Patent ID: 8590861
Filing Date: 2013-11-26
Classification: F16K

Abstract:
1. A gate valve apparatus comprising: a valve casing that includes a first valve seat and a second valve seat, and in which an opening portion is formed, the valve casing being made of a conductive metal; a closure element that is capable of closing the opening portion a sealing member that is provided in the closure element, and contacts the first valve seat thereby to seal the opening portion when the closure element closes the opening portion; and a shutoff member that is made of a thin conductive metal plate and attached in the closure element, and contacts the second valve seat thereby to shut off a space between the opening portion and the sealing member and to electrically connect the shutoff member with the valve casing through the second valve seat when the closure element closes the opening portion, wherein the shutoff member is caught between a spacer and a fixing member, the spacer being mounted on the closure element, and the shutoff member is attached to the closure element by a screw passing through the fixing member, the shutoff member and the spacer, and wherein the valve casing, the shutoff member, the fixing member, the spacer and the screw are made of conductive metal, and transfer heat from the valve casing to the closure element when the shutoff member closes the opening portion.