B5THx10/1P-SC-M 4x3/4"&16(20)

B5THx10/1P-SC-M 4x3/4"&16(20) designates a SWEP B5T brazed plate heat exchanger with 10 plates in the pack. 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 M is the pressure class: up to 45 bar at 135 C, fatigue tested. Connections are listed as 4x3/4"&16(20), in port order. The B5T plate pack measures 193 x 76 mm (7.6 x 2.99 in) on 154 x 40 mm port centres, and by SWEP's published weight formula a 10-plate unit comes to about 1.0 kg (2.2 lb) dry. Maximum flow for the frame is 4 m3/h (17.61 GPM); that is a ceiling for the ports, not a duty point. Check the connection field separately from the plate count: two units can be consistent in every other field and still not pipe up.