公开(公告)号：US3727878A

公开(公告)日：1973-04-17

申请号：US3727878D

申请日：1971-07-15

Applicant: NORRIS INDUSTRIES

Inventor： WILLMS C

IPC: A62C35/66 ,  A62C37/06 ,  F16K31/145

CPC classification number: A62C35/66 ,  Y10S137/907

Abstract: A component for automatic sprinkler systems employed for fire protection is provided which is useful in dry-pipe systems to cause rapid opening of the dry-pipe valve of such systems in response to a slight but rapid decrease of air pressure in the sprinkler piping network attendant upon opening of a sprinkler head. Slow decreases in such pressure in relation to atmospheric pressure are off-set by an atmospheric bleed valve, a readily accessible adjustment for altering and visibly indicating the trip-off pressure is provided, and provision is made for either electrical or pneumatic operation.

Abstract translation: 提供了用于防火的自动喷水灭火系统的部件，其在干管系统中有用，以响应于喷洒管道网络服务员中的空气压力的轻微而快速的降低而迅速打开这种系统的干管阀 打开喷头时。 相对于大气压力的这种压力的缓慢下降被大气泄放阀偏移，提供了用于改变和可视地指示脱扣压力的容易接近的调节，并且提供电气或气动操作。