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1. (WO2019007587) OBTAINING PRODUCT SAMPLE FROM A VACUUM VESSEL
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CLAIMS

1 . A method (200) for obtaining a product sample from a vacuum vessel (102) by using a system (100) comprising a first valve arrangement (104), a second valve arrangement (106) and a sample receiver (108) connected to the first valve arrangement (104) and the second valve arrangement (106), the method (200) comprising

opening (202) the first valve arrangement (104) to provide fluid communication between an upper volume (1 10) of the vacuum vessel (102) and the sample receiver (108), such that pressure levels inside the vacuum vessel (102) and the sample receiver (108) are equalized,

opening (204) the second valve arrangement (106) to provide fluid

communication between a lower volume (1 12) of the vacuum vessel (102) and the sample receiver (108), such that product flows from the vacuum vessel (102) into the sample receiver (108),

closing (206) the first valve arrangement (104) and the second valve

arrangement (106), to prevent fluid communication between the upper and lower volumes (1 10, 1 12) and the sample receiver (108),

opening (208) the first valve arrangement (104) to provide fluid communication between surrounding atmosphere and the sample receiver (108), such that pressure levels inside the sample receiver (108) and the surrounding atmosphere are equalized, and

opening (210) the second valve arrangement (106), to provide fluid

communication between the surrounding atmosphere and the sample receiver (108), such that the product flows out from the sample receiver (108).

2. The method according to claim 1 , wherein the closing (206) the first valve arrangement (104) and the second valve arrangement (106) is preceded by

receiving (212) level information indicating that the sample receiver (108) is filled up to a target level.

3. The method according to any one of the preceding claims, wherein opening (208) of the first valve arrangement (104) comprises filtering air that enters the sample receiver (108).

4. The method according to any one of the preceding claims, wherein the first valve arrangement (104) comprises

a first valve (1 14) connected to provide fluid communication between the sample receiver (108) and a volume (1 10) of the vacuum vessel (102) that is located above a product level (1 1 1 ) of a product that is held in the vacuum vessel (102), and a second valve (1 16) connected to provide fluid communication between the sample receiver (108) and the atmosphere surrounding the sample receiver (108).

5. The method according to any one of the preceding claims, wherein the second valve arrangement (106) comprises

a third valve (1 18) connected to provide fluid communication between the sample receiver (108) and a volume (1 12) of the vacuum vessel (102) that is located below a product level (1 1 1 ) of a product that is held in the vacuum vessel (102), and a fourth valve (120) connected to provide fluid communication between the sample receiver (108) and the atmosphere surrounding the sample receiver (108).

6. The method according to any one of the preceding claims, comprising cleaning (214) the system (100) by

connecting (216) a cleaning-in-place (CIP) system to the system (100), cleaning (218) the first valve arrangement (104) and the sample receiver (108), and thereafter

cleaning (220) the second valve arrangement (106).

7. The method according to claims 5 and 6,

wherein the step of connecting (216) the CIP system to the system (100) comprises

connecting the CIP system to the second valve arrangement (106), and wherein the step of cleaning (218) the first valve arrangement (104) and the sample receiver (108) comprises opening the first valve (1 14), closing the second valve (1 16), closing the third valve (1 18) and opening the fourth valve (120), and

wherein the step of cleaning (220) the second valve arrangement (106) comprises closing the first valve (1 14), closing the second valve (1 16), opening the third valve (1 18) and opening the fourth valve (120).

8. The method according to claim 7,

wherein the step of cleaning (218) the first valve arrangement (104) and the sample receiver (108) is preceded by

disconnecting (222) a hose (124a), arranged between a filter (122) and the first valve arrangement (104), from the filter (122), and

connecting (224) the hose (124b) to the vacuum vessel (102) such that the hose (120b) is arranged between the first valve arrangement (104) and the vacuum vessel (102), and

wherein the step of cleaning (218) the first valve arrangement (104) and the sample receiver (108) comprises cleaning (226) the hose (124b) by closing the first valve (1 14), opening the second valve (1 16), closing the third valve (1 18) and opening the fourth valve (120).

