Cock for valve and valve equipped with cock for valve

Abstract

A tap (100) for a valve having at least one opening for the passage of a fluid, the tap comprising a body (110) configured to be movably attached to a valve seat of the valve, and at least one seal (130) fixed to the body (110) and configured to differentially open and close an opening depending on the position of the tap in the valve seat, the seal (130) being fixed to the body (110) by an insert (140) fitted between the seal (130) and the body (110). The valve is in particular a three-way valve and / or a diverter valve, and is provided with a tap.

Description

[Technical field]

[0001] The present disclosure relates to valves, and in particular to valve cocks, which may be used in the field of switching valves, such as those used for filter maintenance, but also in other types of valves. [Background technology]

[0002] Valves with rotatable stopcocks have been known for many years. Typically, the valve body and the rotatable stopcock are both made of metal, and fluid tightness between the valve body and the rotatable stopcock is achieved simply by having as small a clearance as possible between the valve body and the rotatable stopcock.

[0003] In an attempt to improve fluid tightness, document WO87 / 00598A1 discloses a four-position valve comprising a valve body having several openings and a rotatable closure member, also known as a rotatable stopcock. A gasket is provided on one side of the stopcock to prevent leakage when the stopcock closes an opening. The gasket is held in place by an external member. Summary of the Invention [Problem to be solved by the invention]

[0004] Although this system has been satisfactory, there is still room for improvement. For example, the outer member itself may not remain in the desired position, especially in small valves. Thus, after a long period of use of the valve, the fit between the outer member and the gasket may become loose, which may cause the gasket to shift position in its seat, or the outer member may protrude radially beyond the gasket. This may affect the sealing function of the valve during long-term operation.

[0005] As a result, there is a need for a faucet that can prevent leakage in a more reliable manner. [Means for solving the problem]

[0006] Such a problem is solved by a tap according to claim 1. In one aspect, the disclosure relates to a tap valve having at least one opening for the passage of a fluid, the tap comprising a body configured to be movably mounted on a valve seat of the valve, and at least one seal fixed to the body and configured to variably open and close the opening depending on the position of the tap in the valve seat, the seal being fixed to the body by an insert fitted between the seal and the body.

[0007] The fluid may be a liquid or a gas, in particular water or oil. The valve may have at least two openings for the passage of the fluid, i.e. at least one inlet opening and one outlet opening. The openings may be located near the valve seat of the valve, so that the tap, in particular its seal, is configured to variably open and close at least one of said openings depending on its position. In this embodiment, the body of the tap may be rotatably mounted on the valve seat of the valve, and the seal may be configured to variably open and close the opening depending on the angular position of the tap within the valve seat. In another embodiment, the body may be slidably mounted on the valve seat, and the seal may be configured to variably open and close the opening depending on the longitudinal position of the tap within the valve seat.

[0008] The seal may take the form of a gasket. The seal may be made of an elastomeric material. As an elastomer, the seal can deform and conform to the shape of the valve seat around the opening, thereby providing a satisfactory seal without leakage. In other embodiments, the seal may be made of a material configured to undergo break-in by actuation of a tap within the valve body. With such materials, break-in allows for a very close fit between the shape of the seal and the shape of the body, thereby providing a satisfactory seal without leakage. For example, the seal may be made of plastic.

[0009] The faucet may be provided with multiple seals (eg, if the faucet, in one position, is required to seal multiple openings simultaneously).

[0010] As mentioned above, the seal is fixed to the body by an insert that fits between the seal and the body. When the faucet includes several seals, this may apply to some or all of them. That is to say, the fixing means between the seal and the body includes an insert. The insert may be made of a material other than the seal, for example a plastic or a metal (including alloy), in order to provide a robust fixation between the seal and the body. The insert is fitted between the seal and the body, especially in a geometrical sense. That is to say, at least a part of the insert may have a first side in contact with the seal and a second side opposite the first side in contact with the body. The seal and the body may extend beyond the first and second sides, respectively.

