Control valve

Patent metadata

Field	Value
Publication number	US-2016018007-A1
Application number	US-201514804254-A
Country	US
Kind code	A1
Filing date	Jul 20, 2015
Priority date	Jul 21, 2014
Publication date	Jan 21, 2016
Grant date	—

Abstract

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.

First claim

1 . 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 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 said throttle opening ( 28 ) and said sealing portion ( 18 , 44 ) being furthermore made of the same hard material, 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 ), and, said insert being inserted into the valve housing.

2 . The control valve of claim 1 wherein the valve seat insert ( 20 , 40 ) is integrally formed from a solid material.

3 . The control valve of claim 2 wherein the hard material of the valve seat insert ( 20 , 40 ) is harder by at least 10 HRC than the material of the positioning element ( 12 ) in the shut-off portion ( 14 ).

4 . The control valve of claim 1 wherein the hard material of the valve seat insert ( 20 , 40 ) 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 the throttle portion ( 16 ) of the positioning element ( 12 ) is made from ceramic, hard metal, or stellite.

7 . The control valve of one of claim 1 wherein the throttle portion ( 16 ) includes an idle stroke section ( 24 ) and a control section ( 26 ), where any change in position of the positioning element ( 12 ) in the idle stroke section ( 24 ) relative to the throttle opening ( 28 ) will not result in a significant change of the flow behaviour, said idle stroke section ( 24 ) being located between the control section ( 26 ) and the shut-off portion ( 14 ).

8 . The control valve of one of claim 1 wherein the valve seat insert ( 40 ) is press-fitted into an intermediate bush ( 42 ) which latter is in turn inserted into the valve housing.

9 . The control valve of claim 8 further comprising said intermediate bush is a threaded bush ( 42 ).

10 . The control valve of claim 8 wherein the valve seat insert ( 40 ) is supported on the intermediate bush ( 42 ) through an elastic element ( 48 ).

11 . The control valve of claim 9 wherein the valve seat insert ( 40 ) is supported on the intermediate bush ( 42 ) through an elastic element ( 48 ).

Assignees

• Samson Ag

Inventors

• Eckholz Holger

Classifications

• F16K47/04

  for decreasing pressure {or noise level}, the throttle being incorporated in the closure member · CPC title

• F16K25/005

  Particular materials for seats or closure elements · CPC title

• F16K1/422

  attachable by a threaded connection to the housing · CPC title

• F16K1/38

  of conical shape · CPC title

• F16K1/42 Primary

  Valve seats (for double-seat valves F16K1/44) · CPC title