The TRANBERG® TEF 731 drain plug lets the inside of a junction box or enclosure breathe with the outside atmosphere and drains any moisture that collects inside, while maintaining the Ex protection and IP66 rating. Certified Ex eb for gas zones 1 and 2 and Ex tb for dust zones 21 and 22, in brass. Re-usable, with a red silicone O-ring. Developed and manufactured at our own factory.
Application
- Breather to prevent condensation inside junction boxes and enclosures, and drain for water
- Outdoor or indoor
- Hazardous areas: Zone 1, Zone 2 and safe area, and dust zones 21 and 22
Features and benefits
- Prevents condensation and drains water whilst maintaining the protection level
- Certified with dust protection
- Re-usable, durable materials
- Available in brass and stainless steel AISI 316 (EN 1.4401)
Technical data (TPS7151)
| Material | Brass |
|---|---|
| O-ring | Silicone Shore A 70, red |
| Entry thread | M25 × 1.5, entry length 9 or 15 mm |
| Ingress protection | IP66 |
| Ambient temperature | −60 °C to +130 °C |
| Ex protection | II 2 G Ex eb IIC Gb; II 2 D Ex tb IIIC Db |
Approvals and certificates
- ATEX: DNV 21 ATEX 03413
- IECEx: IECEx DNV 21.0089
- Directive 2014/34/EU, IEC 60079-0, IEC 60079-7, IEC 60079-31
Choose the entry length to match the wall thickness of the enclosure, and add the matching lock nut. Also available in stainless steel AISI 316.







