B8LASHx40/1P-SC-M 4x3/4"&16

B8LASHx40/1P-SC-M 4x3/4"&16 designates a SWEP B8LAS 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 M is the pressure class: up to 45 bar at 135 C, fatigue tested. The connection field reads 4x3/4"&16. The B8LAS plate pack measures 317.7 x 76.2 mm (12.51 x 3.00 in) on 278 x 40 mm port centres, and by SWEP's published weight formula a 40-plate unit comes to about 3.2 kg (7.1 lb) dry. The frame is published to 4 m3/h (17.61 GPM) - a port limit rather than a design flow. Check the connection field separately from the plate count: two units can be consistent in every other field and still not pipe up.