en
Русский [ru]
Mechanical seals with springs in metal case
- Description
-
153 / 153D dual mechanical seal in metal case for chemical pumps by OST 26-06
Mechanical seals for chemical pumps of X, XM, and AX types.
Single and double versions.
Secondary PTFE seals ensure high cehmical resistance.
Made as per OST26-06-1493-87.
Analog:
Hermetica 153, 153D
Friction couple materials:
carbographite (Рђ, Р’)
special chrome molybdenum steel (Р•)
tungsten carbide (U3)
silicon carbide (Q1, Q2)
ceramics Al203 (V)
Secondary seals:
fluorine rubber, FKM (V)
nitrile rubber (Р )
ethylene propylene rubber, EPDM (Р•)
fluoroplastic, PTFE
Parameters:
СЂ = 16 (25) bars
t = -50 ... 220°С
v = 20 m/s
d
D3
D6
D7
L1
L2
L3
33
47
42
48
42,5
76
55
40
56
51
58
45
84
55
48
64
59
66
45
86
60
55
71
67
75
47,5
89
70
60
80
72
80
52,5
100
70
70
90
83
92
60
100
80
75
99
88
97
60
100
80
Do not require any adaptation of the pump.
To order seals, it is sufficient to know the pump grade or the manufacturer's seal number.
- Name
- 153 / 153D Dual mechanical seal in metal case for chemical pumps
- Description
-
DIN 24960
Disadvantages of the central spring design: uneven load distribution along the friction belt in the couple due to the non-perpendicularity of the spring ends in relation to its axis, resulting in the couple being subject to unilateral wear, a comparatively large size of the spring in the axial direction and its inefficiency for large-sized shafts.
Mechanical seals with a set of small cylindrical springs have a smaller axial size than central spring seals and have no limitations as to the shaft diameter. By using a set of small springs, it is possible to increase unification of the Mechanical seal design: one and the same spring can be used for sealing different diameters. The sealing force can be adjusted by changing the number of springs and keeping constant the axial movement of the rigid element. The seal design ensures its low-cost maintenance due to easily replaceable parts. This kind of seal is often used in pumps at refineries, petrochemical plants and in the process industry. The secondary seal on the axis is completed by means of an O-ring or PTFE ring wedgewise.
The disadvantage of this kind of rigid elements is the small diameter (1 mm) of the spring wire, which makes its application in corrosive media limited.
The rigid element design based on a set of small springs is not recommended for use in media with solid inclusions.
The springs are quickly clogged with solid inclusions, which causes the rigid element to lose its axial movement ability.The more compact version allows it to be used in pumps for heating, in sludge and fecal pumps, as well as in food industry pumps.
Analog:
AESSEAL M03 / M03S, Burgmann BT-C56.KU / BT-C5.KU / M74N, John Crane 59U / 58U, Vulcan 1659 / 1659S, Sterling 259 / 259S, Type 153 / 251 by OST
Materials for sealing faces:
carbographite
chromium steel
nickel chrome steel
increased rigidity nickel chrome steel
tungsten carbide
silicon carbide
ceramics (AI2O3)
Operating limits:
p = 16 bars
t = -40 ... 220В°C
v = 20 m/s
NV-1.1 carbographite pressed into the sealing surface frame
NV-1.2 silicon carbide pressed into the sealing surface frame
NV-1.3 seal surface with tungsten carbide soldered on
d1
d3
D4
D6
D7
D8
l3
l4
l1k
18
32
34
27
33
3
26
11.5
37.5
20
34
36
29
35
3
26
11.5
37.5
22
36
38
31
37
3
26
11.5
37.5
24
38
40
33
39
3
28.5
11.5
40
25
39
41
34
40
3
28.5
11.5
40
28
42
44
37
43
3
31
11.5
42.5
30
44
46
39
45
3
31
11.5
42.5
32
46
48
42
48
3
31
11.5
42.5
33
47
49
42
48
3
31
11.5
42.5
35
49
51
44
50
3
31
11.5
42.5
38
54
58
49
56
4
31
14
45
40
56
60
51
58
4
31
14
45
43
59
63
54
61
4
31
14
45
45
61
65
56
63
4
31
14
45
48
64
68
59
66
4
31
14
45
50
66
70
62
70
4
32.5
15
47.5
53
69
73
65
73
4
32.5
15
47.5
55
71
75
67
75
4
32.5
15
47.5
58
78
83
70
78
4
37.5
15
52.5
60
80
85
72
80
4
37.5
15
52.5
63
83
88
75
83
4
37.5
15
52.5
65
85
90
77
85
4
37.5
15
52.5
68
88
93
81
90
4
37.5
15
52.5
70
90
95
83
92
4
43
17
60
75
99
104
88
97
4
43
17
60
80
104
109
95
105
4
43
17
60
85
109
114
100
110
4
43
17
60
90
114
119
105
115
4
48
17
65
95
119
124
110
120
4
48
17
65
100
124
129
115
125
4
48
17
65
+ customized seals as per your drawings and specifications
- Name
- NV-1 Mechanical seal with set of small springs
- Description
-
DIN 24960
The mechanical seal with a spring in a metal case is recommended for sealing liquids containing solid substances or badly contaminated liquids, such as fuel oil. In such cases, it is not recommended to use multi-spring seals due to the risk of spring adhesion and jamming.
