Valve-shaft-to-actuator key may fall out of place when mounted below horizontal axis.

Bibliographic Details
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : United States Nuclear Regulatory Commission, Office of Inspection and Enforcement, 1985.
Series:	NRC information notice ; 85-67.
Subjects:	Nuclear power plants > Piping > Valves. Actuators.
Online Access:	https://purl.fdlp.gov/GPO/gpo147402

Available Online