A piston with an integrated heat exchanger comprises a seal, a piston hub and a piston rod. The piston hub is further provided with a coolant reservoir and an outlet nozzle at its lateral surface. The heat exchanger integrated into the piston hub and/or the piston hub include a coolant manifold, a coolant passage communicating thereto, and a plurality of channels connecting to the coolant manifold and extending radially to the annulus. Said heat exchanger provides enhanced efficiencies of heat-exchange and debris-flushing.

Proposing a versatile apparatus that can be adapted to carry out most fluid handling operations practiced in industrial chemistry. It comprises a capsule in which a piston is moving from side to side while rotating; the piston having a set of holes to control fluid passage through a proper dynamics for opening and closing these holes. Used for in pipe pumping, pipe-reactors and pipe-separators, serving as a Lego-like building block to represent a large variety of full-fledged chemical processes.