SWEP B12x40/1P brazed plate heat exchanger, 1 1/4" NPT / G 1 1/4", 40 plates, PN 30
- Application: primary/secondary loop separation — DHW, heating, small heat pumps
- Heat capacity: ~60-130 kW (depends on flow rates and ΔT)
- Nominal pressure: PN 30 (30 bar)
- Connection: 1 1/4" NPT / G 1 1/4"
Where SWEP B12x40/1P is used
Mid-size B12 series exchanger — larger port section gives lower Δp at similar flow. SWEP T-series "turbulence" plate profile provides a high heat transfer coefficient even at low flow rates — important for condensing boilers and heat pumps where ΔT between loops is small (5-10 °C). The brazed gasket-free construction requires no periodic maintenance that gasketed exchangers would need — so SWEP is often chosen for modular substation skids where each service visit carries logistics cost.
Technical specifications
| Parameter | Value |
|---|---|
| SKU | B12x40/1P |
| Series | SWEP B12 |
| Model | B12x40/1P |
| Configuration | 1-pass (1P) |
| Number of plates | 40 |
| Construction | Brazed, hermetic — gasket-free |
| Nominal pressure (PN) | 30 bar |
| Temperature range | -40 °C ... +200 °C (copper brazed) |
| Connection | 1 1/4" NPT / G 1 1/4" |
| Plate material | Stainless steel AISI 316 (standard) |
| Brazing filler | Copper |
| Media | Water, glycol solutions, refrigerants (compatible with stainless steel and copper) |
| Standards | PED 2014/68/EU |
Heat transfer capacity — quick calculation
Capacity depends on flow rate, ΔT and logarithmic mean temperature difference (LMTD). General formula: P = Q × ΔT × 1.163 (P — kW, Q — m³/h, ΔT — °C).
Example for DHW mode (primary 65/40 °C → secondary 10/55 °C, ΔT ≈ 20 °C): at Q = 2 m³/h → P ≈ 46 kW. This 40-plate pack typically delivers ~60-130 kW (depends on flow rates and ΔT).
When to choose SWEP B12x40/1P
- Multi-family DHW primary heat exchanger (~30-100 kW)
- Small-to-mid heat pump condenser / evaporator
- Condensing boiler system loop separation
- Cooling buffer separation for small commercial zones
- Underfloor heating loop separation from high-temp primary
B2B delivery and logistics via Amegata.lt
- Delivery within 3-7 business days across Lithuania (made-to-order from SWEP)
- Competitive B2B pricing — often below market average
- 30-day payment terms for companies (per contract)
- Free technical consultation for sizing (SSP calculations)
Official SWEP product page: swepgroup.com
Frequently asked questions
What do "T" and "x" mean in the SWEP model name?
"T" (as in B10T) — SWEP "turbulence" plate profile, higher heat transfer coefficient for standard HVAC duties. "x" (as in B12x, B16x) — denotes a specific plate variant within that series. The number after "x" — plate count in the pack. "/1P" — single-pass, "/2S" — two sections.
Can glycol mixtures be used?
Yes. SWEP B-series exchangers are compatible with ethylene glycol and propylene glycol solutions up to 50 %, with proper inhibitors. For DHW — only potable-grade fluids.
What maintenance is required?
Brazed gasket-free construction requires no periodic disassembly maintenance. Recommended only CIP (Clean-in-Place) flushing every 3-5 years if fouling signs appear (rising pressure drop or falling heat transfer).
Is it suitable for potable water?
Yes. Stainless steel plates and copper brazing meet potable water system requirements (WRAS, DVGW and similar certifications, depending on country).
Is it suitable for regions with aggressive water?
In some Lithuanian regions, district heating water contains elevated chlorides or ammonia — in such systems copper brazing may shorten service life. In these cases we recommend the SWEP nickel-brazed variant or a gasketed alternative with titanium plates. For hard water with elevated Ca/Mg carbonate content, limescale gradually builds up on the plates and reduces heat-transfer efficiency; for such systems gasketed (plate-and-frame) exchangers are preferable, as they can be periodically opened for mechanical or CIP cleaning. Contact us — we will select the model best suited to your water conditions.
When to choose brazed vs gasketed?
Brazed (SWEP) — when you need a compact, light, "fit and forget" solution without gasket maintenance. Gasketed (e.g., Hexonic F-series) — when you need the ability to clean off fouling, change capacity (add plates) or handle very hard water.
