AlfaRex Welded Plate Heat Exchangers

The AlfaRex is the result of combining well-proven heat exchanger technology with modern laser welding technology. Plates with the traditional herringbone pattern are laser-welded together to form a plate pack in which both media are in full counter-current flow. The herringbone pattern creates channels with high fluid turbulence which increases thermal efficiency and minimizes the risk of fouling.

The AlfaRex was the first full-size totally welded yet compact unit which could perform in temperatures ranging from -50 to 350 C (-58 to 660 F) and design pressure of up to 40 Bbarg (580psig). The alfaRex, presently available in six types of plate material, is now capable of handling flowrates up to 800m3/h (35 Usgpm). Plates in exotic materials and higher capacities extend the potential of the AlfaRex to new duties in the petrochemical industries and other chemical processing industries.

welded plate heat exchangers The compact alternative

A typical AlfaRex installation takes up only one-sixth of the floor space and weighs only one-sixth of a comparable shell-and-tube heat exchanger for the same duty.

Media flow in true countercurrent flow which is optimal for heat transfer, particularly for heat recovery duties. Per units of area, countercurrent flow achieves 20 percent higher heat transfer values than cross flow. This, in turn means that AlfaRex can perform the same duty with considerably less heat transfer area and, therefore, at less cost.

A low hold-up volume not only allows more accurate process control but improves operational safety when handling hazardous media.

Pressure-Temperature Rating
Operating Temperatures:	-50 to 350 C (-58 to 660 F)
Operating Pressures:	up to 40 barg (580 psig)
Size Range

Material of Construction
Plate materials:	AISI 316 SMO
	Titanium Palladium-stabilised titanium Hastelloy C276 Nickel Other materials upon request

Typical Applications:

Offshore platforms

cooling of hydrocarbon gas, condensate crude oil
heating of condensate, crude oil
TEG interchanging

Caustic soda production - heating and cooling duties in the evaporation of sodium hydroxide

Petrochemical Industries
Production of various chemicals such as caprolactam, ethylene oxide and polyois
Solvent recovery
Reactor temperature control, batch heating
Steam Applications

Vegetable oil refining - interchanging, heating and cooling of high temperature oil in deodorisation and hydrogenation
Refrigeration - evaporation and condensing of ammonia and carbon dioxide in heat pump and absorption systems
Power plants - preheating of feed water

welded plate heat exchangers Compaplate Welded Plate Heat Exchanger:

The Compaplate Wide Gap Welded plate heat exchanger is a compact welded plate heat exchanger that is technologically advanced, and efficient. The wide gap design makes it ideal for applications where there is one 'dirty' stream and one clean stream.

The Compaplate is fully accessible for cleaning by water lancing or hydro-blasting on the dirty side.

Unique Features of Compaplate Welded Plate Heat Exchanger

True Free Flow design on the wide gap side. There are no mounting or supporting studs on the heat exchanger allowing for a clear passage through the heat exchanger
The efficiency is further enhanced by making the flow path through the heat exchanger a turbulent one. The heat transfer surface comprise of dimple-shaped plate coils which has an undulatig surface. This causes a turbulent flow as well as a high film coefficient on the sealed side due to a thin fluid flow
Gaps on the process side can vary depending on the application or service
There are no inter-plate gaskets allowing for more aggressive applications and higher temperature/pressure ratings

welded plate heat exchangers The Wide gap side is totally accessible for cleaning and inspections, without disturbing any existing piping to the heat exchanger

Pressure-Temperature Rating:

Maximum Pressure Rating of 150 psig and 450 Degrees F

Size Range

Widths can range from 12"-48" with lengths ranging from 71" -142"

Material of Construction

Plates - Stainless Steel 316L, Stainless Steel 304L, Carbon steel
Carbon Steel Frames

Common Applications

White Water Heat Recovery
Sludge Heater
Slurry Coolers
Streams containing large suspended particles or solids.

Valutech Inc.
70 Esna Park Drive, Unit 3
Markham, Ontario, Canada
L3R 6E7

Tel: 905.940.0961
Fax: 905.940.0983
Email: info@valutechinc.com