B15THx20/1P-SC-Y 4x3/4"

B15THx20/1P-SC-Y 4x3/4" designates a SWEP B15T 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. The /1P-SC fields read as single pass, with 316/316L stainless steel plates and a copper braze. Connections are listed as 4x3/4", in port order. The B15T plate pack measures 468 x 76 mm (18.43 x 2.99 in) on 432 x 40 mm port centres, and by SWEP's published weight formula a 20-plate unit comes to about 3.3 kg (7.3 lb) dry. Maximum flow for the frame is 4 m3/h (17.61 GPM); that is a ceiling for the ports, not a duty point. If the flow on either side would exceed the published ceiling, the answer is a larger frame, not more plates on this one.