Tml SM2X02000F Combined storage tank Solarmax lt. 2000 in AISI 316L stainless steel with two fixed coils with flex insulation

Combined Thermal Storage Tank Solarmax 1950 Litres – Instant DHW Production – SM2X02000F

The Solarmax SM2X02000F is a combined thermal storage tank with a capacity of 1950 litres, designed by TML Industrie Loddo for instant domestic hot water (DHW) production via a high-efficiency corrugated stainless steel AISI 316L heat exchanger, combined with heating water storage in a carbon steel buffer. The system is configured with 2 primary heat exchangers: lower finned copper 5.0 m² + upper FE spiral 3.8 m². The patented thermal flow director uses natural convective motion: the finned copper solar coil heats the fluid at the bottom of the tank, which is channelled upward to meet the corrugated DHW heat exchanger, transferring heat in an orderly, continuous cycle. This allows immediate use of initial solar energy gains without waiting for full tank stratification.

Full Technical Specifications – SM2X02000F

• External buffer (heating storage):
• Material: Carbon steel S235Jr – bare inside – anti-rust coating outside
• Max pressure / Max temperature: 3 bar / 95°C
• Buffer capacity: 1950 litres
• DHW heat exchanger (instant production):
• Material: AISI 316L stainless steel (1.4404) – pickled and passivated
• Type: Fixed corrugated tube with high exchange surface
• Exchange surface: 12.0 m²
• Max pressure / Max temperature: 6 bar / 95°C
• Thermal output at 65°C primary: 141.1 kW
• DHW available (65°C, 20 L/min, fully heated tank): 1244 litres
• Lower primary heat exchanger (solar): finned copper – flat-ring spiral coil – 5.0 m² – max 10 bar / 95°C
• Upper primary heat exchanger (boiler/biomass): raw carbon steel – fixed spiral coil – 3.8 m² – max 10 bar / 95°C
• Insulation: flexible polyester + PVC 130 mm (Fire class B2 DIN 4102)
• ErP: Class C – Heat loss: 184.0 W
• Dimensions (insulated body): Ø 1100 mm × Height 2385 mm
• External diameter (insulation): Ø 1300/1360 mm
• Tilt diagonal R: 2385 mm
• Indicative weight: ~309 kg
• Electric heater connection: 1½" fitting (not included)
• Warranty: 5 years

Instant DHW Production – Corrugated AISI 316L Heat Exchanger

Unlike "tank in tank" systems, the Solarmax produces DHW instantaneously: mains water flows through the corrugated AISI 316L heat exchanger in contact with the hot buffer water and is heated without intermediate storage. The corrugated tube geometry maximises turbulence and exchange surface, delivering high thermal outputs: up to 141.1 kW at 65°C primary. The system requires no internal DHW storage and guarantees high hygiene standards through on-demand production with no water stagnation.

Multi-Energy Compatibility and Applications

The SM2X02000F is compatible with multiple heat sources: solar thermal collectors (lower heat exchanger in finned copper), biomass boiler (dedicated connections), backup boiler and heat generator at high or low temperature. The large 1950-litre capacity ensures adequate thermal storage for large residential buildings, villas and commercial premises. Buffer fluid must operate in a closed loop (oxygen-free).

Standards and Certifications

The SM2X02000F complies with: PED Directive 2014/68/EU (Art. 4 Par. 3), Italian D.M. 6 April 2004 N.174, ErP Directive 2009/125/EC.