Safety valves blow off when reservoir pressure passes the set figure and reseat once it falls back. They are the last protection against over-pressure if the governor or the unloader fails, and they are set and sealed by the maker.

This category lists 19 Büyükdemir references cross-referenced against 47 original equipment numbers. The cross-reference tables cover Knorr-Bremse, Scania, Volvo, DAF, Iveco and MAN parts. Opening pressure runs from 9 Bar to 20 Bar across 14 versions.

Most looked-up references in this group: Safety Valves ( Alu. Type 4-4911, Safety Valves (Brass Type) 4-4900, Safety Valve 4-4921 1934559 (Scania), Relief Valve / Safety Valve 4-4912, Safety Valves ( Alu. Type) 4-4916.

Manufactured by Büyükdemir Otomotiv in Istanbul, a producer of truck and trailer air system parts since 1957.

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Relief Valve / Safety Valve 4-4912

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Relief Valve / Safety Valve 4-4913

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Relief Valve / Safety Valve 4-4914

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Relief Valve / Safety Valve 4-4915

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Relief Valve 4-4822

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Safety Valve 4-4920

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Safety Valve 4-4921 1934559 (Scania)

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Safety Valves ( Alu. Type 4-4911