1. IN A CONTROL VALVE FOR WATER TREATING SYSTEMS OF THE TYPE HAVING A TREATMENT TANK WITH TOP AND BOTTOM FLOW POSTS THEREIN: (A) A HOUSING HAVING (1) OPPOSITE UPRIGHT FRONT AND BACK WALLS, (2) AN UPRIGHT WALL CLOSING ONE END OF THE HOUSING AND HAVING (A) AN INLET PORT IN AN UPPER PORTION THEREOF, AND (B) A SERVICE PORT BELOW THE INLET PORT, (3) AN UPRIGHT WALL CLOSING THE OPPOSITE END OF THE HOUSING AND HAVING (A) A DRAIN PORT THEREIN, (4) TOP AND BOTTOM WALLS RESPECTIVELY HAVING (A) A TOP PORT TO CONNECT WITH THE TOP FLOW PORT OF A TREATMENT TANK, AND (B) A BOTTOM PORT TO CONNECT WITH THE BOTTOM FLOW PORT OF A TREATMENT TANK; (B) PARTITION MEMBERS IN THE HOUSING COOPERATING WITH THE WALLS THEREOF TO DEFINE (1) AN INLET CHAMBER HAVING ONE PORTION THEREOF INWARDLY ADJACENT TO AND COMMUNICATED WITH THE INLET PORT, AND HAVING A MAIN PORTION THEREOF CENTRALLY OF AND ON THE BACK WALL OF THE HOUSING, AND DEFINED IN PART BY A FIRST UPRIGHT ONE OF SAID PARTITION MEMBERS THAT IS IN SPACED OPPOSING RELATION TO BOTH THE FRONT AND BACK WALLS OF THE HOUSING,
June 8, 1965 J. RUDELICK CONTROL VALVE MEGHANISM 5 Sheets-Sheet l Filed Dec. 13, 1961 5.5m um M l QQ ZEN-O 29h15@ UUSMUW June 8, 1965 J. RUDELICK 3,187,771
CONTROL VALVE MECHANISM Filed Dec. 13, 1961 5 Sheets-Sheet 2 s'fxz. 4 /2 een TOP DRAIN VALVE @5 BOTTOM DRAIN VALVE SERVICE VALVE IQ) u Y mha? Zn/k Jahn Ru a za Z7 l 4 h4 9 June 8, 1965 J. RUDELICK 3,187,771
CONTROL VALVE MECHNISM Filed Dec. 1s, .1961 5 sheets-sheet s 1&3.
ToP TANK VALVE BOTTOM TANK VALVE Schn .Ru 92ml: 3 n
HWz/waja June 8, 1965 y.'RUDELrlcK CONTROL MECHANISM 5 Sheets-Sheet 4 Filed Dec. 13, 1961 4 M .4.. A. l
Ja z-L'Ru sha1: Mg#
June s, 1965 J. RUDELIEK 3,187,771
CONTROL VALVE MECHANISM Filed Dec. 13, 1961 5 Sheets-Sheet 5 'O1 r .E /78 y 93 102) 9I- 4 v w E @ff- QSS 91' H4`/ 'l I loo H5 ".1 8
6 goz MAIN VALVE PORTS SERVICE BRINE BAcKwAsH RINsE 57- TOP DRAIN VALVE CLOSED CLOSED OPEN cLosEo 60- BOTTOM TANK VALVE cLosEo cLosEo OPEN cLosEo 59- SERVICE VALVE OPEN cLosEo cLosEn CLOSED l- TOP TANK VALVE OPEN CLOSED CLOSED OPEN 69- BY PASS VALVE cLOsED OPEN OWEN OPEN 58- BOTTOM DRAIN VALVE cLOsEo OPEN cLOsEO OPEN 77' /mkm 1J John lzz 271:1:
United States Patent O This invention relates to valve mechanisms and has more particular reference to control valve mechanisms of a type that are particularly well adapted for automatic operation to effect control of the service as well as regenerating operations of a water softening system.