The secondary seal is completed by means of an O-ring.
The seal design ensures its low-cost repair, as its parts are easily replaceable.
A hydraulically relieved vesrion of the seal with one spring in a metal frame is available.
Analog:
Burgmann M78N
Materials for sealing faces:
carbographite
chromium steel
nickel chrome steel
increased rigidity nickel chrome steel
tungsten carbide
silicon carbide
ceramics (AI2O3)
Operating limits:
p = 16 bars
t = -40 ... 220В°C
v = 20 m/s
NV-2.1 carbographite pressed into the sealing surface frame
NV-2.2 silicon carbide pressed into the sealing surface frame
NV-2.3 seal surface with tungsten carbide soldered on
d1
d3
D4
D6
D7
D8
l3
l4
|1k
18
32
34
27
33
3
26
11.5
37.5
20
34
36
29
35
3
26
11.5
37.5
22
36
38
31
37
3
26
11.5
37.5
24
38
40
33
39
3
28.5
11.5
40
25
39
41
34
40
3
28.5
11.5
40
28
42
44
37
43
3
31
11.5
42.5
30
44
46
39
45
3
31
11.5
42.5
32
46
48
42
48
3
31
11.5
42.5
33
47
49
42
48
3
31
11.5
42.5
35
49
51
44
50
3
31
11.5
42.5
38
54
58
49
56
4
31
14
45
40
56
60
51
58
4
31
14
45
43
59
63
54
61
4
31
14
45
45
61
65
56
63
4
31
14
45
48
64
68
59
66
4
31
14
45
50
66
70
62
70
4
32.5
15
47.5
53
69
73
65
73
4
32.5
15
47.5
55
71
75
67
75
4
32.5
15
47.5
58
78
83
70
78
4
37.5
15
52.5
60
80
85
72
80
4
37.5
15
52.5
63
83
88
75
83
4
37.5
15
52.5
65
85
90
77
85
4
37.5
15
52.5
68
88
93
81
90
4
37.5
15
52.5
70
90
95
83
92
4
43
17
60
75
99
104
88
97
4
43
17
60
80
104
109
95
105
4
43
17
60
85
109
114
100
110
4
43
17
60
90
114
119
105
115
4
48
17
65
95
119
124
110
120
4
48
17
65
100
124
129
115
125
4
48
17
65
+ customized seals as per your drawings and specifications
- Name
- NV-2 Mechanical seal with spring in metal case
- Description
-
DIN 24960
Seals with a corrugated spring are specifically recommended for use at thermal power stations. Apart from the fact that no cases of spring blocking have been observed, an additional advatnage is that it is possible to produce such seals with a smaller diameter, if necessary, but with the same spring pressure. Besides, the spring design envisages special metal frames, in which the springs are inserted, and the seal can be used whichever the direction of shaft rotation is.
A relieved version of the seal with one corrugated spring is available.
