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NSL Vertical Inline Centrifugal Spacer Pump


DESMI NSL vertical inline centrifugal spacer pumps

The design of the NSL pumps is for medium/high flow capacities up to 6,600 US GPM & medium head up to 150mLC. The pump must be configured as vertical (especially recommended where small overall ground floor is available reduces floor space requirement with 50%) & must be radially split, single stage centrifugal pump with connecting flanges according to international standards acc. to DIN, ANSI or JIS. Installation without alignment is required. The design of the pump needs to include mounting with electric motors having different international flange dimensions.

Material construction of the pump casings needs to be ductile cast iron GGG40 EN1561-GJL-400/DIN1693 for plain water, which shall be able to manage a working pressure of 16 bar (tested 1,5 x working pressure). For seawater applications, the pump construction of the casing shall be RG5 bronze EN1982 CC491K/DIN17656.

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 to be fitted with bearings at both top and bottom to give a robust construction, designed for trouble free continuous duty.

The pump needs to be fitted with dynamically balanced impellers acc. to ISO1940/1-1986 (E) G6.3 that incorporates advanced double-curved blades to ensure low NPSH-values and high efficiency resulting in lower energy consumption and therefore lower running costs.
The construction material of the impeller shall be NiAlBz EN1982 CC333G/DIN17656 (as standard) or duplex stainless steel AISI329/1.4460.

The seal type shall be 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.

DESMI have manufactured pumps for District Energy in bigger scale since 1950, has ISO 9000 certification – and own branches, distributing partners and service providers in most markets around the world. DESMI have key focus on energy efficient solutions (often up to 85%) with easy maintenance, low downtime and a long life cycle. DESMI’s location in Denmark, the country with most experience and latest technology within District Energy is a huge advantage for our company – as we are constantly dealing with leading consultants and utility /energy companies, helping us to raise our game even further.

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Join DESMI at Marintec China, 3-6 December 2019

The Maritime exhibition, Marintec China, is taking place December 3-6 in Shanghai, China

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Join DESMI at Middle East District Cooling Stakeholders Conclave 4-5 December 2019

The Middle East District Cooling Stakeholders Conclave is taking place December 4-5 at the Radisson Blu Hotel, Dubai Waterfront

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Join DESMI at The BWMTech Conterence, 9-11 December 2019

2 day conference with ship owner case studies on ballast water and brand new workshop on crew training taking place in London 9-11 December 2019

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Join DESMI at SEPEM 2020, 28-30 January

SEPEM Industry Northwest is taking place January 28-30 2020 in Rouen, France

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Join DESMI at the Ghana Trade Show, 30 Jan - 1 Feb 2020

Ghana Trade Show is the main international event for all trades. Setting new highs for participation from over 20 countries & visitors from over 12 African countries taking place 30 Jan - 1 Feb 2020 in Accra, Ghana at the Accra International Conference Center

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Join DESMI at EuroMaritime, 4-6 February 2020

Join the the main trade meeting of the Euromediterranean maritime industry taking place February 4-6 2020 in Marseille, France at Marceille Chanot

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Join DESMI at Sea Japan, 11-13 March 2020

Sea Japan is the biggest maritime event in Japan taking place March 11-13 2020 in Tokyo, Japan at the Tokyo Big Sight, west hall

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Join DESMI at the Irish Skipper Expo, 13-14 March 2020

The Irish Skipper Expo is taking place March 13-14 2020 in Limerick, Ireland at the Castletroy Park Hotel

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Join DESMI at Asia Pacific Maritime, 18-20 March 2020

Asia Pacific Maritime (APM) is a premier exhibition and conference in Asia showcasing a complete overview of the vessel sectors – services and solutions, technology, vessels equipment, machineries, supplies, and many more taking place March 18-20 in Singapore at the Marina Bay Sands

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Join DESMI at ISH China & CIHE 2020, 11-13 May

ISH China & CIHE – China is an International Trade Fair for Heating, Ventilation, Air-Conditioning, Sanitation & Home Comfort Systems taking place May 11-13 2020 in Beijing, China at the New China International Exhibition Center

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Join DESMI at Maritime Industry Gorinchem, 12-14 May 2020

The Maritime Industry exhibition is taking place May 12-14 May 2020 in Gorinchem, Netherlands at the Evenementalhal Gorincham

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Join DESMI at the Submarine Technology Symposium, 12-14 May 2020

The Submarine Technology Symposium taking place May 12-14 2020 in Laurel, USA

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Join DESMI at CHEMUK 2020, May 13-14

The UK's chemical industries supply chain expo is taking place May 13-14 2020 in Stretford, United Kingdom at the Eventcity Limited

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Join DESMi at AquaCulture UK 2020, 19-21 May

Aquaculture UK is the most important aquaculture exhibition and conference held in the British Isles taking place May 19-21 2020 in Aviemore, Scotland at the Macdonald Aviemore Resort

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Join DESMI at Posidonia 2020, 1-5 June

The International Shipping Exhibition taking place June 1-5 in Athens, Greece at the Metropolitan Expo

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Join DESMI at Future Surface Fleet, 2-4 June 2020

Future Surface Fleet 2020 explores the wide range of programmes being conducted by nations and how new and changing technologies will influence the maritime environment over the next 25 years. - taking place 2-4 October 2020 in Portsmouth, UK at the Portsmouth Mariott Hotel

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Join DESMI at FLOWTECH CHINA 2020, 03-05 Jun

Flowtech China is taking place June 03-05 2020 in Shanghai, China at the National Convention & Exhibition Center

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Join DESMI at Philipines Marine, 16-18 June 2020

The 7th Edition of PHILIPPINES MARINE (PHILMARINE) 2020 co-located with Shipbuild Philippines and O­ffshore Philippines 2020 is taking place June 16-18 2020 in Pasay City, Philippines at the SMX Convention Center Manila, Mall of Asia Complex

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Join DESMI at Hillhead 2020, 23-25 June

Hillhead is the largest exhibition of its kind anywhere in the world taking place June 23-25 2020 in Derbyshire, United Kingdom at the Hillhead quarry exhibition

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Join DESMi at Zambia Trade & Fair 2020, 26 Jun - 02 Jul

Zambia Trade & Fair is taking place June 26 - July 02 2020 in Ndola, Zambia at the Trade Fair Grounds

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Join DESMI at Marintec 2020, 11-13 August

Marintec South America is s a must attend trade-show for anyone who wants to stay ahead in the maritime market taking place August 11-13 2020 in Rio de Janeiro, Brazil at the SulAmerica Convention Center

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Join DESMI at Nor-Fishing, 18-21 August 2020

One of the largest fisheries technology exhibitions in the world, Nor-Fishing is taking place August 18-21 2020 in Trondheim, Norway at the Trondheim Spektrum

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Join DESMI at SMM, 8-11 September 2020

The leading international maritime trade fair SMM is taking place September 8-11 2020 in Hamburg, Germany at Hamburg Messe + Congress

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Join DESMI at Euronaval 2020, 20-23 October

The world naval defense exhibition taking place October 20-23 2020 in Paris, France at Paris Le Bourget Exhibition Centre

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