ISA TR96.05.01

ANSI/ISA-TR96.05.01 is informative and does not contain anymandatory requirements.

ANSI/ISA-TR96.05.01 is limited to automated valves normallyoperating in either a full open or full closed position.

The boundary of the automated valve includes the following:

a) Limit switches and other monitoring devices

b) Air regulation and filtration system

c) Actuated valves whose fail position is specified asspring-return fail closed, spring-return fail open, or doubleacting

d) Valve body specified to meet the functional requirements forits application

ANSI/ISA-TR96.05.01 does not address automated valves used forregulatory control applications.

Guidance is provided on the following:

a) Identifying when partial stroke testing may be useful

b) Various criteria to consider when selecting the partialstroke method, e.g., automated versus manual test execution,spurious trip potential, and on-line maintainability

c) The advantages and disadvantages of three basic types ofpartial stroke test methods: mechanical limiting, positioners, andsolenoid operated valves

d) The use of diagnostic coverage factors in the performancecalculations for an automated block valve being partial stroketested periodically

Edition:

08

Published:

05/04/2008

ANSI:

ANSI Approved

Number of Pages:

28

File Size:

1 file , 340 KB