When incorporated in an automatic water softening system, a typical control valve mechanism of this invention may be rendered operative to normally direct raw water from a source thereof through a softener tank containing ion exchange material, and to direct the softened water issuing from the tank to a service line. During a regenerating cycle of the system, the control valve mechanism may be rendered operative to effect the successive regenerating steps of brining, slow rinsing, and
backwashing, followed by a fast ushing operation to assure that the softener tank will contain only fresh softened water when service operation of the system is resumed.
in general, it is the purpose of the invention to provide a control valve mechanism for water softening systems and the like, which features a number of individual valve units mounted on a unitary and compact valve body to govern passages in the valve body that lead to the various system ports of the Valve mechanism.
More speciiically, it is a purpose of this invention to provide a control valve mechanism of the character described, which is ideally suited for automatic operation by a pilot mechanism at the dictate of timing means.
Another purpose of the invention is to provide a control valve mechanism which is especially suited for use with water softening systems and which comprises a housing with chambers so arranged therein that but live pilot operated valve units on the housing are able to so control .communication between the different .chambers as to provide for normal service operation of the system as well as regenerating operation during which the several steps of a regenerating cycle mentioned previously may be automatically performed.
Still another purpose of this invention resides in the provision of a control valve mechanism for water softener systems of the character described, wherein an auxiliary drain port in the body of the mechanism enables backwash fluid that discharges from the body during regeneration of the system to be conducted to an evaporating tank or the like, rather than discharged upon the ground as is now illegal in certain areas of the United States.
With the above and other objects in View which will appear as the description proceeds, this invention resides in the novel construction, combination and arrangement of parts substantially as hereinafter described and more particularly defined by the appended claims, it being understood that such changes in the precise embodiment of the herein disclosed invention may be made as come Within the scope of the claims.
The accompanying drawings illustrate two complete examples of the physical embodiments of the invention Yconstructed according to the best modes so-far devised for the practical application of the principles thereof, and in which:
FGURE 1 is a more or less diagrammatic elevational view of a water softening system governed-by a control valve of this invention;
FIGURE 2 is a sectional View taken through FIGURE 3 on the plane of the line 2 2;
FGURES is a sectional View taken through FIGUREA 2 on the plane of the line 3 3; A FIGURE 4 is a sectional view taken through FIGURE `2 on the plane ofthe line 4 4;
Referring now more particularly to the accompanying drawings, in which like reference characters have been applied to like parts throughout the views, the numeral 5 generally designates a control valve mechanism embodyingV this invention. As seen in FIGURE l, the control valve mechanism is adapted for incorporation in an auto matic water softening system thatincludes an upright water softener tank 6 containing a bed of ion exchange material not shown, preferably of the synthetic resin type. The tank 6 is provided with top and bottom flow ports 7 and S, respectively, and the system further includes a brine tank 9 containing a store of salt and a quantity of concentrated brine which is used during regeneration of the ion exchange material in the water softener tank. A pilot valve lil, driven by an electric motor 11, effects actuation of the control valve mechanism at the dictation of a timing device of a conventional type, not shown, to periodically cause regeneration of the system.
The control valve mechanism 5 comprises a shallow or iiat upright main housing l2 of substantially rectangular rconfiguration as'seen in FGURE 2. spaced apar-t substantially wide upright front and back walls 13 and 14, respectively, connected at their margins by substantially narrow horizontal Walls l5 andl at the top and bottom, respectively, of the housing, and upright end walls 17 and i8 at the opposite sides of the housing. An injector housing i9, smaller than the main housing, is bolted or otherwise secured to the back wall 14 of the main housing to form therewith a unitary valve body.
