, 250, 315, 355, and 400 mm diameters

Dual 50Hz and 60Hz utility compatibility rated for 220–230V single-phase electrical systems

Sealed maintenance-free ball bearings supporting horizontal, vertical, or angled duct mounting

Certified manufacturing standards complying with CE, ETL, UL, CCC, and ISO 9001 quality systems

Specifications

Category Technical Specifications

Complete technical parameters for TSK steel circular centrifugal inline duct fans.

Swipe horizontally to compare all specifications.

Specification	Engineering Details
Product Category	Inline Fan / Centrifugal Duct Fan
Product Type	Steel Circular Centrifugal Inline Duct Fan
Model Series	TSK Series (TSK-A-XXX BS-A-A-Q)
Impeller Type	Backward-curved centrifugal single impeller (BS) with axial outlet flow
Casing Material	Galvanized sheet steel ('Q') with electrostatically applied baked powder coating
Collar Sizes Available	100 mm (4"), 125 mm (5"), 150 mm (6"), 200 mm (8"), 250 mm (10"), 315 mm (12.5"), 355 mm (14"), 400 mm (16")
Free-Air Flow Range	290 to 2,500 m³/h (approx. 171 to 1,471 CFM free-air catalog rating)
Max Static Pressure	Up to 700 Pa (TSK315) depending on fan model and duct resistance
Acoustic Test Condition	Sound pressure level measured at 1 m distance, 45° angle in free zone without connected ductwork (59–75 dB)
Electrical Supply	Single-phase 220–230V / 50–60Hz AC external rotor motor
Working Air Temperature	Maximum +60 °C continuous airstream temperature (clean air only)
Installation Orientation	Universal mounting: horizontal, vertical, or ceiling suspended with mounting bracket

Accessories

Matching Duct Installation Accessories

Optional duct installation accessories compatible with TSK steel circular inline fans.

Universal Steel Mounting Foot Brackets with Anti-Vibration Grommets

Quick-Release Circular Duct Clamps with Rubber Cushion Lining

High-Temperature Circular Backdraft Shutter Dampers

Electronic Solid-State Speed Controllers / Step Transformers

Inlet & Outlet Circular Protective Wire Mesh Safety Guards

IP55 External Sealed Electrical Connection Terminal Box

Applications

Where TSK Steel Inline Fans Are Deployed

Clean-air ducted supply, exhaust, and air-transfer applications across commercial and light industrial buildings.

General supply-air transfer

Provides clean outside air supply, transfer air, and booster ventilation in ducts

Commercial building exhaust

Removes stale, warm, and stagnant air from offices, shops, and clinic rooms

Hydroponic grow room

Extracts excess heat and humidity from controlled indoor horticultural environments

Low-noise industry

Discharges process heat and ambient air in light manufacturing and workshop zones

Agricultural clean air

Ventilates agricultural storehouses and clean livestock holding facilities

Factory ventilation

Maintains continuous air movement across production floors and maintenance rooms

Circular ducted systems

Connects directly into standard circular spiral ductwork or flexible ducts

MEP contractor supply

Delivered with technical submittal, factory curve, and Saudi commercial compliance

Non-fire clean-air scope reminder: TSK inline fans are presented strictly for general clean-air ventilation. Emergency fire smoke control, stairwell or elevator lobby emergency pressurisation, commercial kitchen grease exhaust, and explosive atmospheres require specifically certified equipment. For high-temperature smoke ventilation, explore our VDO Smoke Extraction Fan Series. For polymer lightweight residential ducting, view the Plastic Inline Duct Fan.

Selection Support

What to Send for Correct TSK Fan Selection

Provide your required operating airflow, calculated duct system static pressure, duct diameter, voltage confirmation, and delivery city in Saudi Arabia. Our technical team will generate verified curve-based selections.

Required operating airflow in m³/h or CFM at actual design static pressure (not free-air CFM)

Total system external static pressure in Pa (ductwork friction, elbows, dampers, and filters)

Nominal circular duct diameter: 100, 125, 150, 200, 250, 315, 355, or 400 mm

Electrical power supply: single-phase 220–230V 60Hz confirmation

Clean-air airstream verification (must be clean air <= 60°C; no grease, smoke, or acid vapors)

Acoustic target at occupied spaces (accounting for in-duct attenuators if required)

Mounting accessories: universal mounting brackets, duct clamps, or backdraft dampers

Project city, delivery schedule, and quantity required in Saudi Arabia

Downloads

Documents & Technical Submittal Files

Download the official TSK steel circular inline fan catalogue (PDF, 10.1 MB, 8 pages) and request technical submittal data sheets for contractor and consultant review.

Download TSK catalogue PDF (10.1 MB)Download PDF

View TSK model dataView Data

View performance curvesView Curves

Request technical submittalRequest Submittal

Request company documents (CR/VAT/COC)Request Compliance

Related Commercial & Industrial Inline Fans

Explore other axial and centrifugal inline fan series for alternative mounting, heavy-duty industrial ducting, or certified fire-smoke extraction.

Plastic Inline Duct Fan

Lightweight polymer mixed-flow inline fan for residential bathrooms and quiet commercial ventilation

View Details

Saudi Fan R/RS Inline Centrifugal Tube Fan

Heavy-duty circular inline centrifugal tube fan with AMCA-certified 60Hz engineering data

View Details

Centrifugal Box Inline Fan

Double-inlet acoustic cabinet fan for large commercial ducted air supply and exhaust

View Details

VDO Axial Smoke Extraction Fan

Certified high-temperature axial fan (300°C/2h & 400°C/2h) for emergency fire smoke extraction

View Details

FAQ

TSK Inline Fan Questions

Clear technical answers for MEP contractors, HVAC engineers, facility managers, and procurement teams in Saudi Arabia.

The TSK series is a centrifugal inline duct fan with backward-curved single impeller blades ('BS') that discharges air axially in-line with the duct. This combines the high static pressure capability of a centrifugal wheel with the straight-through installation convenience of an axial fan.

Quotation Request

Request TSK Steel Circular Inline Duct Fan Quotation

Submit your required operating airflow (CFM or m³/h), system static pressure (Pa), circular duct diameter, 220–230V 60Hz supply, and delivery city in Saudi Arabia. Our engineering team will provide curve-verified selections.

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