Alfa-laval Thermal Ab

Alfa Laval Corporate Ab

Alfa Laval Corporation Ab

Jarl A Andersson

Jan-Ove Bergqvist

Ralf Erik Blomgren

Mats Nilsson

Nils-Ake Jonsson

Leif Hallgren

Lennart Edso

A heat transfer plate for a plate heat exchanger has a heat transfer portion ( ) having elevations and depressions ( ), a first port portion (G), a second port portion (H), first sealing portions ( ), and second sealing portions ( ). The plate has a symmetry line (S), which extends from a first edge ( ) to a second edge ( ) of the plate and in relation to which the plate's heat transfer portion, sealing portions and ports to be passed by each of the heat transfer fluids are symmetrically arranged. The elevations and depressions ( ), are located in such manner relative to the symmetry line (S) that when two identical plates are brought to abut against each other&mdash;one of the plates being rotated through 180 degrees about the symmetry line (S)&mdash;the elevations ( ) on the plates will form distance means between the plates in a large number of positions distributed over the heat transfer portions ( ) of the plates.

Heat transfer plate and plate pack for use in a plate heat exchanger

A plate heat exchanger includes a package of heat transfer plates. The heat transfer plates are provided with inlet ports therethrough forming an inlet channel through the package. A sealing means is arranged between the heat transfer plates and forms, together with the heat transfer plates, a first flow passage for one fluid in every second plate interspace and a second flow passage for a heating fluid in each of the remaining plate interspaces. The inlet channel communicates with each first flow passage through at least one inlet passage while being blocked from communication with each second flow passage by part of the sealing means located in a first sealing area that extends around the inlet channel. Every two adjacent heat transfer plates which delimit the first flow passage have an essentially tight surface abutment against each other in a second sealing area. The inlet passage is delimited by at least one of the two adjacent heat transfer plates between its inlet port and the first sealing area.

Plate heat exchanger

Welded plate heat exchanger

Permanently joined plate heat exchanger

Plate evaporator

A plate heat exchanger especially adapted for viscous fluids or fluids containing fibers has spacing means extending above the normal corrugations thus widening the normal interplate channels and the inlets and outlets to and from said channels are formed by juxtaposing the plates containing ports forming said inlets and outlets to give the maximum throughflow.

In a plate heat exchanger having a frame plate and a pressure plate, at least one of these plates has holes for flow of the heat exchanging media to and from respective passages in the pack of heat exchange plates. Each of these holes has a lining of corrosion-resistant metal comprising a hollow cylinder with thin flanges at its opposite ends engaging opposite sides of the frame plate or pressure plate. One of these flanges has a seamless connection with the hollow cylinder and is sealingly compressed between a heat exchange plate and an undepressed surface of the inner side of the adjacent frame plate or pressure plate. Lining of the hole is effected by plastically deforming a metal disc into a hollow cylinder with a flange at one end, inserting the other end of the cylinder through the hole to engage the flange with said undepressed surface, and then providing said other end of the cylinder with a flange engaging an undepressed surface of the outer side of the frame or pressure plate.

Gasket arrangement for a plate heat exchanger

Heat exchanger plate

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Lund, Sweden

Jarl A Andersson