SWEP B200T

SWEP publishes the B200T with PED, UL and KHK approvals. What matters on site is the nameplate on the delivered unit: its stamped design pressure and temperature have to cover the system's relief setting and its highest operating temperature.

Check the pressure class before ordering a replacement. The builds we have on file are S and M. S is the 31 bar at 155 C category; M goes up to 45 bar at 135 C and is fatigue tested for refrigerants such as R410A. Putting an S unit where an M came out is the mistake that fails inspection, or fails later in service. Pressure classes explains the letters.

Start with the letters in front of the number. F200T, P200T and V200T are evaporator models built on the same 525 x 243 mm plate, and DB200, DP200 and DV200 are True Dual units with a lower flow ceiling. A missing first letter can turn a correct quote into the wrong product.

Next, the pass field. D2P is two circuits over two passes, while 1P is single pass, and the two are piped differently.

The connection string helps when the rest is gone. Two of our catalogued builds read 35.1 + 54.3&60 solder on one side with 2x2 1/2 in on the other; the plain version is 2 in all round. Copy any bracketed suffix such as (54) exactly as stamped.

Each channel holds 0.241 dm3 on either side. A pack has one channel fewer than it has plates, split about evenly between the two sides, so a 150-plate B200T holds roughly 18 liters per side. On a D2P build the refrigerant side is divided again between the two circuits.

On the refrigerant side that volume is charge. It counts toward the system charge and affects how much liquid has to be managed at shutdown. On the water or glycol side it is thermal mass: a small volume responds quickly to a load change, and it also has very little heat to give up before it freezes if flow is lost. Use it for the glycol fill calculation too.

One with openings smaller than the published 1 mm particle limit, on the inlet of every water or glycol circuit. Anything larger than the limit can lodge at the channel entries and it does not come back out.

Blockage rarely shows as a sudden failure. A few channels plug, flow shifts to the others, and the pressure drop barely moves while capacity falls. On an evaporator the starved channels are where freezing starts.

Fit test ports across both the strainer and the exchanger.

These models are catalogued alongside the B200T. Each has its own page with its dimensions, materials and part numbers.

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 F200T - A copper-brazed 304 stainless evaporator with solder connections for chillers and heat pumps.

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.