Specialist fan engineering
Industrial fans.
Powering progress.
From the buildings we work in to the infrastructure we rely on. Engineered ventilation for a world that never stands still.
Inside TWOSUN manufacturing
Axial flow fansCentrifugal fansJet fans
30+
Years in ventilation
100,000+
m² of company grounds
500+
Dedicated employees
70+
Engineering professionals
60+
Patents
Our product portfolio
The right airflow.
For every challenge.
Five specialist ranges. One experienced partner for fans, dampers and silencers.
01 / TWOSUN
Metro & tunnel
DTF AXIAL · SDS JET FANS
Purpose-built airflow for underground networks and road tunnels.
Explore range
02 / TWOSUN
Industrial centrifugal
PROCESS · EXHAUST · HIGH PRESSURE
Engineered for the demands of industrial air movement.
Explore range
03 / TWOSUN
HVAC & buildings
AXIAL · ROOF · CABINET FANS
Complete ventilation solutions for the built environment.
Explore range
04 / TWOSUN
Nuclear power
NUCLEAR-GRADE · SPECIALIST SYSTEMS
Specialist ventilation for critical power infrastructure.
Explore range
05 / TWOSUN
Marine ventilation
AXIAL · CENTRIFUGAL · MARINE
Air movement designed for shipboard environments.
Explore range
Not sure which fan fits your project?Start with your application, airflow and pressure requirements.
Product breadth
Ventilation fans.
Refine your selection.
Browse the series, applications and system components behind each specialist range.
01 / BUILDINGS & HVAC
Building ventilation.
Matched to your space.
Axial, roof, cabinet and duct fans for the built environment.
HTFC-I cabinet fan
Series & configurations
HTFSWFHL3-2APYHLT35-11DWTHTFCRTCRSCGDF
Typical applications
- Commercial buildings & hotels
- Stations & airports
- Industrial plants
02 / METRO & TUNNELS
Underground networks.
Purpose-built airflow.
Axial and jet fan systems for underground ventilation and smoke control.
SDS jet fan
Series & configurations
DTFDTF(R)SDSSDS(R)DampersSilencers
Typical applications
- Metro systems
- Road, city & railway tunnels
- Normal ventilation & smoke control
03 / INDUSTRIAL
Demanding processes.
Specialist fan configurations.
Centrifugal fans for process exhaust, dust handling and high-pressure duties.
6-48 centrifugal fan
Series & configurations
4-724-796-488-099-199-26D-type high-temp
Typical applications
- Process exhaust
- Dust handling
- High-pressure & high-temperature duties
04 / NUCLEAR POWER
Critical infrastructure.
Project-specific ventilation.
Specialist equipment for nuclear and conventional-island ventilation.
Nuclear-grade centrifugal fan
Series & configurations
Nuclear-grade axialNuclear-grade centrifugalRoof fansFresh-air unitsFire dampers
Typical applications
- Nuclear power infrastructure
- Conventional-island ventilation
- Project-specific documentation
05 / MARINE
Life at sea.
Airflow for shipboard duty.
Axial and explosion-proof configurations selected for shipboard environments.
Open-type marine axial fan
Series & configurations
Marine axialExplosion-proof axialOpen-type axial
Typical applications
- Shipboard ventilation
- Explosion-proof configurations
- Model-specific marine approval
30+
Years of focus.
A future in motion.
Meet TWOSUN FANS
Engineering air.
Building confidence.
Zhejiang Shuangyang Fans Holding Co., Ltd.
We bring design, manufacturing and technical support together to solve demanding ventilation challenges. From everyday building services to specialist infrastructure, our focus is the same: the right solution, carefully engineered.
Application-led engineeringIntegrated manufacturingIn-house laboratory testingResponsive technical support
Built where engineering meets production.
Large-scale fan manufacturing, process control and in-house technical support under one coordinated operation.
Inside our factory
More capability.
More control.
TWOSUN combines automated fabrication processes with material selection, structural design and protective finishing to support consistent product accuracy and long-term service.
01 / CUT
Laser cutting
Automated sheet processing supports accurate components and repeatable geometry.
02 / FORM
CNC bending
Controlled forming helps maintain dimensional consistency across fabricated parts.
03 / SHAPE
Hydraulic forming
Forming processes support robust housings and application-specific construction.
