Answers to the questions buyers ask most before ordering external rotor fans. For project-specific details, ask our engineers — we respond within 24 hours.
What certifications do your fans have?
Our products have passed CE, RoHS, CCC, ETL and UL certifications. Products are exported to Europe, the Americas, Southeast Asia and the Middle East.
What fan series do you manufacture?
We manufacture EC backward-curved centrifugal fans, B-series and F-series backward-curved centrifugal fans, EC axial fans, forward-curved dual-inlet centrifugal fans, box-type single-inlet fans, and FBD/FBE explosion-proof axial fans — covering impeller diameters from 63 mm to 630 mm.
Do you support OEM and custom specifications?
Yes. We offer full OEM customization including custom voltage, speed, connectors and packaging. Our factory performs EC stator production, CNC machining, press-fitting, assembly and performance testing in-house.
Are you a manufacturer or a trading company?
We are a manufacturer — Shanghai Senyin Electrical Co., Ltd. — with in-house motor winding, EC stator production, CNC machining, assembly and testing. We sell factory-direct with no middlemen.
What is your minimum order quantity (MOQ)?
MOQ depends on the model and specification. Contact us with your target model and quantity for a precise answer.
What is your lead time?
Lead time varies by model and order size. Contact us with your requirements and we will confirm a delivery schedule for your project.
Can you provide samples before bulk order?
Sample availability and terms depend on the model. Send us your requirement and our sales team will confirm sample options.
How do I choose the right fan for my application?
Start with your duty point: required airflow, static pressure, available voltage and space constraints. See our Fan Applications page, or send your parameters to our engineers for a tailored recommendation.
Still have questions? Contact us — our engineers will get back to you within 24 hours.