Double-plate gate valve and shut-off plate for use in a double-plate gate valve
First Claim
1. Double-plate gate valve (10) for fittings of industrial plants, the double-plate gate valve (10) comprising:
- a housing (11) comprising at least one flushing gas connection (30); and
two shut-off plates (20a, 20b) inside the housing (11), the two shut-off plates being displaceable between an open and a closed position,wherein;
a sealing gas pressure is applied to the inside of the housing (11) via the at least one flushing gas connection (30);
at least one of the two shut-off plates (20a, 20b) is convexly deformed upon application of the sealing gas pressure; and
spring elements (25) such as disc spring packs are arranged between the shut-off plates (20a, 20b), pressing the shut-off plates (20a, 20b) in the closed position against sealing surfaces arranged on the housing (11) such that the entire sealing force required for sealing is provided by the spring elements (25).
1 Assignment
0 Petitions
Accused Products
Abstract
A double-plate gate valve 10 is proposed which is provided for fittings of industrial plants, in particular chemical and petrochemical plants, wherein the double-plate gate valve 10 comprises a housing 11 having two shut-off plates 20a, 20b inside the housing 11 which are displaceable between an open and a closed position, wherein spring elements 25 such as disc spring packs are arranged between the shut-off plates 20a, 20b pressing the shut-off plates 20a, 20b in the closed position against sealing surfaces arranged on the housing 11 such that the entire sealing force required for sealing is provided by the spring elements 25. Furthermore are proposed a shut-off plate 20 for use in an inventive double-plate gate valve 10 as well as a method for sealing the inventive double-plate gate valve using the inventive shut-off plates.
17 Citations
11 Claims
-
1. Double-plate gate valve (10) for fittings of industrial plants, the double-plate gate valve (10) comprising:
-
a housing (11) comprising at least one flushing gas connection (30); and two shut-off plates (20a, 20b) inside the housing (11), the two shut-off plates being displaceable between an open and a closed position, wherein; a sealing gas pressure is applied to the inside of the housing (11) via the at least one flushing gas connection (30); at least one of the two shut-off plates (20a, 20b) is convexly deformed upon application of the sealing gas pressure; and
spring elements (25) such as disc spring packs are arranged between the shut-off plates (20a, 20b), pressing the shut-off plates (20a, 20b) in the closed position against sealing surfaces arranged on the housing (11) such that the entire sealing force required for sealing is provided by the spring elements (25). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification