Tml DSFI00500R Kettle lt. 500 in AISI 316L stainless steel with two heat exchangers with fixed coil rigid insulation

Vertical 500-Litre AISI 316L stainless steel (1.4404) DHW Storage Tank – DSFI00500R

The DSFI00500R is a vertical domestic hot water (DHW) storage tank with a capacity of 500 litres, manufactured in AISI 316L stainless steel (1.4404) by TML Industrie Loddo. Equipped with two independent fixed spiral coil heat exchangers providing a total heat exchange surface of lower 1.95 m² (solar circuit) + upper 1.1 m² (boiler circuit), it delivers outstanding thermal performance for both residential and large commercial or industrial applications.

Technical Specifications – DSFI00500R

• Tank material: AISI 316L stainless steel (1.4404) – Pickling and passivation inside and out.
• Max pressure / Max temperature (domestic side): 6 bar / 95°C
• Actual capacity: 500 litres
• Lower heat exchanger (solar): 1.95 m² – Fixed spiral coil – max 10 bar / 95°C
• Upper heat exchanger (boiler): 1.1 m² – max 10 bar / 95°C
• Cathodic protection: Replaceable magnesium anode
• Insulation: Rigid PU foam + PVC, thickness 50 mm (Fire class B3 DIN 4102)
• ErP: Class B – Heat loss: 80.6 W
• Dimensions: Ø 650 mm × Height 1645 mm
• Weight: 104 kg
• Electric heater connection: 1½" fitting (heater not included)
• Warranty: 5 years

Why Choose the DSFI00500R?

Two independent coils: the lower coil is dedicated to the solar collector, the upper one to the backup boiler, maximising energy efficiency and solar yield. The vertical design optimises space utilisation and promotes thermal stratification, improving overall system efficiency. Pre-fitted for DHW recirculation, thermostat, temperature sensor, and electric backup heater.

Applications and Compatibility

Ideal for solar thermal systems combined with a gas boiler or heat pump backup. The wide capacity range available across the SFI/DSFI line (150 to 5,000 litres) makes this tank the ideal solution for apartments, villas, hotels, sports facilities, and industrial plants requiring a reliable and continuous supply of domestic hot water.

Standards and Certifications

The DSFI00500R complies with: PED Directive 2014/68/EU (Art. 4 Par. 3 – pressure equipment), Italian D.M. 6 April 2004 N.174 (material suitability for contact with drinking water), ErP Directive 2009/125/EC (energy-related products).