Abstract: The invention relates mainly to a pumping system (1) which comprises an alternating distribution device comprising at least one shut-off device (7) comprising four mobile shut-off members (70-73) for shutting off first and second inlets (E1, E2; E1a, E2a) and first and second outlets (S1, S2; S1a, S2a) of the pumping system (1) and at least one trigger (8, 9) configured to actuate said shut-off members (70-73) between two positions, respectively a shutting-off position and an open position, which alternating distribution device can be actuated between a first arrangement associated with a first fluid distribution cycle and a second arrangement associated with a second fluid distribution cycle.

Abstract: The invention relates mainly to a pumping system (1) which comprises an alternating distribution device comprising at least one shut-off device (7) comprising four mobile shut-off members (70-73) for shutting off first and second inlets (E1, E2; E1a, E2a) and first and second outlets (S1, S2; S1a, S2a) of the pumping system (1) and at least one trigger (8, 9) configured to actuate said shut-off members (70-73) between two positions, respectively a shutting-off position and an open position, which alternating distribution device can be actuated between a first arrangement associated with a first fluid distribution cycle and a second arrangement associated with a second fluid distribution cycle.

Abstract: A heat exchanger that is applicable to a pump and a system where a plurality of tubular elements or cores, each comprising a support cylinder or half-cylinder and at least one curved heat exchange plate. Each plate separating a first cavity from a second cavity where the first cavity contains a liquid and the second cavity receiving a coolant causing the thermal expansion or contraction of the plate. The heat exchanger according to the invention makes it possible to withstand high mechanical stresses. This design makes it better to withstand high pressures despite a large diameter of the cylindrical heat exchange plates without an increase to the thickness of these plates. The pressure being exerted on the tubular elements is primarily radially, more particularly from the outside to the inside for the thinnest cylindrical heat exchange plate in contact with the cavity containing cold coolant or air.