12 This special coil eases the high water pressure in the tube bends, preventing the bends from bursting. The pressure is diverted away into the pipe system via a safety valve. AIRCOIL HEATING COIL WITH THERMOGUARD FROST PROTECTION TYPE HWTG HOW THERMOGUARD WORKS THERMOGUARD IS A SPECIALLY DESIGNED FROST PROTECTION SYSTEM BASED ON MOTHER NATURE’S OWN LAWS. Safety valve Pressure relief hole Fin section Pressure relief to heating return or via safety valve
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