[0011] With the above-mentioned structure, the seal is reliably fixed to the body via the insert, and the insert does not need to protrude beyond the seal toward the opening, so leakage is reliably prevented.

[0012] In some embodiments, the seal is assembled to the insert and the insert is fixed to the body. Thus, the seal, the insert and the body are distinct parts that are paired and exhibit an interface therebetween. The fastening means between the insert and the seal may include corresponding form engagement, overmolding, bonding, e.g. via adhesive, etc. The fastening means between the insert and the body may include corresponding form engagement, bonding, e.g. via adhesive, screws, etc.

[0013] In some embodiments, the insert is removably attached to the body, so that when the seal wears, it can be easily replaced by removing just the insert with the seal, fitting either the old insert or a new insert, and securing the new seal to the old body.

[0014] In some embodiments, the means for fixing the insert to the body is accessible from the opposite side of the body to the seal. For example, the means for fixing the insert to the body may be accessible from the opposite longitudinal side of the body to the seal or from the opposite radial direction (i.e. perpendicular to the axial or longitudinal direction) to the body to the seal. In these embodiments, the means for fixing is not accessible on the sealing surface between the seal and the valve seat. This ensures that the means for fixing does not protrude beyond the seal to the valve seat and interfere with the sealing function of the valve.

[0015] In some embodiments, the insert has an undercut to limit separation of the insert from the seal. The undercut may be provided at the interface between the seal and the insert. The undercut in the insert may be adjacent to a portion of the seal (and possibly the undercut) to resist some action tending to separate the seal from the insert, thereby more securely assembling the seal to the insert.

[0016] In some embodiments, the undercut comprises a negative draft of the seal cavity that the insert fits into. The draft is easy to manufacture and provides a large surface area for the undercut, which further improves reliability.

[0017] In some embodiments, the insert has at least one threaded hole. The hole may be a through hole or a blind hole. A threaded rod, e.g., a screw, may be inserted into the threaded hole of the insert to fix the insert to the body of the faucet. The body may have a hole at a corresponding position, the hole may be threaded, or the body may be sandwiched between the insert and another member, e.g., a screw head or a bolt.

[0018] In some embodiments, the insert retains at least a portion of the seal under a compressive load, i.e., the insert compresses a portion of the seal, for example, by pinching such portion between the insert and the body, and thus the position of the seal relative to the body is well controlled and maintained.

[0019] In some embodiments, the seal extends beyond the insert relative to the body. In other words, the seal may have a protruding portion that protrudes beyond one side of the insert to be secured to the body. When the insert is secured to the body, the protruding portion must deform so that the insert retains the protruding portion of the seal under compression. In addition to providing more control over the location of the seal relative to the body, the protruding portion may be provided at the interface between the seal and the body, whereby the protruding portion enhances sealing and helps to avoid fluid penetration between the body and the insert.

[0020] In some embodiments, the body extends along a longitudinal direction and includes a longitudinal wall, the seal and the insert are attached to one side of the longitudinal wall, and the other side of the longitudinal wall defines the fluid flow path. This structure is simple and efficient to manufacture.

[0021] In some embodiments, the vertical wall is offset relative to the axis (e.g., axis of rotation) of the body. Preferably, the vertical wall is offset relative to the seal, thus allowing more space for the passage of fluid, resulting in reduced pressure loss through the valve.

[0022] In some embodiments, the seal may have a closed contour surrounding the insert. In these embodiments, the undercuts described above may, for example, hold the insert within the seal so that the seal and the insert do not separate from one another, thereby providing additional reliability to the faucet. More generally, the seal may define a blind cavity into which the insert fits, said cavity opening towards the inside of the body.

[0023] In some embodiments, the entire surface of the insert is exposed to either the seal or the body, i.e. the insert has no surfaces exposed to the fluid, in this way the sealing between the insert and the seal on the one hand and the insert and the body on the other hand is improved and therefore the operation of the faucet as a whole is more reliable.

