Cooling Water Pump · Cooling Water Pumps
This is a vertical in-line centrifugal pump designed for high-temperature applications. The DESMI NSLH (HT/LT) is designed for handling hot fresh water, providing cooling functionality with both high-temperature and low-temperature capabilities. Available in a range of sizes from 80mm to 300mm DN, the pump can deliver a flow rate between 50 and 2000 m³/h with a head range of 15 to 80 meters. Constructed with cast iron and high-temperature seals, the pump is driven electrically and boasts an approximate variant count of 120. Introduced in 2005, the NSLH (HT/LT) series continues to be a popular choice for demanding applications. Common failure points include mechanical seal issues during high-temperature cycling, bearing wear, cavitation due to insufficient NPSH, and thermal stress on the casing. Typical spare parts include high-temperature seal cartridges, bearings, and gaskets. For high-temperature service, the seal should be replaced every 6000 hours, and attention should be paid to thermal cycling's impact on pump alignment.
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HT service: seal every 6000h. Thermal cycling impact on alignment.
High-temp seal cartridge, bearings, gaskets.
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