- Industrial Centrifugal Fan -- Low Pressure -- High Pressure -- Plug Type -- FRP Centrifugal Fan
- Inline Fan - Axial Fan - Centrifugal Fan - Mixed Flow Fan
- Roof & Sidewall Fan -- Roof Fan -- Sidewall Fan
- DWDI AHU Fan
- Tunnel Fan &
- Induced Fan &
Kitchen Fume Extractor Fan
- EC Fan
- Intelligent Control
- Fresh Air and Heating Unit
- INFINAIR Motor
Metro Tunnel Jet Fans - YFTNV
Airflow Range: 7.9 ~ 70 m³/s
Thrust Range: 220 ~ 3,000 N
Drive Type: Direct drive
Mounting Types: Ceiling hung/ Sidewall mounted
Applications: Mainly used in tunnels, including metro tunnels, road tunnels, railway tunnels and underground car parks.
For reference only. Please contact our sales rep for detailed performance fan curve. Thank you.
Mounted with airfoil blades of great efficiency and low sound, the impellers of YFTNV jet fans have hubs and blades made of high-strength die-cast aluminum alloys. Each impeller has undergone heat treatment, X-ray flaw detection, tensile test, metal processing and dynamic balancing tests to ensure reliable quality. The blade angles are statically adjustable.
The motor is air cooled, squirrel cage and sealed type resistant to damp heat. It is IP55 rated with Class H insulation; Internationally famous bearing brands are used, such as SKF and NSK; The motor lead wire can be connected to the junction box on the fan stack; The grease tube leading all the way from the grease nipple to the fan housing makes greasing and maintenance much easier.
Fan Housing and Mounting Brackets
The laser cutting and plasma cutting processes are used. The housing is automatically welded and formed by spinning. The surface is hot-dip galvanized or coated for better fan strength and corrosion resistance. The mounting brackets are designed based on actual field conditions.
The YFTNV jet fan has silencers of 1 times fan diameter mounted at both the inlet and outlet ends. If sound is a primary consideration, silencers of 2 times fan diameter is recommended. The outer shell is rolled and welded with quality steel sheets. Insulation material with super fine glass fiber is placed inside the silencers between the alkali-free fibrous glass cloth on the outside and a perforated steel inner liner. The streamlined nozzle helps improve flow filed and efficiency.
High Temperature Resistance
The YFTNV jet fan is tested by Tianjin Fire Research Institute of MPS and has obtained CCCf (China Compulsory Certification for fans) certification. The YFTNV jet fan can run for a straight hour at 280 degrees without mechanical, electrical or structural failures and can be used for emergency smoke removal.
The rotor has a low moment of inertia. The rotation of YFTNV jet fan can be reversed smoothly to the rated speed within 30 seconds.
Easy installation and maintenance.
Thrust Test: The test is performed on the special testing equipment designed as per ISO13350 standard.
Sound Test: The fan with and fan without silencers mounted at the inlet and outlet are both tested in open areas (when air velocity is about zero). The sound pressure level is tested at 10m at a 45-degree angle to the fan shaft.
Fan Efficiency: The fan efficiency is defined by the thrust (N) and input power (kW) of the motor.
Tests on airflow, mechanical performance, vibration, start-up time and reverse rotation are performed by INFINAIR lab in line with relevant national and industrial standards.
- Structure Type
The YFTNV jet fan shall be directly driven and the impeller shall be mounted with axial airfoil blades. A streamlined air straightener upstream of the fan inlet shall be mounted. Tube silencers shall be attached to the inlet and outlet ends of the fan with high strength bolts. Steel safety guards shall be mounted on both the inlet and outlet ends of the fan to ensure safe operation.
The YFTNV jet fan includes unidirectional and reversible types. The unidirectional jet fan is designed for ventilation in one direction and can be made under special conditions to have reverse rotation with thrust 50% to 70% of normal rotation. The bidirectional reversible fan can be used for ventilation in two directions with relatively the same thrust and airflow levels.
- Fan Stack
The fan stack shall be formed in quality steel sheet through the processes of rolling, continuous welding, spinning and flanging. Brackets for both the fan stack and motor shall be wholly welded to be strong enough to withstand the dynamic load generated.
The hub and blades of the YFTNV jet fan shall be die-cast with high strength aluminum alloys. X ray flaw detection must be conducted on each blade to ensure manufacturing quality for reliable operation.
Airfoil blades of optimal air performance shall be fastened to hub with high strength lock bolts. Every impeller shall be dynamically balanced. The blade angles shall be statically adjustable to meet different operating conditions.
