Devices to prevent pollution by backflow of potable water. In-line anti-vacuum valves DN 10 to DN 50 inclusive. Family D, type A
This document specifies the field of application, the dimensional, the physico-chemical, the design, the hydraulic, the mechanical, and the acoustic characteristics of in-line anti vacuum valve family D Type A.
This document covers in-line anti vacuum valve family D Type A, intended to prevent pollution of potable water by backflow, caused by backsiphoning only.
It is applicable to in-line anti vacuum valve in denominations DNÂ 10 up to DNÂ 50.
It covers in-line anti vacuum valve of PNÂ 10 that are capable of working without modification or adjustment:
at any pressure, up to 1Â MPa (10Â bar);
with any pressure variation, up to 1Â MPa (10Â bar);
in permanent duty at a limited temperature of 65 °C and for maximum 1 h at 90 °C.
It specifies also the test methods and requirements for verifying their characteristics, the marking and the presentation at delivery.
| SDO | BSI: British Standards Institution |
| Document Number | EN 14451 |
| Publication Date | July 6, 2020 |
| Language | en - English |
| Page Count | 26 |
| Revision Level | |
| Supercedes | |
| Committee | B/504 |