Shut-off fitting

• US 20090014676A1
• Filed: 08/21/2008
• Published: 01/15/2009
• Est. Priority Date: 06/27/2002
• Status: Active Grant

• Current Assignee: E. Hawle Armaturenwerke GmbH
• Original Assignee: E. Hawle Armaturenwerke GmbH
• Inventors: Fuhrer, Gerhard, Pohn, Franz Johann, Berger, Christian, Schlagnitweit, Rupert
• Granted Patent: US 7,950,625 B2
• Time in Patent Office: Days
• US Class Current: 251/327
• CPC Class Codes: F16K 3/28 with resilient valve members

Abstract

A shut-off instrument for a flow medium, in particular a slide valve instrument designed for pressurization on both sides with an instrument housing forming a flow channel and a slide valve chamber and with a soft-sealing shut-off element closing off the flow channel and with a slide valve stem which penetrates a seal arrangement and/or bearing arrangement in a housing neck extension delimiting the slide valve chamber and which is rotationally connected to a stem nut coupled to the shut-off element by a screw contact. The shut-off element is designed to include more than one part and at least one external dimension of the main body is slightly smaller than a nominal width of the flow channel and seal elements are arranged on opposite support surfaces of the main body via an engaged connection projecting over the external dimension with a peripheral edge collar.

Claims

1. Shut-off element (23) for a shut-off instrument (1) for a flow medium with a disc-shaped main body (28) provided on opposite support surfaces (32) with soft seal sealing elements (34), and with a mounting bore (45) penetrating the disc-shaped main body for a slide valve stem (16), wherein on the support surfaces (32) ribs (33) projecting over their surfaces are arranged for forming a structure, for the engaged arrangement of the seal elements (34) provided with a compatible structure, and the seal elements (34) on the disc-shaped main body (28) are secured by support discs (40) arranged on opposite end faces (39) of the seal elements (34) by means of securing means (41) penetrating the support discs (40), seal elements (34) and the disc-shaped main body (28) in bores (42).

2. Shut-off element (23) according to claim 1, wherein the disc-shaped main body (28) comprises a hollow body (121) or wall discs (117, 118) connected by wall sections (119) and spacer sleeves (120).

3. Shut-off element according to claim 1, wherein the disc-shaped main body is provided with at least one flattened section (123) which is formed in a plane running perpendicular to a longitudinal middle axis (24).

4. Shut-off element according to claim 3, wherein in the region of the at least one flattened section (123) in the disc-shaped main body (28) a compensating element (127) is arranged secured preferably by a plug-and-socket connection (126).

5. Shut-off element according to claim 1, wherein the disc-shaped main body (28) is provided with coupling grooves (30) for mounting coupling means (31) of a stem nut (19).

6. Shut-off element according to claim 1, wherein the disc-shaped main body (28) is provided with a guide elements (50, 97) projecting over an external outline.

7. Shut-off element according to claim 1, wherein the guide elements (50, 97) are secured in the disc-shaped main body (28).

8. Shut-off element according to claim 1, wherein the guide elements (50, 97) are connected in one piece with the disc-shaped main body (28).

9. Shut-off element according to claim 1, wherein the sealing elements (34) are connected to the support discs (40) and the guide elements (50) by securing means (41), arranged in a main body middle plane running perpendicular to a longitudinal middle axis (24).

10. Shut-off element according to claim 1, wherein the sealing elements (34) are penetrated by the securing means (41) in bores (42), whereby the bores (42) are pressure-tight with the securing means (41).

11. Shut-off element according to claim 1, wherein a sealing collar (107) is arranged surrounding the bore (42) on the sealing element (34).

12. Shut-off element according to claim 1, wherein to mount the sealing collar (107) in the disc-shaped main body (28) a mount (108) is arranged for the sealing collar (107) surrounding the bore (42).