9. The method according to any one of the preceding claims, wherein the product is a fluid food product.

10. A method according to any one of the preceding claims, wherein the sample receiver (108) comprises an upper section (1081 ) and a lower section (1082), the upper section (1081 ) being, as seen in a vertical direction (D), at least partly located above the lower section (1082),

the opening (202) that allows pressure levels inside the vacuum vessel (102) and the sample receiver (108) to be equalized comprises letting gas flow out from the sample receiver (108) via the first valve arrangement (104),

the opening (204) that allows product to flow from the vacuum vessel (102) into the sample receiver (108) comprises letting product flow into the sample receiver (108) via the second valve arrangement (106),

the opening (208) that allows pressure levels inside the sample receiver (108) and the surrounding atmosphere to equalize comprises letting gas flow into the sample receiver (108) via the first valve arrangement (104), and

the opening (210) that allows the product to flow out from the sample receiver (108) comprises letting product flow out from the sample receiver (108) via the second valve arrangement (106).

1 1 . A system (100) for obtaining a product sample from a vacuum vessel (102), said system (100) comprising

a first valve arrangement 104) configured to be connected to be in fluid communication with an upper volume (1 10) of the vacuum vessel (102), and

a second valve arrangement (106) configured to be connected to be in fluid communication with a lower volume (1 12) of the vacuum vessel (102),

a sample receiver (108) arranged between the first valve arrangement (104) and the second valve arrangement (106),

wherein the first valve arrangement (104) is arranged to

- provide fluid communication between an upper volume (1 10) of the vacuum vessel (102) and the sample receiver (108), such that pressure levels inside the vacuum vessel (102) and the sample receiver (108) are equalized,

- prevent fluid communication between the upper volume (1 10) and the sample receiver (108), and

- provide fluid communication between surrounding atmosphere and the sample receiver (108), such that pressure levels inside the sample receiver (108) and the surrounding atmosphere are equalized, wherein the second valve arrangement (106) is arranged to

- provide fluid communication between a lower volume (1 12) of the vacuum vessel (102) and the sample receiver (108), such that product flows from the vacuum vessel (102) into the sample receiver (108),

- prevent fluid communication between the lower volume (1 12) and the sample receiver (108), and

- provide fluid communication between the surrounding atmosphere and the sample receiver (108), such that the product flows out from the sample receiver (108).

12. The system (100) according to claim 1 1 , wherein the first valve arrangement (104) is connected to a filter (122).

13. The system (100) according to claim 12, wherein the first valve arrangement (104) and the filter (1 18) is connected to each other via a hose (124a) during a sample reception state, wherein the hose is releasably attached to the filter (122) such that the hose (120b) during a cleaning state can be released from the filter (122) and attached to a connector (126) of the vacuum vessel (102) such that fluid communication is provided between the hose (124b) and the upper volume (1 10) of the vacuum vessel (102).

14. The system (100) according to any one of claims 1 1 to 13, wherein the sample receiver (108) comprises a level indicator (128).

15. The system (100) according to any one of claims 1 1 to 14, comprising a control device (130) configured to execute software instructions for obtaining a sample, wherein said instructions controls the valve arrangements (104, 106) to

open (202) the first valve arrangement (104) to provide fluid communication between an upper volume (1 10) of the vessel (102) and the sample receiver (108), such that pressure levels inside the vacuum vessel (102) and the sample receiver (108) are equalized,

open (204) the second valve arrangement (106) to provide fluid communication between a lower volume (1 12) of the vessel (102) and the sample receiver (108), such that product flows from the vacuum vessel (102) into the sample receiver (108),

close (206) the first valve arrangement (104) and the second valve arrangement (106), to prevent fluid communication between the upper and lower volumes (1 10, 1 12) and the sample receiver (108),

open (208) the first valve arrangement (104) to provide fluid communication between surrounding atmosphere and the sample receiver (108), such that pressure levels inside the sample receiver (108) and the surrounding atmosphere are equalized, and

open (210) the second valve arrangement (106), to provide fluid communication between the surrounding atmosphere and the sample receiver (108), such that the product flows out from the sample receiver (108).