VDF-25C Welded Concentric Butterfly Valve
For ventilation, flue gas and dust collection duties.
About JNS
A welded butterfly valve manufacturer based in Wenzhou, China
Wenzhou Jinnaisi Valve Co., Ltd. (JNS) is based in Longwan District, Wenzhou, Zhejiang. Our valve machining experience began in 1990 and the company completed its business registration in 2001.
JNS focuses on welded butterfly valve machining and fabrication for industrial ventilation, flue gas, gas handling and marine ventilation duties, with OEM supply and drawing-based support for non-standard projects.
- Operating-condition Review
- Drawing-based Project Review
- OEM & Custom Fabrication
- Tight-tolerance Machining
What does JNS do?
JNS is committed to welded butterfly valve manufacturing, including:
- VDF-25C — Welded Concentric Ventilation Butterfly Valve
- VDF-25D — Double Offset High-Performance Welded Butterfly Valve
- VDF-25T — Triple Offset Precision Welded Butterfly Valve
- VDF-25B — Central Airtight Valve
- VDF-25CS — Custom Welded Butterfly Valve
Every valve starts from the submitted operating conditions and drawings. Dimensions, connections, materials, sealing and actuation interfaces are reviewed project by project before production.
VDF-25C Welded Concentric Butterfly Valve
For ventilation, flue gas and dust collection duties.
VDF-25D Double Offset Butterfly Valve
For frequent cycling and automated control.
VDF-25T Triple Offset Butterfly Valve
For tight shutoff in elevated-temperature or abrasive service.
VDF-25B Central Airtight Valve
For marine ventilation and compartment isolation.
VDF-25CS Custom Welded Valve
A drawing-based program for non-standard projects.
Custom Solutions
From operating conditions to confirmed project drawings.
JNS team
What can you expect from JNS?
From the first drawing review to packaging and delivery, our team keeps every project aligned with the confirmed technical requirements. Whether your application is ventilation, energy, chemical processing or marine, we manufacture to the agreed project documents.
- Project-configured valves instead of one-size-fits-all catalogues
- Faster confirmation through drawing-based engineering review
- Flexible options for dimensions, materials, sealing and actuation
- OEM supply and support for non-standard project requirements
View our factory and facilities
Arrange a Factory VisitOur workshop in Longwan District, Wenzhou is equipped for turning, welding, machining and assembly of welded butterfly valves. Incoming materials are checked against project requirements, and finished valves are inspected before packing and shipment.
