Patent GB-1276172-A (GB)
Title: Improvements in or relating to water-softener valve devices
IPC: C02F1/42
Filed: 1969-07-21
Abstract: 1276172 Valve device for use with ion-exchange water softening apparatus SAPIR SA 21 July 1969 [26 July 1968] 36658/69 Heading B1J A valve device, illustrated diagrammatically in Figure 1, for association with the reservoir 1 of a water softener wherein water is softened by means of ion-exchange material disposed within the reservoir, comprises an inlet duct 2 for water to be softened, an outlet duct 3 for softened water, a by-pass conduit 7 interconnecting the inlet duct and the outlet duct, a reversing valve 8, 9 situated at the junction of the inlet duct and the by-pass conduit to control flow through the inlet duct and the bypass conduit and controlled by a piston 10 mounted in a cylinder 11 provided with a hole 15 constituting an air vent, movement of the piston in the cylinder being controlled by means of two control valves 12 and 18 actuated by a mechanism (not shown) which simultaneously opens both control valves or simultaneously closes both control valves, one control valve being situated in a first branch line 13 interconnecting the inlet duct and the cylinder and the other control valve being situated in a second branch line 16 interconnecting the inlet duct and a drain duct 19, a free-floating non-return valve 21 situated in the outlet duct and automatically closing when the by-pass conduit is opened, and a third branch line 22 communicating with the outlet duct for delivering to reservoir, when both control valves are in the closed position, rinsing water and/or regenerant for the ion-exchange material in a manner such that, in the reservoir, the direction F 2  of flow of rinsing water or regenerant is opposite to the direction F 1  of flow of water to be softened therein. Situated in the third branch line is a brine injection system 25 connected via a line 26 to a vessel 27 for containing brine; the vessel may be provided with a control valve 28 responsive to a float 29 and a non-return valve 30 may be situated in the third branch line to permit flow therein only in the direction F 3 . The cylinder containing the piston may communicate with the second branch line and hence the drain duct by a line 20, the orifice of the cylinder communicating with the second branch line having a smaller cross-section than the orifice of the cylinder communicating with the first branch line. The inlet duct may be connected to a first tube 4 extending to the vicinity of the bottom of the reservoir and the outlet duct may be connected to a second tube 5 having a shorter length than the first tube; the lower end of each tube may be provided with filter means 6. In a construction of the valve device illustrated in Figures 2, 3 and 4 (not shown), the first and second branch lines extend parallel to the by-pass conduit one on either side thereof, the cylinder containing the piston is disposed between the first and second branch lines, each of the two control valves comprises a valve body from which projects a rod for actuating the valve, and the rods of the two control valves are simultaneously actuated by a fulcrumed lever responsive to a control member in the form of a rotary cam mounted on a shaft.