Automatic Electrical Controls for Household and Similar Use - Part 2-8: Particular Requirements for Electrically Operated Water Valves, Including Mechanical Requirements

(The New Edition is currrently being worked on.)

1. Scope

This clause of part 1 is replaced as follows:

Replacement:

1.1 This part 2-8 applies to electrically operated water valves for use in, on or in association with equipment for household and similar use that may use electricity, gas, oil, soild fuel, solar thermal energy, etc. or a combination thereof, including heating, air-conditioning and similar applications.

This part 2-8 is also applicable to electrically operated water valves for appliances within the scope of IEC 60335.

1.1.1 This part 2-8 contains requirements for electrical features of water valves and requirements for mechanical features of valves that affect their intended operation.

1.1.2 This part 2-8 applies to the inherent safety, to the operating valves, operating sequences where such are associated with equipment protection, and to the testing of automatic electrical controls used in, on or in association with household and similar equipment.

Electrically operated valves for equipment not intended for normal household use but which may nevertheless be used by the public, such as equipment intended to be used by laymen in shops, in light industry and on farms, are within the scope of this part 2-8.

This part 2-8 does not apply to electrically operated water valves designed exclusively for industrial applications.

This part 2-8 does not apply to:

- electrically operated water valves of nominal connection size above DN 50; - electrically operated water valves for admissible nominal pressure rating above 1,6 MPa; - food dispensers; - detergent dispensers; - steam valves.

Throughout this part 2-8, where it can be used unambiguously, the term:

- "valve"is used to denote an electrically operated water valve (including actuator and valve body assembly); - "actuator" means "electrically operated mechanism or prime mover"; - "valve body" means "valve body assembly"; - "equipment" includes "appliance" and "control system".

1.1.3 This part 2-8 also to actuators and to valve bodies which are designed to be fitted to each other.

1.1.4 This part 2-8 applies to individual valves, valves utilized as part of a system and valves mechanically integral with multi-functional controls having non-electrical outputs.

NOTE Attention is drawn to the fact that, in many countries, additional test requirements and by-laws have been established by the water authorities or companies.

1.5 Normative references

This clause of part 1 is applicable except as follows:

Addition:

ISO 7-1:1994, Pipe threads where pressure-tight joints are made on the threads - Part 1: Dimensions, tolerances and designation

ISO 65:1981, Carbon steel tubes suitable for screwing in accordance with ISO 7-1

ISO 228-1:1994, Pipe threads where pressure-thight joints are not made on the threads - Part 1:Dimensions, tolerances and designation

ISO 630:1995, Structural steels - Plates, wide flats, bars sections and profiles

ISO 1179:1981, Pipe connections threaded to ISO 228-1 for plain end steel and other metal tubes in industrial applications

ISO 4144:1979, Stainless steel fittings threaded to ISO 7-1

ISO 4400:1994, Fluid power systems and components - Three-pin electrical plug connectors with earth contact - Characteristics and requirements

ISO 6952:1994, Fluid power systems and components - Two-pin electrical plug connectors with earth contact - Characteristics and requirements