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NFK NK-6500・NK-6600・NK-6700 Expansion Joints (General-Purpose Type)

Product Made in Japan
Manufacturer: NFK
Model: NK-6500, NK-6600, NK-6700

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 welds a pipe to a bellows.
Applicable fluid: Exhaust gas Air Low pressure steam Water
Applicable bellows: MF,iO
Material: SUS304 SUS316L SUS310S
*Please contact us for material.
Standard: JIS, ANSI, DIN

Specification

Drawing

NK-6500

Materials

① Bellows Stainless Steel
② End Pipe Carbon steel, Stainless Steel
③ Inner Sleeve Stainless Steel
④ Flange Carbon steel, Stainless Steel
⑤ Holder Carbon steel, Stainless Steel
⑥ Shipping Bolt Carbon steel, Stainless Steel

NK-6600

Materials

① Bellows Stainless Steel
② End Pipe Carbon steel, Stainless Steel
③ Inner Sleeve Stainless Steel
④ Flange Carbon steel, Stainless Steel

NK-6700

Materials

① Bellows Stainless Steel
② End Pipe Carbon steel, Stainless Steel
③ Inner Sleeve Stainless Steel

Specification table

X = Axial Movement

DN Length(mm) Resisting
pressure
X=10 X=15 X=20 X=25 X=30 Mpa
50 230 290 350 1.0
65 175 220 250 300 330 0.5
80 200 250 310 360 400 0.9
90 200 250 310 360 400 0.9
100 200 260 300 360 400 0.8
125 220 250 280 340 370 0.5
150 220 250 280 340 370 0.5
175 220 250 280 340 370 0.5
200 220 250 280 340 370 0.5
250 220 250 280 340 370 0.5
300 240 270 300 360 390 0.5
350 230 270 310 350 390 0.45
400 230 270 310 350 390 0.45
450 230 270 310 350 390
500 250 300 350
550 250 300 350
600 250 300 350

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