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Check valves are also known as backflow valves, backstop valves, back pressure valves and check valves. These valves are automatically opened and closed by the force generated by the flow of the medium itself in the pipeline; it is an automatic valve. Check valves are used in piping systems, and their main role is to prevent backflow of media to prevent the pump and its driving motor reversal, as well as the release of media in the container. Single-valve rotary check valve, the closing member of the valve flap around the valve seat outside the pin rotation, you can realize the opening and closing process of the valve.

Swing Check Valve

Gate Valve

Plug Valve

High Performance Worm gear transmission Fluorine lined ball Valve

Diaphragm Valve

Fluorine Lined Flange Butterfly Valve

Fluorine Lined Wafer Butterfly Valve

Fluorine Lined Regulating Valve

High Performance V-Type Control Ball Valve

D341F46-16C DN700 butterfly valve – NaiFuLong

Steel pipe flange dual-torch protected welding-NaiFuLong

DN200 PN10 PTFE-Lined Three-Way Ball Valve – Naifulong

X-Ray Inspection – NaiFuLong

D641F4-16C DN400–DN600 Pneumatic Butterfly Valve – NaFuLong

DN300 PN16 Blue Type Filter – NaiFuLong

DN200 Regulating Valve – NaiFuLong

Pneumatic Lined Ball Valve – Naifulon

Pneumatic Stainless Steel Fluorine-Lined Ball Valve - Naifulon

DN25 Pneumatic Fluorine-Lined Ball Valve - Naifulon

Intelligent Inspection Line-NaiFuLong

Low temperature detection - NaiFuLong

Fluorine lined elbow - NaiFuLong

Fluorine-lined Negative Pressure Compensator - NaiFuLong

Fluorine Lined Compensator for Vacuum Used

NaiFuLong-Fluorine-lined pipe-NaiFuLong Group Co., Ltd.

NaiFuLong Group

API607

Certificate

Qualifications

Collaborative innovation and co-building benchmarks - NFL VALVE GROUP fully promotes the upgrade of fluoroplastic valve standards

2025-04-26

As a core drafting unit of the national standard "General Technical Conditions for Fluoroplastic Lined Valves" (HG/T 3704), Naifulong Group leverages its technical strengths and practical experience to lead the standard's upgrade and drive high-quality development in the fluoroplastic lined valve industry.

New Product Express | NFL-The high-temperature resistant full-vacuum fluorine-lined reaction kettle has been successfully developed and smoothly delivered.

2025-04-26

NFL's successful development and delivery of its self-developed ultra-clean, high-temperature-resistant, fully-vacuum fluorine-lined reactor marks a major breakthrough in high-end chemical equipment, elevating its solutions for food-grade phosphoric acid concentration and reinforcing its leadership in advanced, safe, and adaptive industrial technologies.