B12Hx40/1P-SC-S 2x1 1/4" INT HEX(27)+2x1"INT HEX(27)

B12Hx40/1P-SC-S 2x1 1/4" INT HEX(27)+2x1"INT HEX(27) designates a SWEP B12 brazed plate heat exchanger with 40 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 2x1 1/4" INT HEX(27)+2x1"INT HEX(27). The B12 plate pack measures 287 x 117 mm (11.3 x 4.61 in) on 234 x 63 mm port centres, and by SWEP's published weight formula a 40-plate unit comes to about 4.6 kg (10.2 lb) dry. The frame is published to 16.9 m3/h (74.41 GPM) - a port limit rather than a design flow. If the duty has changed since the original equipment went in, send the flows and both inlet conditions and we will confirm whether this configuration still fits.