[0024] In some embodiments, the seal comprises a protruding sealing lip configured to surround the opening of the valve. Because the sealing lip is configured to surround the opening and does not need to conform to the exact shape of the opening, a single sealing lip can be used for a variety of opening shapes. Additionally, the compression of the sealing lip can be precisely controlled, thereby enhancing sealing performance.

[0025] In some embodiments, the faucet comprises a plurality of said seals and a plurality of said inserts, each of the plurality of seals assembled with a corresponding one of the plurality of inserts to form a seal insert set, the seal insert sets being separated from each other in the longitudinal direction of the body by respective transverse bulkheads of the body. Each seal insert set may have some or all of the above-mentioned features. This type of faucet is useful for multi-stage valves such as double and triple valves. The transverse bulkheads can separate the sealing function of each seal insert set, thereby allowing different shapes and different position configurations for each set and each stage, as well as partial replacement and maintenance of the faucet. The faucet body itself may comprise a plurality of assembled faucet members, each of which is associated with a corresponding seal insert set.

[0026] In another aspect, the present disclosure also relates to a valve, in particular a three-way valve, comprising a stopcock as previously described.

[0027] In yet another aspect, the present disclosure provides a method for producing a method for manufacturing a semiconductor device comprising: a primary fluid inlet and first and second secondary fluid outlets; a primary fluid outlet, and first and second secondary fluid inlets; The aforementioned cook, the transverse bulkhead is provided with sealing members for isolating the primary fluid inlet, the first secondary fluid outlet, and the second secondary fluid outlet from the primary fluid outlet, the first secondary fluid inlet, and the second secondary fluid inlet, the cock is configured to variably allow passage of fluid from the primary fluid inlet to the first secondary fluid outlet and / or the second secondary fluid outlet depending on the position of the body, and is configured to variably allow passage of fluid from the first secondary fluid inlet and / or the second secondary fluid inlet to the primary fluid outlet depending on the position of the body. The switching valve is an example of a double valve (or two-stage valve) as described above, the first stage includes the primary fluid inlet, the first secondary fluid outlet, and the second stage includes the primary fluid outlet, the first secondary fluid inlet, and the second secondary fluid inlet. [Brief description of the drawings]

[0028] The invention and its advantages will be better understood on reading the following detailed description of embodiments of the invention, given by way of non-limiting example, which description makes reference to the accompanying drawings, in which: [Figure 1] FIG. 1 is an exploded perspective view of a cock according to a first embodiment; [Figure 2A] Cross-sectional view along the IIA-IIA plane in Figure 1 [Figure 2B] Cross-sectional view along the IIB-IIB plane in Figure 1 [Diagram 3] FIG. 11 is a perspective view of a cock according to a second embodiment; [Figure 4] Cross-sectional view taken along the plane IV-IV in FIG. [Diagram 5] FIG. 1 is an exploded perspective view of a switching valve having a cock according to a first embodiment; [Figure 6A] FIG. 6A is a perspective cross-sectional view taken along plane VI in FIG. 5, showing the flow of fluid in the switching valve according to the position of the cock. [Figure 6B] FIG. 6B is a perspective cross-sectional view taken along plane VI in FIG. 5, showing the flow of fluid within the switching valve according to the position of the cock. [Figure 6C]FIG. 6C is a perspective cross-sectional view taken along plane VI in FIG. 5, showing the flow of fluid within the switching valve according to the position of the cock. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] The faucet 100 in the first embodiment is described in relation to Figs. 1, 2A and 2B. The faucet 100 may be used in a valve having at least one opening for the passage of a fluid, which will be described in detail later. In this embodiment, the faucet 100 is adapted to a two-stage valve and comprises a first stage part 102 and a second stage part 103. The first stage part 102 and the second stage part 103 are stacked in this case along the longitudinal or axial direction X of the faucet 100. As can be seen in Fig. 1, in this embodiment, the first stage part 102 and the second stage part 103 are similar, and therefore only the first stage part 102 will be described. The second stage part 103 may have none, some or all of the features of the first stage part 102. In addition, faucets with only one stage or two or more stages are also conceivable. Sealing members 104, 105, here in the form of O-rings, may be provided to separate the stages from each other.

