The invention relates to a control valve (10) for controlling a fluid flow, comprising a valve housing (22) and a positioning element (12) which can be translationally moved and which includes a shut-off portion (14, 70) and a throttle portion (16), with a valve seat being furthermore provided which
The invention relates to a control valve (10) for controlling a fluid flow, comprising a valve housing (22) and a positioning element (12) which can be translationally moved and which includes a shut-off portion (14, 70) and a throttle portion (16), with a valve seat being furthermore provided which includes a sealing portion (18, 44) and a throttle opening portion (28, 46), with the shut-off portion (14, 70) of said positioning element (12) being adapted to cooperate with the sealing portion (18, 44) of the valve seat (20, 40) so as to enable shut-off of the fluid flow, and with the throttle portion (16) of the positioning element (12, 54) being adapted to cooperate with the throttle opening portion (28, 46) of the valve seat (20, 40, 60) so as to enable the setting of a defined fluid flow, with at least the surfaces of the throttle opening (28) and the sealing portion (18, 44) being furthermore made of the same hard material. The invention is characterized in that the valve seat is designed as a valve seat insert (20, 40, 60) which includes the throttle opening portion (28, 46) and the sealing portion (18, 44), said insert being inserted into the valve housing.
대표청구항▼
1. Control valve (10) for controlling a fluid flow, comprising: a valve housing (22) and a positioning element (12) which can be translationally moved;said positioning element includes a shut-off portion (14, 70) and a throttle portion (16);a valve seat (20, 40) includes a sealing portion (18, 44) a
1. Control valve (10) for controlling a fluid flow, comprising: a valve housing (22) and a positioning element (12) which can be translationally moved;said positioning element includes a shut-off portion (14, 70) and a throttle portion (16);a valve seat (20, 40) includes a sealing portion (18, 44) and a throttle opening portion (28, 46), with said shut-off portion (14, 70) of said positioning element (12) being adapted to cooperate with said sealing portion (18, 44) of said valve seat (20, 40) so as to enable shut-off of said fluid flow, and said throttle portion (16) of said positioning element (12, 54) being adapted to cooperate with said throttle opening portion (28, 46) of said valve seat (20, 40) so as to enable setting of a defined fluid flow;said throttle opening (28) includes surfaces;said surfaces of said throttle opening (28) and said sealing portion (18, 44) being made of the same hard material;an elastic element (48);said valve seat includes a valve seat insert;an intermediate bush (42);said valve seat insert is supported on said intermediate bush (42) through said elastic element (48);said valve seat insert includes said throttle opening portion (28, 46) and said sealing portion (18, 44);said valve seat insert is press-fitted in said intermediate bush (42); and,said intermediate bush is inserted in said valve housing (22). 2. The control valve of claim 1 wherein said valve seat insert is integrally formed from a solid material. 3. The control valve of claim 1 wherein said valve seat insert material is harder by at least 10 HRC than the material of said positioning element (12) in said shut-off portion (14). 4. The control valve of claim 1 wherein the material of said valve seat insert is a ceramic material, a hard metal, or stellite. 5. The control valve of claim 1 wherein said hard material is a hardened material of a hardness of more than 65 HRC. 6. The control valve of claim 1 wherein said throttle portion (16) of said positioning element (12) is made from ceramic, hard metal, or stellite. 7. The control valve of claim 1 wherein said throttle portion (16) includes an idle stroke section (24) and a control section (26), where any change in position of said positioning element (12) in said idle stroke section (24) relative to said throttle opening (28) will not result in a significant change of the flow behaviour, said idle stroke section (24) being located between said control section (26) and said shut-off portion (14). 8. Control valve (10) for controlling a fluid flow, comprising: a valve housing (22) and a positioning element (12) which can be translationally moved;said positioning element includes a shut-off portion (14, 70) and a throttle portion (16);a valve seat (20, 40) includes a sealing portion (18, 44) and a throttle opening portion (28, 46), with said shut-off portion (14, 70) of said positioning element (12) being adapted to cooperate with said sealing portion (18, 44) of said valve seat (20, 40) so as to enable shut-off of said fluid flow, and said throttle portion (16) of said positioning element (12, 54) being adapted to cooperate with said throttle opening portion (28, 46) of said valve seat (20, 40) so as to enable setting of a defined fluid flow;said throttle opening (28) includes surfaces;said surfaces of said throttle opening (28) and said sealing portion (18, 44) being made of the same hard material;an elastic element (48);said valve seat is designed as a valve seat insert;an intermediate bush (42);said valve seat insert is supported on said intermediate bush (42) through said elastic element (48);said valve seat insert includes said throttle opening portion (28, 46) and said sealing portion (18, 44);said valve seat insert is press-fitted into an intermediate bush (42); and,and said intermediate bush (42) is threaded into said valve housing (22).
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이 특허에 인용된 특허 (6)
Cleveland John T. (Houston TX) Chappell Walter L. (Houston TX) Watts John D. (Houston TX), Adjustable choke.
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