The HDW 400 L heat pump storage tank is equipped with a particularly large heating surface and is therefore ideal for systems with high heat pump outputs. Thanks to its robust construction and excellent insulation values, it is also suitable as an additional storage tank for oil, gas, solids and similar applications.

The insulation is available in two variants: For types up to 500, 75mm PUR rigid foam (directly foamed) is used, while from type 750 onwards, high-quality fleece insulation (Made in Germany) is used. A double-wound smooth tube heat exchanger (1 inch tube) ensures efficient heat transfer. The storage tank is made of robust quality steel S275JR, designed according to EN 10025 and EN12897:2006, and enamelled according to DIN 4753 - this gives you optimal corrosion protection and a long service life.

Product features at a glance

• Insulation:
  • up to type 500: 75mm PUR rigid foam (directly foamed)
    
• With a double-wound smooth tube heat exchanger (1 inch tube) for efficient heat transfer
• Highest processing quality thanks to quality steel S275JR according to EN 10025, manufactured according to EN12897:2006
• Enamelled according to DIN 4753 for optimal corrosion protection
• Operating pressure: 10 bar
• test pressure: 16 bar
• Maximum operating temperature: 95°C
• Up to 5 years warranty (with proven maintenance)