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The cruise ship has a capacity for abt. 2,500 passengers and 600 crew members. At sea the provision of food and water is challenging from the logistics point of view. Thus shipboard sea water desalination plants are operated to ensure the supply of up to 2,000 tons of fresh water per day also during the journeys. The plants draw in the untreated water from the sea, filter it and remove salts and minerals either in the thermal process (distillation process) or membrane process (reverse osmosis).
The evaporator process is only suitable for the moving ship at sea because the waste heat from the diesel generators is exploited for heating up the water to be treated. At reduced speed or during the ship’s stay in the harbour, the reverse osmosis plant is switched on or stored fresh water is used.
Switching from one water circuit to the other to use the appropriate process and residual degassing cause some air to accumulate within the devices and the pipelines. It must be safely discharged during operation. In addition, saline water and heat are highly corrosive especially in the thermal desalination plants. The body and internal parts of the float-controlled bleeding and venting valve EB 1.12 are therefore made of CrNiMo steel (1.4547 / 1.4529 / 1.4539), the profile clamp is made of 1.4404. The valve has been designed for a flow rate of 5.9 m³ at an operating pressure range of 0 - 16 bar and can be employed within a temperature range of -10 through to +30°C.
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| Provider | gradwerk |
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