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Chilled-water-pipe-air-vent, the closed loop piping network, such as that of chilled water system usually has an air separator in the pump room. furthermore, automatic air vents are provided at the highest points (pipe risers) to expel air before it even reaches the air separator.. When water is pumped through the system, the initial air inside the piping is pushed into the air vent by the pressure of the flow. the float remains in the lower part of the air vent, allowing the valve to remain open and air to be rapidly discharged., http://www.caleffi.us - air vents a brief explanation of manual and automatic air vents, how they work and how they are constructed, and how to apply vents i....

P i a ma˛i ˝ o˘eˇa˙i g pˇeˆˆ˝ˇe: 150 psi ma˛i ˝ o˘eˇa˙i g te ˘eˇa˙˝ˇe: 240°f b d˚ ma˙eˇia : brass c ec˙i : 1/4” mpt f a˙ ma˙eˇia : polypropylene ca˘ ma˙eˇia : nylon aa, during filling, maintenance, or through oxygen infiltration, air is introduced into every hydronic heating/cooling system. to function properly, the air must be eliminated and these air eliminators are designed to remove trapped air, micro bubbles and dirt from heating, cooling and domestic water systems..

Re: why does air trapped in a system of water filled pipes cause flow to 'lock' date: tue nov 11 13:01:25 2003 posted by: gavin ward, , physics, aea technology area of science: engineering id: 1065605369.eg