685 metal bellow seal for Industrial pump

Temperature -20---400℃
Speed 20m/s
Presure 25bar
Standard size 16-100mm

685: Burgmann 685 replacement

Description:

685: Perfect replacement of Burgmann 685 mechanical seal

Structure Description:

Equivalent to Burgmann 685

Welded metal bellows design with totque transmission

Operating Limits:

Temperature:-20---400℃

Speed: 20m/s

Presure: 25bar

Standard size: 16-100mm

Material:

Seal ring: Car,Sic,Ssic,TC

Secondary seal: Carbon graphite

Spring and Metal parts:304,316,AM350,HAST.C,Inconel 718,Titanium

685 Dimensions(mm)

d

D3

D6

D7

L3

L8

L4

16

38.0

29.0

35.0

46.5

19.5

11.5

18

40.0

31.0

37.0

46.5

19.5

11.5

20

42.0

34.0

40.0

46.5

19.5

11.5

22

44.0

37.0

43.0

46.5

19.5

11.5

24

46.0

37.0

43.0

46.5

19.5

11.5

25

47.0

39.0

45.0

46.5

19.5

11.5

28

50.0

42.0

48.0

46.5

19.5

11.5

30

52.0

44.0

50.0

46.5

19.5

11.5

32

54.0

49.0

56.0

46.5

22.0

14.0

33

55.0

49.0

56.0

46.5

22.0

14.0

35

57.0

51.0

58.0

46.5

22.0

14.0

38

60.0

54.0

61.0

46.5

22.0

14.0

40

66.0

56.0

63.0

47.5

22.0

14.0

43

69.0

59.0

66.0

47.5

22.0

14.0

45

71.0

62.0

70.0

47.5

23.0

15.0

48

74.0

65.0

73.0

47.5

23.0

15.0

50

76.0

67.0

75.0

47.5

23.0

15.0

53

79.0

70.0

78.0

47.5

23.0

15.0

55

81.0

72.0

80.0

47.5

23.0

15.0

58

85.0

75.0

83.0

53.0

23.0

15.0

60

87.0

77.0

85.0

53.0

23.0

15.0

63

90.0

81.0

90.0

53.0

26.0

18.0

65

92.0

83.0

92.0

53.0

26.0

18.0

68

95.0

88.0

97.0

53.0

26.0

18.0

70

97.0

88.0

97.0

53.0

26.0

18.0

75

102.0

95.0

105.0

52.8

26.2

18.2

80

107.0

100.0

110.0

52.8

26.2

18.2

85

112.0

105.0

115.0

52.8

26.2

18.2

90

117.0

110.0

120.0

53.8

25.2

17.2

95

122.0

115.0

125.0

53.8

25.2

17.2

100

127.0

122.2

134.3

54.0

30.0

20.0


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