The housing is provided with live external system ports, all located in the narrower walls at the top, bot- -tom and ends of the main housing, and alltbeing internally threaded for connection with pipe lines. One of these is an inlet port 23 that is connectible with a source of raw wa-ter to be softened, andthe inlet port is located in the end wall 17 near the top of the main housing. The end wall 17 also has a second port 24 therein, located intermediate the inlet port 23k and the bottom of the housing, and this second port is adapted to'be connected with a service line to deliver softened water thereto. In addition to the inlet and service ports described, the top wall l5 of the housing has a tank port 25 therein which is adapted to be connected by a duct 26 with the top flow port 7 of the Water softener tank.
A similar tank port 27 in the bottom wall 16 of the tank is adapted to be connected to the bottom ilow port 8 of the tank by means of a duct 2S. Both the top and bottorn tank ports 25 and 2.7 are located substantially centrally of the top and bottom walls 15 and lo, respectively.
ln the preferredembodiment of the invention, there is but a .single drain port 29, located in the end wall 18 lt has opposite 7 23 thus communicates with a chamber 33 in the upper left hand side of the housing; the service port comthe drain port 29 communicates with a drain chamber 39 in Athe right hand side of the housing, and which drain chamber extends for the full height of the housing.
The inlet chamber 33 extends downwardly from the inlet port a short distance along the end wall i7 and then extends inwardly toward the rear central portion of the housing to at'all times communicate with a main `inlet compartment 43 in the rear of the housing, disposed partly between and partly behind the upper and lower` tank chambers 35 and 37, respectively, and laterally between the drain chamber 39 and an upper portion of the service chamber 34.
The compartmentation described results from the unique arrangement of partition means inside the housing. The drain chamber 39, for example, is defined by housing walls which include an upright partition member ed that is parallel to the adjacent end wall i8 and extends entirely across the lhousing,'from front to back thereof. Note that the partition member is common to and provides one of the walls of the main inlet compartment '43, and also the upper Vand lower tank chambers 35 and 37. The main inlet compartment 43 is defined in part by an upright partition wall l which isrintermediate and parallel to the front and back walls 13 and 14, respectively, and which has joined to its medial Aportion a horizontal partition member 45-thatextends forwardly from it to the front wall 13 of the housing. The partition member 46, however, is only as wide as the main inlet compartment 43, and it separates those portions of the upper and lower tank chambers and 37, respectively, that lie forwardly of the main inlet compartment 43 (see FIG. 3). The main inlet compartment i3 also has top and bottom forming partition members 47 and 4S, respectively, which `are common to the upper and lower tank chambers 35 and 37, respectively, and which extend rearwardlyrfrom the upright partition wall to the back wall i4, as bestseen in FIGURE 3.
Vsimilar and generally parallel to the partition wall 44,
is located in the lett side of the housing interior. An upper portion 51 of the partition 5t) separates the entrance chamber 33 from the top tank'chamber 35, and a lower portion 52 of the partition 5u separates the bottom tank chamber 37 from the service chamber 34. A medial portion 53 of the wall 5% is interrupted to provide free communication between the main inlet compartment 43 and its entrance chamber 33 but separates them from the top tank chamber 35.
In addition, an intermediate portion 54 of the partition wall is curved upwardly and laterally outwardly to the end wall 17 directly above theservice port 24 therein so as to isolate the service chamberl 34 fromy the other compartments within the interior of the valve housing.
A front portion 55 kof the wall 54is alsodirected upwardly behind and then forwardly to the front wall 13 l so as to leave a more or less narrow space 55 in the housing that is at all times in communication with `the service chamber34 and is'located in front of a lower portion of the entrance chamber 33. 'Y
In addition to the external ports described, the housing isprovided'with a number of internal ports in certain of its partition walls, which ports aord communication be# tween the various compartments into which the interior of the housing is divided by the partition members described. Thus, the partition wall d4 has upper and lower ports 57 and 58 therein to respectively communicate the upper and lower tank chambers 35 and 37 with the drain chamber 39. The lower port-ion 520i the partition member 55 similarly has a port 59 therein to attord communication between the lower tank chamber J7 and the service chamber 34. In addition, the lower tank chamber 7 is communicable with the main compartment 43 of the inlet chamber 33 through a port 6d in the lower portion of the partition 45,'while the upper tank chamber 35 is communicable with the main compartment of the inlet chamber through a similar port 61 in the upper portion lof the partition 45. t
Each 0f these internal ports has a sleeveor bushing pressed or screw threaded thereinto (for replaceability) to detine a valve seat 62 that faces an adjacent external wall of the housing,` and a valve element 63 movable toward and from seating engagement with each of these valve seatsY provides for selective communication between the chambers common to each port.
