It provides guidelines for operating manually actuated valves, focusing on the operator's input to ensure safety and reduce wear on equipment.
It is available for purchase as a secure PDF or printed book from the MSS Official Store or authorized distributors like the Accuris Standards Store and the ANSI Webstore .
: Analyzing the physical ability of an operator to apply force to handwheels or levers. Operating Factors
Q: Can I purchase a hardcopy of MSS SP-91? A: Yes, you can purchase a hardcopy of MSS SP-91 from the MSS or ASME websites.