Trailing Suction Hopper Dredgers (TSHD)ĭe Hollandsche Yssel double walled dredge pumps are available for suction pipes 8” – 10” – 12” – 14” – 16” – 18” – 20” – 24” and 28”, so from 200mm up to 700mm.Self Manoeuvring Cutter Suction Dredgers (SM CSD). The double walled dredge pumps are used in This makes it an environmentally friendly and maintenance free pump seal. This leak-free mechanical seal using Silica Carbide rings in a stainless steel housing does not need gland water neither grease lubrication. The older system using a stuffing box with flushing gland-water and grease lubrication nowadays is often changed by the modern, newly developed mechanical seal. Shaft sealing arrangement can be executed in many different options. Moreover, compared to competitor’s single walled pumps the safety of the ship and its personnel in case of a breaking single walled pump shell is not in danger. The double walled version makes a complete wear possible whilst a safe use of the shell is guaranteed. The impeller is treaded on the trapezoid thread on the pump shaft and a three-partied ring enables easy dismounting of the impeller. All parts manufactured with minimum tolerances and are interchangeable. All parts, susceptible to wear, are manufactured from high-chrome alloy of the best quality or an excellent Nihard IV quality with a hardness of 550 HB. (Capacity range from 500 up to 10.000 m3/hr)ĭe Hollandsche Yssel double walled dredge pumps are of modern design and made of the best quality wear-resistant material.
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