What types of pumps are offered on PolyScience circulators?
The two types available on PolyScience circulators are a pressure (simplex) pump and a pressure/suction (duplex) pump. The simplex pressure pump is typically used to push controlled temperature fluid through tubing, into the closed loop, and back into the reservoir. There is positive pressure throughout the circulating system. With a duplex pressure/suction pump, the pump produces pressure to the external closed loop application, and the liquid is returned to the circulator by the suction side of the pump. This duplex pump is suitable for maintaining liquid level in an open bath because it can return fluid to the circulator.
