Danfoss XB37H-1 Micro Plate brazed plate heat exchanger, G 1", 40 plates, PN 25
- Application: primary/secondary loop separation — district heating, DHW, process
- Heat capacity: ~40-95 kW (depending on flow rate and ΔT)
- Nominal pressure: PN 25 (25 bar both circuits)
- Connection: G 1" external thread (S1-S4)
Where XB37H-1 with 40 plates is used
This size Micro Plate exchanger is typically chosen for medium multi-family substation user branches (primary side from the district heating network, secondary side for space heating or DHW). Capacity demand ~40-95 kW. Also suitable as primary DHW exchanger in commercial and public buildings (offices, schools, small factories).
Technical specifications
| Parameter | Value |
|---|---|
| Code | 004H7306 |
| Series | Danfoss XB37 (Micro Plate™) |
| Model | XB37H-1 |
| Number of plates | 40 |
| Nominal pressure (PN) | 25 bar (both circuits) |
| Temperature range | -196 … +180 °C |
| Connection | G 1" external thread (ISO 228/1), thread length 20 mm |
| Plate material | Stainless steel 1.4404 (AISI 316L) |
| Brazing filler | Copper |
| Frame dimensions (H × W) | 525 × 119 mm (height without feet × width; depth grows with plate count) |
| Weight (net) | 8.3 kg |
| Channel volume | 0.069 L (each side) |
| Construction | Brazed, hermetic (gasket-free), 1-pass |
| Approvals | PED Category I, EU/China RoHS |
| 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 in m³/h, ΔT in °C).
Example for heating mode (primary 90/70 °C → secondary 65/40 °C): at Q = 1.7 m³/h and effective ΔT ≈ 20 °C → P ≈ 40 kW. With Q = 3.3 m³/h and ΔT ≈ 25 °C → P ≈ 95 kW. Typical 40-plate XB37H-1 range: ~40-95 kW.
When to choose XB37H-1 with 40 plates
- Medium multi-family substation user branches (~40-95 kW)
- Primary DHW exchanger for offices, schools, small factories
- Cooling systems buffer separation
- When PN 25 network is required with a compact gasket-free solution
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 for sizing (Hexact)
Official Danfoss catalogue: store.danfoss.com/XB37H-1 40 plates
Frequently asked questions
What does "H" mean in XB37H-1?
"H" denotes a higher plate chevron angle — higher heat transfer coefficient but higher pressure drop. "M" (medium) and "L" (low) variants have different profiles and suit different flow rates / pressure budgets. "-1" indicates single-pass flow configuration.
Can glycol mixtures be used?
Yes. XB37 series is 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.
Is it suitable for potable water?
Yes. Stainless steel 1.4404 plates and copper brazing meet potable water system requirements (RoHS, standard potable water certifications).
Is it suitable for regions with aggressive water?
In some regions, network water contains elevated chlorides or ammonia — in such systems, copper brazing may shorten the exchanger's service life. In these cases we recommend the Danfoss CoResist brazing variant or a nickel-brazed alternative. 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.
