Introduction
The document discusses two types of bulkhead seals designed to ensure watertight and gas-tight protection for adjoining spaces against flooding and gas leakage. These seals are particularly used in maritime applications.

Centrax Bulkhead Seal
The Centrax bulkhead seal is designed for watertight protection. It features an axially split aluminium housing mounted on the bulkhead opening, containing two segmented carbon rings that run directly on the shaft. The seal is equipped with garter springs and a sectioned thrust ring to maintain proper contact with the shaft and housing sides. It accommodates radial and axial shaft movements effectively, with minimal wear due to the self-lubricating properties of the carbon rings. Special designs are available for greater radial and angular movement. The Centrax seal is widely used in both merchant and naval shipping.

Specifications
The document provides a detailed table of specifications for the Centrax seal, listing sizes, shaft diameters, and other dimensions such as D, D1, D2, D3, E, L, L1, and L2, along with bolt specifications.

Simplex-Compact Bulkhead Seal
The Simplex-Compact bulkhead seal is designed for both gas-tight and water-tight sealing. It features a design based on the forward Simplex-Compact seal, with two sealing rings facing each other to create a barrier chamber filled with oil. This chamber is connected to a 4-liter oil tank, providing continuous lubrication and cooling through a circulator. The seal can be supplied in a completely radially and axially split form, and its dimensions can be adapted to accommodate shaft flanges, couplings, and bearings.

Conclusion
Both the Centrax and Simplex-Compact bulkhead seals offer robust solutions for maritime applications, ensuring protection against flooding and gas leakage with customizable options to meet specific requirements.