B16Hx50/1P-SC-S 4x1 1/4"(27)

This is the 50-plate B16: SWEP designation B16Hx50/1P-SC-S 4x1 1/4"(27). Its H plates are the high-theta pattern - the choice when the leaving temperature is tight and the pump has head to spare. 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. Connections are listed as 4x1 1/4"(27), in port order. The B16 plate pack measures 376 x 119 mm (14.8 x 4.69 in) on 320 x 63 mm port centres, and by SWEP's published weight formula a 50-plate unit comes to about 7.5 kg (16.5 lb) dry. Maximum flow for the frame is 16.9 m3/h (74.41 GPM); that is a ceiling for the ports, not a duty point. Where a nameplate is worn, the plate count and the connection sizes are usually enough to separate this build from its neighbours in the series.