B427Hx180/1P-SC-S / 4xDN100C cs

This is the 180-plate B427: SWEP designation B427Hx180/1P-SC-S / 4xDN100C cs. 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 connections. The B427 plate pack measures 694 x 304 mm (27.32 x 11.97 in) on 567 x 179 mm port centres, and by SWEP's published weight formula a 180-plate unit comes to about 136.7 kg (301.4 lb) dry. The frame is published to 155.5 m3/h (684.65 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.