CA1198403A - Shut-off valve for high temperature erosive flow - Google Patents
Shut-off valve for high temperature erosive flowInfo
- Publication number
- CA1198403A CA1198403A CA000458927A CA458927A CA1198403A CA 1198403 A CA1198403 A CA 1198403A CA 000458927 A CA000458927 A CA 000458927A CA 458927 A CA458927 A CA 458927A CA 1198403 A CA1198403 A CA 1198403A
- Authority
- CA
- Canada
- Prior art keywords
- valve
- shut
- seat
- seating surface
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
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- Lift Valve (AREA)
Abstract
SHUT-OFF VALVE FOR HIGH
TEMPERATURE EROSIVE FLOW
ABSTRACT OF THE DISCLOSURE
A shut off valve for high temperature erosive flow is disclosed having a valve and a valve engaging or seating surface in which substantial erosion of an area beginning at its initial erosion point adjacent the valve seat does not erode the valve seating surface of the valve seat and the valve seating surface of the valve member to prevent closing of the valve or to cause leaks. The valve has limited but enough universal movement to be self-seating to accomodate thermal growth. The valve and valve seat can be removed from the valve without taking the valve off the line. A number of embodiments are disclosed.
TEMPERATURE EROSIVE FLOW
ABSTRACT OF THE DISCLOSURE
A shut off valve for high temperature erosive flow is disclosed having a valve and a valve engaging or seating surface in which substantial erosion of an area beginning at its initial erosion point adjacent the valve seat does not erode the valve seating surface of the valve seat and the valve seating surface of the valve member to prevent closing of the valve or to cause leaks. The valve has limited but enough universal movement to be self-seating to accomodate thermal growth. The valve and valve seat can be removed from the valve without taking the valve off the line. A number of embodiments are disclosed.
Description
TEMPERATURE EROSIVE FLOW
BACKGROUND OF THE INVENTION
There has been a serious erosion problem with valves used in high temperature erosive solid or fluid flow in that the valve seat or portions of the valve seat are eroded or abraded away ho the flow causing leaks and a failure of the valve to shut-off flow when desired. In addition, -there is a problem with valves used for high temperature erosive or abrasive flows to 10 provide adequate seating and hence sealing of the valve member on the valve seat due to thermal growth caused by the extremely high temperatures.
SUMMERY OF THE INVENTION
This application, being a division of Canadian Patent Application Serial No. 396,324 filed February 16, 1982 contains claims directed to only some aspects of the subject matter disclosed hereinbelow, The present invention is directed to a shut-off valve suitable for use for high temperature erosive flow such as in refineries in which considerable erosion of the flow passage adjacent the valve or a portion of the valve seat can and does take place without destroying the ability of the valve to effect-lively shutoff flow through the valve and to prevent leaks.
The present invention it also directed to such a valve which compensates for thermal growth of the valve so that an effective shut-off by the valve is provided under varying tempt erasure conditions. In addition, the present invention is dir-acted to such a valve for high temperature erosive flow and to accommodate thermal growth in which the valve seat and valve can by removed for repair or replacement without removing the valve from the line.
In short, the valve includes a body having a flow past sage through it, the flow passage including an enlarged internal chamber. The valve is arranged so that the seating surface of the valve seat and the seating surface of the valve member are beyond the initial erosion point and a substantial distance downstream - lo -1 thereof, a substantial erosion area of the valve, so that the shut-off valve effectively shuts-off flow through the valve even though there is substantial erosion of the flow passage or a portion of the valve seat itself.
The valve member is constructed and arranged so that its seating surface adjustable seats on the valve seating surface effective to compensate for thermal growth.
The valve is also constructed and arranged so that the valve seat, valve, and connecting and operable parts can be rev moved for repairs, replacements and the like without taking the valve off the line.
Accordingly, it is an object of the present invention to provide a shutoff valve for high temperature erosive flow in which substantial erosion o-f the flow passage adjacent the valve seat or of a portion of the valve seat itself does not prevent effective shutting-off of flow through the shut off valve.
