Safety Valve |
Relief Valve |
Safety valves are used in gas or steam systems. |
Relief valves are used in fluid or compressed air systems. |
Opening will happen at the set pressure. |
Opening is proportional to increase in the vessel pressure. |
Opening of valve is sudden if the set pressure is reached. |
Opening of valve is gradual, if the pressure increases gradually. |
Safety valve can be operated manually. |
Relief valve cannot be operated manually. |
Safety valve is set at 3% above the working pressure |
Relief valve is set at 10% above working pressure. |
Merchant ships have a marking on their hull know as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo, internationally, the Plimsoll line on a ship is officially referred to as the international load line. Every type of ship has a different level of floating and the Plimsoll line on a ship generally varies from one vessel to another. All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line. There are two types of Load line markings:- Standard Load Line marking – This is applicable to all types of vessels. Timber Load Line Markings – This is applicable to vessels carrying timber cargo. These marks shall be punched on the surface of the hull making it visible even if the ship side paint fades out. The marks shall again be painted with white or yellow colour on a dark background/black on a light background. The comp
Excellent information about Gas Safety Valve and relief valve. Really amazing comparison. Thanks for sharing.
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