SE538143C2

SE538143C2 - A device for changing a flow direction through a heat exchanger and use thereof

Info

Publication number: SE538143C2
Application number: SE1451047A
Authority: SE
Inventors: Ralf Blomgren
Original assignee: Marinnovation Hb
Priority date: 2014-09-10
Filing date: 2014-09-10
Publication date: 2016-03-15
Also published as: WO2016039680A1; EP3191748A1; US9958221B2; EP3191748B1; SE1451047A1; US20170254605A1

Description

25 30 538 143 housing, wherein the conduits are rotatable between different ports in the valve housing to change the flow direction.

A problem with devices for changing flow direction through heat ex- changers according to the prior art is that they are relatively large and require a lot of space. Hence, they can be difficult to install in existing plants.

Another problem with such prior art devices is that they are heavy and sometime cannot be installed in existing plants due to the extra weight ap- plied on foundations or similar.

Another problem with such prior art devices is that they are expensive.

SUMMARY OF THE INVENTION An object of the present invention is to avoid problems of the prior art and provide a small, light and cost efficient device for changing the flow di- rection of one medium through a heat exchanger, which more easily can be installed in existing plants.

The present invention relates to a device for changing a flow direction through a heat exchanger, comprising a valve housing and a rotatable valve member arranged inside the valve housing, said valve housing comprising a first end, a second end and a centre axis extending between said first and second ends, wherein the device comprises a first port, a second port, a third port and a fourth port, said first end being provided with the first port, and said second end being provided with the third port and the fourth port, where- in the valve member is rotatable between a first position and a second posi- tion and, in the first position, defines a conduit between the first port and the third port and, in the second position, defines a conduit between the first port and the fourth port, characterised in that the veive rnernber is rotetabie around an axis of rotation offset front the centre axis, said axis of rotation extending through the centre of the first port, and the first port is angularly displaced 90° around the centre axis in rešation to the third and fourth ports. "the second port ean be arranged En the first end of the vaive housing. After- riatttfeiy, the second port can be arranged et another iocatiott, such as per- 10 15 20 25 30 538 143 pendiouier to the first port end, tor exarnpie, in a tower part of the vaive hous- ing. The tirst port or the tirst end seoono ports in the first end of the veive housing being dispieoed around the centre axis in combination with the exis of rotation being ottset frorn the oentre axis resuits in that speoe is mode tor an exterior actuator on the second end ot the vaive housing white using the surface of the vaive housing enes for the ports etficientiy. tienoe, there is no neeci to rneke room tor the ectuetor between the ports on the exterior suriece of the vaive housing. instead the actuator can he arranged next to the ports, such as above, beiow or besides the ports, wherein e rneximurn area of eeeh of the ende ot the veive housing cen be used tor the ports end conneeting tienges tor connection to pipes to and trorn the device. Hence, eoooiroiirig to the invention the eree of the ends ot the vaive housing tor the ports ere used ettioientiy. Henee, the inventioit resuits in that the device oan be reduced in size and weight compared to prior ert detfices, which seves tneteriei end eost and taciiitete insteiiation in existing pients as ttreii as in new piants.

Further, the tirst port or tirst anti second ports being enguiariy dis- piaced 90” erotind the centre axis in reiation to the titird and tourth ports is heiieved to resuit en even symrnetry and presumebiy tevorabie fiow proper- ties through the dei/tee end e structure which is easy to rnenutecttire end tfvhicit operetes reiiehiy and etticientiy. The device can comprise the actuator for rotating the valve member around the axis of rotation. The actuator can be connected to the valve member through the shaft, said shaft extending through the second end of the valve housing, wherein the shaft is arranged coaxiai with the axis of rotation. For example, the actuator is arranged entire- ly outside the valve housing and is not in contact with any medium of the heat exchanger, i.e. any fluid or liquid. The actuator can be mechanically and non- electronically connected to the valve member.

