| 
                            
                                |  |  
                                |   |  
		                        | National Stock Number:
 4820-01-243-0039
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 012430039
 
 Description:
 VALVE,PRESSURE EQUALIZING,GASEOU
 
 Detail:
 A VALVE CONSISTING OF A SINGLE DEADWEIGHT LOADED DISK, OR TWO DEADWEIGHT LOADED DISKS EACH WITH A SEPERATE SEAT. IT IS SPECIFICALLY DESIGNED FOR THE RELIEF OF SMALL PRESSURE AND VACUUM CONDITIONS WITHIN A TANK OR OTHER CONTAINER TO OR FROM THE ATMOSPHERE. THE CENTER OF A SINGLE DEADWEIGHT LOADED DISK MAY CONTAIN A SPRING LOADED DISK FORMING AN ADDITIONAL SEAT OR APERTURE. IT MAY BE SPRING LOADED AND/OR EQUIPPED WITH A MANUAL UNLOADER ON EITHER THE PRESSURE OR VACUUM SIDE. EXCLUDE VALVE, VACUUM BREAKING.
 |  
		                        | 
 Manufacturer Information:
 
 | 14720-201 | 94756 | THE BOEING COMPANY |  | 14720-201-1 | 94756 | THE BOEING COMPANY | 
 |  
					            | 
 Techincal Specification:
 
 | FURNISHED ITEMS | CAP AND CHAIN AND WASHER |  | PROPRIETARY CHARACTERISTICS | PACS | 
 |  |