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SECTION 1 GENERAL DESCRIPTION
1.0 Drive Assembly
Drive Assembly Main Components
1.01 How the Drive Works
The SiA Drive Assembly has been designed to give a reliable means of driving a reciprocating
chemical injection pump by means of electricity in general, and solar energy in particular.
The standard motive force of the Drive Assembly consists of a PMDC, BLDC or A.C. motor driving
through an integrally mounted gearbox. This gear-motor mounts directly to the drive case’s flange
mount and the drive shaft connects to the drive crank shaft via a keyed connection. The crank
shaft is supported either end by oversized sealed bearings so as to eliminate all overhung loads.
This greatly increases the life of the gear-motor’s gearbox.
By applying a rotary force to the end of the crank shaft, the force is transmitted to the pump by
way of the plunger adaptor, which is directly acting on the pump plunger.
Multiplex Drive Configuration
The SiA multiplex configuration works as described
above, with the added benefit of allowing combined or
multiple separate chemical flows in the one chemical
injection pump.
Liquid End Configurations
Simplex— One liquid end per drive case with Stroke
Adjustment.
Duplex— Two liquid ends per drive case without Stroke
Adjustment
Multiplex 2 Configuration
Duplex Configuration
Manual Stroke
Length Adjustor
Drive Case
Pump Adaptor
Bearings
Crank Shaft
Plunger Adaptor
Upper
Plunger Adaptor
Lower