[0030] The faucet 100 comprises a body 110 configured to be movably mounted on a valve seat, where the body 110 extends generally along a longitudinal direction X and is adapted to be rotatably mounted on the valve seat about its longitudinal axis X. The faucet 100 may comprise a key 112, either integral with the body 110 or provided as a separate part secured thereto, for controlling rotation of the body 110. In this embodiment, the key 112 is provided at one end of the body 110 in the longitudinal direction.

[0031] The body 110 comprises a vertical wall 114 along a longitudinal direction X. As can be seen more clearly in Figures 3 and 4, which relate to other embodiments but are similar in that respect, the vertical wall 114 is offset with respect to the axis of rotation X of the body 110. The vertical wall 114 may be defined here by transverse partitions 116 at either end of the vertical wall 114. The transverse partitions 116 may extend radially, i.e. perpendicular to the longitudinal axis X. The aforementioned sealing members 104, 105 may be provided on the transverse partitions 116 or at their ends.

[0032] Thus, each stage of the body 110 defines a passageway for fluids on one side of the vertical wall 114 (here, the side of the vertical wall 114 close to the vertical axis X) and a housing for mounting the seal insert set 120 on the other side of the vertical wall 114. In this embodiment, mounting of the seal insert set 120 is achieved by fastening means (e.g., screws 122, etc.) that engage with through holes 118 of the body 110 and are fastened to corresponding means (e.g., screw holes 124, etc.) of the seal insert set 120. Here, the through holes 118 extend substantially radially through the vertical wall 114. In Figs. 1, 2A and 2B, three through holes 118, screws 122 and screw holes 124 are represented on each stage, but a different number may be selected by the skilled person. The fastening means may be regularly or irregularly arranged along the vertical axis, aligned or not aligned. Other fastening means, disassemblable or non-disassemblable, are also possible.

[0033] The seal insert set 120 includes a seal 130 and an insert 140. The seal 130 may be an elastomeric or resilient seal. For example, the seal 130 may be made of at least one of polytetrafluoroethylene (PTFE), nitrile butadiene rubber (NBR), fluoroelastomer (e.g., fluorocarbon-based such as FKM or FPM), ethylene propylene diene monomer (EPDM) rubber, and the like. The hardness of the seal 130 may range from 60 to 90 Shore A. However, other materials may be considered for the seal 130 depending on the application.

[0034] The seal 130 is configured to be secured to the body 110, and in particular to a housing defined on one side of the vertical wall 114. Thus, as the body 110 rotates, the seal 130 variably opens and closes, either partially or fully, the valve opening.

[0035] To provide a secure fixation between the seal 130 and the body 110, the insert 140 is provided to be fitted between the seal 130 and the body 110. That is, the seal 130 is fixed to the body 110 via the insert 140. Removal of the insert 140 causes the seal 130 and the body 110 to be independent of each other.

[0036] In this case, the insert 140 is made of a metal, for example steel. However, other materials, such as plastic, are also contemplated. In this embodiment, the seal 130 is overmolded onto the insert 140. In this case, the insert 140 should include or be made of a material that will withstand the overmolding of the seal 130. Of course, other techniques for assembling the seal 130 to the insert 140 are also included, and different requirements for the seal 130 and the insert 140 may be included.

[0037] To improve adhesion between the seal 130 and the insert 140, the surface of the insert 140 that contacts the seal 130 may be sandblasted or otherwise roughened (e.g., knurled) prior to assembly of the seal 130 and the insert 140. More generally, the insert 140 may have a rougher surface that contacts the seal 130 compared to other surfaces, such as the surface that contacts the body 110.