Each of the movable valve elements forms a part of a valve unit 64 that -is mounted in an exterior wall of the main housing opposite one of the internal ports described. While not essential, each ofthe valve units has been shown as of the diaphragm operated type with a flexible diaphragm 65 providing a movable wall Vof a diaphragm chamber 65 on the exterior of the housing. The iexible diaphragm 65 of each valve unit has a motion transmittingV connection 67 with the stem of the movable valve element 63 of the unit, and each of the diaphragm chambers has a port 68 through which the chambers may be pressurized to eiect inward motion of their respective valve elements 63 in directions to engage them upon their associated seats 62, and to also provide for the exhaust of pressure fluid from the diaphragm chambers to thereby allow unseating of their movable valve elements in consequence of the force which liquid in thehousing exerts upon them. The diaphragme 65 thus may be considered as actuators for the valve elements 53.
Though not in all cases essential, the control valve of this invention is also provided with a by-pass port 69 in the upright portion of the partit-ion member 55, to provide for communication between the entrance chamber 33 and .the service chamber 34. Communication between these chambers through the port 69 is controlled by a smaller valve unit 70 mounted in the front wall 13 of the main housing. The valve unit 70 has a piston 71 that is received in a cylinder 72 for endwise sliding movement to carry a Avalve disc 73 on the inner end of the piston toward and from seating engagement with an lannular forwardly faclng seat 74 surrounding the by-pass port 69.
The port 69 is normally closed by the disc on the piston 'il during service operation of the softener system, but when opened, as during regeneration of the ion exchange material in the water softener tank, makes fresh hard water available to the service line.
The cylinder 72 of the valve unit itl is secured in the front wall 13 of the housing in any suitable way, and its outer end is closed by a cap 75 having an operating port 76 therein to provide for exhausting and/ or pressurizing of the space in the cylinder outwardly of the piston 71.
It should be understood, of coursethat the provision of the by-pass valve 76 is an optional feature of the control valve mechanism of this invention, and that normal service operation as Well as all of the steps of regeneration including brining, slow rinsing, backwashing and fast rinsing or ushing are adapted to be carried out by suitable actuation of selected ones of the valve units 64.
v The movable valve elements 63 of the various valve units 64 are actuatable by their diaphragm operators t0 positions closing their respective internal ports at the dicvtation of a pilot valve 78 indicated in the FIGURE l diagram and shown in somewhat greater detail in FIGURE 6.
As will be discussed hereafter, the automatic controls operate through the pilot valve to maintain` all of the internal ports of the valve` mechanism,fexcept ports 59 and 6l closed by their respective valve elements 63 during normal or service operation of the system; to effect brining and slow rinsing as the first steps of a regenerating cycle by causing internal port 58 to be opened along with closure of ports 5'7, 59, 68 and 61; to edect backwashing after a suitable period of slow rinse by causing internal ports 57 and 60 to be opened along with closure of ports 58, 59 and 61 by their respective Valve elements; and to effect fast ushing as the last step ofv a regenerating cycle by causing ports SS and 61 to be opened along with closure of ports 57, 59 and 6i?. The pilot valve further causes the by-pass port 69 to be opened during the entire regenerating cycle, and maintains it closed during nOrmal downilow service operation of the system, at which time only ports 59 and 61 are in their opened conditions illustrated in the drawings.
