ISO 7259:1988
Predominantly key-operated cast iron gate valves for underground use
| Fecha edición: |
2015-04-01
Anulada
|
|---|---|
| Fecha cancelación: | 2015-04-01 |
| Idiomas disponibles: | Francés, Inglés |
| Resumen: | Specifies requirements for two types of predominantly key-operated valves for underground use with flanges or spigot ends or socket ends. The two types shall be specified as type A or type B and shall include the following features: inside screw stem; wedge or parallel obturator; metallic or elastomeric obturator seatings; metallic or elastomeric body seatings; ferrous metal and/or copper alloy trims; T-key operation; ring key and bar operation. Type A valves are for T-key operation; type B valves are for ring key and bar operation. |
| ICS: | 23.060.30 - Válvulas de compuerta, 91.140.60 - Sistemas de abastecimiento de agua |
| CTN: | ISO/TC 153 - 53156 |
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Anulaciones Normas |










