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NK-7300  Non-Welded Bellows Expansion Joint

NK-7300  Non-Welded Bellows Expansion Joint
NK-7300
Number Name Material
1 Bellows SUS304,SUS316,SUS316L
2 Flange SS400,SUS304,SUS316,SUS316L
3 Internal Cylinder SUS304,SUS316,SUS316L
4 Holder SS400,SUS304
5 Set Bolt SS400,SUS304

Features

Excellent anti-corrosion due to non-welded framework of flange
Quick plumbing due to thinness and flexibility of Bellows。
We prepare Dual-coating type for high pressure occasions.


NK-7300 Non-welded bellows type fitting stretch

Bellows life cycles than 3000 Internal pressure of 0.1 to 0.3MPa 19000kgf/mm2 modulus

Name Diameter
Dimensions in mm bellows Can be produced Number of peaks Spring constant
N/mm・peak
1 Mt per mm2 axial displacement
Thickness of Plate Bowler Pitch Internal Diameter
20 0.3 4.7 6 27 32 1017 0.45
25 0.3 5.45 6.3 33.5 32 839 0.55
32 0.3 6.7 7 42 32 592 0.75
40 0.35 6.9 7.5 47.5 32 943 0.75
50 0.35 7.4 8.5 59.5 32 913 0.9
65 0.4 9.6 9.5 75 25 849 1.2
80 0.4 10.6 10.5 88 25 734 1.4
100 0.4 12.1 10.5 113 25 668 1.6
125 0.5 11 12 138 32 1845 1.4
150 0.5 13 15 164 24 1290 1.8
200 0.5 13 15 216 24 1666 1.8
250 0.5 16 18 268 23 1122 2.7
300 0.5 18 20 317 21 934 3.5
350 0.6 18 20 356 21 1803 3
400 0.6 23 25 406 17 1002 4.7
450 0.6 23 25 456 17 1118 4.7
500 0.7 28 30 507 14 1107 5.9
550 0.7 28 30 558 14 1213 5.9
600 0.7 28 30 609 14 1318 5.9
650 0.7 32 35 660 12 949 7.8
700 0.8 32 35 710 12 1520 7
750 0.8 32 35 762 12 1626 7
800 0.8 36 40 812 9 930 8.7
850 0.8 36 40 864 9 1284 8.7
900 0.8 36 40 914 9 1929 8.7
950 0.8 40 45 962 8 1035 10.5
1000 0.8 40 45 1015 8 1090 10.5