Kelvion GBS400H-DS-43/43 brazed plate heat exchanger, PN 30, ~220 kW
- Application: primary/secondary loop separation — district heating, DHW, process loops
- Heat capacity: ~220 kW (at nominal flow and ΔT ≈ 20-25 °C)
- Nominal pressure: PN 30 (up to 31 bar working pressure)
- Temperature range: -196 °C … +200 °C
- Connection: G 1 1/4" external thread (S1-S4)
Where GBS400H-DS-43/43 is used
This 43-plate brazed heat exchanger is typically installed in medium multi-family substations, commercial building user branches and compact process systems. The Kelvion GBS series uses Safety Chamber™, Delta Injection™ and Full Flow System™ technologies — ensuring uniform flow distribution, reducing fouling risk and protecting against media cross-contamination at the port areas. The brazed gasket-free construction requires no periodic disassembly maintenance that gasketed exchangers would need.
Technical specifications
| Parameter | Value |
|---|---|
| Code (SKU) | GBS400H-DS-43/43 |
| Series | Kelvion GBS400H |
| Model | GBS400H-DS-43/43 |
| Number of plates | 43 |
| Nominal pressure (PN) | 30 bar (max ~31 bar) |
| Temperature range | -196 °C … +200 °C |
| Connection | G 1 1/4" external thread (S1-S4) |
| Plate material | Stainless steel 1.4404 (AISI 316L) |
| Brazing filler | Copper brazing filler |
| Dimensions (H × W × D) | 335 × 124 × ~112.5 mm |
| Weight | ~13 kg |
| Construction | Brazed, hermetic (gasket-free) |
| Nominal heat capacity | ~220 kW |
| Media | Water, glycol solutions, other media compatible with stainless steel and copper |
Heat transfer capacity — quick calculation
Capacity depends on flow rate, ΔT and logarithmic mean temperature difference (LMTD). General formula: P = Q × ΔT × 1.163 (kW, Q m³/h, ΔT °C).
Example for heating mode (primary 90/70 °C → secondary 65/40 °C): at effective ΔT ≈ 20 °C, 220 kW capacity requires Q ≈ 9.5 m³/h. With a wider ΔT ≈ 25 °C the same 220 kW is achieved at Q ≈ 7.6 m³/h — lower flow, lower pump losses.
When to choose GBS400H-DS-43/43
- Substation user branches with capacity demand ~187-252 kW
- DHW primary heat exchanger for medium-to-large systems
- Cooling systems buffer separation (primary chilled water / secondary building loop)
- Process systems requiring up to 30 bar working pressure and high temperatures (up to +200 °C)
- When a compact, hermetic solution without gasket maintenance is required
B2B delivery and logistics via Amegata.lt
- 24-hour delivery across Lithuania (from our warehouse in Vilnius)
- Competitive B2B pricing — often below market average
- 30-day payment terms for companies (per contract)
- Free technical consultation on sizing and alternative Kelvion series (GBH, GBS-DW double-wall)
Official Kelvion catalogue: kelvion.com/GBS series
Frequently asked questions
What do "H" and "L" mean in GBS series naming?
Kelvion GBS plate geometry is coded with a letter after the size: "H" (High Theta) — higher chevron angle, higher heat transfer coefficient, higher Δp; "L" (Low Theta) — gentler profile, lower Δp, suits higher flow rates with a limited pressure budget; "M" (Medium) — a compromise. "H" fits compact heating exchangers, "L" fits high-flow or cooling applications.
Can glycol mixtures be used?
Yes. Kelvion GBS series exchangers are compatible with ethylene glycol and propylene glycol solutions up to 50 %, when appropriate inhibitors are used. For DHW — only potable-grade fluids allowed.
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 regions with aggressive water?
In some regions, district heating water contains elevated chlorides or ammonia — in such systems, copper brazing may shorten the exchanger's service life. In these cases we recommend the Kelvion GBS-DW series (double-wall protection) or nickel-brazed variants. 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.
How does the "DS" connection variant differ from standard W, FN, RA?
Kelvion GBS exchangers are supplied with various connection types (different thread sizes, weld connections, combi variants). The "DS" variant is a specific connection standard commonly used in European district heating and HVAC projects. Before installation it is important to verify the exact connection type and size against the Kelvion datasheet — Amegata sales will provide the specific SKU connection drawing on request.