A further object of the invention is the provision of such a valve in which the seating surface of the valve seat and valve member are beyond and out of the direct flow path of the erosive flow thrush the valve.
A further object of the present invention is the proviso of such a valve in which the seating surface of the valve member which seats on the valve seating surface automatically accommodates and adjusts for thermal growth due to the high temperature abrasive flow through the valve effective to provide a shut-off of flow under varying temperature conditions.
A further object of the present invention is the pro-vision of such a valve in which the valve seat, valve member, and connecting and operable parts are removable from the valve for replacement and repairs without removing the valve from the line.
Other and further objects, features and advantages will be apparent from the following description of presently preferred 1 embodiments of the invention given for the purpose of disclosure and taken in conjunction with top accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
, . .. . .... ..
Figure 1 is a plan view of the valve according to the present invention Figure 2 is a sectional view taken along the line 2-2 of Figure 1 and illustrating a presently preferred embodiment of the invention.
Figure 3 is an enlarged fragmentary view of the valve seating and valve member surfaces illustrating dosing and sealing with considerable erosion of the valve.
Figure 4 is a view similar to that of Figure 3 thus-treating a prior art valve arrangement and showing that the same amount or area of erosion as the valve in Figure 3 prevents shut off of flow through the valve.
Figure 5 is a sectional view taken along the section line 5-5 of Figure 2.
Figure 6 is a fragmentary view illustrating another embodiment of the valve illustrated in Figure 2.
Figure 7 is an enlarged fragmentary view illustrating the seating and sealing arrangement of the valve assembly of Figure 6.
Figure 8 is an enlarged view similar to Figure 7 thus-treating a modification of the valve of Figures 5 and 7.
DESCRIPTION OF PRESENTLY PREFERRED EMBODIMENTS
Referring now to the drawings, and particularly to Figure 1, a valve generally indicated by the reference numeral 10 is illustrated which is here shown as a powered shutoff valve in which the power cylinder arrangement 12 rotates a shaft 14 (not shown in this view but illustrated in Figures 2 and 5), for open-in and closing the valve.
1 Referring now to Figure 2, the valve lo includes the valve body 16 through which extends the flow passage 18 through the enlarged internal chamber 20 and out the downstream passage I
The flow passage 18 has what may be referred to for convenience as an entry 24 into -the enlarged internal chamber 20 of the valve body 16. A valve seat 26 is releasable secured to the entry 24 of the flow passage 18, such as by the bolts 28 against which a valve member 30 seats to shut off flow through the valve.
As best illustrated in Figure 3, there is what may be termed an initial erosion point 32 adjacent and upstream of the entry 24 where erosion caused by the erosive flow through the valve commences to occur. Normally, this erosion extends down-stream into the valve seat 26 and provides an area of erosion which begins at the initial erosion point 32 and erodes downstream and, as here shown, ends at the downstream erosion point 34. In the embodiment illustrated in Figures 2 and 3, the valve seat 26 has an outwardly tapering or conical valve seating surface 36 extending in the direction of flow and which is beyond in the direction of flow of the erosion area between the initial erosion point 32 and the downstream erosion point 34. The valve member 30 has a coating tapered or conical valve seating surface 38 which seats on the valve seating surface 35 beyond the erosion area as clearly illustrated yin Figure 3. Thus, although there is a sub-staunchly area of erosion of the flow passage and a portion of the valve seat 26, the valve member 30 effectively seats and seals on the valve 26 to effectively shut-off flow through the valve.
Referring now to Figure 4 in which the reference letter "a" is added to corresponding reference numerals of Figure 3 for convenience of reference, a prior art valve is illustrated in which the valve seating surface aye of the valve aye and the valve l l By 1 seating surface aye of the valve member aye are disposed Jo that the same area of erosion of -the valve illustrated in Figure 3 causes the valve seating surface aye to be exuded of the prior art valve so that the closing of the valve melnber aye does not effect-lively shut off flow through the valve and, accordingly the valve seat aye must be removed and replaced much sooner and hence much more often than a valve according to the present invention as illustrated in Figures 2 and 3, which greatly increases the ox-pens of maintenance, operation and shut down time of the valve.
