SWEP F200T

Plate material and catalogued purpose, not size or flow. All four are 525 x 243 mm with a 192.41 GPM ceiling. The F200T and P200T use 304 stainless plates; the B200T uses 316/316L; the V200T uses 316 channel plates with 304 cover plates. All are copper brazed.

The F200T and P200T are both described as high-performance evaporators with long thermal length, and the V200T as an evaporator optimized across many refrigerants. Since the published data does not make them interchangeable, replace like for like: quote the prefix on the nameplate. If the water is hard on 304, tell us and we will confirm whether a 316 sibling suits the same position.

SWEP's formula is 9.45 kg plus 0.42 kg per plate (20.84 lb plus 0.926 lb per plate). A 50-plate unit comes to about 30 kg (67 lb); a full 250-plate unit to about 114 kg (252 lb), before the refrigerant and water inside it.

At those weights the unit needs a floor stand or a support bracket under the plate pack, with the load taken by the cover plates. Solder connections in particular must carry nothing: a brazed joint on copper tube is not a structural member, and a unit hung from its piping will eventually crack a joint. Plan the lift before the old unit comes out.

It is the letter after the material code. In SWEP's example, F200TH/1P-NC-S, NC is 304 plate with copper braze and S is the pressure class. S is the general class - 31 bar at 155 C - used across a wide variety of applications.

Treat that as a category, not the rating of the unit in front of you; the stamped figures on the nameplate govern. The point to check on a replacement is that the new unit's class is not lower than the old one's. A high-pressure refrigerant circuit may have been built with an M-class unit, up to 45 bar at 135 C and fatigue tested, and an S-class unit is not a substitute there. Pressure Classes lists the letters.

Because it sets how much refrigerant the evaporator holds. SWEP publishes a channel volume of 0.241 for each side of the F200T; multiply by the number of channels on the refrigerant side and you have the internal volume the charge has to fill.

That matters in two places. On charge-limited systems - flammable or high-cost refrigerants - the evaporator's hold-up is part of the charge calculation, and adding plates adds volume. On the water side, low hold-up means the unit responds quickly to load changes, which is good for control but leaves little thermal mass to ride through a flow interruption. A brazed evaporator reaches freezing conditions faster than a shell-and-tube with the same duty.

Chemically, with the unit in place. Isolate the fouled side, connect a circulation pump and tank, and run the cleaning solution backward through the channels so loosened deposits leave the way they came in. Flush until clear and neutralize before returning to service.

Choose a cleaner compatible with 304 stainless and copper braze, and avoid chloride-bearing acids: 304 is the less forgiving of the stainless grades where chlorides are concerned. Fit isolation valves and cleaning tees when the new unit goes in, because retrofitting them later means cutting soldered lines.

Start with what can be measured: a 525 x 243 mm outline with port centres of 448.5 x 163.5 mm (17.66 x 6.44 in) and solder connections on every port. The port centres are the useful figure, because other models share the outline.

Then count the plates along the edge of the pack and note each connection size. A stamped article number sometimes survives on the cover plate when the label does not. What measurement cannot tell you is the plate material or the pressure class, so pass along what the unit does - the refrigerant, the operating pressures, the machine it came from - and we will confirm the designation from the duty.

For a replacement, the full designation from the nameplate and the SWEP article number if present. Together they fix the plate count, pass arrangement, material, pressure class and connections, and nothing else is required.

Without a complete nameplate, send the plate count, the four connection sizes, the refrigerant, and a photo of the unit installed. For a new selection we need the duty instead: both fluids, flow rates, inlet and outlet temperatures, evaporating temperature, and the allowable water-side pressure drop. Say so if the loop runs on glycol, with the concentration. Availability is confirmed with the quote - Request a Quote takes all of it in one form.

These models are catalogued alongside the F200T. Each has its own page with its dimensions, materials and part numbers.

SWEP B200T - Dual-over-two-pass on the 525 x 243 mm frame.

SWEP DB200 - True Dual brazed plate condenser for chillers and heat pumps, 525 x 243 mm, up to 202 plates.

SWEP DP200 - True Dual brazed plate evaporator for chillers and heat pumps, 525 x 243 mm, up to 202 plates.

SWEP DV200 - True Dual brazed plate evaporator for chiller and heat pump applications, 525 x 243 mm.

SWEP P200T - Brazed plate evaporator with long thermal length, 525 x 243 mm, up to 250 plates, solder connections.

SWEP V200T - Evaporator on the B200T frame, 525 x 243 mm, up to 250 plates, 192.41 GPM max flow.