摘要:

This article discusses how pressure‐valves function in a treatment plant or distribution system. The capabilities and limitations of the valves are discussed as well as the role of utility operators in maximizing their efficiency.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1988.tb01186.x

出版商:Wiley    

年代:1988

数据来源: WILEY

摘要:

This article discusses the selection, fitting, cleaning and disinfection, and testing and inspection of respiratory protection equipment.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1988.tb01187.x

出版商:Wiley    

年代:1988

数据来源: WILEY

摘要:

This article describes the use and construction of a valve box jet which is uses an air‐jet to clean valve boxes easily and inexpensively. The jet works on a vortex principle; air is forced to the top of the jet creating a suction at the bottom that pulls dirt out of the box. The jet has fingers cut into the bottom that aid in loosening dirt.

ISSN:0149-8029    

DOI:10.1002/j.1551-8701.1988.tb01188.x

出版商:Wiley    

年代:1988

数据来源: WILEY