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Insert Butterfly Vacuum Valve Assembly

IP.com Disclosure Number: IPCOM000080670D
Original Publication Date: 1974-Jan-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 83K

Publishing Venue

IBM

Related People

Lester, WC: AUTHOR

Abstract

Butterfly vacuum valves find frequent application in vacuum systems because of their minimal surface area exposure to the vacuum system, simplicity of design and compactness. However, one prime disadvantage of such butterfly valve assemblies, is that the entire valve must be removed from the vacuum system for repair and servicing. This normally requires an extensive dismantling of the vacuum system, resulting in excessive system down time and labor costs.

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Insert Butterfly Vacuum Valve Assembly

Butterfly vacuum valves find frequent application in vacuum systems because of their minimal surface area exposure to the vacuum system, simplicity of design and compactness. However, one prime disadvantage of such butterfly valve assemblies, is that the entire valve must be removed from the vacuum system for repair and servicing. This normally requires an extensive dismantling of the vacuum system, resulting in excessive system down time and labor costs.

An insert type butterfly vacuum valve assembly has been designed to provide for removal of the entire valve assembly from the vacuum system, without dismantling of the system. As shown, a conventional butterfly valve 1 includes a valve insert assembly 2, which provides a sealing service for the valve. The valve actuator shaft 3 and shaft rotary feed-through 4 are also included in the valve insert assembly 2. The valve housing 5 is installed in a vacuum system in a conventional manner, similar to a cold trap or gate valve housing. Installation of the valve insert assembly 2 in the valve housing is accomplished in the following manner:
1) The front guide pins 6 (Fig. 3) are placed in the valve

guide slots 7.
2) The insert assembly 2 is slid into the valve housing 5,

until the rear guide pins 8 are engaged by the guide

slots 7.
3) Further insertion directs the insert assembly 2 downward

to contact the internal sealing 0-ring 9.
4) The valve insert assembly flange can then be l...