SWEP B327

Large liquid-to-liquid heat transfer where the two flows are unequal: heat reuse into a network, thermal storage charging, substations. The asymmetric channels, 0.233 and 0.265 dm3, let the higher-flow circuit take the larger passage.

Look elsewhere if either fluid rules out copper braze, as ammonia and deionized water do.

Two things to settle before ordering. The published approvals are PED, UL and KHK, so a tap-water duty that requires a potable-water certification has to be raised at the quote. And the published example carries pressure class Y, which is not one of the common letters. Call for rating and give us the design pressure so the unit is quoted against a figure.

By circulation, one side at a time, with the exchanger isolated. On a substation or tap-water station the side that needs it is the one heating raw water, where hardness scales out on the plates. The network side, on treated water, usually stays clean.

The size of the frame affects the equiptment. A cleaning rig that suits a small exchanger will not turn over a pack that normally passes up to 83 m3/h fast enough to carry loosened scale out. Use a pump that gives real velocity through the channels, run it in reverse flow, and use a cleaner that is safe for copper braze.

Debris is a seperate matter. Keep it out with a strainer finer than the 0.8 mm particle limit.

Yes. The channels are asymmetric, so the two sides are not equivalent. The selection assigns each circuit to a side, and the connection positions on the drawing follow from that. Swapping them on site puts the larger flow through the smaller channel, and the pressure drop on that circuit comes out well above the calculated figure.

Pipe it counter-current, mount it vertical so it vents and drains, and set the exchanger before fitting the pipe to it, so no spool is pulled into line against the ports. See mounting and piping.

Face size and port centres are fixed: 693 x 243 mm and 598 x 148 mm. The pack depth depends on the plate count, so a replacement with a different count has a different depth. Measure the old pack front to back, and measure the clearance behind it.

Then check what the supports will carry. A 260-plate unit is about 126 kg (277 lb) dry and holds roughly 64 liters, so it runs near 190 kg full of water.

Confirm the connection type against the pipe: threaded, Victaulic or flange. We hold no catalogued part numbers for this frame, so the build is confirmed from the nameplate designation at the quote.