[ Safety release valves for controlling pressure in heating systems when the pressure reaches dangerous levels; thermal discharge valves to ensure the water temperature in heating systems does not reach dangerous levels; ] Anti-condensation valves for mixing hot and cold water and controlling temperature of heat generators [ ; heating systems comprised primarily of pumps and valves through which cold, warm, or high temperature water circulates in heat generators ]

'anti':33 'anti-condens':32 'circul':64 'cold':40,58 'compris':50 'condens':34 'control':5,43 'danger':14,30 'discharg':17 'ensur':20 'generat':47,67 'heat':8,25,46,48,66 'high':61 'hot':38 'level':15,31 'mix':37 'pressur':6,12 'primarili':51 'pump':53 'reach':13,29 'releas':2 'safeti':1 'system':9,26,49 'temperatur':23,44,62 'thermal':16 'valv':3,18,35,55 'warm':59 'water':22,41,63

[ Digital controllers, namely, temperature controllers for driving valves and for hydraulic equipment for liquids ]

'control':2,5 'digit':1 'drive':7 'equip':12 'hydraul':11 'liquid':14 'name':3 'temperatur':4 'valv':8

[ Heat exchangers being parts of machines ]

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