Referring again to Figure 2, the drive shaft 14 for rotating the valve 30 into closed and open position is disposed in the enlarged internal chamber 20 and is offset from and out of the direct flow through the enlarged flow passage 20 and the discharge passage 22. In this connection, for convenience of reference, what is referred to as "direct" flow though the valve is a con-Tunisian of the tubular flow passage 18 through the enlarged internal chamber 20 and out the discharge 22.
As illustrated in Figures 2 and 5, a split sleeve 40 is disposed about the powered drive shaft 14 and is secured about it by means of the bolts 42 although the split sleeve 40 may be so secured in any desired manner As best shown in Figure 2, the keys or splints 44 are provided to prevent relative rotation between the split sleeve 40 and the powered drive shaft 14.
A plate-like member 46 generally paralleling the valve member 30 and a second plate-like member 48 generally transverse to the valve member 30 are secured to one of the members of the split sleeve 40. A connecting member 50 is connected to the members 46 and 48 by means of a pin 52 which loosely extends through the opening 54~ Similarly, the connecting member 50 loosely iota between the connecting member 51 to permit limited movement in a direction longitudinal to the path of flow through the valve. The valve member 30 is connected to the connecting member 50.
I
1 Thus, by means of the connection illustrated and de-scribed, the valve member 30 can move universally with respect to the valve spat 26 and due to the tapered or conical valve seating surface 36 and the coactin~ conical valve member enjoin surface 38, thermal growth and shrinkage of the valve seat 26 and the valve member 30 is accommodated due to the "float" of the valve member 30 so that an effective seal is accomplished under various thermal growth and shrinkage conditions Referring now to Figures 6 and 7, another embodiment of the invention is illustrated in which the reference letter "b" has been added to reference numerals of Figures 1-5 for convenience of reference.
In this embodiment, the valve seat assay the projection 27 which serves as a continuation of the inlet flow passage 18b and has a valve seat 36 which is disposed back of, above and around the entry of the flow into the enlarged portion 20, which is engaged by the valve member seating portion 38b.
As best seen in Figure 7, the valve seat 27 has a tapered or conical surface 29 on its outer portion and the valve member 30b has a correspondingly tapered or conical surface 31 which engages and seats on the tapered surface I when the valve is closed to prevent abrasive flow from flowing around the project end of the valve seat 27 and up onto the valve seating surface or portion 36b and the valve member seating portion or surface byway To assist in the sealing, a vented flexible metal tube 33 is .
secured to the valve seating area 36b and the valve engaging portion 33b of the valve member 30b has an annular groove 35 which engages and deflects the resilient tube 33 thus providing a fur-then seal against the metal resilient tube 33 to effect the closure. The metal tube 33 is vented to avoid pressure buildup and possible explosion of the tube if sealed caused by high tempt eraturesO The tube 33 can be vented in any desired manner, such as one or more openings in its wall, not shown.
Figure 8 illustrates a further modification of the volt shown in Egress 6 and 7 and in which the reference letter "c" has been added to numerals corresponding to those in Figures 6 and 7 for convenience of reference. This embodiment it identical -to that of Figures 6 and 7 except that the outer portion of the annular groove 33c is cut away to provide the tapered surface 33c which engages against the flexible tube 33c and provides an effect lively sealed closure shutting-off flow through the valve.
In both the embodiments of Figures 6 and 7 and of Figure 10 8, it it seen that the seating of the valve member against the seating surface of the valve is away from and out of the direct flow of the erosive and abrasive fluids through the valve. Accord-tingly, considerable erosion of the valve can occur and there still can be an effective closure of the valve shutting-off flow through it.
In the embodiments of Figures 6-8, inclusive, the no-mining parts and the means for closing and opening the valve are the same as those in Figures 1-5, inclusive.