04 / JOIN
Robotic welding
Automated welding is used as part of the production workflow for consistent fabrication.
CNC BENDING
FAN ASSEMBLY
Industries & applications
Where performance
becomes essential.
Different environments. Different demands. Ventilation engineered around the way your world works.
01 / APPLICATION
Industrial processes
Airflow that keeps industry moving.
02 / APPLICATION
Metro & tunnels
Ventilation for a connected world.
03 / APPLICATION
Nuclear power
Engineered for critical environments.
04 / APPLICATION
Commercial buildings
Better airflow. Better spaces.
05 / APPLICATION
Marine & shipbuilding
Reliable ventilation on board.
Ventilation solutions for buildings, industry and critical infrastructure. Application images are illustrative.
Why TWOSUN FANS
Engineering depth behind every fan system.
More than product supply: TWOSUN brings together design, automated production, accredited testing and responsive service for long-term operating confidence.
01 / PRECISION
Automated Manufacturing
Laser cutting, CNC bending, hydraulic forming and robotic processes help maintain repeatable dimensional accuracy from batch to batch.
02 / PROCESS
Controlled Fabrication
Structured production routes, engineered material selection and anti-oxidation powder coating support durable construction and long-term operation.
03 / VERIFICATION
CNAS Laboratory Testing
In-house accredited laboratory capability supports fan performance verification. Test scope and records are confirmed for the selected equipment and project.
04 / SUPPORT
Responsive Project Service
Engineering communication, inspection, packing, shipment and after-sales response form a complete project support chain.
From design to delivery
Precision in every process.
Confidence in every fan.
Quality is not a final step. It is built into material selection, automated manufacturing, product testing and the support behind every delivery.
Purpose-built manufacturing. Real engineering at scale.
Laser cutting, CNC bending, hydraulic forming and robotic welding help achieve consistent product geometry and manufacturing accuracy.
Laser cuttingCNC formingRobotic welding
Our in-house testing capability supports aerodynamic performance measurement, balancing and inspection. Discuss the test records required for your selected equipment.
CNAS laboratoryPerformance testingInspection
Material selection, structural design and protective powder coating are matched to the product. Engineering support connects your operating conditions to the right configuration.
MaterialsStructural designPowder coating
From specification discussions to packing and after-sales support, our team helps keep the project moving with practical information and a direct point of contact.
Project coordinationExport packingAfter-sales support
One connected process. Design → Manufacture → Test → Deliver.
Testing & validation
Measure fan performance.
Document the confidence.
TWOSUN’s in-house laboratory capability supports aerodynamic performance measurement, balancing and inspection. The required test records and qualification scope are confirmed for the selected equipment and project.
CNAS laboratoryAccredited testing capability with project-specific scope confirmation.
Aerodynamic testingPerformance data collection for fan selection and verification.
Balancing & inspectionManufacturing checks support consistent product quality.
Technical recordsRequest the documents relevant to your selected model and duty.
FAN AERODYNAMIC PERFORMANCE DATA COLLECTION ROOM
FULL-SCALE FAN TESTING
ASSEMBLY & INSPECTION
Testing Center
Performance verification before installation.
TWOSUN’s test facilities support aerodynamic, mechanical and material checks so key performance data can be reviewed before products leave the factory.
FULL-SCALE TESTING
Fan performance test capability
Airflow and operating performance are checked with dedicated fan test infrastructure and data acquisition systems.
Dynamic Balance Verification
Rotating assemblies are checked to support smoother, more reliable fan operation.
Rotating Component Inspection
Key rotating parts are measured and reviewed before final assembly.
Laboratory Measurement
Instrumented checks provide traceable data for product quality control.
Material & Strength Checks
Material and mechanical testing support the reliability of structural components.
Quality & qualifications
Trust is built on evidence.
Explore the documentation behind our laboratory, management systems and specialist product capabilities.
Approvals apply to their stated scope and relevant products, not to the entire range. Please request the current documents required for your project. AMCA membership is distinct from AMCA Certified Ratings.
Knowledge & resources
The details behind
your next decision.
PDF / COMPANY PROFILE
A closer look at TWOSUN
Capabilities, facilities and project references.
PDF / METRO & TUNNEL
Airflow below the surface
DTF axial fans, SDS jet fans and system components.