As stated, the control valve mechanism of this invention is adapted to eect brining of the ion exchange material in the softener tank 6, as the rst step of a regenerating cycle, when itsport 58 is opened and all the others are closed (except for by-pass port 69). contained in the brine tank 9 is educted therefrom through a brine delivery line 7S that connects with the port 7 of a brine chamber Sil formed in the injector housing 19 on the back wall 14 of the main housing. The injector housing 19 provides an elongated upright duct at the back of the main housing, having an inlet 81 in its lower end portion which at all times communicates with the main inlet compartment 43 through a hole 82 in the back wall 14 of the main housing. An O ring 83 confined between the two housings at their lower zone f communication provides a liquid tight joint between the compartment 43 and the inlet end portion of the injector housing. The upper end portion of the injector housing has an outlet 84 which is at all times in communication with the upper tank charnber 35', through a hole S5 in the back wall 14 of the main housing. An O ring seal $6 similarly coniined between the two housings aords a liquid tight seal at their upper zone of communication.
The brine chamber 80 is located intermediate the ends of the injector housing, and brine is educted thereinto in consequence of the rapid flow of fresh hard water entering the injector housing `from chamber 43 upwardly through an injector nozzle 88 xed inside the injector housing with its discharge end-ein chamber 80. The water issuing from the nozzles ows into a tube `or throat member S9 mounted in the injector housing above and coaxial with the nozzle 83. The tube S9 has a larger internal diameter than the nozzle, and substantially directly receives the jet of water issuing therefrom so as to create the sub-atmospheric pressure condition in the brine charnber Si) necessary for educ-tion of brine thereinto from the brine tank.
Thus it will be apparent that at the star-t of a regenerating cycle, water entering the main inlet compartment 43 is constrained to ow into the lower end of the injector housing and through the injector nozzle 3S, so that Water and the educted brine will flow upwardly through the throat 89 and into the upper tank chamber 35, from whence it llows out of the top tank port 25 for downtlow passage through the softener tank. The brine eluent issuing from the bottom of the tank is returned to the bottom tank chamber 37 and discharges through the then open port 5S to the drain port 29. It should be noted that water is diverted through the injector housing only at times when there is a pressure difference in chambers 35 and 43, or in other words, when the pressure in the top tank chamber 3S is lower than that in chamber 43. During nonmal service oper-ation of the system, the pressures in these chambers are the same. Y
The pilot valve has a spindle 90 which is lrotatably received in a bore 91 in the body 92 of the valve, and `a reduced end portion 9b of the spindle extends from the 'body to be driven by the electric motor 1-1, at the dictation of a timer mechanism, not shown. Three 0 rings 93, 94
and 95 encircling the spindle at axially spaced locations provide oblique lands thereon which sealingly engage the Wall of the bore 91 and control communication between pressure and exhaust ports 96 and 97, respectively, opening to the bore near its ends, and the pressure chambers fof all of the valve units on the control Valve housing. For .this purpose the body 92 is provided with a series of operating ports 98, 9?, 191i, 1111 and 102 of'very small diameter, which open to the bore 91 at different axial and circumferential locations with respect to the bore. These ports enable the pilot to selectively supply pressure fluid to or vent the diaphragm chambers of the various valve units 64, in the different combinations necessary to maintain the water softening system either in service operation, or to carry out a regenerating cycle comprising the successive steps of brining, slow rinsing, backwashing and At such times, brine l flushing.V These regenerating operations are accomplished by rotating the spindle 9i) of the pilot valve from its service position shown in FIGURE 6, in one direction and by quarter turn increments to each of'three diderent regenerating positions, from the last of which the spindle may be rotated a final to return it to its service position to conclude regeneration of the system. It is well understoodby those skilled in the art that the timing means that governs operation of the spindle drive motor 11 may be adjusted .to cause the spindle to remain i-n each one of its regenerating positions for anappropriate period of time before effecting its advance to the next position.
