Standard chemical pumps

SAWA Pumpentechnik AG has been the general agency of the German company Dickow Pumpen GmbH & Co KG for the whole of Switzerland since 1979. The company Dickow manufactures pumps for chemical and petrochemical applications.

Dickow pumps are used for applications in tank farms for fuels, liquefied gases, chemicals, hot water, heat transfer oils (from +400°C to -120°C); airfield refuelling, marine; oil and gas processing or reverse osmosis / seawater desalination. There are different chemical standard pumps, e.g. according to DIN EN 22858 / ISO 2858 (NML, NMB, NCL) or according to DIN EN 733 (NKL, NKX).

Standard chemical pumps for the following fluids

Fuels (all types)
Acids, lyes, washing lyes, light acids
Hydrocarbons, solvents
Heat transfer oils
Refrigerant
Hot water
Cooling water
Condensate

Applications of the standardised chemical pumps

Type NCL, for use in the chemical, petrochemical and related industries as well as for high temperature heating systems
Type NM, the use is made where leakages are not permitted, i.e. for conveying toxic, explosive and generally environmentally harmful media
Type NKL, is used as circulation and feed pumps, in the municipal sector, in industry and in agriculture.

Features of the standardized chemical pumps

ATEX compliant
Version with magnetic coupling possible
The pumping of boiling media is possible without any problems.
Inducers can be used to improve the NPSHR

Sealing

single acting or double acting / flushed mechanical seal
Magnetic coupling, hermetically sealed

Standardized chemical pumps

Manufacturer, dealer, service provider

Pump types of our standardised chemical pumps

Standardised chemical pumps type NCL with shaft sealing to DIN EN ISO 2858 The DICKOW standardised chemical pump, type NCL, was developed for use in the chemical, petrochemical and related industries as well as for high-temperature heating systems. The dimensions and performance characteristics correspond up to DN 150 DIN EN ISO 2858:2011-12. The larger nominal sizes have been adapted to the requirements of the operators and are also graded so that the best possible efficiency is achieved in all cases of need. The maximum flow rates are approx. 1000 m3/h. Due to a wide range of materials and the possibility of installing a wide variety of shaft sealing systems, DICKOW standardised chemical pumps are suitable for pumping almost all media that are conveyed in the above-mentioned industries. Examples include fuels (of all types), acids, alkalis, hydrocarbons, heat transfer oils, refrigerants, solvents, etc.

Standard chemical pumps type NML/NMB according to DIN EN 22858 / ISO 2858 with permanent magnetic coupling. The DICKOW pumps of the NM series are hermetically sealed centrifugal pumps with permanent magnetic couplings, without shaft feed-through to atmosphere. The NM pumps are used wherever leakage is not permitted, i.e. when pumping toxic, explosive and generally polluting media. The NM pumps operate maintenance-free, their service life is far longer than that of conventional pumps with mechanical seals. Double-acting mechanical seal systems with complex sealing pressure systems or storage tanks are not required. Maximum flow rate and head: approx. 400 m3/h and approx. 150 m The maximum operating temperature is 200°C for the NML series and 240°C for the NMB version.

Standardized chemical pumps Type NKX Thermal oil circulation pump, according to DIN EN 733 With the NKX series, the pump manufacturer Dickow has developed a completely new pump for the circulation of thermal oil. The pump housing is designed for 16 bar and 350 °C. The new pump series thus extends the application limits of the previous NKLs series, which will be replaced by the NKX in future - with exactly the same dimensions. The NKX pump is used as a circulating pump for thermal oil in mainly industrial heating systems. The maximum flow rates are 400 m³/h, the maximum delivery heads are approx. 90 mFS. The dimensions and performance range of these centrifugal pumps comply with DIN EN 733, i.e. the sizes are graded so that the best possible efficiency is achieved in all applications.