The valve member can comprise a first plate and a second plate form- ing a dividing wall for dividing the interior of the valve housing into two com- partments to reduce pressure drop of the medium flowing through the device.

There are two flow paths through the valve housing, i.e. one through the conduit of the valve member and the other outside the valve member inside the valve housing. There can be a considerable pressure drop for the flow 10 15 20 25 30 538 143 through the valve housing outside the valve member. By dividing the interior of the valve housing by means of the first and second plates attached to the valve member the cross section of the flow path through the valve housing can be reduced, wherein the pressure drop is reduced.

The centres of the first and second ports can be arranged on a first imaginary line perpendicular to and crossing the centre axis of the valve housing, and the centres of the third and fourth ports can be arranged on a second imaginary line perpendicular to and crossing the centre axis of the valve housing. ln this way the surface of the ends of the valve housing can be used efficiently. The first imaginary line can be perpendicular to the sec- ond imaginary line. For example, the first imaginary line can be a vertical line and the second imaginary line can be a horizontal line when the centre axis extends horizontally. Hence, the first port can be an inlet port and the second port can be an outlet port and the first port can be arranged above the sec- ond port. Undesired material in the medium flowing through the valve hous- ing outside the conduit of the valve member tend to sink to the bottom of the valve housing, wherein it can be cleansed by the flow and follow the medium out from the valve housing through the lower outlet formed by the second port. The third and fourth ports can be arranged side by side and can be dis- placed in the lateral direction in relation to each other.

An exterior side of the valve housing ends can be provided with threaded holes, for example, being evenly distributed around the ports and, optionally, having a hole circle being concentric with the ports, respectively.

The threaded holes are arranged for receiving bolts or screws to fasten pipes directly to the device without the use of any intermediate connection pipes.

Further, connecting flanges can be arranged directly on the valve housing ends. For example, connecting flanges can be fastened to the valve housing ends by screws.

The connections on large pipes are usually arranged as connecting flanges, and prior art devices for reversing ?ow direction through heat ex- changers are generally provided with connection pipes having connecting flanges, which are expensive. The ends of the valve housing can be ar- 10 15 20 25 30 538 143 ranged in carbon steel to keep the cost down, while the projecting connection pipes according to prior art must be corrosive resistant as they are in contact with the fluid flowing through the device. Sometimes it is not suitable to weld such prior art connection pipes to the ends of the valve housing, e.g. as it can be different materials, wherein the connection pipes must be fastened by means of bolted joints. A typical prior art joint can comprise a flange of the same size and material as the as the pipe, said flange being welded to the pipe, the joint further comprising a flange of carbon steel outside the welded flange and a plurality of bolts being fastened to holes in the end of the valve housing. The connection pipe extends through the port in the end of the valve housing and is welded to a plate on the interior of the end of the valve hous- ing. Hence, according to prior art the connection pipe is permanently fixed to the valve housing and cannot be removed by removing the bolts.

According to the present invention, however, two standard type con- necting flanges of pipes can be placed next to each other directly on the ends of the valve housing and then fastened to the ends by means of bolts screwed into the holes around the ports, wherein a less expensive and less complicated structure with fewer parts is provided compared to prior art de- vices of this type.

The present invention also relates to a use of the device as described above for reversing a flow direction of one medium through a heat exchang- er. The flow direction can be reversed to remove undesired material, such as particles, fibres or debris, from the heat exchanger. The flow direction can be reversed periodically, on demand or automatically when required, such as by use of appropriate sensors.

Further characteristics and advantages of the present invention will become apparent from the description of the embodiments below, the ap- pended drawings and the dependent claims.

