Three port mixing control valves for:hot water ,chilled water,Domestic Hot Water,in ... Heating, Ventilating, Air Conditioning ApplicationThree port mixing control valves for:hot water ,chilled water,Domestic Hot Water,in Heating ... brass (upper)Replaceable brass (lower)Plug: BrassStem: Stainless steelPacking: Spring loaded carbon fiberreinforced PTFE V-ringsMedium temperature andpressure: Water 2 to ...