Automatic pressure maintenance and filling units of SPL/SPL-S system can carry out two technological processes: filling of the system and maintenance of the set operating pressure in it, changing both as a result of thermal expansion of the coolant and at its leakage. During the whole operation of the AUPDZ the working fluid is deaerated.
They are designed for closed heating and cooling systems with large volumes of coolant and high static pressure, where the installation of expansion tanks is no longer a sufficiently effective solution to the issue of maintaining operating pressure. AUPD SPL are manufactured in accordance with GOST 31839-2012, GOST IEC 60204-1-2002, GOST 30804.6.2-2013, GOST 30804.6.4-2013.
They meet the requirements of SP 41-101-95 and SP 60.13330.020.2037.30.03 Patent for Invention No. 2696291.
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