Expansion Joints, Japan, NFK, Pipe
NK-7500, NK-7700 Expansion Joints (Outer-Cylinder Type)
Product Made in Japan
Model: NK-7500, NK-7700
NFK expansion joints are used in gas and liquid transport system lines used by steel making, chemical and industrial plants to transport substances such as air, water, gases, steam, oil and exhaust gases. They can compensate for expansion and contraction caused by temperature differences in air-conditioning/sanitation lines in buildings and other structures. They also handle conditions such as line center misalignment, vibrations, foundation subsidence and earthquakes.
Feature
This product wraps a bellows in an inner cylinder and an outer cylinder, and has a structure that does not carry out compression buckling that if it’s big axial move.
NK-7500 is Single bellows
NK-7700 is Double bellows
Applicable fluid: Steam, Exhaust gas, Water, Air
Applicable bellows: MF, HF
Material: SUS304, SUS316L,
*Please contact us for material.
Standard: JIS, ANSI, DIN
Specification
Drawing
NK-7500
NK-7700
Materials
| ① Bellows | Stainless Steel |
|---|---|
| ② Inner Sleeve | Stainless Steel |
| ③ Outer Cylinder | Carbon steel, Stainless Steel |
| ④ End Pipe | Carbon steel, Stainless Steel |
| ⑤ Flange | Carbon steel, Stainless Steel |
| ⑥ Neck Ring | Carbon steel, Stainless Steel |
| ⑦ Middle Ring | Carbon steel, Stainless Steel |
| ⑧ Tie Rod | Carbon steel, Stainless Steel |
| ⑨ Holder | Carbon steel, Stainless Steel |
Specification table
X = Axial Movement
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