The body 12 comprises an outer shell 16 which can be 20 constructed of low cost, low temperature material such as carbon steel and includes the insulation 60 which is a cartable insult Asian many of which are available on the open market, such as Fresco RS-7~
If desired, the insulation may be a refractory material, such as formed of hex mesh and refractory material, many of which are commercially available, such as Fresco ROY.
Also, as best illustrated in Figure 2, the orifice 25 is supported by a truncated cone 23 which is secured to the outer body shell 16. The truncated cone 23 is lined by a suitable 30 lining material 21, such as Taco 257, a commercial hard facing.
Similar linings are provided for the orifice plate 25 and, as illustrated, suitable refractory insulation and hard facing are 1 provided which will withstand the conditions of use, all of which are readily available on the market.
As previously mentioned, the valve seat 26, -thy valve 30, and connecting parts to the powered shaft 14, can be removed from the valve 10 without taking it off the line by simply remo~/incJ
the bonnet 62 by loosing the bolts, not shown, which is of a size sufficient to permit passage of these components of the valve through it. Thus, the valve can stay on line while repairs and replacements are made to the wear prone parts, thus avoiding sub-staunchly expense and shut-down time involved in removing a valve from the line.
Since the embodiments of the invention can be utilized with a wide variety of valves, and means to open and close them, no more description of a particular valve, such as illustrated in Figure l, is given or deemed necessary.
The present invention, therefore, is well suited and adapted to attain the objects and ens and has the advantages and features mentioned as well as others inherent therein While presently preferred embodiments of the invention have been given for the purpose of disclosure, changes can be made in them which are within the spirit of the invention as defined by the scope of the appended claims.
I
BACKGROUND OF THE INVENTION
There has been a serious erosion problem with valves used in high temperature erosive solid or fluid flow in that the valve seat or portions of the valve seat are eroded or abraded away ho the flow causing leaks and a failure of the valve to shut-off flow when desired. In addition, -there is a problem with valves used for high temperature erosive or abrasive flows to 10 provide adequate seating and hence sealing of the valve member on the valve seat due to thermal growth caused by the extremely high temperatures.
SUMMERY OF THE INVENTION
This application, being a division of Canadian Patent Application Serial No. 396,324 filed February 16, 1982 contains claims directed to only some aspects of the subject matter disclosed hereinbelow, The present invention is directed to a shut-off valve suitable for use for high temperature erosive flow such as in refineries in which considerable erosion of the flow passage adjacent the valve or a portion of the valve seat can and does take place without destroying the ability of the valve to effect-lively shutoff flow through the valve and to prevent leaks.
The present invention it also directed to such a valve which compensates for thermal growth of the valve so that an effective shut-off by the valve is provided under varying tempt erasure conditions. In addition, the present invention is dir-acted to such a valve for high temperature erosive flow and to accommodate thermal growth in which the valve seat and valve can by removed for repair or replacement without removing the valve from the line.
In short, the valve includes a body having a flow past sage through it, the flow passage including an enlarged internal chamber. The valve is arranged so that the seating surface of the valve seat and the seating surface of the valve member are beyond the initial erosion point and a substantial distance downstream - lo -1 thereof, a substantial erosion area of the valve, so that the shut-off valve effectively shuts-off flow through the valve even though there is substantial erosion of the flow passage or a portion of the valve seat itself.
The valve member is constructed and arranged so that its seating surface adjustable seats on the valve seating surface effective to compensate for thermal growth.
The valve is also constructed and arranged so that the valve seat, valve, and connecting and operable parts can be rev moved for repairs, replacements and the like without taking the valve off the line.
Accordingly, it is an object of the present invention to provide a shutoff valve for high temperature erosive flow in which substantial erosion o-f the flow passage adjacent the valve seat or of a portion of the valve seat itself does not prevent effective shutting-off of flow through the shut off valve.
A further object of the invention is the provision of such a valve in which the seating surface of the valve seat and valve member are beyond and out of the direct flow path of the erosive flow thrush the valve.
A further object of the present invention is the proviso of such a valve in which the seating surface of the valve member which seats on the valve seating surface automatically accommodates and adjusts for thermal growth due to the high temperature abrasive flow through the valve effective to provide a shut-off of flow under varying temperature conditions.
