SWEP DS400

Vertically, with the plates upright. The DS400 is an evaporator, and two-phase duty depends on gravity to keep liquid and vapor distributed across the plate pack; laid on its back or side, the unit loses capacity and superheat control becomes erratic.

Pipe the water counter-current to both refrigerant circuits - that arrangement gives the closest approach. Then support every line independently so the connections carry no load. Compressor pulsation transmitted through unsupported pipework is what fatigues braze joints. See Mounting and Piping for the layout.

It gives the model and the plate count, and nothing else. DS400 is the model and size - D for True Dual, S for the plate, 400 for the frame size. The x130 is the number of plates, which fixes the depth, the weight and the capacity.

A full nameplate string carries more fields after that: the pass arrangement following a slash, a material code, a pressure class letter, and the connections in port order. For this model the published construction is 316/316L plates with copper braze, which is the SC material code. The class letter and the connection string have to come off the nameplate itself. The Model Number Guide walks through each field.

No. The 76 m3/h (about 335 GPM) figure is a ceiling set by the ports, not a design flow. A unit running near it has high port velocity and high water pressure drop, and the pump usually decides the matter before the exchanger does.

Note also that the ceiling is lower than the 365 GPM published for the B400T, S400T, P400T and V400T on the same footprint, so a flow that suited one of those may not suit a DS400. When the water flow is close to the limit, the next step is the DS500 - the same 304 mm width at 980 mm tall, published at 365 GPM.

Start with what the unit itself shows. Measure the height and width, the port centre distances and the depth of the plate pack, and count the plate edges along one side. Count the refrigerant connections too: two separate refrigerant circuits confirm a True Dual model.

What the tape measure cannot settle is the letter after the D. The DS400, DP400, DV400 and DB400 all measure 694 x 304 mm, and the DB400 is a condenser. Any surviving fragment of the model line, plus the chiller make and model, closes that gap. Send us photos of the plate and the connections and we will confirm the designation before quoting.

These models are catalogued alongside the DS400. Each has its own page with its dimensions, materials and part numbers.

SWEP B400T - Asymmetric pass arrangement - two passes one side, one the other.

SWEP DB400 - True Dual brazed plate condenser for flexible chillers and climate control, 694 x 304 mm.

SWEP DP400 - True Dual brazed plate evaporator for flexible chillers and climate control, 694 x 304 mm.

SWEP DV400 - True Dual brazed plate evaporator, 694 x 304 mm, up to 282 plates, Victaulic and solder connections.

SWEP P400T - Copper-brazed 316/316L evaporator on the B400T frame, up to 280 plates, 365.44 GPM max flow.

SWEP S400T - High-capacity chiller evaporator on the B400T frame, 316/316L plates, copper brazed.

SWEP V400T - Copper-brazed 316/316L plate heat exchanger on the B400T frame for high-capacity chiller duty.

SWEP DB500 - True Dual brazed plate condenser with two refrigerant circuits, 980 x 304 mm, up to 298 plates.

SWEP DS500 - True Dual brazed plate evaporator with two refrigerant circuits, 980 x 304 mm, up to 298 plates.