JC680
-
Replacement of John Crane 680 type
Installation drawing and sizes of JC680.pdf
Suggested Operation Limits
Temperature:-20℃-220℃
Speed:≦20M/S
Pressure:≦2.0Mpa
Size:18-100mm
Combined Material
Rotary Face:Carbon/SIC/TC
Stat Ring:SIC/TC
Seat Type:Standard AS-ORSA,Alternative AS-ROSE/S09
This seal can replace with Johncrane type 680.
Bellows Design Features:
1,Optimum 45° tilt angle
2,Three-sweep radius
3,Static secondary seal
4,Light spring loads
Welded Metal Bellows Bellows Advantages:
1,Uniform plate rigidity and stress distribution
2,Enhanced fatigue strength
3,Pressure-balanced by design
4,Less heat generated
5,Lower power consumption
Applications:
1,Aqueous solutions
2,Chemicals
3,Hydrocarbons A
4,Slurry
5,Thermo-sensitive fluids
6,Water
Our 680 is the seal for general-purpose applications.
Also good for low-temperature applications found in the chemical, water and waste water, pulp and paper, and utility industries. The seal is available with hard faces for abrasive applications and a wide range of elastomers to cover a broad range of applications.
Installation size and drawing of 680 type for John Crane
d(metric)
D3
L1
d(inch)
d(meric)
D3
L1
18
32
27.5
0.750
19.050
33.32
31.75
20
33.3
27.5
0.875
22.230
36.50
31.75
22
36
27.5
0.937
23.800
38.10
31.75
24
38.1
30
1.000
25.400
39.67
31.75
25
39
30
1.125
28.580
42.85
31.75
28
42
32.5
1.250
31.750
46.02
33.32
30
44
32.5
1.375
34.930
49.20
36.50
32
46
32.5
1.500
38.100
52.37
36.50
33
47
32.5
1.625
41.280
55.55
36.50
35
49.2
32.5
1.750
44.450
58.72
36.50
38
52.4
34
1.875
47.630
61.90
38.10
40
55.6
34
2.000
50.800
65.07
38.10
43
58.7
34
2.125
53.980
68.25
38.10
45
58.7
34
2.250
57.150
71.42
39.67
48
61.9
34
2.375
60.330
74.60
39.67
50
65.1
34.5
2.500
63.500
80.95
39.67
53
68.3
34.5
2.625
66.680
84.12
41.28
55
71
34.5
2.750
69.850
87.30
41.28
60
74.6
39.5
2.875
73.030
92.08
42.85
65
84.1
39.5
3.000
76.200
95.25
42.85
70
87.3
45
3.125
79.380
98.43
44.45
75
95.3
45
3.250
82.550
101.60
44.45
80
98.4
44.5
3.375
85.730
140.78
44.45
85
104.8
44.5
3.500
88.900
107.95
47.63
90
108
49.5
3.625
92.080
111.13
47.63
95
114.3
49.5
3.750
95.250
114.30
47.63
100
120.7
49.5
3.875
98.430
117.48
47.63
4.000
101.600
120.65
47.63