SHORT DESCRIPTION OF THE DRAWINGS The invention will now be described more in detail with the aid of em- bodiments and with reference to the appended drawings, in which 10 15 20 25 30 538 143 Fig. 1 is a schematic view of a heat exchanger, a device for changing flow direction through the heat exchanger and pipes connecting the device with the heat exchanger and pipes connecting the device with main pipes accord- ing to one embodiment of the present invention, Fig. 2 is a schematic view of the device in Fig. 1, Fig. 3 is a schematic view of the device in the direction of the arrow A in Fig. 2, Fig. 4 is a schematic section view along line B in Fig. 3, iiiustrating a valve housing and a rotatable valve member of the device, Fig. 5 is a schematic view of a second end of the valve housing of Fig. 2, Fig. 6 is a schematic view of a first end of the valve housing of Fig. 2, Figs. 7 and 8 are schematic views of the valve member according to one embodiment, Fig. 9 is a schematic view of a prior art device according to SE520124, and Fig. 10 is a schematic view according to Fig. 2 for comparison with the prior art device of Fig. 9.

DETAILED DESCRIPTION OF EMBODIMENTS Referring to Fig. 1 a device 1 for changing a flow direction ofa medium through a heat exchanger 2, such as a plate heat exchanger, is disclosed according to one embodiment example. ln Fig. 1 the device 1 is connected to a first pipe 3 for conducting a medium, such as a first medium, to or from the device 1. ln the illustrated embodiment the first pipe 3 is connected to a first main pipe 4 for transporting the first medium to or from the first pipe 3. For 10 15 20 25 30 538 143 example, the first pipe 3 is arranged for conducting the first medium to the device 1. The device 1 is further connected to a second pipe 5 for conducting the first medium to or from the device 1. ln the illustrated embodiment the second pipe is connected to a second main pipe 6 for transporting the first medium to or from the second pipe 5. For example, the second pipe 5 is ar- ranged for conducting the first medium away from the device 1. The device 1 is further connected to a third pipe 3(5) and a fourth pipe 5(3) connecting the device with the heat exchanger 2. The device 1 is connected to one circuit of the heat exchanger 2 for one medium, wherein pipes of the second circuit for conducting a second medium to and from the heat exchanger 2 are not illus- trated in the drawings.

According to the illustrated embodiment example, the first medium is conducted from the first main pipe 4 to the device 1 through the first pipe 3, wherein the first medium is conducted through the device 1 and into the heat exchanger 2 through the third pipe 3(5). For example, the first medium is conducted into a bottom part of the heat exchanger 2. After passing through the heat exchanger 2, the first medium is conducted out from the heat ex- changer 2 and to the device 1 through the fourth pipe 5(3), and then to the second main pipe 6 through the second pipe 5. For example, the first medi- um is conducted out from the heat exchanger through a top part thereof. An example of normal flow operation is illustrated by means of the solid arrows in Fig. 1. When the flow direction of the first medium through the heat ex- changer is reversed by means of the device 1, the first medium is conducted from the main pipe 4, through the first pipe 3 to the device 1 and then through the fourth pipe 5(3) into the heat exchanger 2, wherein the first medium is conducted out from the heat exchanger 2 to the device 1 through the third pipe 3(5) and further to the second main pipe 6 through the second pipe 5.

An example of reversed flow operation from the heat exchanger 2 to the de- vice 1 is illustrated by means of broken arrows in Fig. 1. For example, during reversed flow, the first medium is conducted into the heat exchanger 2 through the top part thereof, wherein the first medium is conducted out from the heat exchanger 2 through the bottom part thereof. Hence, by means of the device 1 the flow direction of the first medium through the heat exchanger 10 15 20 25 30 538 143 2 is reversed and then changed back to the original flow direction. For exam- ple, the flow direction is changed periodically or when required.

With reference to Fig. 2 the device 1 comprises a valve housing 7 hav- ing a second end 8 and a first end 9. For example, the valve housing 7 is formed as a cylinder, e.g. having circular cross section. The first end 9 is ar- ranged opposite the second end 8. For example, the first and second ends 9, 8 are substantially circular. ln the illustrated embodiment the device compris- es lining rings 10-13 for engagement with the pipes 3(5), 5(3), 3, 5 or con- necting flanges thereof. Lining ring 11 is illustrated within parenthesis as it is hidden behind lining ring 10 in Fig. 2. The first and second ends 9, 8 are, for example, connected to each other by a plurality of conventional bolt connec- tions 14, so that a central casing of the valve housing 7 is connected to the first and second ends 9, 8 in a pressure tight connection. For example, the valve housing 7 are made of metal, such as a non-magnetic metal or alloy, such as a nickel steel alloy or titanium. Alternatively, the first and second ends 9, 8 are made of carbon steel.

