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TRAVAINI LIQUID RING VACUUM PUMP REPLACEMENT SEALS
U.S. Seal Head Shaft Oper. Seat Seat MFG. PART NOS.
Part No. Type mm. Hgt. O.D. Thk. Travaini RSD
VGM-8251 VGMH 22 27.5 37 10.0 950022SAC915 RSD-8251
VGM-8251 VGMH 22 27.5 37 10.0 950022SAC916 RSD-8252
VGM-8253 VGMH 28 32.5 43 10.0 950028SAC915 RSD-8253
VGM-8253 VGMH 28 32.5 43 10.0 950028SAC916 RSD-8254
VGM-8255 VGMH 35 32.5 50 10.0 950035SAC915 RSD-8255
VGM-8255 VGMH 35 32.5 50 10.0 950035SAC916 RSD-8256
VGM-8258 VGMH 43 34.0 61 11.0 950043SAC912 RSD-8258
VGM-8258 VGMH 43 34.0 61 11.0 950043SAC915 RSD-8259
VGM-8258 VGMH 43 34.0 61 11.0 950043SAC916 RSD-8260
VGM-8261 VGMH 55 34.5 75 13.0 950055SAC915 RSD-8261
VGM-8261 VGMH 55 34.5 75 13.0 950055SAC916 RSD-8262
VGM-8263 VGMH 75 44.7 97 15.3 950075SAC915 RSD-8263
VGM-8251Z VGMC-12 22 30.0 37 7.5 950022SAC915 RSD-8251
VGM-8251Z VGMC-12 22 30.0 37 7.5 950022SAC916 RSD-8252
VGM-8253Z VGMC-12 28 35.0 43 7.5 950028SAC915 RSD-8253
VGM-8253Z VGMC-12 28 35.0 43 7.5 950028SAC916 RSD-8254
VGM-8255Z VGMC-12 35 35.0 50 7.5 950035SAC915 RSD-8255
VGM-8255Z VGMC-12 35 35.0 50 7.5 950035SAC916 RSD-8256
VGM-8258Z VGMC-12 43 36.0 61 9.0 950043SAC912 RSD-8258
VGM-8258Z VGMC-12 43 36.0 61 9.0 950043SAC915 RSD-8259
VGM-8258Z VGMC-12 43 36.0 61 9.0 950043SAC916 RSD-8260
VGM-8261Z VGMC-12 55 36.5 75 11.0 950055SAC915 RSD-8261
VGM-8261Z VGMC-12 55 36.5 75 11.0 950055SAC916 RSD-8262
VGM-8263Z VGMC-12 75 48.7 97 11.3 950075SAC915 RSD-8263
VGMH
Shown with LS3.
VGMC-12
Shown with G6.
G60 is Optional
Features
- To DIN 24960
- Bi-Directional
- Elastomer Bellows
- Unbalanced
Materials
- Carbon Rotating Face
- SC - Stationary Face
- Viton Elastomers
- 304 SS - Metallurgy
Type L Type M
Performance Capabilities
• Temperature:
-350°F to +600°F
• Pressure:
Splash or very tight pressures (to 1psi)
under dynamic head conditions.
• Speed:
To 30,000 fpm.
• Contaiminants:
Prevents entry of dirt, chips grit, etc.
under both static and dynamic conditions.
Construction Features
• Pre-assembled.
• No shaft wear.
• Pressed into position in seconds.
• Seals in grease or other lubricant.
• Keeps out sand, dirt, grit and metal chips.
Product Description
Mini-Maze Type L is a package type, labyrinth seal
consisting of two precision rings, an aluminum outer
ring and a steel inner ring, that are permanently mated.
The close clearance path (or labyrinth) is ideal for use
as a combination seal and excluder for heavy lubricants
and air, oil, and water mists. The seal acts as a nonsparking
excluder because of the narrow space
between the mating surfaces.
The Mini-Maze Type M is for applications where higher
pressure must be sealed or where labyrinth leakage
must be minimal. Type M contains a series of equallyspaced
milled slots in the outer ring which extend to the
bottom of the groove in the inner ring. During rotation,
the pumping effect which results is sufficient to force
any leakage through the first groove of the seal and
back to the sump or reservoir. Ordinarily, an annular
groove in the bore of the seal retainer is employed to
collect the linkage pumped through the slots.
LABYRINTH SEALS
Installation Instructions
1. Maximum allowable shaft movement:
a: seals to size L100 – 0.005" radial ± 0.012" axial.
b: seals above L100 – 0.008" radial ± 0.012" axial.
2. To provide proper positioning and avoid side contact
of the labyrinth seal, it is recommended that the
inner ring be positioned against a rigid shoulder.
3. To properly mount the Mini-Maze seal, a machined
installation bushing is needed. The tool should be
long enough to seat the seal against the shaft or
housing shoulder. Preferably, the end of the tool
which touches the Mini-Maze seal should be hardened
to RC50 and should be ground to at least a
16RMS finish. This is to assure durability of the tool
and mar-free installation of the seal. The I.D. of the
tool should clear the shaft O.D., and the O.D. of the
tool should be slightly smaller than the O.D. of the
seal.
4. The shaft and bore dimensions should be machined
to recommended dimensions.
5. The I.D. and O.D. of the Mini-Maze, prior to installation,
should be coated with a lubricant compatible to
your unit. To install, use a steady upward force... no
hammering with a hammer. Apply steady pressure
until seal seats against housing or shaft shoulder.
6. During operation, the level of the sealed medium
(depending on its viscosity) should not be allowed to
exceed the height of the inner face of the seal.
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