CA2093539A1 - Knife Valve - Google Patents
Knife ValveInfo
- Publication number
- CA2093539A1 CA2093539A1 CA 2093539 CA2093539A CA2093539A1 CA 2093539 A1 CA2093539 A1 CA 2093539A1 CA 2093539 CA2093539 CA 2093539 CA 2093539 A CA2093539 A CA 2093539A CA 2093539 A1 CA2093539 A1 CA 2093539A1
- Authority
- CA
- Canada
- Prior art keywords
- blade
- stem
- seat
- valve
- angular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Sliding Valves (AREA)
Abstract
KNIFE VALVE
Abstract A knife valve comprises a body defining a valve seat and a knife blade longitudinally movable by a cylindrical stem in the body for opening and closing a lateral flow passage defined therethrough.
The body includes a bonnet with the stem extending therethrough and with circular packing rings being disposed therein around the stem. The valve seat is located on a first side of the blade and in operative proximity thereto. The stem includes a lower head portion which defines an angular surface, whereas a top portion of the blade defines a slot forming an angular surface parallel to the angular surface of the stem head. The stem head is engageable in the slot with the angular surfaces thereof being in sliding contact. Therefore, when the blade is in its closed position, a longitudinal force exerted by the stem on the blade is transferred into a lateral force oriented towards the seat, thereby forcing the blade against the seat in a tight bidirectional seal under a positive torque. Angular lugs provided on a lower second side of the blade cooperate with tapered lower edges of the blade to also urge the blade against the seat in its closed position. A bypass arrangement is provided in the bonnet around the stem for communication with the valve passage to prevent the pulp fibers from accumulating in the bonnet and jamming the stem. A resilient seat is mounted to the valve body on the first side of the blade.
Abstract A knife valve comprises a body defining a valve seat and a knife blade longitudinally movable by a cylindrical stem in the body for opening and closing a lateral flow passage defined therethrough.
The body includes a bonnet with the stem extending therethrough and with circular packing rings being disposed therein around the stem. The valve seat is located on a first side of the blade and in operative proximity thereto. The stem includes a lower head portion which defines an angular surface, whereas a top portion of the blade defines a slot forming an angular surface parallel to the angular surface of the stem head. The stem head is engageable in the slot with the angular surfaces thereof being in sliding contact. Therefore, when the blade is in its closed position, a longitudinal force exerted by the stem on the blade is transferred into a lateral force oriented towards the seat, thereby forcing the blade against the seat in a tight bidirectional seal under a positive torque. Angular lugs provided on a lower second side of the blade cooperate with tapered lower edges of the blade to also urge the blade against the seat in its closed position. A bypass arrangement is provided in the bonnet around the stem for communication with the valve passage to prevent the pulp fibers from accumulating in the bonnet and jamming the stem. A resilient seat is mounted to the valve body on the first side of the blade.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US90312592A | 1992-06-23 | 1992-06-23 | |
US903,125 | 1992-06-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2093539A1 true CA2093539A1 (en) | 1993-12-24 |
CA2093539C CA2093539C (en) | 1995-01-17 |
Family
ID=25416987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2093539 Expired - Fee Related CA2093539C (en) | 1992-06-23 | 1993-04-06 | Knife valve |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2093539C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11543036B1 (en) | 2021-06-23 | 2023-01-03 | 1441599 Alberta Ltd. | Isolation knife gate valve |
-
1993
- 1993-04-06 CA CA 2093539 patent/CA2093539C/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11543036B1 (en) | 2021-06-23 | 2023-01-03 | 1441599 Alberta Ltd. | Isolation knife gate valve |
Also Published As
Publication number | Publication date |
---|---|
CA2093539C (en) | 1995-01-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |