0 0
Hello Guest Login    |    Registration
Mechanical seals with springs in metal case

NV-2 Mechanical seal with spring in metal case

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

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