Hermetic-Pumpen GmbH products

Normal-suction design. Single-state design. Liquefied gas design. Dimensions and performance curves in accordance with EN 22858; ISO 2858

The CAM und CAMR range of HERMETIC pumps are completely closed. They operate using the canned motor principle which removes the need for any shaft seal. The CAM and CAMR ranges have been developed especially for the refrigeration applications.

Canned motor pumps are characterised by a compact, integrated unit without mechanical seal. The motor and  pump form a unit with the rotor and the impeller fitted onto a common shaft. The rotor is guided by two identical, liquid-lubricated slide bearings. The stator winding of the motor is separated from the rotor chamber by means of a thin stator liner. The partial flow for cooling the motor and lubricating the slide bearings will be deverted at the periphery of the impeller and, after having passed through the motor, is recirculated through the hollow shaft to the suction side of the impeller. This design is suitable for the delivery of uncritical liquids at low vapour pressures.

Single-stage, Normal-suction design, Liquefied gas design, Dimensions and performance curves in accordance with EN 22858; ISO 2858. Explosion protection according to Directive 2014/34/EU inkl. EC-type-examination certificate. Marking: II 2 G Ex de IIC T1 to T6 (*).

Single-stage. Normal-suction design. High-temperature design with plate heat exchanger. Dimensions and performance curves in accordance with EN 22858; ISO 2858. Explosion protection according to Directive 94/9/EC, inkl. EC-type-examination certificate

Single-stage. Normal-suction design. High-temperature design with tubular cooler. Dimensions and performance curves in accordance with EN 22858; ISO 2858. Explosion protection according to Directive 94/9/EC , inkl. EC-type-examination certificate

Single-stage Normal-suction design, High-temperature design without external cooler, Dimensions and performance curves in accordance with EN 22858; ISO 2858, Explosion protection according to Directive 2014/34/EU inkl. EC-type-examination certificate. Marking: II 2 G Ex de IIC T1 to T3 (*).

Canned motor pumps are characterised by a compact, integrated unit without mechanical seal. The motor and pump form a unit with the rotor and the impeller fitted onto a common shaft. The rotor is guided by two identical, medium-lubricated slide bearings. The stator on the drive motor is separated from the rotor space using a thin stator liner. The rotor cavity itself, along with the hydraulic section of the pump, create a combined cavity which needs to be filled with pumping medium before commissioning. The heat loss from the motor is carried off by a partial flow between the rotor and the stator. At the same time, the partial flow lubricates both slide bearings in the rotor cavity. Both the can, which is a hermetically sealed component, and the motor casing are used as a safety containment. Because of that, canned motor pumps always ensure highest safety level when conveying dangerous, toxic, explosive and valuable media.

Very high pressure differences with compact design can be achieved with this set in which the stages are arranged on both sides of the canned motor. The total quantity pumped flows through the canned motor and at the same time carries away the motor heat losses. Since, as a result, no heated part of the delivery flows back to the suction side considerably more stable NPSH values are produced in the part load range. Aggregates of Tandem design can therefore be used for considerably smaller pumping capacities, than pumps of single-stage design.

Single-stage, Normal-suction design, Design for high system pressures, Explosion protection according to Directive 2014/34/EU , inkl. EC-type-examination certificate, Marking: II 2 G Ex de IIC T1 to T6 (*).