Rotary Seals

Standard Profiles

Moontown solid PTFE Lip seals provide the designer with a significant improvement in performance over elastomer lip seals at a much lower cost than a mechanical face seal.


TYPE M50

TYPE M51

TYPE M50: Shaft speed up to 25 m/s. Maximum pressure = 5 bar. Used in lubricated and non-lubricated applications. Maximum temperature 100°C

TYPE M51: As type M50 but due to the metal support ring can be used up to 200°C or maximum O-ring material temperature.


TYPE M52

TYPE M53

TYPE M52: Improved sealing of gases and abrasive media due to higher lip load. Not recommended for shaft speeds greater than 8 m/s.

TYPE M53: As type M52 but can be used up to 200°C or maximum O-ring material temperature due to metal support ring.


TYPE M54

TYPE M55

TYPE M54: Incorporates spring loading for use in applications where shaft run-out or misalignment exists. Pressures up to 3 bar. Speed up to 7 m/s.

TYPE M55: As type M54 but can be used up to 200°C or maximum O-ring material temperature due to metal support ring.


TYPE M56

TYPE M57

TYPE M56: Shaft speed up to 30 m/s. Maximum pressure 1.5 bar. Low friction seal. Used as environmental seals.

TYPE M57: As type M56 but can be used up to 200°C or maximum O-ring material temperature due to metal support ring.


TYPE M58

TYPE M59

TYPE M58: Used in high pressure hydraulic applications, pumps, hydraulic motors. Operational PV factor 65 bar m/s max.

TYPE M59: As type M58 but the clamping is in the axial direction which requires the gland width to be held to the seal width -0.0/+0.1

Rotary Seals Hardware Design

Rotary Seal Selection Chart

Shaft Material and Hardness Finish

Cast Iron or Hardenable Steel

-40 to 65 HRc with hydraulic oil up to 15 bar
-58 to 65 HRc with pressure > 15 bar and non-lubricating or abrasive media.

Shaft

Ra 0.3 - 0.5 µm for lubricated applications
RA 0.2 - 0.4 µm for non-lubricated or abrasive media
RA < 0.2 µm in vacuum

Bore or O-Ring Side

Ra = 0.8 - 1.6 µm
Maximum bore finish of 0.8 - 1.6 µm for utilising a spring energised PTFE seal for OD sealing
Preferred finishing method is plunge grinding with no lead

Hardware Dimensions

NOM
SHAFT S
DIM

NOM
BORE B
DIM
SEAL
WIDTH W
DIM
8 22 7
24
26
9 22 7
24
26
10 22 7
24
26
11 22 7
26
12 22 7
24
28
30
14 24 7
28
30
35
15 26 7
30
32
35
16 28 7
30
32
35
17 28 7
30
32
35
40
18 30 7
32
35
40
20 30 7
32
35
40
47
22 32 7
35
40
47
24 35 7
37
40
47
25 35 7
40
42
47
52
26 37 7
42
47
NOM
SHAFT S
DIM
NOM
BORE B
DIM
SEAL
WIDTH W
DIM
28 40 7
47
52
30 40 7
42
47
52
62 8
32 45 7
47
52
35 47 7
50
52
62 8
36 47 7
50
52
62 8
38 52 7
55 8
62
40 52 7
55 8
60
62
72
42 55 8
60
62
72
45 60 8
62
65
72
48 62 8
65
72
50 65 8
68
72
80
52 68 8
72
55 70 8
72
80
85 10
56 70 8
72
80
85 10
58 72 8
80
60 75 8
80
85 10
90
NOM
SHAFT S
DIM
NOM
BORE B
DIM
SEAL
WIDTH W
DIM
62 80 8
85 10
90
63 85 10
90
65 85 10
90
100
68 90 10
100
70 90 10
100
72 95 10
100
75 95 10
100
78 100 10
80 100 10
110 12
85 110 12
120
90 110 12
120
95 120 12
125
100 120 12
125
130
105 130 12
140
110 130 12
140
115 140 12
150
120 150 12
160
125 150 12
160
130 160 12
170 15
135 170 15
140 170 15
145 175 15
150 180 15
160 190 15
170 200 15
180 210 15
190 220 15
200 230 15
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