ProfiSeal is the supplier of the world’s only fireproof bulkhead seals for drive shafts. Like conventional bulkhead seals, the fireproof version has the task of sealing bulkhead openings for shafts. In addition, fireproof bulkhead seals ensure that fireproof bulkheads are actually fireproof.

In the event of a fire, carbon dioxide is released inside the seal, which protects the actual sealing rings by smothering the fire at this point. This prevents a fire in the engine room from spreading further into the ship.

ProfiSeal fireproof bulkhead seals are fireproof to A-60 and watertight, have a dry-running gap seal and are easy to install thanks to split housings and sealing rings.

Technical Features

• Fireproof A-60 and watertight, type-approval test per IMO 2010 FTP Code, Part 3 and MSC85/26, Add. 1, Annex 22

• Dry Running Gap-Seal

• Easy Installation due to split Housings and Seal Rings

• Shaft and Bulkhead electr. insulated (no Interference with the Cathodic Protection System)

• allowed radial Movement +/- 5 mm

• allowed axial Movement theoretical unlimited

• Insulation and Sheet Metal Cover delivered with the Seal

Operating Limits

• Shaft diameter (d): 50 … 500 mm (larger shaft sizes on Request)

• Pressure (p): max. 2 bar

• Temperature (t): -5 … +950°C

• Gliding Speed (v): max. 40 m/s

Bulkhead seals are designed to seal bulkhead openings to waves and protect adjacent spaces from flooding. In the event of a leak, the sections adjacent to the bulkhead seal remain dry, allowing a safe return to port,

ProfiSeal bulkhead seals have a dry-running gap seal and are easy to install thanks to split housings and split sealing rings.

Optionally, the bulkhead seal can be pressurised with a sealing gas (e.g. compressed air, etc.). In this way, possible leakage can be kept at almost zero over a long period of time.

Technical Features

• dry running gap-seal

• easy installation due to split housing and split seal rings

• allows high shaft speed

• allowed radial shaft movement: +/- 5 mm

Operating Limits

• shaft diameter: 50 … 600 mm

• medium to seal: seawater

• temperature: – 5° to + 70° C

• operating pressure (p): max. 3 bar

• gliding speed: max. 40 m/s

A propellershaft is part of the ship’s shaft system and seals open or closed stern tube systems so that no water can penetrate and no lubricating oil can escape. Similar to a mechanical seal, it is virtually leak-free and leaves no oil or grease residues in the fairway. At the same time, penetration of dirty water into the bilge is prevented – thus eliminating costly disposal.

The ProfiSeal propellershaft has a shaft diameter of 20 to 90 millimetres (or 100 to 280mm) and is available in both water- and oil-lubricated versions. The axial sealing concept prevents the shaft from running in, which is otherwise common with radial seals.

In addition to the propellershaft, we offer the Pneumostop unit, an inflatable standstill seal. This makes it possible to replace, repair or clean mechanical seals and propellershafts when the shaft is at a standstill without having to call in a shipyard.

Technical Features

• water or oil lubricated facetype seals

• seawater resistant also in in aluminium-version, for open or closed sterntube-systems

• easy installation

• high lifetime even in extremely dirty waters

• no shaft-wear like with radial type seals due to facetype design

• allowed axial shaft movement: +/- 5mm

• allowed radial shaft movement: +/- 2mm