Mechanical Seal TB688 replace John Crane 609
Mechanical Seal TB688 replace John Crane 609
Mechanical Seal TB688 replace John Crane 609
Mechanical Seal TB688 replace John Crane 609
Mechanical Seal TB688 replace John Crane 609

Mechanical Seal TB688 replace John Crane 609

Model
TB688

Item specifics

Temperature
-75℃-370℃
Speed
≦23m/s
Pressure
≦2.1MPA
Stationary Seat
TBG9
Rotary Ring Material
CAR/SIC/TC
Stationary Ring Material
CER/SIC/TC
O-Ring Material
Encasulated Ring, Expanded Graphite
Spring & Metal Parts
SUS304/SUS316
Application
Clean Water，Sewage Water，Oil

Review

Description

Product Introduction 
Product Size
Product Details
Product Model
Mechanical seal TB688 
Replacement to:
John Crane 609

Operational Conditions:
Temperature: -75℃ to +370℃
Pressure: ≤2.1MPa
Speed: ≤23m/s

Materials:
Stationary Ring: Silicon Carbide, TC, Cer
Rotary Ring: Silicon Carbide, Car, TC
Secondary Seal: Expanded Graphite, Encasulated Ring
Spring and Metal Parts: SUS304,SUS316 
Applications:
Clean water,
sewage water
oil and other moderately corrosive fluids
Stationary Seat:
Standard: TBG9
Alternative:
Product details
SIZE
Size/
Metric
d
D3
L1
25.40
25.40
41.28
38.95
28.58
28.58
44.45
39.87
31.75
31.75
47.63
40.66
34.93
34.93
50.80
40.66
38.10
38.10
53.98
40.66
41.28
41.28
57.15
40.66
44.45
44.45
60.33
41.48
47.63
47.63
63.50
41.48
50.80
50.80
66.68
42.26
53.98
53.98
69.85
42.26
57.15
57.15
73.03
43.86
60.33
60.33
76.20
43.86
63.50
63.50
82.55
44.65
66.68
66.68
85.73
45.44
69.85
69.85
88.90
45.44
73.03
73.03
93.65
47.83
76.20
76.20
96.82
47.83
79.38
79.38
101.60
47.83
82.55
82.55
104.78
47.83
85.73
85.73
107.95
47.83
88.90
88.90
111.13
47.83
92.08
92.08
114.30
47.83
95.25
95.25
117.48
47.83
98.43
98.43
120.65
47.83
101.60
101.60
123.83
47.83

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