What is BS EN 13433 about?
BS EN 13433 discusses about Devices to prevent pollution by backflow of potable water. BS EN 1343 specifies the dimensional, physical-chemical, design, hydraulic, mechanical, and acoustic characteristics of mechanical disconnectors, direct actuated Family G, Type A.
BS EN 13433 is intended to prevent the return of water having lost its original sanitary and drinking qualities (called “polluted water” in BS EN 13433), into the potable water distribution system whenever the pressure of the latter is temporarily lower than in the polluted circuit.
Note 1: BS EN 13433 covers the mechanical disconnectors of PN 10 that are capable of working without modification or adjustment:
- At any pressure up to 1,0 MPa (10 bar)
- With any pressure variation up to 1,0 MPa (10 bar)
- In permanent duty at a limit temperature of 65 °C and 90 °C for 1 h maximum
Note 2:BS EN 13433 specifies also the test methods and requirements for verifying these characteristics, the marking, and the presentation at delivery.
Who is BS EN 13433 for?
BS EN 13433 on mechanical disconnector is beneficial for:
- Electrical engineers and mechanical engineers
- Electricians and people working in the electrical department
- Mechanics
Why should you use BS EN 13433?
In respect of potential adverse effects on the quality of water intended for human consumption caused by the product is covered by BS EN 13433.
BS EN 13433 is applicable to mechanical disconnectors in nominal sizes DN 8 up to DN 250.
BS EN 13433 assists the user with the surface of the body. The outside and inside surfaces of the device may or may not contain a coating. The coating for protection of the basic material against corrosion can be either realized by epoxy coating or by polyamide powder-based coating. The internal components of the device are accessible for inspection, repair, or replacement. By design, the components are to be refitted at their initial place, without ambiguity.
Overall, BS EN 13433 is helpful as it provides details on mechanical disconnectors that can help you out in your business. The device comprises one pressure tapping and a visible indication on the device when the obturator is in the drain position. The pressure tapping is located on the inlet of the device.