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1. Type of heat exchanger – plate type on a single support frame, dismountable design with the possibility of changing the heat exchange area, intended for operation in an independent heat carrier circuit.
2. Execution option – single-stage parallel scheme.
3. Material of plates – stainless steel of class not lower than AISI 316L, thickness of plates – not less than 0.5 mm. Material for sealing plates – EPDM rubber or better. Seals must have exclusively clip fastening to the plates, adhesive fastening is not allowed.
4. Plates must have a nominal connection diameter of 100 mm and a distance between holes of 225÷300mm horizontally, 1770÷1775mm vertically, and a plate heat transfer coefficient of not less than 8707W|m²*K. The end plate – blind to avoid contact of the frame with the heated water.
5. Material of the heat exchanger frame not lower than steel 3, material of the tension rods – galvanized steel of strength class not lower than 8.8, material of bolts, nuts, washers – galvanized steel, thickness of plates: not less than 30 mm. Material of the guide – not lower than steel 09G2S galvanized or equivalent 6. The frame design must be completely dismountable, it is not allowed to weld guides to the frame or guides to the support post, all structural elements must be detachable.
7. The heat exchanger must be equipped with galvanized fastening elements for securing with anchor bolts on the foundation or for securing on the frame with bolted connecting elements.
For ease of maintenance, the frame design must allow easy movement of the pressing plate along the guides.
8. Port placement: support plate: left top – inlet of the heat carrier, left bottom – outlet of the heat carrier, right bottom – inlet of the heated water, right top – outlet of the heated water.
9. Pipes must be flanged with a nominal connection diameter of DN100mm, working pressure of 16 bar, with a pipe length of not less than 130mm – for the primary circuit and not less than 195mm - for the secondary, equipped with corresponding flanges with bolted fastening elements and the possibility of free maintenance of flanged connections.
10. The paint coating of all metal surfaces must be made with paint with high adhesive, anti-corrosive, and aesthetic properties, applied in 2 layers by spraying to ensure long-term protection against corrosion, paint color - blue.
11. The heat exchanger must have a plate attached to the body, made of corrosion-resistant material, on which the following data must be indicated: short name of the product, type of heat exchanger, surface area of the heat exchanger, design pressure, structural execution, material of plates, material of seals, net weight, etc.;
12. Overall dimensions of the heat exchanger not more than: width - 480 mm, height - 2235mm, length of the frame - 1380mm.
13. Pressure of the heat exchanger – working 16 bar, test 20.8 bar.
14. Heat carrier – water/water.
