B439Hx360/1P-SC-S / 4xDN100C cs(54)

B439Hx360/1P-SC-S / 4xDN100C cs(54) designates a SWEP B439 brazed plate heat exchanger with 360 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. The connection field reads / 4xDN100C cs(54). 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 360-plate unit comes to about 336.1 kg (741.0 lb) dry. Maximum flow for the frame is 155.5 m3/h (684.65 GPM); that is a ceiling for the ports, not a duty point. It is not necessary to send drawings for a like-for-like replacement - the string above carries the whole build.