Magnetic Drive

G A

ABCE GH D F I

C

The Concept

canister’s voids

F

are filled with the liquid handled by the pump.The

C

and rotate the inner drivenmagnets The driven magnets

A

are connected to the drivemagnets

A

,turning the pump shaft androtor.Liquid is contained in the O-ring sealed canister,fixed in place by the bracket rotor shaft

B

,all housed inside the

G

are mounted in a housing

H

containment canister

C

,which is sealed to the outside of the canister,and this housing isconnected to the motor or other driver.As the driver turns the outer drive magnets

I

,which close couples to the motor or a bearing carrier. pump casing

D

by an O-ring

E

.The

G

,magnetic forces pass through the stationarycanister cooling system

The Engineering

The 855 Series uses advanced engineeringconcepts not found in previous Viking mag drives or in any other magnetically driven industrial gear pump.•Exceptional rotor shaft support is providedby a long spread between the rear bushing

1

,and the front bushing

2

.This design contributes to the 200 psi pressure capability and extends rotor and bushing life by providing better alignment.•Unique rotor positioning system uses

4

ensures continuous fluid flow throughout the canister, removing heat generated by magnetic eddy currents, and protecting both the pump and temperature-sensitive liquids. Internal channels from the discharge (high pressure) side of the pump allow flow through a channel in the bushing into the canister,through the hollow rotor shaft and idler pin,discharging to the suction (low pressure) side.Cooling flow is reversed when the pump’s flow is reversed. thrust washers

3

on both sides of thefront bushing.They fix the rotor in position regardless of pressure variations or upset conditions on the suction or discharge side.Locking the rotor’s axial position contributes to the pump’s ability to handle short-term run-dry, and it allows the pump to be operated in either direction.•Simple,effective

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4 Viking Mag Drive Series 855