SWEP F80

SWEP lists the F80 with threaded, Threaded Ultra High Approved, Victaulic and solder connections. On an evaporator the refrigerant ports are normally solder and the water ports threaded or grooved, but the nameplate decides: the connections are written in port order at the end of the designation.

Match type and size on all four ports, not just the pair you can see from the front of the machine. The right plate pack with the wrong connection means adapters, and every adapter on a refrigerant line is another joint that can leak. A size written with a U, such as 22U or 28U, is a universal solder connection that takes both imperial and metric tube.

Flow proof and a refrigerant-side safety that actually trips. An evaporator freezes when the refrigerant keeps boiling below the water's freezing point while the water flow is low or stopped - a failed pump, a blocked strainer, or a compressor started ahead of the pump. Ice in the channels can split a brazed unit, and a split unit is a replacement.

Where the leaving temperature is close to freezing, run the loop on glycol. Glycol is thicker than water and transfers heat less well, so the selection has to be made at the real concentration; a unit sized for water and later filled with glycol will run a higher pressure drop and a wider approach. See Freeze Protection for the control side.

Vertically, with the two fluids in counter-current. Two-phase duty needs the plates upright so the refrigerant enters at the bottom and leaves as vapor at the top; laid on its back or side, an evaporator distributes badly and carries liquid over. Counter-current piping gives the closest approach, and crossing the water connections is the usual reason a new unit underperforms the old one.

Support the piping independently. The connections are not there to carry pipe weight, pump vibration or the thermal growth of a long run. Compressor pulsation and water hammer fatigue the braze joints over time.

No. The published 16.9 m3/h (74.41 GPM) is a ceiling set by the ports, not a design flow. A unit running near it has high port velocity and a high pressure drop regardless of how many plates are behind the ports.

Adding plates, up to the 140 the F80 allows, lowers the channel pressure drop and tightens the approach, but it does nothing for the port loss. If the required water flow sits close to the ceiling, or the pump cannot afford the drop, the answer is a larger frame with bigger ports rather than a deeper F80. Send the flows and allowable pressure drop with the request and we will confirm which frame carries it.

These models are catalogued alongside the F80. Each has its own page with its dimensions, materials and part numbers.

SWEP B80 - The 526 mm standard - and the plate shared by the F80, P80 and V80 evaporators.

SWEP B80S - The All-Stainless B80 - 316 plates with stainless braze for copper-free duty.

SWEP P80 - A copper-brazed 316/316L stainless refrigerant evaporator on the 80 frame for chillers.

SWEP V80 - General-purpose evaporator on the B80 frame, 526 x 119 mm, up to 140 plates, 74.41 GPM max flow.