A further object of the present invention is the pro-vision of such a valve in which the valve seat, valve member, and connecting and operable parts are removable from the valve for replacement and repairs without removing the valve from the line.
Other and further objects, features and advantages will be apparent from the following description of presently preferred 1 embodiments of the invention given for the purpose of disclosure and taken in conjunction with top accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
, . .. . .... ..
Figure 1 is a plan view of the valve according to the present invention Figure 2 is a sectional view taken along the line 2-2 of Figure 1 and illustrating a presently preferred embodiment of the invention.
Figure 3 is an enlarged fragmentary view of the valve seating and valve member surfaces illustrating dosing and sealing with considerable erosion of the valve.
Figure 4 is a view similar to that of Figure 3 thus-treating a prior art valve arrangement and showing that the same amount or area of erosion as the valve in Figure 3 prevents shut off of flow through the valve.
Figure 5 is a sectional view taken along the section line 5-5 of Figure 2.
Figure 6 is a fragmentary view illustrating another embodiment of the valve illustrated in Figure 2.
Figure 7 is an enlarged fragmentary view illustrating the seating and sealing arrangement of the valve assembly of Figure 6.
Figure 8 is an enlarged view similar to Figure 7 thus-treating a modification of the valve of Figures 5 and 7.
DESCRIPTION OF PRESENTLY PREFERRED EMBODIMENTS
Referring now to the drawings, and particularly to Figure 1, a valve generally indicated by the reference numeral 10 is illustrated which is here shown as a powered shutoff valve in which the power cylinder arrangement 12 rotates a shaft 14 (not shown in this view but illustrated in Figures 2 and 5), for open-in and closing the valve.
1 Referring now to Figure 2, the valve lo includes the valve body 16 through which extends the flow passage 18 through the enlarged internal chamber 20 and out the downstream passage I
The flow passage 18 has what may be referred to for convenience as an entry 24 into -the enlarged internal chamber 20 of the valve body 16. A valve seat 26 is releasable secured to the entry 24 of the flow passage 18, such as by the bolts 28 against which a valve member 30 seats to shut off flow through the valve.
As best illustrated in Figure 3, there is what may be termed an initial erosion point 32 adjacent and upstream of the entry 24 where erosion caused by the erosive flow through the valve commences to occur. Normally, this erosion extends down-stream into the valve seat 26 and provides an area of erosion which begins at the initial erosion point 32 and erodes downstream and, as here shown, ends at the downstream erosion point 34. In the embodiment illustrated in Figures 2 and 3, the valve seat 26 has an outwardly tapering or conical valve seating surface 36 extending in the direction of flow and which is beyond in the direction of flow of the erosion area between the initial erosion point 32 and the downstream erosion point 34. The valve member 30 has a coating tapered or conical valve seating surface 38 which seats on the valve seating surface 35 beyond the erosion area as clearly illustrated yin Figure 3. Thus, although there is a sub-staunchly area of erosion of the flow passage and a portion of the valve seat 26, the valve member 30 effectively seats and seals on the valve 26 to effectively shut-off flow through the valve.
Referring now to Figure 4 in which the reference letter "a" is added to corresponding reference numerals of Figure 3 for convenience of reference, a prior art valve is illustrated in which the valve seating surface aye of the valve aye and the valve l l By 1 seating surface aye of the valve member aye are disposed Jo that the same area of erosion of -the valve illustrated in Figure 3 causes the valve seating surface aye to be exuded of the prior art valve so that the closing of the valve melnber aye does not effect-lively shut off flow through the valve and, accordingly the valve seat aye must be removed and replaced much sooner and hence much more often than a valve according to the present invention as illustrated in Figures 2 and 3, which greatly increases the ox-pens of maintenance, operation and shut down time of the valve.
