Generally speaking, for customers in cold areas in the north, if it is used for the working conditions of extremely low outdoor temperature and possible freezing, when the equipment is shut down, it is necessary to discharge the condensate in the pipes, valves and equipment in time to avoid freezing and cracking the valves and pipes. However, sometimes because there are many trap points, in some remote places on the periphery, it may not be possible to drain the water in time, for these working conditions, for the sake of convenience, it is recommended to choose a professional anti-freeze trap, that is, on the basis of the conventional trap, add an automatic drainage device - antifreeze valve.
Of course, one more trap means an additional leak point, so from the perspective of energy saving, it is better to avoid the use of freeze-proof traps in large quantities.
About antifreeze valves.
Installed at the drain plug of the trap, the steam pressure in the trap valve drops to about 0 when the steam-using equipment is shut downAt 015MPag, the antifreeze valve B will be activated immediately to discharge the condensate remaining in the trap A to prevent the condensate from accumulating in the valve body, resulting in the freezing and cracking of the trap.
When the steam device is activated, the steam pressure in the trap body rises to 0At 02MPag, the antifreeze valve B closes immediately to prevent steam leakage.