[0038] Additionally, to prevent the seal 130 from separating from the insert 140, the insert 140 may have an undercut 142. For example, as shown in FIG. 2A, the insert 140 may have a trapezoidal cross-section, with its slanted sides contacting the seal 130, with the smaller base of the trapezoidal cross-section closer to the body 110 than the larger base of the trapezoidal cross-section. When the seal 130 is overmolded onto the insert 140, the material of the seal conforms to the shape of the undercut 142, thereby forming a corresponding undercut 132 in the seal 130 against which the insert 140 is retained.

[0039] Thus, in this embodiment, the undercut 142 comprises a negative draft angle A of the cavity of the seal 130 into which the insert 140 fits. For example, the draft angle A may range from 2° to 15°. Other forms of undercuts are possible.

[0040] 2A, Fig. 2B shows that the cross section of the insert 140 along a transverse plane (i.e. along a plane perpendicular to the longitudinal axis X) may be rectangular or, more generally, may be free of undercuts. As a variant, it is conceivable that the sides with and without undercuts are interchanged, or that the insert 140 has undercuts to limit the separation of the insert 140 from the seal 130 on all or only some of its sides.

[0041] The threaded holes 124 are provided in the insert 140, which is generally made of a harder material than the seal 130. Thus, the insert 140 provides a more secure fixation of the seal 130 to the body 110. Furthermore, the insert 140 is removably attached to the body 110 by the screws 122, and other fixing means may provide a similar function. Rivets or the like may be used as fixing means, but they would prevent the insert 140 from being removed. In this embodiment, the threaded holes are radially extending blind holes in the insert 140, but they may also be through holes and / or extend in any suitable direction, depending on the length of the thread required.

[0042] As described above, the seal 130 is assembled to the insert 140 , and the insert 140 is fixed to the body 110 .

[0043] As shown in FIG. 2B, in this embodiment, the seal 130 extends beyond the insert 140 towards the body 110. In particular, the seal 130 may comprise a protruding portion 136 directly in contact with the body 110. The protruding portion 136 has a non-zero thickness e in the mounting direction (here transversely) measured from the end of the insert 140 closest to the body 110 to the end of the seal 130 closest to the body 110 between the seal-insert. The thickness e may be in the range of 0.1 mm to 2 mm, preferably in the range of 0.2 mm to 1 mm. Because the protruding portion 136 protrudes, when the insert 140 is mounted to the body 110, the protruding portion 136 is compressed between the body 110 and the remainder of the seal 130. Depending on the tightening of the screw 122 or the like, the protruding portion 136 may be more or less pinched between the remainder of the seal 130 and the vertical wall 114 and therefore is subjected to a compressive load.

[0044] A similar compression could be obtained without the protruding portion 136 of the seal 130, but with a protruding portion of the body 110, e.g., a portion protruding toward the seal 130 beyond the distance available at rest. Thus, the protruding portion of the body 110 would place the seal under compression in a similar manner. However, this variation may make the manufacture of the body 110 more complicated and, as a result, more expensive.

[0045] In either case, as shown in Figure 4 in a related but similar respect to another embodiment, the entire surface of the insert 140 is exposed to either the seal 130 or the body 110, such that the insert 140 has no surface exposed to the fluid. Specifically, the radially outer and lateral surfaces of the insert 140 are exposed to the seal 130, while the radially inner surface of the insert 140 is exposed to the body 110. Other arrangements are possible.

[0046] 1, the means for fastening the insert 140 to the body 110, i.e., the screw 122, is accessible from the side of the body 110 opposite the seal 130. In particular, the screw 122 is accessible from the side of the vertical wall 114 opposite the seal 130. In this way, the seal 130 is radially further outboard than the insert 140 and the screw 122. Therefore, neither the insert 140 nor the fastening means between the seal 130 and the body 110 interferes with the sealing function of the faucet 100.

