B35TM2x140/1P-SC-S 2x2"(54)+2x2 1/2"(54)

This is the 140-plate B35T: SWEP designation B35TM2x140/1P-SC-S 2x2"(54)+2x2 1/2"(54). The digit after the plate letter (M2) tracks port size and port centre distance rather than heat transfer, so on a replacement it is the field that decides whether the unit lines up with the existing pipework. Reading the string: /1P is single pass; -SC is 316/316L stainless steel plates joined with copper. The closing S is the pressure class: 31 bar at 155 C. The connection field reads 2x2"(54)+2x2 1/2"(54). The B35T plate pack measures 393 x 243 mm (15.47 x 9.57 in) on 324 x 174 mm port centres, and by SWEP's published weight formula a 140-plate unit comes to about 44.4 kg (97.8 lb) dry. The frame is published to 27 m3/h (118.88 GPM) - a port limit rather than a design flow. If the flow on either side would exceed the published ceiling, the answer is a larger frame, not more plates on this one.