# US 2014/0151592 A1 · Butterfly valve and method of checking for leaks in the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151592 A1 - Document ID: US20140151592A1 - Status: Published application - Kind: A1 - Application number: 13/829,751 - Filed: 2013-03-14 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Jae-Dong Ha - Web page: https://patentgrep.com/patent/US20140151592A1 ## CPC - G01M 3/224: {for valves} - F16K 1/2261: {the sealing being arranged on the valve member} - F16K 37/0075: {For recording or indicating the functioning of a valve in combination with test equipment} - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} ## Abstract A butterfly valve is disclosed. In one aspect, the butterfly valve includes a pipe-shaped housing, a valve disk rotatably arranged within the pipe-shaped housing, a space forming member formed along an outer circumference of the valve disk, and a leak check port provided in the housing and configured to be connected to a space between the space forming member and the housing. ## Claims ### Claim 1 A butterfly valve comprising: a pipe-shaped housing; a valve disk rotatably arranged within the pipe-shaped housing; a space forming member formed along an outer circumference of the valve disk; and a leak check port formed in the pipe-shaped housing and configured to be connected to the space between the space forming member and the pipe-shaped housing. ### Claim 2 (depends on 1) The butterfly valve of claim 1, wherein the space forming member comprises a plurality of o-rings. ### Claim 3 (depends on 1) The butterfly valve of claim 1, wherein the space forming member includes a first o-ring and a second o-ring. ### Claim 4 (depends on 3) The butterfly valve of claim 3, wherein the first o-ring and the second o-ring are formed in substantially parallel to each other along the outer circumference of the valve disk. ### Claim 5 (depends on 3) The butterfly valve of claim 3, wherein a first groove and a second groove are formed along the outer circumference of the valve disk, wherein the first o-ring is inserted into the first groove, and wherein the second o-ring is inserted into the second groove. ### Claim 6 (depends on 5) The butterfly valve of claim 5, wherein the first and second grooves are formed in substantially parallel to each other along the outer circumference of the valve disk, and wherein the first and second o-rings are formed in substantially parallel to each other along the outer circumference of the valve disk. ### Claim 7 (depends on 6) The butterfly valve of claim 6, wherein the leak check port is configured to be connected to a space formed by the first o-ring, the second o-ring, the valve disk and the pipe-shaped housing in a state where the first and second o-rings are in close contact with the pipe-shaped housing. ### Claim 8 (depends on 1) The butterfly valve of claim 1, further comprising: a sealing member configured to seal off the leak check port by being coupled with the leak check port. ### Claim 9 (depends on 1) The butterfly valve of claim 1, further comprising: a leak detector connected to the leak check port. ### Claim 10 (depends on 9) The butterfly valve of claim 9, wherein the leak detector comprises a helium leak detector. ### Claim 11 A method of checking for a leak in a butterfly valve comprising a pipe-shaped housing and a valve disk rotatably arranged within the pipe-shaped housing, the method comprising: providing a space forming member formed along an outer circumference of the valve disk; providing a leak check port in the pipe-shaped housing so that the leak check port is connected to the space between the space forming member and the pipe-shaped housing; closing the butterfly valve by the rotation of the valve disk; connecting one end of the leak check port to a leak detector; creating a substantially vacuum state, with the use of the leak detector, within the space between the space forming member and the pipe-shaped housing; spraying a test gas toward the space forming member; and detecting the test gas with the use of the leak detector. ### Claim 12 (depends on 11) The method of claim 11, wherein the space forming member comprises a plurality of o-rings. ### Claim 13 (depends on 11) The method of claim 11, wherein the space forming member comprises a first o-ring and a second o-ring. ### Claim 14 (depends on 13) The method of claim 13, wherein the first and second o-rings are formed in parallel to each other along the outer circumference of the valve disk. ### Claim 15 (depends on 13) The method of claim 13, wherein a first groove and a second groove are formed along the outer circumference of the valve disk, wherein the first o-ring is inserted into the first groove, and wherein the second o-ring is inserted into the second groove. ### Claim 16 (depends on 15) The method of claim 15, wherein the first and second grooves are formed in substantially parallel to each other along the outer circumference of the valve disk, and wherein the first and second o-rings are formed in substantially parallel to each other along the outer circumference of the valve disk. ### Claim 17 (depends on 16) The method of claim 16, wherein the leak check port is connected to a space formed by the first o-ring, the second o-ring, the valve disk and the pipe-shaped housing in a state where the first and second o-rings are in close contact with the pipe-shaped housing. ### Claim 18 (depends on 11) The method of claim 11, wherein the one end of the leak check port is connected to the leak detector through a pipe. ### Claim 19 (depends on 11) The method of claim 11, further comprising: sealing off the leak check port after separating the leak detector from the one end of the leak check port. ### Claim 20 (depends on 11) The method of claim 11, wherein the leak detector is a helium leak detector, wherein the sprayed test gas is a helium gas, and wherein the helium gas is detected by the helium leak detector.