Mechanical Seal TB491 Replace Burgmann and John Crane
Mechanical Seal TB491 Replace Burgmann and John Crane
Mechanical Seal TB491 Replace Burgmann and John Crane
Mechanical Seal TB491 Replace Burgmann and John Crane
Mechanical Seal TB491 Replace Burgmann and John Crane

Mechanical Seal TB491 Replace Burgmann and John Crane

Model
TB491

Item specifics

Temperature
-20℃-180℃
Speed
≦15m/s
Pressure
≦2.5MPA
Rotary Ring Material
CAR/SIC/TC
Stationary Ring Material
CER/SIC/TC
O-Ring Material
VIT/NBR/EPDM
Spring & Metal Parts
SUS304/SUS316
Application
Clean Water，Sewage Water，Oil

Review

Description

Product Introduction 
Product Size
Product Details
Product Model
TB491 mechanical seal
Replace Burgmann and John Crane
Operational Conditions:
Temperature：-20℃ to +180℃
Pressure： ≤2.5MPa
Speed： ≤15m/s

Materials:
Stationary Ring: Silicon Carbide, TC, Carbon
Rotary Ring: Silicon Carbide, Ceramic, TC
Secondary Seal: NBR, EPDM, Viton
Spring and Metal Parts: SUS304,SUS316 
Applications:
Clean water,
sewage water
oil and other moderately corrosive fluids
Stationary Seat:
Standard:
Alternative: 
Product details
SIZE
Size/
Metric
d
D1
D2
D3
L1
L2
18
18
33
27
32.28
30
7.5
20
20
35
29
34.29
30
7.5
22
22
37
31
36.30
30
7.5
24
24
39
33
38.30
30
7.5
25
25
40
34
39.29
30
7.5
28
28
43
37
42.29
35
7.5
30
30
45
39
44.30
35
7.5
32
32
48
42
46.30
35
7.5
33
33
48
42
47.90
35
7.5
35
35
50
44
49.48
35
7.5
38
38
56
49
54.28
35
9
40
40
58
51
56.08
35
9
43
43
61
54
59.08
35
9
45
45
63
56
61.09
35
9
48
48
66
59
64.11
35
9
50
50
70
62
66.09
35
9.5
53
53
73
65
71.00
35
11
55
55
75
67
71.07
35
11
60
60
80
72
77.14
35
11
65
65
85
77
83.01
35
11
68
68
90
81
91.00
35
11.3
70
70
92
83
86.08
35
11.3
75
75
97
88
98.43
48
11.3
80
80
105
95
104.79
48
12
85
85
110
100
107.95
48
12
90
90
115
105
114.30
48
14
100
100
125
115
123.83
48
14

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