PRODUCT DESCRIPTION

It is the most advanced mechanical seal alternative to the classic rubber bellows systems. The MTM908 propeller shaft mechanical seal is the first system designed for stern tube with an integrated pneumatic barrier Watershield®. Thanks to its design, it is the world's most compact shaft seal with integrated safety barrier. The stationary case can accommodate up to 6 radial holes (optional) that can be used to connect: an additional flushing, a temperature sensor, a vibration sensor (triaxial), a pressure sensor or a dedicated vent line. The stationary part, made of techno polymer as standard, can be fixed to the tube by means of a series of grains or a clamp. The stationary ring can be supplied in graphite resin (G) or in antimony graphite (G1) and is provided monolithic or inserted in a 316 stainless steel case. The rotating ring is constrained to the propulsion shaft with a series of grub screw (up to diameter 100) or with a clamp (over diameter 100) and is available in 316, Duplex® or Super Duplex® stainless steel. The inflatable pneumatic barrier ring Watershield®, integrated into the stationary case, makes the MTM908 the most technologically advanced product in the market for propeller shaft seals for tube installation. The integrated preload system guarantees an extremely simple installation that does not require any particular specialization.

Operating limits:

D= 70 – 185mm
P1= 2 bar
T= - 30 a + 900°C
V= 20 m/s.
Axial movement: up to +/- 10.0 mm
Radial movement: up to +/- 5.0 mm
Angular movement: up to 2°

Elastomers material:

Epdm (E)
Nbr (N)

Case material:

Techno polymer POM (TM)
Aluminum (AL)
Stainless steel 316 (J1)

Faces materials:

Resin carbon graphite (G)
Antimony carbon graphite (G1)
Resin carbon graphite insert (G2)
Antimony carbon graphite insert (G3)
Stainless steel 316 (J1)
Duplex (D)
Super Duplex (D1)

First in the world fitted inside with a pneumatic barrier

Technical Drawing

Preload screw

Pneumostop

Components

1. STATIONARY SEAL FACE
2. ROTARY SEAL FACE
3. STATIONARY CASE
4. O-RING
5. O-RING
6. ROTARY CLAMP
7. O-RING
8. RUBBER STRIP
9. SCREW
10. STATIONARY CLAMP
11. WASHER
12. NUT
13. AIR INLET PIPE
14. INFLATABLE ELASTOMER RING
15. SCREW
16. SCREW
17. SCREW
18. PRELOAD SCREW

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