B20Hx40/1P-NSC-M 9.65+16+2x1"&22U

Part number B20Hx40/1P-NSC-M 9.65+16+2x1"&22U is the SWEP B20 frame carrying 40 plates. 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; -NSC is 316 channel plates, 304 cover plates plates joined with copper. The closing M is the pressure class: up to 45 bar at 135 C, fatigue tested. Connections are listed as 9.65+16+2x1"&22U, in port order. The B20 plate pack measures 324 x 94 mm (12.76 x 3.70 in) on 268.2 x 39 mm port centres, and by SWEP's published weight formula a 40-plate unit comes to about 3.9 kg (8.5 lb) dry. The frame is published to 9.7 m3/h (42.71 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.