B16Hx70/1P-SC-S 4x1 1/4"(45)

This is the 70-plate B16: SWEP designation B16Hx70/1P-SC-S 4x1 1/4"(45). 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. The closing S is the pressure class: 31 bar at 155 C. The connection field reads 4x1 1/4"(45). 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 70-plate unit comes to about 9.9 kg (21.8 lb) dry. The frame is published to 16.9 m3/h (74.41 GPM) - a port limit rather than a design flow. Check the connection field seperately from the plate count: two units can be consistent in every other field and still not pipe up.