B35TH0x90/1P-SC-S 4x2"

Part number B35TH0x90/1P-SC-S 4x2" is the SWEP B35T frame carrying 90 plates. The digit after the plate letter (H0) 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 4x2". 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 90-plate unit comes to about 31.6 kg (69.6 lb) dry. Maximum flow for the frame is 27 m3/h (118.88 GPM); that is a ceiling for the ports, not a duty point. If the flow on either side would exceed the published ceiling, the answer is a larger frame, not more plates on this one.