TYPE MS33
METRIC SERIES GENERAL PURPOSE SEAL FOR GAS OR LIQUID
INTRODUCTION
The dimensional data provided may be used as guide in providing proper seal space in new design as well as comparing space requirements when considering the MS33 seals as replacements for other type rotating seals. If the dimensions are not adaptable, we can provide variations in seal length, stationary seat configuration and material to meet your needs. On request we will furnish dimensions for shaft diameters over 4 inches.
MATING RINGS
For optimum sealing and long seal life, NTI mating rings should be used with NTI seals. They are available in a variety of styles and configurations. Consult factory to determine the correct size and type of mating ring to be used with your NTI seal. "O" ring mating rings are also available.
IMPORTANT: In cases where the mating ring temperature changes drastically, such as dry starting, it is advisable to use a stainless steel, ni-resist, tungsten carbide, bronze or other metal mating ring, as ceramic may crack.
GENERAL APPLICATION INFORMATION
Type MS33, is a general purpose, economical seal designed for use in fluid or gas sealing of rotating shafts. Removable spring construction allows for greater variation in operating length using the same seal head assembly. This seal is effective at relatively high pressures and can be used with a short spring in a compact seal cavity. Common applications include swimming pool pumps, chemical pumps, sea water pumps and gear boxes.
OPERATIONAL
CAPABILITIES
|
Pressure
Range-
|
0
to 200 P.S.I.
|
|
Temperature
Range-
|
-30°F
to 250°F with Buna "N" bellows
|
|
-65°F
to 400°F with Viton "A" bellows
|
|
|
-28°F
to 248°F with EPDM bellows
|
|
|
Speed
Range-
|
0
to 1,500 F.P.M. at seal face O.D.
(Depending on shaft size and RPM) |
MEDIA
The standard seal can be used with most lubrication oils or water. Certain synthetic oils, and high temperature hydraulic fluids require special materials.
MATERIAL CONSTRUCTION
Metal
components - Stainless Steel
Bellows - Buna or Viton
Seal Face - Carbon
Seal Seat - Ceramic
|
NTI
SEALS SPEC CONTROL NUMBER
|
|||
|
MS33
|
000
|
00
|
00
|
|
Seal
Type
|
Shaft
Size
|
Suffix
Seal #
|
Mating
Ring
|
|
MATERIAL
DESIGNATION - SUFFIX CODE
MATERIAL USED |
||||||
|
NTI
SPEC. NO. SUFFIX
|
BELLOWS
|
SPRING
|
SHELL
|
SEAL
FACE
|
MATERIAL
MATING RING
|
CODE
NO.
|
|
01
|
Buna
"N"
|
S.S.
|
SS
|
Tungsten
Carbide
|
Tungsten
Carbide
|
10
|
|
02
|
Buna
"N"
|
SS
|
SS
|
Carbon
|
Ceramic
|
11
|
|
03
|
Viton
"A"
|
S.S.
|
SS
|
Tungsten
Carbide
|
Ni-resist
|
12
|
|
04
|
Viton
"A"
|
S.S.
|
SS
|
Carbon
|
Bronze
|
13
|
|
05
|
EPDM
|
SS
|
SS
|
Tungsten
Carbide
|
Silicone
Carbide
|
14
|
|
06
|
EPDM
|
SS
|
SS
|
Carbon
|
Stainless
Steel
|
15
|
|
07
|
Viton
|
Monel
|
Monel
|
Carbon
|
Tungsten
Carbide
|
16
|
|
08
|
Buna
"N"
|
SS
|
SS
|
Siliconized
Graphite
|
Stainless
Steel
|
17
|
Other combinations of materials are available also in standard sizes. Consult factory.
MS33 Metric Specifications
METRIC
SHAFT SIZES 12-38
|
Metric
Shaft Size D
|
Size
Code
|
Housing
Clearance
D1 |
Shaft
Dia.
D2 |
Seal
O.D.
D3 |
Seal
Length
L1 |
Mating
Ring Length
L2 |
Seat
Housing Depth
L3 |
|
12
|
0120
|
23.00
|
19.00
|
21.70
|
23.90
|
8.60
|
5.50
|
|
14
|
0140
|
25.00
|
21.00
|
23.90
|
26.40
|
8.60
|
5.50
|
|
16
|
0160
|
27.00
|
23.00
|
26.70
|
26.40
|
8.60
|
5.50
|
|
18
|
0180
|
33.00
|
27.00
|
30.40
|
27.50
|
10.00
|
7.00
|
|
20
|
0200
|
35.00
|
29.00
|
33.40
|
27.50
|
10.00
|
7.00
|
|
22
|
0220
|
37.00
|
31.00
|
33.40
|
27.50
|
10.00
|
7.00
|
|
24
|
0240
|
39.00
|
33.00
|
38.00
|
30.00
|
10.00
|
7.00
|
|
25
|
0250
|
40.00
|
34.00
|
39.30
|
30.00
|
10.00
|
7.00
|
|
28
|
0280
|
43.00
|
37.00
|
42.00
|
32.50
|
10.00
|
7.00
|
|
30
|
0308
|
45.00
|
39.00
|
43.95
|
32.50
|
10.00
|
7.00
|
|
32
|
0320
|
48.00
|
42.00
|
45.80
|
32.50
|
10.00
|
7.00
|
|
33
|
0330
|
48.00
|
42.00
|
45.80
|
32.50
|
10.00
|
7.00
|
|
35
|
0350
|
50.00
|
44.00
|
49.00
|
32.50
|
10.00
|
7.00
|
|
38
|
0380
|
56.00
|
49.00
|
52.80
|
34.00
|
11.00
|
8.00
|
METRIC SHAFT SIZES 40-75
|
Metric
Shaft Size D
|
Size
Code
|
Housing
Clearance
D1 |
Shaft
Dia.
D2 |
Seal
O.D.
D3 |
Seal
Length
L1 |
Mating
Ring Length
L2 |
Seat
Housing Depth
L3 |
|
40
|
0400
|
58.00
|
51.00
|
55.80
|
34.00
|
11.00
|
8.00
|
|
43
|
0430
|
61.00
|
54.00
|
58.50
|
34.00
|
11.00
|
8.00
|
|
45
|
0450
|
63.00
|
56.00
|
61.00
|
34.00
|
11.00
|
8.00
|
|
48
|
0480
|
66.00
|
59.00
|
64.00
|
34.00
|
11.00
|
8.00
|
|
50
|
0500
|
70.00
|
62.00
|
66.00
|
34.50
|
13.00
|
8.50
|
|
55
|
0550
|
75.00
|
67.00
|
71.65
|
34.50
|
13.00
|
8.50
|
|
60
|
0600
|
80.00
|
72.00
|
78.40
|
39.50
|
13.00
|
8.50
|
|
63
|
0630
|
83.00
|
75.00
|
81.50
|
39.50
|
13.00
|
8.50
|
|
65
|
0650
|
85.00
|
77.00
|
84.30
|
39.50
|
13.00
|
8.50
|
|
68
|
0680
|
90.00
|
81.00
|
89.65
|
37.20
|
15.30
|
9.50
|
|
70
|
0700
|
92.00
|
83.00
|
89.65
|
37.20
|
15.30
|
9.50
|
|
75
|
0750
|
97.00
|
88.00
|
96.80
|
44.76
|
15.30
|
9.50
|