An actuator 15 for controlling the flow direction is arranged on the valve housing 7. For example, the actuator 15 is arranged on the exterior of the valve housing 7, such as on the exterior of the first or second end 9, 8 thereof. For example, the actuator 15 is arranged on the second end 8 of the valve housing 7, such as at an upper part thereof. The actuator 15 comprises motorized and/or manual devices for operating the device 1, which are ar- ranged outside the valve housing 7. For example, the actuator 15 is made of aluminium or carbon steel.

With reference to Fig. 3 the device 1 is illustrated in the direction of the arrow A in Fig. 2, such as from above, wherein the lining ring 11 is visible.

The valve housing 7 has a centre axis represented by the line B in Fig. 3.

The centre axis B extends between the first and second ends 9, 8 of the valve housing 7. The centre axis B extends through the centre of the valve housing 7. For example, the centre axis B extends from a centre point of the first end 9 to a centre point of the second end 8. 10 15 20 25 30 538 143 With reference to Fig. 4 a valve member 16 is arranged within the valve housing 7 between the first and second ends 9, 8 thereof. The valve member 16 forms a conduit for the first medium through the valve housing 7.

The valve member 16 is rotatable and can be rotated around an axis of rota- tion 17. The valve member 16 can be rotated between a first and a second position. For example, the valve member 16 can be rotated 90” eround the axis of rotation 17. The rotation of the vaive inemoer 113 is provided by the ectuetor 15, the actuetor 15 being connected to the shett 18 extending through the second end 8 oi the veive housing 7 and is connected to e huh 19 ot the veive iriember 16. The veive itternber 16 is guided hy e combined hearing and seeiirwg in ring 21). For exernoie the ring 26 is connected to the vaive rnernber 16 through a piete. An o-ring 21 tonns e seeiing around the sheft 16 which is inounted in e hearing 22. in Figs. r1~6 the tfeive rnernher 16 is in e rtiiddle position, ie. between the tirst and second positions, such es 45” front the first and second positions.

With reference to Fig. 5 the second end 8 of the valve housing 7 ac- cording to the embodiment of Fig. 2 is illustrated. By means of the arrows in Fig. 5 the rotation of the valve member 16 is illustrated between the first and second positions E, F along the curved line G. The first and second positions E, F are, for example, end positions and coincide with the centre of the third and fourth pipes 3(5), 5(3), respectively, when said pipes 3(5), 5(3) are con- nected to the device 1. During operation the valve member 16 is in one of the first and second positions, wherein the position of the valve member 16 is changed for reversing the flow direction through the heat exchanger 2. ln the illustrated embodiment the valve member 16 is in position E during normal operation and in position F during reversed flow operation. The point H indi- cate the centre of an outlet orifice of the valve member 16.

With reference to Fig. 6 the first end 9 of the valve housing 7 according to the embodiment of Fig. 2 is illustrated.

Figs. 7 and 8 illustrate the valve member 16 according to one embod- iment. The valve member 16 comprises a curved conduit 23, such as a pipe, extending between the first and second ends 9, 8 of the valve housing 7. 10 15 20 25 30 538 143 Hence, the conduit 23 has a first end at the first end 9 of the valve housing 7 and a second end at the second end 8 of the valve housing 7. Alternatively, the valve member 16 comprises a straight and inclined conduit, such as a straight pipe having bevelled end portions forming an oblique cylinder shape.

