| 摘要 |
<p>Appts. for the internal deoxidn. of water central heating- and similar- systems includes a tank contg. a soln. of chemicals suitable for the deoxidn. treatment. Two sets of pipes are used with a circulating pup to connect the tank to the system which is to be deoxidised. One set of valves (a) is used to include or exclude the tank from the circulation system; and a second set of valves (b) can be used to reverse the direction of circulation in the two sets of pipes. Valves (a, b) may be operated manually or by solenoids connected in electrical circuits so the valves (a, b) can be opened and closed in a desired sequence. The valves pref. form an interconnected network on both sides of the pump, i.e. the inlet and outlet sides. The appts. is pref. mounted on a mobile trolley.</p> |
