Alfa Laval Alfa Laval M6 and M10
Alfa Laval M6 and M10 gasketed plate heat exchangers from the Industrial line, with a design pressure of up to 25 bar and DN50 (M6) or DN100 (M10) connections.
M6 and M10 are gasketed plate heat exchangers from Alfa Laval's Industrial line, used in almost every industrial sector. The plates are offered in single or double wall configuration, the latter as an additional measure against fluid mixing, and the configuration is flexible: the heat transfer area can be changed. The M6 has DN50 connections and frames for 10, 16 or 25 bar, while the M10 has DN100 connections and an additional frame for 6 bar.
The frame type is read from the name: M6-FM, M6-FG, M6-FD, and M10-FL, M10-FM, M10-FG, M10-FD respectively, where the letters F indicate the frame model (FM for 10 bar, FG for 16 bar, FD for 25 bar on M6 and M10, FL for 6 bar on M10). The plates have their own types: M6, M6-M, M6-MX (diagonal flow), M6-MD, M6-MG (hygienic Gemini, double wall) for M6 and M10-B, M10-M, M10-MX, M10-BD for M10. For a quotation, please send us the unit nameplate or the calculation sheet, together with the fluids, temperatures and flow rates; we confirm the type, materials and availability in the quotation.
Models and codes
| Code | Note |
|---|---|
| M6-FM | M6 frame for 10.0 barg at 180 °C (PV code pvcALS), EN 1092-1 DN50 PN10 connection; height 920 mm, width 320 mm. |
| M6-FG | M6 frame for 16.0 barg at 180 °C (pvcALS), EN 1092-1 DN50 or DN65 PN16 connections; height 920 mm, width 320 mm. |
| M6-FD | M6 frame for 25.0 barg at 180 °C (pvcALS), EN 1092-1 DN50 PN25 connection; height 940 mm, width 330 mm. |
| M10-FL | M10 frame for 6.0 barg at 130 °C (pvcALS), EN 1092-1 DN100 PN10 connection. |
| M10-FM | M10 frame for 10.0 barg at 180 °C (pvcALS), EN 1092-1 DN100 PN10 connection; height 1084 mm, width 470 mm. |
| M10-FG | M10 frame for 16.0 barg at 180 °C (pvcALS), EN 1092-1 DN100 PN16 connection; height 1084 mm, width 470 mm. |
| M10-FD | M10 frame for 25.0 barg at 180 °C (pvcALS); EN 1092-1 DN100 PN25 connection (in the leaflet, for the PED variant) or ASME NPS 4; height 981 mm, width 470 mm. |
Key specifications
| Maximum design pressure M6 (PV code pvcALS: FM / FG / FD) | 10.0 / 16.0 / 25.0 barg |
|---|---|
| Maximum design pressure M10 (PV code pvcALS: FL / FM / FG / FD) | 6.0 / 10.0 / 16.0 / 25.0 barg |
| Maximum design temperature (pvcALS) | 180 (130 for M10-FL) °C |
| Free channel, M6 plates | 2.0 (M6); 3.0 (M6-M, M6-MX, M6-MD, M6-MG) mm |
| Free channel, M10 plates | 2.6 (M10-B, M10-BD); 4.0 (M10-M, M10-MX) mm |
| Materials for M6 plates | 304/304L, 316/316L, 904L, 254, C-22, C-276, C-2000, 59, G-30, 825, Ni, Ti, TiPd |
| Materials for M10 plates | 316/316L, 316Ti, 904L, 254, C-22, C-276, C-2000, D-205, B-3, G-30, 400, 625, 825, Alloy 33, Ni, Ti, TiPd |
| Field gaskets | NBR, EPDM, FKM, HeatSeal, plus CR (M6) or Q (M10) |
| Frame and pressure plate | carbon steel, epoxy painted |
| Flange connections | M6: DN50 / DN65 (PN10, PN16, PN25), ASME NPS 2, JIS; M10: DN100 (PN10, PN16, PN25), ASME NPS 4, JIS |
The Alfa Laval product leaflets for M6 (CHE00071-4) and M10 (CHE00072-5) are from the 2020 edition; an M line 6 leaflet of April 2026 shows that the name M6 is still documented by the manufacturer, and we confirm the status of each type in the quotation.
Frequently asked questions
What do FM, FG and FD mean in the frame name?
They are the frame models, each with its own maximum design pressure. On both series FM is for 10.0 barg, FG for 16.0 barg and FD for 25.0 barg (PV code pvcALS), and the M10 also has FL for 6.0 barg. The pressure and temperature for other vessel codes, such as ASME or PED, are given separately in the leaflet table and may differ (for example, with ASME).
What data do I send for a quotation to replace plates or the unit?
The unit nameplate or the calculation sheet, the fluids on both circuits, inlet and outlet temperatures, flow rates, working pressure and the material of the plates and gaskets used at present. When ordering, the lead time is usually 1–4 weeks; we confirm availability and the exact lead time in the quotation.
Can I have double wall plates?
Yes, the M6 and M10 leaflets show double wall variants: M6-MD and M6-MG (hygienic Gemini) for the M6, M10-BD for the M10. These are chosen as an additional precaution against fluid mixing; the exact type is chosen according to the fluids and pressure.
Other Alfa Laval series
The page presents the data from the M6 and M10 product leaflets of the Industrial line: pressures, temperatures, materials and frame dimensions. The heat transfer area, number of plates and thermal performance are calculated for the application, and other Alfa Laval lines (for example T2 or the hygienic and semi-welded variants) have separate leaflets.
Updated: 2026-11-12