Silencers shall be a two-layer cylinder structure. The inner layer is perforated sheet and the outer layer is quality steel sheet which is rolled and welded. The super fine glass fiber shall be placed in between and they shall be fire retardant of Class A fire rating, insect-free and damp-proof.
- Surface Processing
The surface shall be treated for corrosion and rust prevention. There shall be at least two layers of primer and finish coat resistance to high temperature. The fan surface shall be galvanized for enduring corrosion prevention on special occasions as required.
The YFTNV jet fan shall be fitted with squirrel cage asynchronous motor of sealed type resistant to damp heat. It is IP55 rated with Class H insulation. The motor lead wire can be connected to the junction box on the fan stack for convenient wiring; The grease tube leading all the way from the grease nipple to the fan housing makes greasing and maintenance much easier.
- Fire Certification
The YFTNV jet fan shall meet the requirements of GA211-2009 GA 211-2009 High Temperature-Resistant Test Methods for Smoke and Heat Exhaust Ventilators in the tests performed by testing agencies designated by China Certification Centre for Fire Products Ministry of Public Security. The fan shall continuously run for at least 60min at 250℃ and obtain certification.
A permanently fixed aluminum nameplate shall clearly display the fan number, product model and serial number (a unique ID for each fan) so that the parts used can be traceable by customers.
Welcome to INFINAIR. This video is about our company, including history, products, value, service, technology, production and future. Integrated with R&D, tailor making, manufacturing, and international service ability, INFINAIR provides you complete, high-quality ventilation and industrial process air solution
INFINAIR is an innovative company which provides environmental and intelligent solutions for all aspects of ventilation systems in both private and public sector. They have been INFINAIR’s core values and commitments to our customers over the years.
Established Since: September 2003
Paid up capital: 50,000,000 RMB
Architectural area: 33,000 ㎡
Address: No. 55 Qingneng Road, Waigang Town, Jiading District, Shanghai, P. R. China
Sales & Service Office:
Our sales and after-sale service network promise easy access to customers anywhere in China. They are located in various locations: Shanghai, Beijing, Shenchen, Jilin, Liaoning, Tianjin, Shanxi, Henan, Shaanxi, Shandong, Jiangsu, Anhui, Zhejiang, Fujian, Zhongqing, Sichuan, Hunan, Hubei, Guangdong, Guangxi, Hainan, Guizhou and XinJiang.
To become the most trusted brand of professional air movement & control solution provider.
To provide the most reliable and user-friendly air movement & control system.
Product value proposition of INFINAIR: Reliable, Convenient, and Novel.
At INFINAIR, we prioritize reliability in our products and services. INFINAIR focuses on high-quality system construction, we commit to the constant improvement of product and service reliability:
R&D ability as the basis of product reliability:
At INFINAIR, R&D ability is at the core of our product reliability. Thanks to the extensive experience, INFINAIR has mastered CFD, FEA and CAD technology, fundamentally and significantly improving product reliability. INFINAIR’s air performance lab and noise lab both play a part in forming a solid foundation for product reliability in terms of test scope and precision, as well as in overall investment and construction scale. Our labs are accredited by CNAS, and INFINAIR also boasts the first lab in Mainland China accredited by the AMCA.
Technology and Equipment Reliability Guarantee:
By continually investing in improvements to processing technology and equipment, INFINAIR constantly increases and improves processing capability and precision, assembly methods, production processes, online monitoring, and pre-distribution testing, guaranteeing an ever-increasing level of product reliability.
Third party certification as further proof for reliability:
INFINAIR possesses various third-party qualifications including: Industrial Product Production License, Explosion-Proof Production License, as well as certifications such as ISO 9001, ISO 14001 and OHSAS 18001 qualifications. Most INFINAIR products are compliance-certified by a third party. INFINAIR is the industry leader in terms of both the number of certifications and how long we have held these certifications.
Quality-management system and ongoing reliability:
INFINAIR utilizes an ISO 9001-compliant quality management system, certified by SGS. We constantly carry out 5S and lean production Six Sigma improvement, meticulously establishing a sustainable quality management system.
-- Complete product configuration and varied impeller forms.
-- Adaptable product selection.
-- Flexible lead time.
-- Quick customization.
-- Prudent product accessory options.
-- By your side service team and quick courier delivery service.
At INFINAIR, we not only pursue products that are like no other, we also pursue innovation. Both of these pursuits aim to give our clients better value.
-- Greater aerodynamic performance, energy-saving ability, and noise reduction ability.
-- Simplified, rationally-developed structures.
-- More convenient installation and use.
-- Low maintenance, low total cost of ownership.