The first end portion of the conduit 23 is provided with a combined bearing and sealing 24, wherein the second end portion of the conduit 23 is provided with a sealing 25. For example, the material of the combined bearing and sealing 24 and the sealing 25 has low friction against the interior surface of the ends 9, 8 of the valve housing 7, so that the torque for rotating the valve member 16 can be low.

According to the illustrated embodiment the valve member 16 com- prises a first plate 26 and a second plate 27 dividing the interior of the valve housing 7 to reduce the cross section of the flow through the valve housing 7 so as to reduce the pressure drop in the device 1. For example, the first plate 26 and the second plate 27 are arranged in a common plane and extend from opposite sides of the conduit 23, such as a top side and a bottom side, respectively. For example, the first and second plates 26, 27 are fixed to the conduit 23 and rotate along with the conduit 23 when the valve member 16 is rotated. The first and second plates 26, 27 extend along the flow direction through the valve housing 7 outside the conduit 23 of the valve member 16.

For example, the first and second plates 26, 27 are arranged in a plane along which the axis of rotation 17 extends. For example, the axis of rotation 17 is horizontal. ln the illustrated embodiment a connecting plate 28 connects the hub 19 with the second end of the conduit 23. The connecting plate 28 is fixed to the conduit 23 and the shaft 18 to the hub 19, wherein the valve member 7 is rotated when the shaft 18 is rotated by means of the actuator 15. The con- necting plate 28 extends, for example, perpendicular or at an angle to the shaft 18. For example, the second end of the conduit 23 is arranged below the hub 19. For example, the connecting plate 28 also supports the sealing 25. 10 10 15 20 25 30 538 143 Referring back to Figs. 4-6 the valve housing 7 is provided with a first port 29, a second port 30, a third port 31 and a fourth port 32. The ports 29- 32 are arranged for connection to the pipes 3, 5, 3(5), 5(3), respectively, so that the medium is conducted to and from the device 1 through the ports 29- 32. For example, the first pipe 3 is arranged for connection to the first port 29, the second pipe 5 is arranged for connection to the second port 30, the third pipe 3(5) is arranged for connection to the third port 31 and the fourth pipe 5(3) is arranged for connection to the fourth port (32). The Iining rings 10-13 are arranged around the ports 31, 32, 29, 30, respectively, for engagement with corresponding connection flanges of the pipes 3(5), 5(3), 3, 5. ln the il- lustrated embodiment, the Iining rings 10-13 are fastened to port Iinings ex- tending into the ports 31, 32, 29, 30, for example by welding. For example, the Iining rings 10-13 project less than 30 mm, less than 20 mm or less than 10 mm in the axial direction from the exterior surface of the first and second ends 9, 8.

The first and the second ports 29, 30 are arranged in the first end 9 of the valve housing 7, wherein the third and fourth ports 31, 32 are arranged in the second end 8 thereof. Alternatively, the second port 30 is arranged at any other suitable location on the valve housing 7, such as in the lower part thereof. For example, the second port 30 is arranged perpendicular to the first port 29. The centre of the first port 29 is arranged at a distance from the centre axis B of the valve housing 7 and the centre of the second port 30 is arranged at a distance from the centre axis B on the opposite side thereof, so that the first and second ports 29, 30 are displaced in relation to the centre axis B. For example, the distance between the centre of the first port 29 and the centre axis B is equal to the distance between the centre of the second port 30 and the centre axis B. For example, the first port 29 is an inlet port, wherein the second port 30 is an outlet port. For example, the first port 29 is arranged above the second port 30. For example, the centre of the first port 29 and the second port 30 are arranged on a first imaginary line, such as a vertical line, being perpendicular to the centre axis B. For example, the first imaginary line intersects both the centre axis B and the axis of rotation 17.

