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Metal bellow seal
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 Metal bellows seal,mechanical seals

AK-680

John crane Type 680 replacement

Product detail

 

Structure Description:
45° Angled Edge Design
Bellows inner edge welded in 45° angle maximizes pressure resistancy
 Flexible Graphite Secondary Seal
Excellent performance in high temperature application 
Double-ply Available
Double-ply is available for High-Pressure Applications
Cartridge Design Available

Operating Limits:
Temperature: -75°C~+425°C
Pressure: Vacuum~ 2 MPa
vacuum~ 3.5 MPa (double ply)
Speed: ≤ 5000 rpm or 25 m/s
Material:
Bellows: AM350
End-Fittings: 4J42 ,SS316L
Insert/Primary Ring: Premium Carbon Grade; Tungsten Carbide, Silicon Carbide;
Static Seals: Fluorocarbon, EPR, PTFE- Encapsulated Fluorocarbon, Nitrile, Perfluoroelastomer

 

   AK-680 Dimentions(mm)
A B C
18 32.0 27.5
20 33.3 27.5
22 36.0 27.5
24 38.1 30.0
25 39.0 30.0
28 42.0 32.5
30 44.0 32.5
32 46.0 32.5
33 47.0 32.5
35 49.2 32.5
38 52.4 34.0
40 55.6 34.0
43 58.7 34.0
45 58.7 34.0
48 61.9 34.0
50 65.1 34.5
53 68.3 34.5
55 71.0 34.5
60 74.6 39.5
65 84.1 39.5
70 87.3 45.0
75 95.3 45.0
80 98.4 44.5
85 104.8 44.5
90 108.0 49.5
95 114.3 49.5
100 120.7 49.5
105 131.7 48.3
110 138.1 48.3
115 144.5 48.3
 
AK-680 Dimentions(mm)
A B C
0.750  1.312 1.250
0.875  1.437 1.250
0.937  1.500 1.250
1.000 1.562 1.250
1.125 1.687 1.250
1.250 1.812 1.312
1.375 1.937 1.437
1.500 2.062 1.437
1.625 2.187 1.437
1.750 2.312 1.437
1.875 2.437 1.500
2.000 2.562 1.500
2.125 2.687 1.500
2.250 2.812 1.562
2.375 2.937 1.562
2.500 3.187 1.562
2.625 3.312 1.625
2.750 3.437 1.625
2.875 3.625 1.687
3.000 3.750 1.687
3.125 3.875 1.750
3.250 4.000 1.750
3.375 4.125 1.750
3.500 4.250 1.875
3.625 4.375 1.875
3.750 4.500 1.875
3.875 4.625 1.875
4.000 4.750 1.875
4.250 5.187 1.903
4.500 5.438 1.903
4.750 5.688 1.903
5.000 5.938 1.903
5.250 6.213 1.903
 

 

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