[0047] 3 and 4 show a cock in another embodiment. In these figures, elements corresponding to or identical to those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

[0048] The faucet 100 in the second embodiment will be described with reference to Figures 3 and 4. The faucet 100 is a single-stage faucet, but the body 110 may be provided with mounting means such as at least one bolt 106 for assembling other similar bodies, so that a multi-stage faucet can be obtained. However, as shown in connection with the first embodiment, the body of a multi-stage faucet may also be manufactured as a single piece. The bolts 106 may extend through respective holes in adjacent transverse bulkheads 116 of the respective bodies.

[0049] To secure the seal 130 to the body 110, the seal 130 is first assembled to the insert 140, for example by overmolding. The seal insert set 120 is then placed in the housing, i.e., along the vertical wall 114 and between the transverse bulkheads 116. The screw 122 is screwed into the through hole 118 and the screw hole 124 of the body 110 from the side of the vertical wall 114 opposite the seal insert set 120. It should be noted that in this embodiment, the through hole 118 of the body 110 is configured to receive the head of the screw so that the screw 122 does not protrude beyond the vertical wall 114 so as not to obstruct the flow of fluid through the valve.

[0050] As an alternative to or in addition to the screws 122, at least one spring may be provided between the seal insert set 120 and the body 110 to bias the seal 130 against the opening it is sealing (i.e., away from the body 110). For example, the spring may include one or more spring washers disposed around the screws 122 in the gap between the body 110 and the insert 140.

[0051] 4, and perhaps implicit in the previous embodiments, the housing side of the vertical wall 114 may be shaped (e.g., by machining, etc.) to define a desired shape of the housing. For example, the vertical wall 114 may have a U-shape in cross section (see U-shape in FIG. 4) and / or may have protrusions configured to fix the position of the seal insert set 120 with respect to rotational movement of the body, here tangentially, e.g., about the vertical axis X.

[0052] The faucet 100 may be used in a valve as shown in FIG. 5. FIG. 5 shows a valve 80 having at least one opening, i.e. two three-way valves known as diverter valves. The diverter valve 80 has two stages 82, 83, each stage being provided as a three-way valve. That is, for the first stage, the diverter valve 80 comprises a primary fluid inlet 82I, a first secondary fluid outlet 82A (see FIG. 6A) and a second secondary fluid outlet 82B. For the second stage 83, the diverter valve 80 comprises a primary fluid outlet 83O, a first secondary fluid inlet 83A and a second secondary fluid inlet 83B. That is, the fluid openings of the switching valve are comprised of a primary set (primary fluid inlet 82I and outlet 82O), a first secondary set or A set (first secondary fluid inlet 83A and outlet 82A), and a second secondary set or B set (second secondary fluid inlets 83B and 82B).

[0053] The switching valve 80 further includes a tap 100 according to the first embodiment, although tap embodiments such as the second embodiment or other embodiments may be used instead.

[0054] The tap 100 is rotatably mounted on the diverter valve 80 in a manner known to those skilled in the art. The tap key 112 is provided with a protrusion 113 that can abut against the stopper 84 of the valve body, thereby defining the range of rotation of the tap within the valve seat. As shown in FIG. 1, an indicator (e.g., an arrow, etc.) may be provided on the key 112, here on the protrusion 113, to show in which position the tap 100 is in relation to the markings A, AB, B, etc. on the valve body. The tap 100 may be configured to remain in an intermediate position, thereby providing partial opening and closing of the inlet or outlet.

[0055] The use of the diverter valve 80 is illustrated in Figures 6A, 6B, and 6C, which show the fluid flow within the first stage of the valve 80. In Figure 6A, the faucet 100 is in position A, which means that the A set of openings is open and the B set of openings is closed. As can be seen in this figure, the seal 130 seals off the second secondary fluid outlet 82B, for example via a sealing lip 138.

[0056] In particular, as previously described, the seal 130 may include a protruding sealing lip 138 configured to surround an opening in the valve, such as the second secondary fluid outlet 82B and the first secondary fluid outlet 82A. The sealing lip 138 may be tapered toward the opening (e.g., away from the insert 140) to enhance compression capabilities. As shown in Figures 2A, 2B, and 6A, a smooth transition between the sealing lip 138 and the remainder of the seal 130 may be provided to accommodate deformation of the sealing lip 138. In addition to the above benefits, the chamfer aids in proper positioning against the valve seat of the faucet.