The centre of the third port 31 is arranged at a distance from the centre axis 11 10 15 20 25 30 538 143 B of the valve housing 7 and the centre of the fourth port 32 is arranged at a distance from the centre axis B on the opposite side thereof, so that the third and fourth ports 31, 32 are displaced in relation to the centre axis B. For ex- ample, the distance between the centre of the third port 31 and the centre axis B is equal to the distance between the fourth port 32 and the centre axis B. For example, the centre of third port 31 and the fourth port 32 are ar- ranged on a second imaginary line being perpendicular to the centre axis B and the first imaginary line on which the first and second ports 29, 30 are ar- ranged. The first and second ports 29, 30 are angularly displaced 90” around the centre axis B in relation to the third and fourth ports 31, 32. For exantpte, the second irnaginary iine on ttihioh the centre ot the third and fourth ports 31, 32 are arranged is a horizontai itne.

The axis ot rotation t? ooinoides with the centre of the first port 29 and, eg., extende in paraiiei to the centre axis B. Hence, the remaining ports 3G- 32 are otteet to the axis ot rotation tï. The centre ot' the third port 31 and the totirth port 32 are arranged vtfith the earne distance to the axis of rotation W.

Hence, the third and fourth ports 31, 32 are arranged on an imaginary oiroie around the axis ot rotation W, which irnagiitary oircie is arranged perpendicu- iar to the axis oi rotation ti, to interact with the second end ot the conduit 23 tfvhert the vaive nternber 16 is rotated between the tirst and second positions.

The curve G oi Fig. 5 reoreeente a part of said imaginary cireie.

The first end of the conduit 23 of the valve member 16 is connected to the first port 29 and the second end of the conduit 23 is displaceable be- tween the third port 31 and the fourth port 32. Hence the valve member 16 is rotatable between its first position, in which the first medium is conducted from the first port 29 to the third port 31, and its second position, in which the first medium is conducted from the first port 29 to the fourth port 32, for ex- ample, for reversed flow through the heat exchanger 2.

Referring back to Fig. 5 the arrows illustrate the rotation of the valve member 16 between the first and second positions E, F along the curved line G, wherein the first and second positions E, F coincide with the third and fourth ports 31, 32, respectively. During operation the valve member 16 is in 12 10 15 20 538 143 one of the first and second positions E, F to allow the medium to pass from the first port 29 to the third port 31 or the fourth port 32. The position of the valve member 16 is changed, for example from the third port 31 to the fourth port 32 or vice versa, for reversing the flow direction through the heat ex- changer2. lt is to be understood that the conduit 23 of the valve member 16 is constantly connected to one port of one of the ends 9, 8 of the valve housing 7. ln the illustrated embodiment that is the first port 29. However, the conduit 23 of the valve member 16 can be constantly connected to any of the ports 29-32, provided that said port is arranged in one of the ends 9, 8, and then rotated between the two ports of the opposite end of the valve housing 7.

With reference particularly to Figs. 5 and 6 the first and second ends 9, 8 of the valve housing 7 comprise threaded holes 33. The holes 33 are ar- ranged on an exterior side of the first and second ends 9, 8 to receive bolts for connecting the pipes 3, 5, 3(5), 5(3) to the device 1. Hence, the holes 33 are arranged for forming a boltjoint with a connecting flange of the pipes 3, 5, 3(5), 5(3) to be connected with the device 1. For example, the holes 33 are distributed around the ports, 29-32, respectively, such as around the lining ring 12, 13, 10, 11 around each of the ports 29-32.

Fig. 9 and 10 is a comparison between the device 1 according to the invention, which is illustrated in Fig. 10, with a prior art device according to SE520124. 13

