A pumping arrangement for a paint circulation system comprising a
reciprocating pump (13), and characterized by an alternating current
induction motor (15), a rotary-to-linear motion converter (16) coupling
the output of the induction motor (15) to a drive input of the pump (13),
an alternating current frequency inverter (24a) controlling said
induction motor, switch means (26) for reversing rotation of the
induction motor (15) at the ends of the stroke of the reciprocating pump
(13), and, a surge eliminator (28) communicating with the output side of
said pump (13) to augment the pressure in the circulation system during
stroke reversal of the pump.