bj920n standard mechanical seals · pusher...
TRANSCRIPT
Product Description1. Balanced2. Encapsulated rotating spring3. For shafts without a step4. Independent of direction of rotation5. Single seal
Technical Features1. Especially designed for medias with solids and highly viscosity2. No damage of the shaft by dynamically loaded O-Ring3. Rugged and reliable design4. Springs are protected from the product5. Versatile applications including sterile & vacuum
Standard Mechanical Seals · Pusher SealsBJ920N
Conveying and bottling of dairy productsDirty, abrasive and solids containing mediaPulp and paper industrySugar industryWater and waste water technologyRaw sludge pumpsRaw sludge, sewage slurriesThick juice pumps
Typical Industrial Applications
Item Part no. Description
DIN 24250
1.1
1.2
1.3
1.4
1.5
1.6
2
3
472/473
485
412.2
412.1
477
904
475
412.3
Seal face
Drive collar
O-Ring
O-Ring
Spring
Set screw
Seat (G16)
O-Ring
Sizes: d1 = Upto 100 mm (Upto 4.000’’)Pressure: p1*) = 0.8 abs... 25 bar (12 abs.... 363 PSI)Temperature: t = -50 °C...+220 °C (-58 °F...+430 °F)Speed = 20 m/s (66 ft/s)Permissible axial movement: ±0.5 mm
Performance Capabilities
Materials
Seal face: Carbon graphite antimony impregnated (A),Carbon graphite resin impregnated (B)Seat G16: Silicon carbide (Q1)
Standards
EN 12756
Notes
Variant for sterile applications available.Please enquire.
l3
l1k
l19
l7 +O,5
f
d 3 d m
d 1 h6
d 6 H1
1
d 7 H8
1.6 1.4 1.5 1.1 2 3
1.2 1.3l18
mx
l5 l6 5
d8
O20
37
Design Variations
l38
l11
l3 l39
l1k
l13 l39
l381.6 1.4 1.1 2 3
1.2 1.3 1.5
BJ927GNItems and description as BJ920N.Seal face: Carbon graphite antimony impregnated (A),Carbon graphite resin impregnated (B)Seat G46: Silicon carbide (Q12)Installations length l (= l + l ) is longer than l .11 3 39 1k
BJ970GN5Items and description as BJ920N.Seal face: Silicon carbide (Q12)Seat G16: Silicon carbide (Q1)
Installations length l (= l + l ) 12 13 19
is shorter than l .1k
BJ977GNItems and description as BJ920N.Seal face: Silicon carbide (Q12)Seat G46: Silicon carbide (Q12)Installation length l1k
Operating range:Temperature: t = –20 °C ... +180 °C (-4 °F ... +356 °F)Sliding velocity: Vg = 10 m/s (33 ft/s)
Dimensional Data
inch size available from size 0.750 to 4.000Note: Additional technical & dimensional information will be provided on request.
d1 d3 d6 d7 d8 dm l1K l3 l5 l6 l7 l18 l19 l 111) l12
2) l13 l38 l39 f mx
18
20
22
24
25
28
30
32
33
35
38
40
43
45
48
50
53
55
58
60
63
65
68
70
75
80
85
90
95
100
32
34
36
38
39
42
44
47
47
49
54
56
59
61
64
66
69
71
78
80
83
85
88
90
99
104
109
114
119
124
27
29
31
33
34
37
39
42
42
44
49
51
54
56
59
62
65
67
70
72
75
77
81
83
88
95
100
105
110
115
33
35
37
39
40
43
45
48
48
50
56
58
61
63
66
70
73
75
78
80
83
85
90
92
97
105
110
115
120
125
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
26.0
28.0
30.0
32.5
33.5
36.5
38.5
41.5
41.5
43.5
47.5
49.5
52.5
54.5
57.5
59.5
62.5
64.5
68.5
70.5
73.5
75.5
78.5
80.5
89.0
94.0
99.0
104.0
109.0
114.0
37.5
37.5
37.5
40.0
40.0
42.5
42.5
42.5
42.5
42.5
45.0
45.0
45.0
45.0
45.0
47.5
47.5
47.5
52.5
52.5
52.5
52.5
52.5
60.0
60.0
60.0
60.0
65.0
65.0
65.0
30.5
30.5
30.5
33.0
33.0
35.5
35.5
35.5
35.5
35.5
37.0
37.0
37.0
37.0
37.0
38.0
38.0
38.0
42.0
42.0
42.0
42.0
41.5
48.5
48.5
48.5
48.5
52.0
52.0
52.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
3.0
3.0
3.0
3.0
5
5
5
5
5
5
5
5
5
5
6
6
6
6
6
6
6
6
6
6
6
6
7
7
7
7
7
7
7
7
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
15.0
16.0
16.0
16.0
16.0
16.0
17.0
17.0
17.0
18.0
18.0
18.0
18.0
18.5
19.0
19.0
19.0
19.0
20.5
20.5
20.5
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
8.0
8.0
8.0
8.0
8.0
9.5
9.5
9.5
10.5
10.5
10.5
10.5
11.0
11.5
11.5
11.5
11.5
13.0
13.0
13.0
39.5
39.5
39.5
42.0
42.0
45.0
45.0
45.0
45.0
45.0
47.5
47.5
47.5
47.5
47.5
50.0
50.0
50.0
55.0
55.0
55.0
55.0
55.0
62.5
62.5
62.5
62.5
67.5
67.5
67.5
35.5
35.5
35.5
38.0
38.0
40.0
40.0
40.0
40.0
40.0
42.5
42.5
42.5
42.5
42.5
45.0
45.0
45.0
50.0
50.0
50.0
50.0
50.0
57.5
57.5
57.5
57.5
62.5
62.5
62.5
28.5
28.5
28.5
31.0
31.0
33.0
33.0
33.0
33.0
33.0
34.5
34.5
34.5
34.5
34.5
35.5
35.5
35.5
39.5
39.5
39.5
39.5
39.0
46.0
46.0
46.0
46.0
49.5
49.5
49.5
17.0
17.0
17.0
17.0
17.0
17.5
17.5
17.5
17.5
17.5
18.5
18.5
18.5
18.5
18.5
19.5
19.5
19.5
20.5
20.5
20.5
20.5
21.0
21.5
21.5
21.5
21.5
23.0
23.0
23.0
9.0
9.0
9.0
9.0
9.0
9.5
9.5
9.5
9.5
9.5
10.5
10.5
10.5
10.5
10.5
12.0
12.0
12.0
13.0
13.0
13.0
13.0
13.5
14.0
14.0
14.0
14.0
15.5
15.5
15.5
3.0
3.0
3.0
3.5
3.5
3.5
3.5
3.5
3.5
3.5
4.0
4.0
4.0
4.0
4.0
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
5.0
5.5
5.5
5.5
5.5
5.5
5.5
M4
M4
M4
M5
M5
M5
M5
M5
M5
M5
M5
M5
M5
M5
M5
M6
M6
M6
M6
M6
M6
M6
M6
M6
M8
M8
M8
M8
M8
M8
38
Dimensions in millimeter
BJ400Mechanical seals with product-protected multiplesprings, for high pressure applications.Pressure: p = max. 50 bar (725 PSI)Shaft diameter: d1 > Upto 100 mm (Upto 4.000’’).Smaller diameters and higher pressures on request.