B80Hx70/1P-SC-M 2x35.1(27)+2x1 1/4"&28U(27)

This is the 70-plate B80: SWEP designation B80Hx70/1P-SC-M 2x35.1(27)+2x1 1/4"&28U(27). Its H plates are the high-theta pattern - the choice when the leaving temperature is tight and the pump has head to spare. The /1P-SC fields read as single pass, with 316/316L stainless steel plates and a copper braze. The closing M is the pressure class: up to 45 bar at 135 C, fatigue tested. Connections are listed as 2x35.1(27)+2x1 1/4"&28U(27), in port order. The B80 plate pack measures 526 x 119 mm (20.71 x 4.69 in) on 470 x 63 mm port centres, and by SWEP's published weight formula a 70-plate unit comes to about 14.1 kg (31.1 lb) dry. The frame is published to 16.9 m3/h (74.41 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.