Referring again to Figure 2, the drive shaft 14 for rotating the valve 30 into closed and open position is disposed in the enlarged internal chamber 20 and is offset from and out of the direct flow through the enlarged flow passage 20 and the discharge passage 22. In this connection, for convenience of reference, what is referred to as "direct" flow though the valve is a con-Tunisian of the tubular flow passage 18 through the enlarged internal chamber 20 and out the discharge 22.
As illustrated in Figures 2 and 5, a split sleeve 40 is disposed about the powered drive shaft 14 and is secured about it by means of the bolts 42 although the split sleeve 40 may be so secured in any desired manner As best shown in Figure 2, the keys or splints 44 are provided to prevent relative rotation between the split sleeve 40 and the powered drive shaft 14.
A plate-like member 46 generally paralleling the valve member 30 and a second plate-like member 48 generally transverse to the valve member 30 are secured to one of the members of the split sleeve 40. A connecting member 50 is connected to the members 46 and 48 by means of a pin 52 which loosely extends through the opening 54~ Similarly, the connecting member 50 loosely iota between the connecting member 51 to permit limited movement in a direction longitudinal to the path of flow through the valve. The valve member 30 is connected to the connecting member 50.
I
1 Thus, by means of the connection illustrated and de-scribed, the valve member 30 can move universally with respect to the valve spat 26 and due to the tapered or conical valve seating surface 36 and the coactin~ conical valve member enjoin surface 38, thermal growth and shrinkage of the valve seat 26 and the valve member 30 is accommodated due to the "float" of the valve member 30 so that an effective seal is accomplished under various thermal growth and shrinkage conditions Referring now to Figures 6 and 7, another embodiment of the invention is illustrated in which the reference letter "b" has been added to reference numerals of Figures 1-5 for convenience of reference.
In this embodiment, the valve seat assay the projection 27 which serves as a continuation of the inlet flow passage 18b and has a valve seat 36 which is disposed back of, above and around the entry of the flow into the enlarged portion 20, which is engaged by the valve member seating portion 38b.
As best seen in Figure 7, the valve seat 27 has a tapered or conical surface 29 on its outer portion and the valve member 30b has a correspondingly tapered or conical surface 31 which engages and seats on the tapered surface I when the valve is closed to prevent abrasive flow from flowing around the project end of the valve seat 27 and up onto the valve seating surface or portion 36b and the valve member seating portion or surface byway To assist in the sealing, a vented flexible metal tube 33 is .
secured to the valve seating area 36b and the valve engaging portion 33b of the valve member 30b has an annular groove 35 which engages and deflects the resilient tube 33 thus providing a fur-then seal against the metal resilient tube 33 to effect the closure. The metal tube 33 is vented to avoid pressure buildup and possible explosion of the tube if sealed caused by high tempt eraturesO The tube 33 can be vented in any desired manner, such as one or more openings in its wall, not shown.
Figure 8 illustrates a further modification of the volt shown in Egress 6 and 7 and in which the reference letter "c" has been added to numerals corresponding to those in Figures 6 and 7 for convenience of reference. This embodiment it identical -to that of Figures 6 and 7 except that the outer portion of the annular groove 33c is cut away to provide the tapered surface 33c which engages against the flexible tube 33c and provides an effect lively sealed closure shutting-off flow through the valve.
In both the embodiments of Figures 6 and 7 and of Figure 10 8, it it seen that the seating of the valve member against the seating surface of the valve is away from and out of the direct flow of the erosive and abrasive fluids through the valve. Accord-tingly, considerable erosion of the valve can occur and there still can be an effective closure of the valve shutting-off flow through it.
In the embodiments of Figures 6-8, inclusive, the no-mining parts and the means for closing and opening the valve are the same as those in Figures 1-5, inclusive.
The body 12 comprises an outer shell 16 which can be 20 constructed of low cost, low temperature material such as carbon steel and includes the insulation 60 which is a cartable insult Asian many of which are available on the open market, such as Fresco RS-7~
If desired, the insulation may be a refractory material, such as formed of hex mesh and refractory material, many of which are commercially available, such as Fresco ROY.
