Plate heat exchangers for refrigeration Product catalogue for semi-welded and all-welded plate heat exchangers

3 Inside view Semi-welded 4 General description 10 M6-MW FGR evaporator 11 M10-BW REF evaporator 12 M10-BW FT REF cascade 13 MK15-BW FGR evaporator 14 T20-BW FG evaporator 15 T20-MW FG evaporator 16 M6-MW FDR condenser 17 M10-BW REF condenser 18 M10-BW FDR condenser 19 MK15-BW FDR condenser 20 T20-BW FS condenser 21 T20-MW FS condenser 22 Standard connections All-welded (AlfaRex) 23 General description 25 TM10-B FDR 26 TM10-B FTR 27 TM20-B FFR 28 TM20-B FKR 29 TM20-B FNR This product brochure is a collection of general technical information about the Alfa Laval semi-welded plate heat exchanger...

General description - Semi-welded plate heat exchangers The channels for the refrigerant and the brine are sealed by laser welds and gaskets. SWPHE as an evaporator in a brewery installation. The complete range of Alfa Laval plates for SWPHE. Semi-welded plate heat exchanger The Alfa Laval semi-welded heat exchanger (SWPHE) alternates welded channels and traditional gasketed channels. The refrigerant flows in welded channels and the only gaskets in contact with the refrigerant are two circular porthole gaskets between the welded plate pairs. These gaskets are made from highly resistant materials,...

á á â â â á á á â â â á â â 5 General description SWPHE becomes more compact and request a lower filling of refrigerant for the same duty. Advantages The plate heat exchanger concept, with flow-through channels formed by corrugated plates and the heat transfer taking place through the thin plates, is an extremely efficient heat exchange technique. The turbulent flow, coupled with low fouling factors and high heat transfer coefficients, means that it is possible to operate with a small temperature difference in evaporating and chilled water temperatures. This in turn provides a good operational...

6 General description Due to flexible design, no damage will occur when freezing. Mechanical aspects and freezing The SWPHE is not sensitive to temperature shocks, and there is no vibration due to the small distance between the support points. There is no pressure retaining welds in the SWPHE. Due to the turbulent flow, freezing risks are small, but the flexible design will accommodate expansion, and no damage will be caused should freezing occur. Leak detection Intermixing of media is not possible with the double sealing. The diagonal gaskets form the weakest components, and any leak will occur...

7 Area / Plate m² 0.124 0.24 0.46 0.81 0.85 Volume / Channel l 0.40 0.63 1.27 2.34 3.67 Free channel mm 2.80 2.40 2.50 2.50 4.00 Frame and plate guide The low and high temperatures are gasket limited temperatures. The design pressure of the unit is limited to the frame. Models M6-MW M10-BW MK15-BW T20-BW T20-MW FGR / FG Max. design pressure/Test pressure Standard temperature Low temperature bar ºC ºC (FGR) 16/23 -10/120 -45/50 (FGR) on request on request on request (FGR) 16/23 -10/120 -45/50 (FG) 16/23 -10/120 -45/50 (FG) 16/23 -10/120 -45/50 FDR / REF / FS / FT Max. design pressure/Test pressure...

condenser desuperheater evaporator 2 evaporator 1 evaporator condenser evaporator evaporator 8 condenser desuperheater evaporator 2 evaporator evaporator evaporator condenser evaporator 2 evaporator 1 evaporator condenser evaporator evaporator condenser desuperheater evaporator 2 evaporator 1 evaporator condenser evaporator evaporator condenser desuperheater evaporator 2 evaporator 1 evaporator condenser evaporator evaporator Configurations Condenser and desuperheater arranged in the same frame. Two evaporators or condensers, also in different size, arranged in the same frame. Multipass evaporator...

9 0 20 40 60 80 100 120 140 -20 -40 bar abs °C NBR CR NBR CR NBRL T 25 0 20 40 60 80 100 120 140 150 -20 -40 5 10 15 20 30 bar abs °C HNBR CR NBRL T 25 0 20 40 60 80 100 120 140 -20 -40 5 10 15 20 30 bar abs °C CR NBRL T EPDM EPDM NBRL T HNBR NBRL T CR Saturation Saturation 110 * ** * ** **** FEPM FEPM *** 5 10 15 20 25 30 40 Gasket selection guide Refrigerant on welded side Refrigerant mixed with normal compressor oil – type mineral oil with low aromatic contents (synthetic oils have to be checked). For special operation cases like: • temporary high temperature changes • cleaning by CIP at high...

23 General description – All-welded plate heat exchangers The all-welded plate heat exchanger consists of a plate pack of herringbone patterned metal plates with portholes for passage of the two fluids. The heat transfer takes place through the thin plates in stainless steel, titanium or SMO and it is a highly efficient heat exchange technique. The AlfaRex TM10-B ammonia evaporator and condenser in a chiller heat pump system with ammonia as refrigerant installed in a Danish research institute. The system was built by Sabroe. The AlfaRex does not only influence on size and weight but owing to...

24 FDR Max. design pressure / Test pressure bar 36/51.5 on request Standard temperature °C -10/160 on request Design temperature °C -50/50 on request FTR Max. design pressure / Test pressure bar 43/61.5 on request Standard temperature °C -10/160 on request Design temperature °C -50/50 on request FFR Max. design press. / Test press. gasket side bar n/a 25/35.8 Max. design press. / Test press. welded side bar n/a -10/160 Design temperature °C n/a -50/50 FKR Max. design press. / Test press. gasket side bar n/a 40/57.2 Max. design press. / Test press. welded side bar n/a -10/160 Design temperature...

ERC00041EN 0609 Alfa Laval reserves the right to change specifications without prior notification © 2004 Alfa Laval Alfa Laval in brief Alfa Laval is a leading global provider of specialized products and engineered solutions. Our equipment, systems and services are dedicated to helping customers to optimize the performance of their processes. Time and time again. We help our customers to heat, cool, separate and transport products such as oil, water, chemicals, beverages, foodstuffs, starch and pharmaceuticals. Our worldwide organization works closely with customers in almost 100 countries to...