[0057] Although one sealing lip 138 is shown, multiple sealing lips may be provided that continuously surround the opening and / or are adapted to various opening sizes and shapes. Additionally, a prestressing element (e.g., a V-shaped spring, etc.) may be embedded in the seal 130, e.g., beneath the sealing lip 138, to more precisely bias the sealing lip 138 against the valve body.

[0058] As seen in the enlarged portion of FIG. 6A, the opening 82B1 of the valve seat leading to the second secondary fluid outlet 82B may be recessed with respect to the opening / closing path P of the sealing lip 138 (i.e., the path of the sealing lip 138 when the faucet 100 is actuated to open and / or close the second secondary fluid outlet 82B). This avoids the sealing lip 138 being damaged by sharp corners, and instead provides a transition portion 84 between the opening / closing path P of the sealing lip 138 and the opening 82B1, which is configured to gradually compress the sealing lip 138 as it is moved along the transition portion 84. The transition portion 84 may have an intermediate orientation between the opening / closing path P of the sealing lip 138 and the opening 82B1.

[0059] Some or all of these features may be applied to some or all of the openings that the sealing lip 138 is intended to isolate under certain operating conditions.

[0060] In position A of FIG. 6A, fluid may flow from the primary inlet 82I to the first secondary fluid outlet 82A and from the first secondary inlet 83A to the primary outlet 83O. In this configuration, the switching valve 80 may direct fluid from the flow paths to the main filter mounted on the A side of the valve. Maintenance of the main filter may be required without interrupting the treatment of the fluid flowing through the flow paths. For this purpose, the tap 100 may be rotated through position AB shown in FIG. 6B to position B shown in FIG. 6C. In this way, the flow of fluid may be gradually and uninterruptedly diverted from the main filter connected to the openings of the A set to the openings of the B set to which the auxiliary filter may be connected. The tap 100 seals the first secondary fluid outlet 82A and the first secondary fluid inlet 83A, so that the main filter can be removed from the switching valve 80. Once the main filter has been maintained and reattached, the reverse action allows the fluid to flow back to the main filter or the auxiliary filter to be maintained.

[0061] It should be noted that since the first step 82 is used for filtering fluid and the second step 83 is used for the filtered fluid, proper sealing between the two steps is advantageous. Sealing members such as O-rings 104, 105 can be useful in this regard. More generally, the first step 82 and the second step 83 are sealed from each other and they can be designed and handled differently, both from the tap point of view and from the valve body point of view.

[0062] Additionally, the seals in contact with unfiltered fluid will wear out faster than the seals in contact with filtered fluid. In this regard, as explained above, it is advantageous that each seal can be replaced independently of the other.

[0063] The diverter valve 80 may be used for different fluid flows and / or other applications. As previously discussed, the different embodiments and variations of the faucet 100 may be used with different types of valves.

[0064] Although the present invention has been described with reference to certain exemplary embodiments, modifications may be made to these examples without departing from the general scope of the invention as defined by the claims. For example, in the illustrated embodiments, the faucet is described as rotating, but those skilled in the art will recognize that similar advantages can be obtained in valves where the faucet is slidably mounted, and such embodiments are also included. In addition, although several materials have been described, other materials may be envisioned depending on the requirements of the intended application. More generally, individual features of different illustrated and described embodiments may be combined in additional embodiments. The present specification and drawings are therefore to be considered in an illustrative rather than restrictive sense. [Explanation of symbols]

