SWEP B224

High-flow liquid-to-liquid duty where pressure drop is the governing constraint. It is built for moving a lot of treated water through large ports without spending pump head on it.

It does not belong on a low-flow duty that needs a very close approach, because that work wants thermal length more than port area. It also does not belong on water the materials cannot take. The standard plate is 304 with copper braze, which is an ordinary-water construction.

Check the secondary loop chemistry on liquid-cooling projects in particular. Some of those loops run deionized water, and deionized water leaches copper from the braze.

Recover the plate letter, the plate count and the two codes after the dashes. The published example is B224M/1P-NC-S: an M plate, single pass, 304 plate with copper braze, S pressure class. With up to 300 plates possible, the count is the field with the most room for error.

Measure the port centres before assuming the frame. The 620 x 202 mm outline is not unique to the B224, and 530 x 112 mm between port centres is what confirms it.

If the count is unreadable, count the plate edges on the side of the pack, twice.

Only if the type matches as well as the size. The frame is catalogued with threaded, Victaulic, flange and O-ring connections, and none of them substitutes for another without changing pipework.

The O-ring connection is the one that catches people. It seals against a mating face on a manifold or block, so it suits a unit built into an OEM skid and is of little use on field-run pipe. If an O-ring unit comes out, order an O-ring unit, or plan new spools.

Victaulic is the usual choice for field installation at these flows. There is no solder option on this frame. The port centres, 530 x 112 mm, are the same for every connection type.

Treated closed-loop water and inhibited glycol are the fluids the standard 304 plate and copper braze are meant for.

Chlorides are the limit on the plate. Open tower water that concentrates chlorides, brackish water and pool water will pit stainless, and 304 gives up sooner than 316. If the water analysis is marginal, ask for the quote on a 316 build and we will confirm what is available.

Ammonia and deionized water are the limits on the braze. Both rule out copper, and both call for a copper-free frame.

Build the means into the pipework at installation. That means isolation valves on the side that will foul, and a pair of valved tees between those valves and the exchanger for a circulation pump and tank. Adding them later means draining the system.

On a heating substation the tap-water side is the one that scales, because hardness comes out of solution on the hot plate surface. On a cooling duty it is the facility or tower-water side. Circulate a cleaner that is safe for copper braze, in reverse flow, then flush.

A strainer finer than the published 0.8 mm particle limit handles debris, but it does nothing for scale. See cleaning in place for the procedure.

Flow direction matters most. Pipe it counter-current, with hot in at one end and cold in at the other. A co-current hookup falls short on any duty selected for a close approach.

Mount it vertical so the pack vents at the top and drains at the bottom. Air trapped in the upper channels takes surface out of service.

Then deal with the load. A 300-plate pack holds about 56 liters, so a unit near 103 kg dry runs close to 160 kg in service. Support the pipework on its own steel.

Because this frame is selected on pressure drop, the allowable pressure drop on each side matters as much as the heat load. Without it, the selection is a guess between a small pack that costs pump power and a large one that costs money.

Send the fluids, the flow on each side, all four temperatures, the allowable pressure drop per side, the design pressure, and the connection type and size. For a replacement, the designation covers most of that.

We hold no catalogued part numbers for the B224, so each unit is quoted as a configured build, with availability confirmed in the quote. Request a Quote takes the duty or the nameplate string.