B80Hx20/1P-SC-S 16+35.1+2x1 1/4"

B80Hx20/1P-SC-S 16+35.1+2x1 1/4" designates a SWEP B80 brazed plate heat exchanger with 20 plates in the pack. The H plate is the obtuse chevron: it gives the most heat transfer per plate and the most pressure drop, so it suits duties where approach temperature matters more than pump head. 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 16+35.1+2x1 1/4". 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 20-plate unit comes to about 5.9 kg (13.0 lb) dry. The frame is published to 16.9 m3/h (74.41 GPM) - a port limit rather than a design flow. Check the connection field seperately from the plate count: two units can be consistent in every other field and still not pipe up.