In-line fixed speed pumps with Kolmeks-motor

Acid-Resistant In-line Constant Speed Pump, Duplex
Applications: Building heating and cooling systems, industrial heating and cooling water circulation, district heating, process fluids, water treatment and pressure boosting systems, boiler feed and condensate circuits, washing and rinsing systems, chemical transfer and circulation in process and chemical industries, pulp and paper industry, chemical circulation in surface treatment plants, as well as cooling and […]
Bronze In-line Constant Speed Pump, PN10
Applications: Seawater, brackish water, chloride-containing process water, saline solutions, domestic water, hot domestic water, drinking water systems, chlorinated water, swimming pool water, shipbuilding industry, marinas, coastal water utilities, water supply and municipal engineering, demineralized water, osmosis water, water circulation in the food industry, beverage industry, cooling water circulation, condensate, closed and open circulation systems, domestic […]
Cast Iron In-line Constant Speed Pump, PN10
Applications: Clean liquids, heating networks, district heating primary and secondary circuits, building heating and cooling systems, cooling water circulation, fire water pumping, glycol mixtures, hot and cold water, boiler feed water, condensate, industrial cooling water circulation, cooling circuits in power generation, general industrial circulation pumping, residential buildings, commercial properties, shops and shopping centers, schools and […]
Cast Iron In-line Constant Speed Pump, PN16
Applications: Clean liquids, heating networks, district heating primary and secondary circuits, building heating and cooling systems, cooling water circulation, fire water pumping, glycol mixtures, hot and cold water, boiler feed water, condensate, industrial cooling water circulation, cooling circuits in power generation, general industrial circulation pumping, residential buildings, commercial properties, shops and shopping centers, schools and […]
In-line Constant Speed Pump with Flanged Connection, PN10 and PN16
Applications: Residential buildings, schools and daycare centers, spas and swimming halls, commercial properties, shops and shopping centers, process industry and healthcare centers. Heating networks, district heating, heating and cooling systems, cooling water circulation, fire water pumping, glycol mixtures, domestic water, hot and cold water, boiler feed water, condensate, industrial cooling water circulation, cooling circuits in […]
In-line Constant Speed Pump with threaded Connection, PN10
Applications: Residential buildings, schools and daycare centers, swimming pools, commercial properties, shops and shopping centers, hospitals, healthcare centers, and care facilities. Heating networks, district heating secondary side, heating and cooling systems, cooling water circulation, fire water pumping, glycol mixtures, domestic water, hot and cold water, boiler feed water, condensate. Materials: Bronze CuSn10Zn2 Cast iron EN-GJL-200
Stainless steel In-line constant speed pump, AISI 316
Applications: Building heating and cooling systems, industrial heating and cooling water circulation, district heating, process fluids, water treatment and pressure boosting systems, boiler feed and condensate circuits, washing and rinsing systems, chemical transfer and circulation in process and chemical industries, pulp and paper industry, chemical circulation in surface treatment plants, as well as cooling and […]
Pumpselector
Choosing the right pump model for your specific requirements.
Pump Design
Monoblock in-line centrifugal pumps equipped with Kolmeks motors. The pump impeller is mounted directly on the motor shaft (no separate coupling). The pump and motor are separate components, which reduces the pump’s susceptibility to impurities in the pipeline. The electric motor bearings are permanently lubricated and maintenance-free. The pumped liquid does not lubricate the bearings.
Pumps equipped with Kolmeks motors are constant speed pumps, but all motors are suitable for use with frequency converters. The pumps are designed for long service life in demanding conditions, with emphasis on ease of maintenance and recyclability of materials.
Pump Range, Sizes, and Materials
Pumps are available with flanged connections in sizes DN32…DN300, as well as threaded versions in sizes G1″–G1 1/4″, with power ratings from 0.05 to 110 kW.
The range of in-line constant speed pumps equipped with Kolmeks motors includes the AE, L, AL, and AKN series.
Material options for constant speed pumps include cast iron, bronze, and acid-resistant stainless steel.
Materials and Applications
- Grey cast iron pumps are used as circulation, booster, and transfer pumps for clean liquids.
- Ductile cast iron pumps are used, for example, in power plants and as booster pumps on the primary side of district heating systems.
- Bronze pumps are suitable for clean, oxygen-rich, non-aggressive liquids in domestic water, as well as for circulation, booster, and transfer applications.
- AISI316 and dupex pumps equipped with IEC standard motors meet the needs of various industries such as process, energy, chemical, and paper industries. They are suitable for demanding chemical and petrochemical applications, as well as closed and open systems, cooling circuits, industrial systems, and water distribution.
Advantages
- Versatile solution thanks to a wide selection of materials and accessories
- Energy-efficient hydraulic design enabling high efficiency
- Impeller mounted directly on the shaft (no separate coupling)
- Long service life – average lifetime of Kolmeks pumps is approximately 25 years
- Spare parts widely and quickly available
- Spare and replacement service enables long pump life, reduced carbon footprint, low life cycle costs, and a 2-year warranty
- Compact motor and impeller design enables small installation space and easy maintenance
- Reliable delivery and service support from a Finnish company ensures dependable operation
- Availability of spare parts
- Compact design with small space requirement
- Reliable and simple construction
- Wide range of accessories for every application
- Energy-efficient pump enables low life cycle costs
- Comprehensive selection of mechanical shaft seals
- High efficiency and low operating noise
- Low NPSHr value
- Versatile solution thanks to a wide range of material and accessory options


24/7 maintenance and spare parts services
Kolmeks provides spare parts and maintenance services for pumps and air separators. We service pumps of various sizes reliably and professionally, ensuring their efficient and trouble-free operation.
We offer responsive maintenance support and spare parts services to keep our customers’ systems up and running in all situations.