Analog:
AESSEAL W07D / W07DM, Burgmann M7N, Vulcan 1677, Sterling 270, Flowserve Europac 600, KSB
Materials for sealing faces:
carbographite
chromium steel
nickel chrome steel
increased rigidity nickel chrome steel
tungsten carbide
silicon carbide
ceramics (AI2O3)
Operating limits:
p = 16 bars
t = -40 ... 220В°C
v = 20 m/s
NV-3.1 carbographite pressed into the sealing surface frame
NV-3.2 silicon carbide pressed into the sealing surface frame
NV-3.3 seal surface with tungsten carbide soldered on
d1
d3
D4
D6
D7
D8
l3
l4
I1k
18
32
34
27
33
3
26
11.5
37.5
20
34
36
29
35
3
26
11.5
37.5
22
36
38
31
37
3
26
11.5
37.5
24
38
40
33
39
3
28.5
11.5
40
25
39
41
34
40
3
28.5
11.5
40
28
42
44
37
43
3
31
11.5
42.5
30
44
46
39
45
3
31
11.5
42.5
32
46
48
42
48
3
31
11.5
42.5
33
47
49
42
48
3
31
11.5
42.5
35
49
51
44
50
3
31
11.5
42.5
38
54
58
49
56
4
31
14
45
40
56
60
51
58
4
31
14
45
43
59
63
54
61
4
31
14
45
45
61
65
56
63
4
31
14
45
48
64
68
59
66
4
31
14
45
50
66
70
62
70
4
32.5
15
47.5
53
69
73
65
73
4
32.5
15
47.5
55
71
75
67
75
4
32.5
15
47.5
58
78
83
70
78
4
37.5
15
52.5
60
80
85
72
80
4
37.5
15
52.5
63
83
88
75
83
4
37.5
15
52.5
65
85
90
77
85
4
37.5
15
52.5
68
88
93
81
90
4
37.5
15
52.5
70
90
95
83
92
4
43
17
60
75
99
104
88
97
4
43
17
60
80
104
109
95
105
4
43
17
60
85
109
114
100
110
4
43
17
60
90
114
119
105
115
4
48
17
65
95
119
124
110
120
4
48
17
65
100
124
129
115
125
4
48
17
65
+ customized seals as per your drawings and specifications
- Name
- NV-3 Mechanical seal with wavy spring
- Description
-
DIN 24960
Analog:
Sterling GNZ, Burgmann HJ92N / HJ97N
Friction couple materials:
Carbographite (Рђ, Р’)
tungsten carbide (РёР·)
silicon carbide (Qi, Q2)
ceramics Al203 (V)
Secondary seals:
fluorine rubber, FKM (V)
nitrile rubber (Р )
ethylene-propylene rubber, EPDM (Р•)
EFKM, FFKM(for example KalrezВ®)
fluorine rubber in PTFE shell, FEP
Parameters:
СЂ = 40 bars
t = -50 ... 220°С
v = 20m/s
Designed with a central protected spring
The location of the spring prevents any contact with the fluid being pumped
Ideal for viscous media, liquids containing abrasive particles and so on,
If it is to be used in sterile processes, it is supplied with electropolished surfaces and profiled elastomer rings to prevent cavity formation
Hydraulically relieved
Does not depend on the direction of shaft rotation
Dimensions as per DIN 24960 (EN12756)
d
d3
D6
D7
L1k
L2
L3
14
24.0
21
25
38.0
5.5
32.5
16
26.0
23
27
40.0
5.5
34.5
18
32.0
27
33
37.5
7.0
30.5
20
34.0
29
35
37.5
7.0
30.5
24
38.0
33
39
40.0
7.0
33.0
25
39.0
34
40
40.0
7.0
33.0
28
42.0
37
43
42.5
7.0
35.5
30
44.0
39
45
42.5
7.0
35.5
32
47.0
42
48
42.5
7.0
35.5
33
47.0
42
48
42.5
7.0
35.5
35
49.0
44
50
42.5
7.0
35.5
38
54.0
49
56
45.0
8.0
37.0
40
56.0
51
58
45.0
8.0
37.0
43
59.0
54
61
45.0
8.0
37.0
44
61.0
56
63
45.0
8.0
37.0
50
66.0
62
70
47.5
9.5
38.0
53
68.5
65
73
47.5
9.5
38.0
60
80.0
72
80
52.5
10.5
42.0
65
85.0
77
85
52.5
10.5
42.0
70
90.0
83
92
60.0
11.5
48.5
75
99.0
88
97
60.0
11.5
48.5
80
104.0
95
105
60.0
11.5
48.5
95
119.0
110
120
65.0
13.0
52.0
100
124.0
115
125
65.0
13.0
52.0
- Name
- BV-TNG Elastic mechanical seal
- Description
-
NV-1D universal double seal for water and chemical pumps
Analog:
Burgmann M74-D
Design with a set of small springs.