PDF / INDUSTRIAL CENTRIFUGAL
Built for demanding processes
Industrial centrifugal fan ranges and technical information.
Looking for building ventilation or marine fan specifications?
From requirement to delivery
One project.
One connected process.
Technical selection is only part of the job. We connect application requirements with manufacturing, testing, packing and post-delivery support so the project moves forward with fewer handoffs.
01 / DEFINE
Understand the duty
Airflow, pressure, temperature, environment, installation and documentation needs.
02 / ENGINEER
Select & configure
Match fan type, materials, drive arrangement, accessories and system components.
03 / VERIFY
Manufacture & test
Coordinate production, inspection and the agreed performance or qualification records.
04 / SUPPORT
Pack, deliver & respond
Export packing, delivery coordination and a direct point of contact for after-sales needs.
From our factory floor
to your project.
Wooden export packing and coordinated shipment support help protect equipment through the handover from manufacturing to site.
Global focus
Engineering support for international projects.
REGION 01
Middle East
Support for infrastructure, industrial and building ventilation requirements.
REGION 02
Southeast Asia
Product selection and documentation for varied climates and applications.
REGION 03
Europe & the Americas
Technical communication for export-oriented fan and ventilation projects.
Start a conversation
Let’s move your
project forward.
Tell us what you are building. We will help you take the next step toward the right ventilation solution.
EMAIL OUR TEAMangela@zj-syfj.com
CALL TWOSUN+86 575 82365388
VISIT OUR COMPANY
No. 16 Kunlun Road, Shangpu Industrial Zone,
Shangyu District, Shaoxing, Zhejiang, China
Tell us about your project
A few details help us point you in the right direction.
DTF AXIAL · SDS JET FANS
Metro & tunnel fans
Axial flow fans, reversible jet fans, combination dampers and silencers for metro systems and road, city and railway tunnels. Discuss normal ventilation and smoke-extraction requirements with our engineering team.
- DTF / DTF(R) axial flow fans
- SDS / SDS(R) tunnel jet fans
- Combination dampers and silencers
Product selection, operating limits and applicable approvals must be confirmed for the selected model and duty conditions.
PROCESS · EXHAUST · HIGH PRESSURE
Industrial centrifugal fans
A range of centrifugal fans and blowers for process ventilation, industrial exhaust and dust-handling applications. Select the construction, drive arrangement and operating point to match the process, medium and installation.
- 4-72 / 4-79 centrifugal ventilators
- 6-48 dust-exhausting centrifugal fans
- 8-09 / 9-19 / 9-26 high-pressure fans
- D-type transmission high-temperature fans
Product selection, operating limits and applicable approvals must be confirmed for the selected model and duty conditions.
AXIAL · ROOF · CABINET FANS
HVAC & building ventilation
Axial, mixed-flow, roof and cabinet fans for commercial buildings, hotels, industrial facilities, railway stations and airports. Fans can be combined with dampers, silencers and control cabinets to suit the ventilation system.
- HTF / SWF / HL3-2A / T35-11 axial and mixed-flow fans
- DWT / RTC / RSC roof fans
- HTFC cabinet fans and GDF duct fans
- Dampers, silencers and control cabinets
Product selection, operating limits and applicable approvals must be confirmed for the selected model and duty conditions.
NUCLEAR-GRADE · SPECIALIST SYSTEMS
Nuclear power ventilation
Nuclear-grade and non-nuclear-grade axial and centrifugal fans, ventilation units and AP1000 nuclear-island fire dampers. Project documentation and qualification requirements are reviewed against the relevant equipment scope.
- Nuclear-grade axial and centrifugal fans
- Conventional-island and non-nuclear ventilation
- Fresh-air and circulation units
- AP1000 nuclear-island fire dampers
Product selection, operating limits and applicable approvals must be confirmed for the selected model and duty conditions.
AXIAL · CENTRIFUGAL · MARINE
Marine ventilation fans
Marine axial and centrifugal fans, including open-type axial designs and explosion-proof configurations. Material selection, installation requirements and applicable marine approvals are confirmed for the selected product.
- Marine axial flow and open-type axial fans
- Marine explosion-proof axial and centrifugal fans
- Galvanized and stainless-steel multi-wing fans
Product selection, operating limits and applicable approvals must be confirmed for the selected model and duty conditions.
