DESCRIPTION

The MTM908 has been designed to attack the market of small boats and it is the direct competitor of the well-known bellows mechanical seals for propeller shaft. It is the most revolutionary product in the naval market and thanks to a few improvements it guarantees the achievement of performance over 25.000 hours of continuous operation before maintenance. The MTM908 design makes it the most compact propeller shaft seal in the world for stern tube installations. The structure of the stationary part is usually made of techno-industrial polymers which avoid problems as ageing, puncture, fire to which the rubber is generally subject. It is the only system in the world which is fitted inside with a pneumatic barrier device, Watershield®. It is designed for shafts with diameter 70 mm up to 185 mm in a wide range of configurations. The stationary case can be designed with a maximum of 6 radial holes that allow to connect: one or more auxiliary cooling lines for the bearing, a pressure gauge, a temperature gauge, a flow gauge or a axial /radial vibration sensor. The interface dimensions are always customized by Microtem, thus designing the right product for each application.

Operating limits:

D= 70 – 185mm
P1= 2.5 bar
T= - 40 a + 150°C
V= 20 m/s.
Axial movement: up to +/- 10.0 mm
Radial movement: up to +/- 5.0 mm
Angualar movement: up to 2°

Elastomers:

EPDM
NBR

Face materials:

Silicon carbide
Tungsten carbide
Antimony carbon
Resin carbon
SS316
Duplex

First in the world fitted inside with a pneumatic barrier

Technical Drawing

Components

1. STATIONARY HOLDER
2. ROTARY RING
3. STATIONARY RING
4. GRUB SCREW
5. O-RING
6. O-RING
7. O-RING
8. INFLATABLE ELASTOMER RING
9. VALVE
10. NUT
11. GRUB SCREW
12. SCREW
13. PRELOAD SCREW
14. SPRING

ONLINE CONFIGURATOR

LOOKING FOR A SPECIFIC PRODUCT ?
Search for your mechanical seal using
the special configurator Microtem
SEARCH A PRODUCT

Revisions
mechanic seals

Find out more

Powered by DIGISIDE