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The design of the suction side provides for a perfect flow, and the inlet is placed in line with the outlet.     Request Quote Product information Applications District heating/cooling Seawater Water transport or circulation Cooling towers distribution Chiller distribution Scrubber (flue gas cleaning) Aquaculture (Main Pump or Intake Water Pumps)   Ballast and cooling water pumping in the marine industry are also among the many tasks that the DSL pumps solve to perfection.    Technical Product Specifications The pump is designed for the high flow capacities up to 4000 m³/h (17,500 US GPM9. Manufacturing can be vertical in-line, & single-stage, radially split, double suction centrifugal pump with connecting flanges according to international standards. Installation without alignment is required. Vertical design especially is recommended where small overall ground floor is available. The design of the suction side provides for a perfect flow, and the inlet is placed in line with the outlet.   The design shall incorporate advanced double-suction, closed impeller with double-curved blades, with a helical pump casing in one casting - resulting in high efficiency and low NPSH-values. The pumps are designed for mounting with electric motors having flange dimensions acc. to either IEC or NEMA standard.  Pump casings are normally in cast iron (GG20~EN1561-GJL-200) for fresh water or cold seawater (up to 15°C) - or ductile cast iron (GGG40~EN1563-GJL-400-15) for hot water / high pressure applications - or NiAlBz (EN1982 CC333G) for seawater applications. The pump casing shall be equipped with a NiAlBz EN1982 CC333G/DIN17656 replaceable sealing ring. Material of the shaft shall always be of high quality duplex stainless steel AISI329/1.4460. The pumps shall be fitted with bearings and mechanical shaft seal at both top and bottom. This gives a robust construction, designed for trouble-free continuous duty.   The impeller shall be made in NiAlBz EN1982 CC333G/DIN17656 (as standard) or duplex stainless steel AISI329/1.4460 both with double-curved blades to ensure low NPSH-values and high efficiency. Shaft material shall be of duplex stainless steel AISI329/1.4460 with a single acting, mechanical shaft seal, which seals off the liquid cavity at the motor shaft. The pump needs to be equipped with a spacer coupling, which is a combined distance and flexible coupling between drive unit and electric motor. This makes it possible to remove the complete bearing housing with shaft, bearings, shaft seal and impeller – without dismantling the motor or pump from the piping. This represent significant advantages to the end user, who with this pump solution secures his installation trouble free maintenance with minimum down time. For added efficiency the internal pump casing and impeller can be coated for reduction of friction and thus increase in energy efficiency. As extra equipment the pump may be mounted with a priming pump of the water ring type, complete with filter and feed water tank, or it may be delivered with an ejector pump. Technical data Technical data Nominal diameter (DN) 150 to 500 Flow rate 50 Hz - Up to 6200 m³/h (27300 US gpm) 60 Hz - Up to 7400 m³/h (32600 US gpm) Head Up to 140 m (460 ft) Pressure Up to 25 bar (360 psi) Temperature Up to 150°C (284°F) Motor Standard and EX motors VFD Bulkhead/Wall-mounted ATEX approved Yes Pump curves Pump curves 50 Hz PDF   730 RPM 960 RPM 1450 RPM       JPG   730 RPM 960 RPM   1450 RPM     60 Hz PDF   876 RPM 1152 RPM   1740 RPM       JPG   876 RPM 1152 RPM   1740 RPM     Drawings Drawings DIMENSIONAL SKETCHES   DSL in-line centrifugal pump - Dimensional Sketches (p. 38) DSL without bottom bearing - Dimensional Sketches   ASSEMBLY DRAWINGS   DSL In-line centrifugal pump - Assembly Drawings DSL without bottom bearing - Assembly Drawings 3D DRAWINGS   DSL 150-265 DWG IGS STP   DSL 300-320 DWG IGS STP    DSL 350-460 DWG IGS STP       DSL 400-460 DWG IGS STP   DSL 500-515 DWG IGS STP Manuals Manuals DSL 300 / DSL 400 (T1343) English English Danish German French Russia Download DSL without bottom bearing (T1513) English English Danish Chinese Swedish Polish Download Brochures Brochures DSL Danish Danish English French Chinese American Dutch Download MORE BROCHURES Videos You must accept cookies to view this. Spare parts DESMI AFTER SALES SPARE PARTS Find Your Kit Pump selection programs Selection programs Find curves for existing pumps, get GA drawings for initial designs and compare efficiency, motor power, NPSH and other data to find the right pump. Selection programs DESMI Centrifugal Pumps The range of centrifugal pumps is made to meet the requirements of a wide array of different applications. Be it district heating, cooling, HVAC, fire-fighting or perhaps pumps for the engine room of a maritime vessel, a centrifugal pump is often the ideal choice. DESMI's centrifugal pumps are characterised by high-level efficiency and low NPSH values. Our vertical pumps require minimal space and provide easy access for maintenance of the pump's rotating parts. Click here to learn more Global Contacts DESMI is a global company Find address and contact information of our global locations Contact Newsletter Sign up for our newsletter and we'll send you the latest headlines directly to your inbox. 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