Not hydraulically unloaded.
It does not depend on the direction of rotation of the shaft.
Dimensions to DIN 24960 (EN12756).
Materials of friction pair:
- carbon-impregnated carbon resin (B)
- antimony impregnated carbon graphite (A)
- silicon carbide (Q1, Q2)
- tungsten carbide (U3)
- ceramic Al O (V) 2 3
Elastomers:
- fluorine rubber, FKM (V)
- nitrile rubber (P)
- ethylene-propylene rubber, EPDM (E)
- PTFE
Parameters:
- p = 16 (25) bars
- t = -50 ... 220В°C
- v = 20 m/s
Do not require any adaptation of the pump.
To order seals, it is sufficient to know the pump grade or the manufacturer's seal number.
- Name
- NV-1D Dual mechanical seal in metal case
- Description
-
NV-FL mechanical seal in metal case for Flygt and Grindex pumps
Special seals designed for installation in FLYGT pumps.
Primary and secondary (upper and lower) seals.
FlygtВ® pump brand Seal size NV-FL 2004,2008,2012,2016 15 mm 2024 20 mm 2050,2052 15 mm 2060 20 mm 2066 20 mm 2070 22 mm 2071 22 mm 2075 20 mm 2082-330В 22 mm 2084 35 mm 2090,2125,2140 28 mm 2135В 35 mmВ 2101В 20 mmВ 2102 22 mmВ 2151-010,-011,-050 35 mmВ 2201-010В 45/35 mm 2201-011 HT/MTВ 45/35 mmВ 2201-011 LT 45/35 mm 2201-080,В -320, -430, -480, -590, -690 45/35 mmВ 2250 60 mm 2400 60 mm 2610, 2620 20 mm 2630, 2640 20 mm 2660 25 mm 2670 35 mm 3041 (РєСЂРѕРјРµ -250) 20 mm 3057 20 mm 3065 20 mm 3067 20 mm 3068 20 mm 3080В (РєСЂРѕРјРµ -330) 20 mm 3080-330 35 mm 3082 22 mm 3085 20 mm 3101 28 mm 3102 25 mm 3126-090, 3126-180 35 mm 3126-091, -180, -280, -290, -998 35 mm 3126-181 35 mm 3127 35 mm 3140 (РєСЂРѕРјРµ -980) 45 mm 3152 45 mm 3153 35 mmВ 3170 60 mmВ 3171 45 mmВ 3200 60 mmВ 3201 60 mmВ 3202 60 mmВ 3230, 3305, 3357 90/80 mmВ 3231, 3306, 3356 90/80 mm 3300В 90/80 mm 3310, 3350В 90/120 mmВ 3311, 3312 90/120 mmВ 3351 90/120 mm 3355 90/80 mmВ 3400, 3501, 3531, 3602В 90 mm 3500, 3530, 3600, 3601 90/120 mmВ 3800 90/120 mmВ 4351,4352, 4400 20 mmВ 4410, 4430, 4460В 60 mmВ 4450 35 mmВ 4630, 4640 45 mm 4650, 4660 45 mmВ 4670, 4680 60 mmВ 5100-210, -211, -220, -221В 35 mm 5100-250, -251, -260, -261 45 mmВ 5100-300, -310 60 mmВ 5150-300, -310 60 mmВ 5150-350, -360 90 mmВ 5530 35 mmВ 5540 45 mmВ 7045 60 mmВ 7050, 7051 90/80 mmВ 7060, 7076В 90/80 mmВ 7055, 7061 90/80 mm 7080 90/80 mm 7081, 7101, 7121 90 mmВ 7100, 7115, 7120, 7140 90/120 mmВ 7570, 7585 90/120 mm Electric motors 600 series 90 mmВ Electric motors 700 series 90 mm Electric motors 800 series 105 mmВ Electric motors 900 series 105 mmВ Do not require any adaptation of the pump.
