B80Hx86/1P-NC-S 4x1 1/4"

This is the 86-plate B80: SWEP designation B80Hx86/1P-NC-S 4x1 1/4". 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-NC fields read as single pass, with AISI 304 stainless steel plates and a copper braze. The closing S is the pressure class: 31 bar at 155 C. It is catalogued with 4x1 1/4" connections. The B80 plate pack measures 526 x 119 mm (20.71 x 4.69 in) on 470 x 63 mm port centres, and by SWEP's published weight formula a 86-plate unit comes to about 16.7 kg (36.9 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 seperate this build from its neighbours in the series.