Claims

1. 538 143 PATENTKRAV 1. Anordning (1) fOr andring av flOdesriktning genom en varmevaxlare (2), innefattande ett ventilhus (7) och en inuti ventilhuset (7) roterbart anordnad ventilkropp (16), varvid ventilhuset (7) innefattar en forsta ande (9), en andra ande (8) och en mellan den fOrsta och andra anden (9, 8) sig strackande centrumaxel (B), varvid anordningen (1) innefattar en forsta port (29), en andra port (30), en tredje port (31) och en fjarde port (32), varvid den fOrsta anden (9) är forsedd med den forsta porten (29), och den andra anden (8) är forsedd med den tredje porten (31) och den fjarde porten (32), varvid ventil- kroppen (16) är roterbar mellan en fOrsta position och en andra position och, i den forsta positionen, bildar en ledning (23) mellan den fOrsta porten (29) och den tredje porten (31) och, i den andra positionen, bildar en ledning (23) melIan den fOrsta porten (29) och den fjarde porten (32), kannetecknad av att ventilkroppen (16) är roterbar kring en i forhallande till centrumaxeln (B) forskjuten rotationsaxel (17), varvid rotationsaxeln (17) stracker sig genom den forsta portens (29) centrum, och den fOrsta porten (29) är forskjuten 90° kring centrumaxeln (B) i forhallande till den tredje och fiarde porten (31, 32).

2. Anordning enligt krav 1, varvid rotationsaxeln (17) är parallell med centrumaxeln (B).

3. Anordning enligt krav 1 eller 2, varvid den andra porten (30) är anordnad i ventilhusets (7) forsta ande (9).

4. Anordning enligt krav 3, varvid den fOrsta och andra porten (29, 30) är forskjuten 90° kring centrumaxeln (B) i forhallande till den tredje och fjarde porten (31, 32).

5. Anordning enligt nagot av foregaende krav, innefattande ett manoverdon (15) for att vrida ventilkroppen (16) kring rotationsaxeln (17), varvid mano- 538 143 verdonet (15) ar forbundet med ventilkroppen (16) genom en axel (18) som stacker sig genom ventilhusets (7) andra ande (8), varvid axeln (18) ar anordnad koaxialt med rotationsaxeln (17).

6. Anordning enligt krav 5, varvid ventilkroppens (16) ledning (23) innefattar en forsta ande som fortlopande ar forbunden med den fOrsta porten (29) och en andra ande som at- forskjutbar mellan den tredje och garde porten (31, 32), och varvid ventilkroppen (16) är fOrbunden med axeln (18) genom en farbindningsplatta (28) vid ledningens andra ande.

7. Anordning enligt nagot av foregaende krav, varvid ventilkroppen (16) innefattar en forsta platta (26) och en andra platta (27) som bildar en avdelande vagg for att dela ventilhusets (7) inre i tva fack.

8. Anordning enligt krav 7, varvid den farsta plattan (26) och den andra plat- tan (27) ar anordnade i ett gemensamt plan som stacker sig genom rotationsaxeln (17).

9. Anordning enligt nagot av foregaende krav, varvid den forsta och andra portens (29, 30) centrum ar anordnade pa en forsta tankt linje vinkelratt mot och korsande ventilhusets (7) centrumaxel (B), och varvid den tredje och garde portens (31, 32) centrum ar anordnade pa en andra tankt linje vinkelraft mot och korsande ventilhusets (7) centrumlinje (B).

10. Anordning enligt krav 9, varvid den fOrsta tankta linjen ar vinkelrat mot den andra tankta linjen.

11. Anordning enligt nagot av foregaende krav, varvid den forsta porten (29) är en inloppsport och den andra porten (30) är en utloppsport.

12. Anordning enligt nagot av foregaende krav, varvid den forsta porten (29) ar anordnad ovanfor den andra porten (30). 538 143

13. Anordning enligt nagot av foreg5ende krav, varvid en yttre sida hos yentilhusets andar (9, 8) är forsedda med gangade hl (33) far att bilda bultforband med en kopplingsflans hos ett reit* som ska kopplas till anordningen.

14. Anvandning av en anordning enligt n5got av foregaende krav kir att vanda en flodesriktning hos ett medium genom en varmevaxlare (2).

15. Anvandning enligt krav 14 for att avlagsna oonskat material fr5n varmevaxlaren (2). 6!d Z 6!d el. a _ zi. L (14,) oi. _} 3 -.0111- 91. cl .1- , co cl Lo 9 L171, id I. oL 538 143 4/8 1