Use of SCHMITT Pumps in Cold Stores
Background and Challenge
Cold stores and industrial refrigeration systems use secondary circuits between the cooling plant, storage system and consumers. Typical fluids include water/glycol mixtures, suitable secondary refrigerants, process water and approved heat-transfer fluids.
Primary refrigerants such as ammonia, CO₂ or fluorinated refrigerants are explicitly not promoted as pumped fluids on this page.
Challenge
As temperature decreases, viscosity and density change, affecting the pump curve, power consumption and required motor rating. Low temperatures also limit the suitability of materials, elastomers and sealing systems. Condensation and moisture must be considered when selecting the motor, enclosure rating and installation.
Solution
The material and pump series are selected according to the fluid, concentration and minimum temperature. As a guide based on current series data, PP versions are suitable from 0 °C, the specified PVDF versions from −5 °C, and stainless-steel UP and UP-DO pumps from −20 °C. Lower temperatures or other fluids require explicit approval of the specific series, materials, elastomers and seal.
UP and UP-DO are intended for conventional water/glycol circuits. Depending on the material, T and, on request, TE are suitable for tank and sump applications. NEOCHEM CORE/BASE is used for chemically demanding cooling fluids only after specific approval; current series data states a minimum fluid temperature of 0 °C.
Advantages of SCHMITT Pumps in Cold Stores
PP, PVDF, stainless steel or NEOCHEM design suitable for the fluid and lowest operating temperature.
Robust stainless steel construction made of 1.4571 for approved media.
UP or UP-DO to suit the sealing and supply concept.
T and, on request, TE for tanks, return lines and collection systems.
Concentration, temperature, viscosity and density are taken into account in the pump curve and motor sizing.
Motor, degree of protection and installation are selected for moisture and condensation.
Pumps for Cold Stores and Refrigeration Systems (Selection)
- Robust and durable design made from thick-walled, solid stainless steel components
- Compact close-coupled design
- Easy installation
- Suitable for high temperatures
UP-DO
Non-self-priming centrifugal pump
Made of Stainless Steel with Single or Double Mechanical Seal
- Dry run safe when using a pressurized seal support system
- No leakage of toxic or environmentally hazardous liquids
- Suited for high temperatures
- Meets the requirements of the German TA Luft air pollution control regulation
SCHMITT Pumps
Horizontal plastic pumps
Horizontal Stainless-Steel Pumps
