Claims
- 1. A pressure resistant process window for visual or spectroscopic examination of pressurized products in a pipe or a reactor comprising:(A) at least one measurement-cell body that is connected to a pipe or a reactor, and a transparent window pane having (i) a central region, (ii) an outer region, and (iii) a wall thickness in the central region that is greater than a wall thickness in the outer region, wherein the window pane is sealed against the measurement-cell body with a screw barrel having an external thread that can be screwed into a hollow barrel that (a) has an internal thread that is connected to the measurement-cell body, and (b) is connected to the measurement-cell body in a pressure-resistant or in a pressure-resistant and detachable manner; and (B) a seal between the measurement-cell body and the window pane for sealing the reactor interior or pipe interior from surroundings of the reactor interior or pipe interior.
- 2. The process window according to claim 1, wherein the hollow barrel has an annular sealing surface on which the window pane contacts in a pressure-resistant manner.
- 3. The process window according to claim 1, wherein the hollow barrel is designed in one piece with the measurement-cell body or is welded thereto.
- 4. The process window according to claim 1, wherein the hollow barrel is connected to the measurement-cell body in a pressure-resistant, detachable manner.
- 5. The process window according to claim 1, wherein a ring with low friction against the barrel or the window pane is present between the screw barrel and the window pane.
- 6. The process window according to claim 5, wherein the ring is graphite.
- 7. The process window according to claim 5, wherein two rings which are in sliding contact with one another are present instead of a ring.
- 8. The process window according to claim 1, wherein the window pane extends into the pipe or the reactor with the central region and is surrounded on its periphery by a protective sleeve.
Priority Claims (1)
Number |
Date |
Country |
Kind |
199 13 730 |
Mar 1999 |
DE |
|
Parent Case Info
This application is the National Stage Application of PCT/EP00/02239, which claims a priority from German Application 199 13 730.7 filed Mar. 26, 1999.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/EP00/02239 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO00/58711 |
10/5/2000 |
WO |
A |
US Referenced Citations (7)
Number |
Name |
Date |
Kind |
3886364 |
Walker et al. |
May 1975 |
A |
4575869 |
Torrisi et al. |
Mar 1986 |
A |
4738064 |
Aarts et al. |
Apr 1988 |
A |
4910403 |
Kilham et al. |
Mar 1990 |
A |
5003174 |
Datwyler et al. |
Mar 1991 |
A |
5062706 |
Magnussen, Jr. |
Nov 1991 |
A |
5151474 |
Lange et al. |
Sep 1992 |
A |
Foreign Referenced Citations (2)
Number |
Date |
Country |
0 493 746 |
Jul 1992 |
EP |
2067407 |
Mar 1991 |
FR |