-- Adaptable and pragmatic post-sale service.
INFINAIR laboratory is the first AMCA accredited air performance and sound testing laboratory in the mainland of China.
INFINAIR laboratory has successfully obtained the CNAS Laboratory Accreditation Certificate and enlisted in the Chinese National Accredited Laboratory Directory.
Laboratory Accreditation Certificate Issued by CNAS (Chinese National Accreditation Service for Conformity Assessment)
Laboratory Accreditation Certificate Issued by AMCA (Air Movement and Control Association)
All testing procedures at INFINAIR’s air performance and sound testing laboratory are done according to the following standards:
1. All design, fabrication and testing guidelines are in strict accordance with AMCA 210, AMCA 300, ISO 5807, GBT 1236, ISO 13350 and GBT 10178 standards.
2. The INFINAIR laboratory has replaced the simple cardboard shielding method duct test with a new generation of precise-flow nozzle matrix systems.
3. Advanced and sophisticated testing equipment are being used in the laboratory.
4. All equipment used in the laboratory are calibrated and inspected regularly.
5. When comparing the results of same-sample inter-lab tests, the INFINAIR lab test results’ margins of error are within the precision and error requirements specified by relevant international/national standards.
INFINAIR laboratory also has the following test capabilities:
1. perform overspeed test in accordance with JB/T6445 Overspeed test for industrial fan impeller;
2. perform vibration test in accordance with JB/T8689 Fan vibration detection and its limited value and other related standards;
3. perform thrust test for tunnel jet fans in accordance with ISO13350 Industrial fan-Performance testing of jet fans;
4. Designed in accordance with such standards as EN 12101-3 and UL 793, INFINAIR laboratory has built high-temperature furnaces for smoke removal fans for performance tests and as a witness test platform for obtaining TUV, UL and other overseas certifications.
INFINAIR laboratory can perform other tests, such as high and low temperature resistance test, water spray and splash test, physicochemical test, dust test and so on. The laboratory helps ensure precise tests for reliable product quality and accurate technical data.
INFINAIR's Numerical Simulation Technology
INFINAIR owns the industry-leading CFD technology
INFINAIR Research Institute masters a set of core CFD technology combining theory with practice owned by INFINAIR itself. Through a large number of repeated engineering applications for many years, now, INFINAIR’s CFD capability is mature and accurate. Besides, in combination with internationally accredited precision laboratories, Our CFD processes have been repeated hundreds of times to allow for comparison between theoretical values and test results, accumulating valuable test data.
CFD is an important R&D capability of INFINAIR’s Research Institute;; it is featured of high calculated result reliability and fast calculation process. By means of the all-series product utility module system, it can reduce the module development cost of new product at the same time of offering fast customization to customer, and ensure economy while realizing customization.
Successful cases of INFINAIR CFD technology:
1. INFINAIR product generally adopts CFD for systematic development and optimized design, and this is just why INFINAIR is capable of supplying more energy-saving and more efficient products with lower noise. Please see following picture of simulated aerodynamic performance process of INFINAIR complete mixed flow fan, a certain new box-type fan of INFINAIR and a certain centrifugal fan of INFINAIR.
CFD flow field pressure and rate of INFINAIR patented complete mixed flow fan (process illustration)
CFD flow field trace of a certain new box-type centrifugal fan of INFINAIR (process illustration)
CFD analysis for inducing fan of garage (process illustration)
2. With respect to garage ventilation system optimization, INFINAIR has successfully developed a new, complete series centrifugal inducing fan with high static pressure as wehll as far projection distance, and guide the ventilation system layout of underground garage of customer. The following is the flow field layout simulation of an underground garage.
INFINAIR has mature FEA technical capability
1.In the practice process of FEA technology for many years, INFINAIR has accumulated a large number of data and experience which are suitable for actual physical property of common materials in China market.
2.INFINAIR Research Institute fully calculates and repeatedly adjusts the material type, material thickness, structural form and processing way in design stage to ensure that the parts can resist various pressures in operation, ensure that the fan can operate reliably for a long time, and ensure that the product cost is reasonable.
3.The final product scheme goes through the reliability verification of INFINAIR laboratory, conducts failure analysis and life extension analysis for products suffered aging test, reaches a definite conclusion, and thus reasonably saves equipment investment while improving product reliability.
CFD flow field pressure cloud of a certain centrifugal fan of INFINAIR (process illustration)
——Numerical simulation technology CAE
1.Numerical simulation is a kind of application of Computer Aided Engineering (CAE), mainly includes two core technologies of CFD and FEA.