During normal service operation of the water softening system, the pilot valve is operable to maintain inter-nal ports 59 and 61 of the control valve open, and to maintain internal ports 57, 58, 60 and 69 of the control valve closed. Consequently, fresh hard water under pressure in the entrance chamber 33 flows into the main inlet compartment 43, out of port 61 to the top tank chamber 35, to issue from the top tank port 25 from whence it is conducted to the upper liow port 7 of the Water softener tank via duct 26. The softened water issuing from the bot-tom ilow port S of the softener tank is returned to the bot-tom tank port 27' of the control valve through the duct 23, and enters the lower tank chamber 37 in the valve housing for iiow through port 59 into the service chamber 34 and the service line that may be connected with the service port 2d thereof.
In order to assure pressurization and/or venting of .the proper uid pressure operated valve units 64 during the service and regenerating operati-onsof the system, the following tube connections are made between the valve units and the pilot ports; the diaphragm chamber for the top drain valve unit 64 associated with the internal port 57, is connected by a tube line 1114 with the port 98 of the pilot; the diaphragm Achamber for thejbottom tank valve unit associated wit-h the internal port 60 is connected by .a tube line with the same por-t @-3 of the pilot; the diaphragm chamber of the service valve unit which is yassociated with the internal port 59 is connected by a tube line 1116 with the port 99 of the pilot; the diaphragm chamber of the top tank valve unit which is associated -with the internal port 61 is connected by a tube line 1537 with the port 16h of the pilot; the diaphragm chamber of the bottom drain valvev unit which is associated with the internal port 58 is communica-ted by a tube line 1118 with the port 1%1 of the pilot; and the cylinder of the =bypass valve '71.5 is communicated by Va tube line 169 with the port 192 of the pilot.
As seen in FIGURES l and 2, the inlet or pressure port 96 of the pilot is connected by a tube line 116 with the entrance chamber 313 of the control valve housing, and for this purpose the top Wall 15 ofthe housing has a tapped hole 1,11 leading into the chamber 33 to receive a fitting 112 for the t-ube line 11G. The drain or exhaust port 97 of the pilot can be connected in similar fashion either with the drain chamber 39 of the control valve or with a separate drain line leading to a seweror vthe like.`
In the service position of .rotation of the pilot spindle, and with the various ports of the pilot opening to the bore 91 thereof in the manner seen in FIGURE 6, fluid r 3,1sr,771
operating O ring seal H4 on the adjacent-extremity of the spindle. Since the pilot port 9S also communicates` with this zone and with the diaphragm chambers of the top drain and bottom tank Valve units which lgovernV the internal ports 57 and 60, those ports of the control` valve will be closed by the movable valve elements 63 associated therewith. Fluid under pressure in the Vspace between the O ning seal M4 and the angled land 93 of the vrpilot is also conducted tothe space in the pilot bore between the two lands 94 and 95, through a bridging passage in thespindle having an axially extending portion M5 with branches lid at its ends. `The pilot port 101 for the diaphragm chamber of the bottom drain Valve governing the internal port 5S also opens tothe space between lands 902- and 95, and port 5S will thus be closed by its valveunit. In addition, pilot port 192 which connects with the cylinder of the by-pass valve "itl willV also be pressurized so that the` port 69 of the by-passvalve will be closed by the piston 7l of the by-passvalve.
The two remaining ports 99 and litt) of the pilot are vented through the kexhaust pour 97 in the service position of the pilot shown in FIGURE 6. This is accomplished by means of a diagonal bore 11S through the pilot spindle, .which communicates the exhaust port S7 with the space between the two left hand lands 93 and 94 into lwhich the pilot ports 99 and 160 open. Consequently, since the diaphragm chambers of the service valve unit governing the internal port 59 of the control valve, as well as the diaphragm chamber for the top tank valve unit governing internal port 61 of the control valve are communicated with pilot ports 99 and 160 in the service position of the pilot spindle, water under pressure lifts the movable valve elements 63 off of theV seats of their respective ports 59 and 61 to allow the desired downiiow service operation of the system.
