SWEP V80

Every V80 configuration on file is single-pass - the designations read /1P, as in V80Hx40/1P-SC-S. For a replacement, that is the arrangement to expect and to confirm on the nameplate.

A different pass arrangement is a different exchanger in practice. Passing a fluid through the pack more than once raises its velocity and its pressure drop, changes the temperature profile the refrigerant sees, and generally relocates connections. It is a decision for a new design with a rating behind it, not a field substitution. If a nameplate shows anything other than 1P after the slash, send it as stamped and we will confirm what it is.

The catalogued V80 units are consistent in most respects: H plate, single-pass, material code SC, pressure class S, a 35.1 refrigerant outlet and 2x1 1/4"&28U water connections, between 30 and 90 plates. Two things vary and need to be read or measured.

One is the plate count, after the x. The other is the refrigerant inlet, which is either 16 or 22U. Some designations also carry (27) after each connection; copy it if it is there, because it distinguishes otherwise identical part numbers. With plate count, inlet size and that suffix, the configuration is identified.

No - 74.41 GPM (16.9 m3/h) is the most the ports will pass, and a selection running near it will have a high water pressure drop. Design flow comes from the capacity and the water temperature difference, and the plate count is then chosen to carry that flow at a pressure drop the pump can live with.

If the design water flow is close to the ceiling, or the pressure drop is still too high at a large plate count, the duty has outgrown the frame. Move to a wider frame in the 75 to 200 GPM band, such as the SWEP V120T, instead of forcing more plates into a V80.

All five are 526 x 119 mm. The V80 is the versatile evaporator, in 316/316L with copper braze. The F80 (304 plates) and P80 (316/316L plates) are evaporators that SWEP describes as optimized for a significant increase in heat flux. The B80 is the base model, listed with 304 plates.

The B80S stands apart: 316 plates with stainless braze, an All-Stainless unit for systems that require 100% stainless components, for high temperatures and for media that corrode copper such as ammonia. Its published max flow is 74.85 GPM against 74.41 GPM for the others. See Plate and Brazing Materials.

These models are catalogued alongside the V80. 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 F80 - A copper-brazed 304 stainless evaporator on the 80 frame for chillers and heat pumps.

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