Chemicals

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Glandless Pumps

(ISO 2858 / DIN24256) - with permanent magnetic drive arrangement

Application

chemical and petrochemical industry, ideally suited to applications where the preventation of seal leakage is a requirement and particularly with volatile, high-tempered, hazardous or toxic liquids.

Design

horizontal, single stage, single flow volute casing centrifugal pump in back pull-out design. The closed impeller is provided with double curved blades. The torque required to operate the pump is transmitted via flexible coupling to the drive shaft which is supported in mainenance-free ball bearings. The drive shaft in turn has attached to it the external magnet carrier which is fitted permanent magnets. AN isolation shell separates the liquid chamber from the atmosphere. An inner manet carrier (fitted with permanent magnets) is located inside the isolation shell and supported in sleeve bearings which are lubricated by the pumpage. The inner magnet carrier transmits the motor torque, at synchronous speed, to the impeller which is attached to it. The pump casing ensures a perfectly sealed unit.

Connection

• Suction socket: axial

• Discharge socket: radial upwards

• flanges acc. to DIN PN 16 or 25

• (British standard or ANSI possible)

Temperature

• from -120C up to + 450°C

Capacity range

• up to 1000 m³/h

Delivery head

• up to 150 m

Materials

• Casing: spheroidal graphite iron, cast steel, many kinds of stainless steels and titan

• Impeller: spheroidal graphite iron, cast steel, many kinds of stainless steels and titan

• Isolation shell: NiMo16Cr16Ti

• Permanent magnets: depending on temperature

Driver

• electric motor B3

Direction of rotation

• CW

Bearings

• flexible coupling, spacer coupling

Power transmission

• on drive-side double ball bearings, grease lubricated

Lubrication systems

• on drive-side double ball bearings, grease lubricated

Due to the internal design of the liquid chamber a force-fed flushing arrangement is required to lubricate the sleeve bearings abd cool the area between the inner magnet carrier and isolation shell; therefore available are:

• internal lubrication

• internal filtered lubrication

• internal separate lubrication via pumping ring

• external lubrication