The table shown in FIGURE 7 designates which of the internal ports of the main or control valve mechanism are opened and which are closed by the pilot valve during service as well as regenerating operation of. the softener system. Each of the service, brine, backwash and rinse operations is achieved in a different one of the four angular positions of the pilot spindle, and it will be appreciated that the pilot ports and lands are so arranged as to effect closure and opening of the designated main valve ports in the manner `specified in the table.
It should be observed, however, that a preliminary or slow rinsing step can be achieved during regeneration, im-
mediately following the brining step, by maintaining the pilot spindle in the brining position for a suitable period of time` after all of the brine has been educted `from the brine tank, since at such time, clear hard water will ow through the injector and downwardly through the softener tank to rinse brine therefrom.
The brining and slow rinse steps of a regenerating cycle are terminated and a backwashing operation initiated at the dictation of the timing device, which functions to energize the spindle drive motor 11 for a period sufficient to advance `the pilot spindle to a Vposition displaced lSO" from that seen in FIGURE 6. During backwvashing, the diaphragm chambers of the top drain and bottom tank valve units which govern the internal ports 57 and 6i), respectively, w-i-ll be vented through the Ypilot exhaust port 97, so that ports 57 and 66 will be open. At the same time the service and top tank valve units governing internal ports S9 and 61, respectively, will have their diaphragm cham-bers pressurized by the pilot valve so that their respective main valve ports will be closed. Similarly, the diaphragm chamber of the `bottom drain valveassociated with the internal port 5S :of the'main valve will have its diaphragm chamber pressurized so that the port 58 will be closed.
Consequently, backwash water flows from the main inlet compartment 43, through port 60 tothe bottom tank Y Backwash effluent issuing from the top of the softener chamber 37, 'and through the external Vport 27 in the bottom of the valve to the bottom of the softener tank.
tank is returned to the upper tank chamber 35, from whence it flows through the upper drain port 57 to the drain chamber 39,v for discharge to waste lthrough the drain outlet 29.
After a suitable period: of backwashing, the timer` mechanism againeffects reenergizing of the electric motor li to advance the pilot spindle another one-quarter turn in the same direction of rotation, to initiate the rinsing or fast flushing as the final step of a regenerating cycle, during which any brine and calcium and/ or magnesium chlorides remaining in the water softening tank are purged therefrom. Vhile the backwashing operation, as customary, was conducted by fiowing fresh water upwardly through the softener tank, the rinsing step is accomplished by owing fresh water downwardly through the water softening tank.
. In the position of the pilot spindle at which rinsing is effected, the pilot effects pressurization of the diaphragm chambers of the top drain valve, the bottom tank v-alve, and the servicevalve units, respectively, associated with the internal ports 57, titi and 59 so rthat those ports will be closed. The pilot also effects venting of the diaphragm chambers of the top tank valve and the bottom drain valve units, respectivelyassociated with the internal ports 61 and 53, so that those ports will be open during the rinsing step of the regenerating cycle.
After a suitable period of rinsing, which is of aufhcient duration to assure purging of all brine and calcium or magnesium chlorides from the water softener tank, the timer mechanism again functions to reenergize the electric motor to cause return of the pilot spindle to its position seen'in FIGURE 6, thus restoring thesystem to service operation.
ln communities or states where it is illegal to discharge backwash water directly on the ground or into dry wells or the -likethe main valve housing may be modified as indicated in FGURE 5, by the provision of a horizontal partition member 12) in the drain chamber S9, at a level just above the drain port Z9 therein, along with a second drain port 29, to serve as an outlet for the upper one of the two drain compartments thus formed by the partition member 26. The outlet 29 may be connected by means of a duct (not shown)l with an evaporating tank or the like into which the backwash water may fiow during the regenerating cycle. Such backwash water, of course, enters the top tank port 25 of the main valve housing, flows into the upper tank chamber 35 and through the then open port 57 into the upper drain chamber 123, and outthrough the backwash discharge port 29 rather than through the port @heretofore described..
