ROTAN® Geared to individual solutions Industry / Utility

Flow solutions built around you Key factors across all areas of the process industry are production reliability, productivity, and performance. These are precisely the areas addressed by the DESMI range of products, systems, and services. Our value-added liquid transport solutions support both local and global companies, helping to reduce climate impact through efficient and innovative technology. Even in complex applications with challenging media, our reliable products empower your ambitions for optimal performance, regulatory compliance, and sustainable growth. DESMI / Industry / Utility

ROTAN® One of the world’s Leading pumps within Internal Gear Pumps The internal gear pump principle was developed in 1915 by a Danish American. In 1921, he licensed a Danish company to manufacture the pumps, which have been continuously marketed worldwide under the ROTAN® name. The unique, modular concept of ROTAN® pumps is generally recognized as the most advanced internal gear pump design available today. The ROTAN® internal gear pump provides favourable flow conditions, as the direction of the liquid flow is only changed slightly through the pump. Method of operation CE All ROTAN® pumps are...

ROTAN® GP – General Purpose Pumps Pumps in cast iron, for clean, non-abrasive liquids. The simple and compact construction makes it a low-cost pump, often used in modified versions by OEM customers. A close-coupled OEM model is also available. GP pumps are designed for use with IEC or NEMA flange motors. Available with 90° angular configuration. Pump Model Capacity Range Differential Pressure Suction Lift Up to 0,5 bar / 7.25 psi vacuum while priming Up to 0,8 bar / 11.6 psi vacuum while pumping Viscosity Range Clean oil Glycol Vegetable oil Solvents Lube oil Waste oil Fish oil ROTAN® HD – Heavy...

ROTAN® PD – Petrochemical Duty Pumps PD pumps are designed for refinery and petrochemical applications, all pressure-containing components are in carbon steel. PD pumps meet API 676 standards with only a few exceptions. Available with 90° angular configurations. Pump Model Capacity Range Differential Pressure Suction Lift Up to 0,5 bar / 7.25 psi vacuum while priming Up to 0,8 bar / 11.6 psi vacuum while pumping Viscosity Range Fuel Oil Gasoline Lube oil Grease Other hydrocarbon based fluids Additives Bitumen Polystyrene Wax Animal fat Vegetable fat Chocolate Other special fluids Resin Paint...

ROTAN® ED – Environmental Duty Pumps Magnetically coupled pumps for ultimate protection against leakage. As only minimal maintenance is necessary, ED pumps will be a very economical solution compared with traditionally sealed pumps, especially where the application requires the use of double mechanical shaft seals. Often these applications are very different, resulting in the seals and support system requiring regular attention and/ or replacement. Thus, the life cycle costs for ED pumps are generally much lower than for pumps using two seals. Available with 90° angular configuration. Pump Model...

ROTAN® ED – Advantages One of the distinguished features of the ROTAN® ED range is that the pumped medium is hermetically contained in the system since the magnetic coupling eliminates the need for a shaft and mechanical seal, which could allow gaseous exchange between the pumped medium and the atmosphere. Unlike centrifugal pumps, the ROTAN® ED pump offers gentle liquid handling and a high priming vacuum as well as the pumping of highly viscous liquids. • Dynamic axial balancing system, minimizing axial loads, saving energy and increasing life (see picture on the left side) • Patented cooling...

Special features Markets & Applications DESMI Vertical Gear Pump To comply with increasing requirements for pumps in areas with no space for normal horizontal configuration, a new vertical design has been developed. Vertical design advantages: • Easier servicing - dismantling the whole rear end including bracket, rear cover, rotor and shaft without moving neither pump casing nor motor/gear. • Enough space for dismantling the rear cover, idler and idler pin, which makes it possible to disassemble the pump completely without removing the pump casing from the pipe system. • GP/HD/CD/PD pumps are...

Chocolate Pump A speciality within the ROTAN® range is the ROTAN® chocolate pump for pumping cocoa mass and chocolate. This special configuration has been utilized in the HD and CD ranges with all its advantages: Configuration with special clearances between the fixed and the rotating parts to protect the chocolate from excessive temperatures. Casing available as inline (standard) or 90° angular configuration (BCHD). Specially designed externally lubricated main bearing. Electrical Heating ROTAN® has for many years supplied pumps to the asphalt industry, and being a pump manufacturer we are too...

Additional Features All DESMI ROTAN® Pump Types Service on pumps without breaking any pipe connections - saving both time and money... True back-pull-out feature allows inspection/repair of the rotating cartridge without disturbing the piping or coupling alignment • Reduced downtime costs • Reduced labour costs Spares optimization The front cover can always be serviced without disturbing pipes or motor/gearbox. Normally the tungsten bearings last for two or three sets of “wear parts”, meaning that the bearings can be remounted in the serviced cartridge and seals can be cleaned, re-lapped and...

Selection of Pump size To select the pump size with this table, you should only know: - The capacity - The viscosity We start at the top of the table with the viscosity, and draw a line down, staying within the colour of the selected viscosity range (see example). Then we start at the right of the table, drawing a horizontal line starting with the required capacity (see example). The point where these two lines meet determines the pump size, defined by the diagonal lines in the table. If you do not hit one of these pump lines exactly, increase the capacity a bit. The speed is found vertically...