CSA C22.2 NO. 139-1982 (R2005)

1. Scope

1.1

This Standard applies to electrically operated, general- purpose valves and safety valves that are intended to be used in ordinary locations in accordance with the Canadian Electrical Code, Part I, for the control of fluids (e.g., air, gases, oils, refrigerants, steam, water, etc.), and rated 600 V and less.

For convenience, the shorter term ""valve"" is used where the same requirements apply to both general-purpose and safety valves.

1.2

This Standard applies also to valves intended to be incorporated into equipment that is subject to the requirements of other Standards of Part II of the Code.

1.3

This Standard also applies to electrically powered mechanisms that are designed to provide the signals needed for monitoring valve operation from a remote location and to electrically powered valve actuators that are designed to be fitted to valves, except for: (a) Those utilizing 1/2 hp or larger motors; or (b) Those intended for use on valves connected in larger than 3- inch pipe size systems.

1.4

This Standard contains requirements for electrical features of valves and requirements for mechanical features of valves that affect their safe operation.

1.5

This Standard does not include requirements for mechanical and operational features that do not directly affect the safe operation of a valve.

1.6

In respect to construction and tests of electrical features, the requirements of this Standard complement those of CGA Standard 3.9, Automatic Fail-Safe Safety Shut-Off Valves.