Water softening system

摘要

1,063,848. Ion exchange. UNION TANK CAR CO. June 2, 1964 [June 5, 1963], No. 22755/64. Heading B1J. [Also in Division F2] A valve 130, Fig. 2, permits liquid to pass from a line 64 to a line 68 when a chamber 122 is at high pressure and from the line 68 to a line 26 when the chamber is at low pressure. In the preferred embodiment, the valve is used in a water softening system and the changes in actuating pressure are produced by an aspirator valve 20, Fig. 1, mounted in the brine tank 28 and connected to the main valve 12. During the softening process, the chamber 122 is at the higher pressure value and the valve is in the position shown to permit acid solution to flow from a storage space 38 to a measuring chamber 40. When regeneration is started by actuation of the main valve 12 the pressure in the chamber 122 falls and a spring 144 raises the valve 130 to close a port 132 and open a port 136 which allows the measured quantity of acid solution to flow through channels 106 and an elastic non-return valve 118 into the pipe 26, the acid solution passing simultaneously with the brine through the ion exchange resin. In Fig. 7 the valve 118 is replaced by a rigid closure 214 having a sliding fit on the valve stem 218 to enable it to be moved upwardly to close the port 204 when the chamber above the diaphragm is at high pressure. The storage and measuring chambers for the acid solution form part of a cartridge detachably secured in a container 46 by a rod 54. A spring clip 70 allows the size of the measuring chamber to be adjusted.