2.CFD is short for Computational Fluid Dynamics. CFD simulate-calculates the product performance inside computer, provides guidance for aerodynamic model design (optimize the number of blades, angles and widths) and noise prediction of fan, especially impeller, and thus helps the designer basically predict the final aerodynamic performance without producing so many prototypes, consequently realizes quick customized design or systemic optimization.
3.As a “virtual laboratory”, CFD can realize fast iteration, save cost and reduce R&D period, is a strong tool for effective and reliable fan R&D and non-standard customization, and will provide accurate scheme for optimization of ventilation system.
Process illustration of FEA stress distribution for customized centrifugal fan impeller made by INFINAIR
Successful cases of INFINAIR FEA technology:
1.The following is process illustration for a customized fan analyzed by INFINAIR Research Institute . According to the system natural vibration characteristics of the customer, INFINAIR Research Institute makes vibration mode analysis for the overall customized fan, achieves structural optimization, avoids resonating with system, and ensures that the fan can operate reliably for a long time.
Modal analysis for fan frame made by INFINAIR Research Institute through FEA
2.In order to analyze the bearing and deformation of motor platform in operating process, INFINAIR Research Institute conducts modal analysis based on FEA technology.
R&D and Innovation: R&D team
INFINAIR Research Institute focuses on “product life cycle” and is fully responsible for management of all products. The responsibilities are as follows:
1.Fundamental research of hydromechanics;
2.Market research of ventilation, gas heating, motor, air purification and automatic control of ventilation system;
3.Product planning, R&D and manufacturing;
5.Market launch and promotion, maintenance and update/obsolescence;
6.Product experiment and test, product certification;
7.Order processing and technical support.
As a new high-tech enterprise in Shanghai, INFINAIR Research Institute has an excellent technical talent team combing elder, middle-aged and young people and an effective talent cultivating mechanism. Immersing in Youth Culture of Ready to learn, Hard-working, Enterprising, Forward-looking, Innovative, Pioneering for a long time, INFINAIR R&D team has cultivated innovative spirit which has become source for core competitiveness of company.
INFINAIR Research Institute always takes Reliable, Convenient, Novel as the basic concept of product R&D and design. Under the guidance of the spirit and concept, the institute has reached innumerable great achievements, obtained more than 40 patent certificates and won many honors, it has launched many products for the first time in industry, what is more important is that INFINAIR Research Institute takes “at customers’ side” and resolving practical product issues for customer as an important work habit, and thus creates valuable and satisfactory experience, gains full trust of customer. INFINAIR Research Institute will never stop innovating.
--Much to expect from just having excellent design and a precise detail-oriented drawing? In fact, there is still a long way to go before finalizing a reliable product that comes only from high processing precision and advanced technology.
-- INFINAIR has put to use a large number of high-precision CNC processing machines. Besides, INFINAIR has produced lots of special-purpose equipment and core molds through its independent R&D efforts.
--Also, R&D staff and production workers at INFINIAR are mobilized to promote technological improvements through concerted efforts. By analyzing onsite issues and sharing the actions for improvement, product reliability has been continuously enhanced with the help of wisdom of frontline workers.
Reliability Certified by Quality Control Systems
--INFINAIR has been awarded triple certification in ISO9001, ISO14001 and OHSAS18001 by SGS, a world famous certification agency.
--INFINAIR performs tests on key points at all stages of production and products must be rigorously tested before leaving the factory to ensure reliability. A case in point: INFINAIR made huge investments in building a vibration test bench on the production line and importing dedicated test equipment from Germany for greater accuracy. This bench covers 180 square meters with its foundation reaching 20 meters underground.
--Furthermore, INFINAIR works with consulting companies to launch 5S programs and take the Six Sigma approach to the continuous improvement of products. In this way, abilities of staff can be improved and a sustainable quality management system built.
The TÜV SÜD Certificate
AMCA accredited lab
AMCA membership certificate
Numerous Product Patents
CNAS lab accreditation
ISO 9001 quality management system
OHSAS 18001, Occupational Health and Safety Assessment Series
ISO 14001 environmental management system
Fire Fighting Certification
This video is about a signature airport job of INFINAIR ventilation. We participated and competed the bidding for this ventilation project - Xinzheng Airport in 2014.
With the lack of fossil fuel and aggravation of pollution, nuclear power is the unique new power can be Large-scale applied with great prospect.
The Dongfeng Yueda KIA is an joint-venture of Dongfeng Motor Corporation、Jiangsu Yueda Investment Co. Ltd and Korean KIA Automatic Vehicle. Ltd, partly occupying respectively 25%、25%、50% of the company.