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National Stock Number:
4240-00-021-2325
Federal Supply Class:
4240
National Item Identification Number:
000212325
Description:
VALVE,ANTIBACK DRAFT,PROTECTIVE
Detail:
AN ITEM CONSISTING OF A METAL FRAME, TO WHICH IS ATTACHED A HINGED METAL FLAPPER PLATE. THE FLUCTUATING FLAPPER PLATE AUTOMATICALLY REGULATES THE PRESSURE BETWEEN THE OUTER AIR LOCKS AND THE ATMOSPHERE OF PROTECTIVE SHELTERS. EXCLUDES DRAFT CONTROL, FLUE, AUTOMATIC.
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Manufacturer Information:
| 10104749 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| GENERAL CHARACTERISTICS ITEM DESCRIPTION | COMPONENTS,ANGLE,ALUMINUM ALLOY 1,BAR,ALUMINUM ALLOY 2,FRAME,AIR VALVE 1,HINGE,CONTINUOUS 2,HINGE,DOOR,AIR VALVE 1,INSERT 2,PANEL,LOUVERED 1,RECEPTACLE,TURNLOCK FASTENER 2,RIVET,SOLID 4,RIVET,UNIVERSAL HEAD 5,SHIM 1,STRIP,RUBBER,CELLULAR 1,STUD,TURNLOCK FASTENER 2,WASHER,SPRING TENSION 2; NOT DESIGNED FOR INSTALLATION IN RD PIPE; DESIGNED FOR INSTALLATION IN OTHER THAN RD PIPE,13 IN. W INPUT OPENING,13.750 IN. H INPUT OPENING |
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