B439Hx280/1P-SC-S / 4xDN100C cs(54)

B439Hx280/1P-SC-S / 4xDN100C cs(54) designates a SWEP B439 brazed plate heat exchanger with 280 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. The /1P-SC fields read as single pass, with 316/316L stainless steel plates and a copper braze. The closing S is the pressure class: 31 bar at 155 C. It is catalogued with / 4xDN100C cs(54) connections. The B439 plate pack measures 979 x 304 mm (38.54 x 11.97 in) on 854 x 179 mm port centres, and by SWEP's published weight formula a 280-plate unit comes to about 264.9 kg (584.1 lb) dry. The frame is published to 155.5 m3/h (684.65 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.