To order seals, it is sufficient to know the pump grade or the manufacturer's seal number.
- Name
- NV-FL Mechanical seal in metal case
- Description
-
NV-4 universal seal with short axial length
Analog:
AES W02, ROTEN UNITEN 7K
Wave spring design.
Not hydraulically unloaded.
It does not depend on the direction of rotation of the shaft.
Materials of friction pair:
- carbon graphite (A, Р’)
- special chrome molybdenum steel (Р•)
- wolfram carbide (U3)
- silicon carbide (Q1, Q2)
Parameters:
- p = 16 (25) bars
- t = -50 ... 220В°C
- v = 20 Рј/СЃ
Does not require modification of the pump.
To order seals, you only need to know the brand of the pump or the serial number of the seal.
- Name
- NV-4 Mechanical seal in metal case
- Description
-
NV-SV/026 Mechanical seal for Lowara pumps SV series:
- 33
- 46
- 66
- 92
Analog:
Lowara, AES P0LXB
For stepped shaft d22 / d26 mm.
Design with central spring.
Hydraulically unloaded.
It does not depend on the direction of rotation of the shaft.
Materials of friction pair:
- resin-impregnated carbon graphite (Р’)
- silicone carbide (Q1)
Elastomers:
- FKM (V)
- NBR (P)
- EPDM (E)
Parameters:
СЂ = 20 bars
t = -30 ... 120°С
v = 20 m/s
Do not require any adaptation of the pump.
To order seals, it is sufficient to know the pump grade or the manufacturer's seal number.
- Name
- NV-SV/026 Mechanical seal for Lowara pumps
- Description
-
NV-SR Mechanical seal for Alfa Laval pumps series SSP SR/SRU:
- SR1 (shaft 20 mm)
- SR2 (shaft 30 mm)
- SR3 (shaft 35 mm)
- SR4 (shaft 45 mm)
- SR5 (shaft 55 mm)
- SR6 (shaft 75 mm)
Materials of friction pair:
- special CrMo carbon graphite steel
- silicon carbide carbon graphite
- silicon carbide on silicon carbide
Elastomers:
- Viton (FPM)
- NBR (P)
- EPDM (E)
Do not require any adaptation of the pump.
To order seals, it is sufficient to know the pump grade or the manufacturer's seal number.
- Name
- NV-SR Mechanical seal for Alfa Laval pumps
- Description
-
NV-D-SR Dual mechanical seal for Alfa Laval pumps series SSP SR/SRU:
- SR1 (shaft 20 mm)
- SR2 (shaft 30 mm)
- SR3 (shaft 35 mm)
- SR4 (shaft 45 mm)
- SR5 (shaft 55 mm)
- SR6 (shaft 75 mm)
Materials of friction pair:
- special CrMo carbon graphite steel
- silicon carbide carbon graphite
- silicon carbide on silicon carbide
Elastomers:
- Viton (FPM)
- NBR (P)
- EPDM (E)
Do not require any adaptation of the pump.
To order seals, it is sufficient to know the pump grade or the manufacturer's seal number.
- Name
- NV-D-SR Dual mechanical seal for Alfa Laval pumps
- Description
-
BV–2KS/120 mechanical seal for KSB pumps series SEWATEC/AMAREX KRT
Design with a set of small springs.
The springs are out of contact with the pumped liquid.
Fixed spring assembly.
Hydraulically unloaded.
Shaft diameter 120 mm
Materials of friction pair:
- silicon carbide (Q1, Q2)
Elastomers:
- FKM (V)
Springs:
- X12CrNi17.7
Other metal parts:
- stainless steel
Do not require any adaptation of the pump.
To order seals, it is sufficient to know the pump grade or the manufacturer's seal number.
- Name
- BV-2KS/120 mechanical seal for KSB pumps