Also, as best illustrated in Figure 2, the orifice 25 is supported by a truncated cone 23 which is secured to the outer body shell 16. The truncated cone 23 is lined by a suitable 30 lining material 21, such as Taco 257, a commercial hard facing.
Similar linings are provided for the orifice plate 25 and, as illustrated, suitable refractory insulation and hard facing are 1 provided which will withstand the conditions of use, all of which are readily available on the market.
As previously mentioned, the valve seat 26, -thy valve 30, and connecting parts to the powered shaft 14, can be removed from the valve 10 without taking it off the line by simply remo~/incJ
the bonnet 62 by loosing the bolts, not shown, which is of a size sufficient to permit passage of these components of the valve through it. Thus, the valve can stay on line while repairs and replacements are made to the wear prone parts, thus avoiding sub-staunchly expense and shut-down time involved in removing a valve from the line.
Since the embodiments of the invention can be utilized with a wide variety of valves, and means to open and close them, no more description of a particular valve, such as illustrated in Figure l, is given or deemed necessary.
The present invention, therefore, is well suited and adapted to attain the objects and ens and has the advantages and features mentioned as well as others inherent therein While presently preferred embodiments of the invention have been given for the purpose of disclosure, changes can be made in them which are within the spirit of the invention as defined by the scope of the appended claims.
I
Claims (5)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A shut-off valve for high temperature erosive flow comprising, a body provided with a flow passage through it including an enlarged internal chamber, the downstream end of the flow passage projecting into the enlarged internal chamber, a valve seat having a valve seating portion disposed in the enlarged internal chamber about and upstream of the downstream end of the flow passage in the enlarged internal chamber, said valve seating portion projecting from the downstream end of the flow passage and having a tapered outer wall and a surface extending outwardly from said tapered outer wall, a resilient seal secured to said surface extending outwardly from said tapered outer wall, a valve member having a seating surface arranged to seat on the valve seating portion, the valve member valve seating surface having a tapered portion engaging the tapered outer wall and another portion extending outwardly engaging said resilient seal when seating against the valve seating portion, means disposed in the enlarged internal chamber operable to rotate the valve member to seat the valve seating surface thereof against the valve seating portion to close the valve and to rotate the valve member out of the direct flow through the flow passage to open the valve, said last-named means including a rotatably mounted shaft disposed in the enlarged internal chamber out of the erosive flow path, and means connecting the valve to the shaft effective so that rotation of the shaft rotates the valve member to open and close the valve as aforesaid, whereby, there is an effective shut-off by the valve when closed and the valve seating portion and the valve seating surface are out of the erosive flow path through the valve when the valve is open.
2. The shut-off valve of claim 1 where, said resilient seal is a vented tube and where, the valve seating surface of the valve member has an annular groove adapted to sealingly engage the tube.
3. The shut-off valve of claim 2, where, the valve seating surface of the valve member has another tapered portion adapted to sealingly engage the vented tube.
4. The shut-off valve of claim 1 where, said resilient seal is a vented tube disposed on said outwardly extending surface of said valve seating portion of said valve seat.
5. The shut-off valve of claims 1 or 4 where, the means operable to rotate the valve member include universal means providing rotational movement and longitudinal movement in the direction of said flow passage and connecting the valve member to the rotatably mounted shaft effective to accommodate thermal growth and shrinkage of the valve to sealingly seat the seating surface of the valve member against the valve seat.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/209,090 US4331316A (en) | 1980-11-21 | 1980-11-21 | Shut-off valve for high temperature erosive flow |
| CA000396324A CA1186671A (en) | 1980-11-21 | 1982-02-16 | Shut-off valve for high temperature erosive flow |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000396324A Division CA1186671A (en) | 1980-11-21 | 1982-02-16 | Shut-off valve for high temperature erosive flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1198403A true CA1198403A (en) | 1985-12-24 |
Family
ID=25669577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000458927A Expired CA1198403A (en) | 1980-11-21 | 1984-07-13 | Shut-off valve for high temperature erosive flow |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1198403A (en) |
-
1984
- 1984-07-13 CA CA000458927A patent/CA1198403A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |