Valve

Patent metadata

Field	Value
Publication number	US-10060553-B2
Application number	US-201515126122-A
Country	US
Kind code	B2
Filing date	Mar 26, 2015
Priority date	Mar 31, 2014
Publication date	Aug 28, 2018
Grant date	Aug 28, 2018

Abstract

A valve including a valve housing through which a process medium can flow and in which a valve seat is located, which surrounds a through-flow opening and to which a valve member mounted on a spindle is assigned in such a way that the valve member can be moved by means of an actuating stroke of the spindle between a blocking position in which the valve member bears against the valve seat in a process medium-tight manner and an open position in which the valve member is raised off the valve seat, and wherein an interface for coupling a drive unit generating the actuating stroke of the spindle is provided on the valve housing, and wherein a sealing device through which the spindle passes is accommodated in the valve housing, the sealing device is accommodated in a seal cartridge which is separate from the valve housing and configured as an operational pre-assembly.

First claim

The invention claimed is:

1. A valve comprising a valve housing through which a process medium can flow and in which a valve seat is located, which surrounds a through-flow opening and to which a valve member mounted on a spindle is assigned in such a way that the valve member is moved by means of an actuating stroke of the spindle between a blocking position in which the valve member bears against the valve seat in a process medium-tight manner and an open position in which the valve member is raised off the valve seat, and wherein an interface for coupling a drive unit generating the actuating stroke of the spindle is provided on the valve housing, and wherein a sealing device through which the spindle passes is accommodated in the valve housing, the sealing device comprising a spring and a seal assembly including sealing means bearing against the spindle while forming a seal and wherein the sealing device is accommodated in a seal cartridge which is separate from the valve housing and configured as an operational pre-assembly and which comprises a cartridge housing, which is secured to the valve housing, and in which the seal assembly and the spring are accommodated in such a way that the seal assembly is resiliently preloaded against the cartridge housing by the spring, and
wherein the cartridge housing has a locating section comprising an encasing region and a base region, the encasing region encasing the seal assembly and the spring, and the base region provided with a central through-hole, and
wherein the base region has an inner cone surface complementing a mating outer cone surface formed on the seal assembly, wherein the diameter of the through-hole is greater than the outer diameter of an end region of the seal assembly to such an extent that the seal assembly, owing to the mutually complementary cone surfaces and the preload generated by the spring, projects through the through-hole, terminating outside the encasing region with its free end.

2. A valve according to claim 1 , wherein the seal cartridge has a mounting interface for self-retaining mounting on the valve housing, the mounting interface being formed on the cartridge housing.

3. A valve according to claim 2 , wherein the mounting interface has a male thread formed on the outer surface of the cartridge housing.

4. A valve according to claim 3 , wherein the cartridge housing has a cover section, which is connected to the locating section and has a through-opening for the spindle, and on which the mounting interface is formed, the cover section being cylindrical and the male thread for tightening into the valve housing being formed on a lateral surface of the cartridge housing.

5. A valve according to claim 4 , wherein the cover section has a support surface, which faces the locating section and on which the spring is supported.

6. A valve according to claim 4 , wherein the cover section and the locating section are welded to one another.

7. A valve according to claim 1 , wherein the sealing device comprises a sealing unit, which is formed separately from the seal assembly and bears against the spindle while forming a seal, and which is positioned at an axial distance from the seal assembly, the sealing unit comprising at least one annular sealing element with at least one sealing lip bearing against the spindle to form a seal.

8. A valve according to claim 7 , wherein the annular sealing element comprises at least two axially spaced sealing lips.

9. A valve according to claim 7 , wherein the sealing unit is located in a cover section of the cartridge housing.

10. A valve according to claim 1 , wherein the valve housing is constructed in several parts, with a fluid ducting part including the valve seat and a separately formed hollow-cylindrical interface part with the interface for coupling the drive unit.

11. A valve according to claim 10 , wherein the interface part is releasably secured to the fluid ducting part.

12. A valve according to claim 11 , wherein the releasable connection between the interface part and the fluid ducting part is implemented by way of a screw connection which comprises a male thread formed on the interface part and a female thread formed on a coupling section of the fluid ducting part.

13. A valve according to claim 10 , wherein the seal cartridge is accommodated in the interface part and releasably secured there.

Assignees

• Festo Ag & Co Kg

Inventors

• Hotz Jasmin
• Dreher Markus
• Kanthack Michael

Classifications

• F16K41/02 Primary

  with stuffing-box {; Sealing rings} · CPC title

• F16K27/102

  for lift-valves · CPC title

• F16K1/10

  in which the spindle is inclined to the general direction of flow · CPC title