[0065] 80 Valve 82 First Stage 82A 1st secondary fluid outlet 82B Secondary fluid outlet 82B1 opening 82I Primary fluid inlet 83 Second Stage 83A First secondary fluid inlet 83B Second secondary fluid inlet 83O Primary fluid outlet 100 Cook 102 1st stage part 103 Second stage part 104 Sealing material 105 Sealing material 106 Volts 110 Main unit 112 Keys 113 Protrusion 114 Vertical Wall 116 Transverse bulkhead 118 Through hole 120 Seal Insert Set 122 Screw 124 Screw hole 130 Seals 132 Undercut 136 Protruding part 138 Sealing Lip 140 Insert 142 Undercut X vertical direction

Claims

1. A cock (100) for a valve (80) having at least one opening for the passage of a fluid, comprising: The cock is a body (110) configured to be movably attached to a valve seat of the valve (80); at least one seal (130) secured to the body (110) and configured to variably open and close the opening depending on the position of a tap within the valve seat; Equipped with The seal (130) is secured to the body (110) by an insert (140) that fits between the seal (130) and the body (110); The seal (130) is assembled to the insert (140); A faucet (100), wherein the insert (140) has a surface that contacts the seal (130) that is rougher than a surface that contacts the body (110).

2. The insert (140) is fixed to the body (110). The faucet (100) of claim 1.

3. The faucet (100) of claim 1 or 2, wherein the insert (140) is removably attached to the body (110).

4. 3. The faucet (100) of claim 1 or 2, wherein the means for fixing the insert (140) to the body (110) is accessible from a side of the body (110) opposite the seal (130).

5. The faucet (100) of claim 1 or 2, wherein the insert (140) has an undercut (142) for limiting separation of the insert (140) from the seal (130).

6. The faucet (100) of claim 5, wherein the undercut (142) comprises a negative draft angle (A) of a cavity of the seal (130) into which the insert (140) fits.

7. The faucet (100) of claim 1 or 2, wherein the insert (140) comprises at least one threaded hole (124).

8. The faucet (100) of claim 1 or 2, wherein the insert (140) retains at least a portion (136) of the seal (130) under a compressive load.

9. The body (110) extends along a longitudinal direction and includes a longitudinal wall (114); 3. The faucet (100) of claim 1 or 2, wherein the seal (130) and the insert (140) are attached to one side of the vertical wall (114), the other side of the vertical wall (114) defining a fluid flow path.

10. 10. The faucet (100) of claim 9, wherein the vertical wall (114) is offset with respect to the axis of rotation (X) of the body (110).

11. The faucet (100) of claim 1 or 2, wherein the entire surface of the insert (140) is exposed to either the seal (130) or the body (110).

12. The faucet (100) of claim 1 or 2, wherein the seal (130) comprises a protruding sealing lip (138) configured to surround the opening of the valve.

13. The cock (100) is A plurality of said seals (130); A plurality of said inserts (140); Equipped with each of the plurality of seals (130) is assembled with a corresponding one of the plurality of inserts (140) to form a seal insert set (120); 3. The faucet (100) of claim 1 or 2, wherein the seal insert sets (120) are separated from one another in the longitudinal direction of the body (110) by respective transverse bulkheads (116) of the body.

14. A valve (80), in particular a three-way valve, comprising the cock (100) according to claim 1 or 2.

15. a primary fluid inlet (82I), and first and second secondary fluid outlets (82A and 82B); a primary fluid outlet (83O), and first and second secondary fluid inlets (83A and 83B); A cock (100) according to claim 13, A switching valve (80) comprising: the transverse bulkhead (116) is provided with sealing members (104, 105) for isolating the primary fluid inlet (82I), the first secondary fluid outlet (82A), and the second secondary fluid outlet (82B) from the primary fluid outlet (83O), the first secondary fluid inlet (83A), and the second secondary fluid inlet (83B); The faucet (100) is configured to variably allow fluid to pass from the primary fluid inlet (82I) to the first secondary fluid outlet (82A) and / or the second secondary fluid outlet (82B) depending on the position of the main body (110), and is configured to variably allow fluid to pass from the first secondary fluid inlet (83A) or the second secondary fluid inlet (83B) to the primary fluid outlet (83O) depending on the position of the main body (110).

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