From the foregoing description together with the accompanying drawings, it will be evident to those skilled in the art that this invention provides a control valve mechanism which is especially well adapted for pilot operation inan automatic water-softening system, and wherein the service, brining, backwashing and rinsing operations are eiciently governed by only five valve units incorporated in a compact housing for the mechanism.
What is claimed as my invention is:
1.- In a control valve for water treating Vsystems of the type having a treatmenttank with top and bottom flow ports therein:
(A) a housing having (l) opposite upright front and back walls, (2) an upright wall closing one endtof theV housing and4 having (a) an inlet port in an upper portion thereof,
and t l (b) a service. port below the inlet port, (3) an upright wall closing the opposite end of the housing and having (a) a drain port therein,
(4) top and bottom walls respectively having (a) a top port to connect with the top flow port of a treatment tank, and (b) a bottom port to connect with the bottom flow port `of a treatment tank;
(B) partition members in the housing cooperating with the walls thereof to define (l) an inlet chamber having one portion thereof inwardly adjacent to and communicated with the inlet port, and having a main portion thereyof centrally of and on the back Wall or the housing, and defined in part by a rst upright one of said partition members that is in spaced opposing relation to both the front and back Walls of the housing,
(2) a service chamber inwardly adjacent to and communicated with the service port, and extending downwardly therefrom to the bottom of the housing,
(3) top and bottom tank chambers spaced from the ends of the housing and located respectively above and below the main portion of the inlet chamber, but having portions directly ahead of the latter and separated therefrom by said rst upright partition member, said bottom tank chamber having a portion directly adjacent to the service chamber, and
(4) a drain chamber at said opposite end of the housing having portions directly adjacent to said top and bottom tank chambers and defined in part by a second upright one of said partition members that is common to the main portion of the inlet chamber and both of said tank chambers;
(C) means on said partition members dening a number of ports each of which provides an annular valve seat that faces an external Wall of the housing,
(1) a rst one of said ports being in said lirst upright partition member and communicating the main portion of the inlet chamber with the top tank chamber,
(2) a second one of said ports also being in said first upright partition member but communicating the main portion of the inlet chamber with the bottom tank chamber,
(3) a third one of said ports being in said second upright partition member and communicating the top tank chamber with the drain chamber, (4) a fourth one of said ports communicating the bottom tank chamber with the service chamber, and being in a partition member common to said chambers, and (5) a fifth one of said ports, also in said second upright partition member, communicating the bottom tank chamber with the drain chamber; (D) separate valve members in the housing cooperatively associated with each of said ports and movable toward and from port closing engagement with the seat provided thereby; and Y Y (E) valve actuating means mounted on external walls of the housing and operatively connected with each of said valve members.
2. The control valve of claim 1, wherein the back wall of the housing has two ports therein, one opening from the top tank chamber, and the other opening from the main portion of the inlet chamber, and further characterized by:
(A) means connected with the housing and providing a duct that communicates the inlet chamber With the top tank chamber through said back Wall ports, said duct having a hole in a side thereof, and
(B) an injector in said duct, in eductive relation to said hole, having its inlet at all times in communication with the inlet chamber through said other back wall port and its outlet at all times in communication with the top tank chamber through said first designated back wall port, and through which injector Water along Y with fluid educted into said duct through said hole therein is delivered to the top tank chamber in consequence of closure of said rst and second ports -for the main portion of the inlet chamber by their respective valve elements.
References Cited by the Examiner UNITED STATES PATENTS REUBBN FRIEDMAN, Primary Examiner.
HERBERT L. MARTIN, Examiner.