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781E
781D
- Ex ta
781 | Breather / Drain Plug Available in brass, nickel plated brass, aluminium, stainless steel & nylon
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781 Breather Plug & Drain Plugs Breather Plug & Drain Plugs, Globally Approved, Explosive Atmosphere Cable / Conduit Accessory
• 781E for Ex e use
• 781D for Ex d use
• Drains equipment susceptible to moisture collection
• Enables equipment to breathe
• General purpose / industrial version available
• Nylon Ex e only version available (-20°C to +60°C)
• -60°C to 130°C (metallic versions)
• Globally marked, IECEx, ATEX & cCSAus
HOW TO ORDER A guide on how to order Breather Plug & Drain Plugs from CMP: e.g. 781 – D – M – 3 = Ex d – M25 e.g. 781 – E – M – 3 = Ex e – M25 Other Thread Variations are available on request. For further information on ordering please refer to how to order. The CMP 781E range of Increased Safety type ‘e’ breather plug / drain plugs have been tested together with CMP serrated washers to ensure that in areas that are subject to vibration, the breather plug / drain plugs do not suffer from self-loosening and in advertently fall out of the enclosure. Serrated washers are not included as standard but can be ordered separately.
| Design Specification | BS 6121:Part 1:1989, IEC 62444, EN 62444 |
| Enclosure Protection | IK10 to IEC 62262 (20 joules) Brass & Stainless Steel Only |
| ATEX Certificate | CML 18ATEX1330U |
| UKEX Certificate | CML 21UKEX1241U |
| Code of Protection | 781D: II 2G Ex db IIC Gb, II 1D Ex ta IIIC Da 781E: II 2G Ex eb IIC Gb, II 1D Ex ta IIIC Da |
| Compliance Standards | EN 60079-0,1,7,31 |
| IECEx Certificate | IECEx CML 18.0187U |
| Code of Protection | 781D: Ex db IIC Gb, Ex ta IIIC Da 781E: Ex eb IIC Gb, Ex ta IIIC Da |
| Compliance Standards | IEC 60079-0,1,7,31 |
| cCSAus Certificate | 1055233 |
| Code of Protection | 781D: Ex d IIC, Class I, Zone 1 AEx d IIC; Class I Div 1, Groups A,B,C,D IP66, Enclosure Type 4X 781E: Ex e II, Class I, Zone 1, AEx e II IP66, Enclosure Type 4X |
| Compliance Standards | CSA C22.2 No 0-10, 0.5, 30, 94; e 60079-0,1,7, E61241-1-1, UL50, 1203, UL60079-0,1,7 |
| UL Certificate | E253914 |
| Code of Protection | 781D: Class I, Zone 1 AEx d IIB; Zone 20 AEx ta IIIC 781E: Class I, Zone 1, AEx e IIC; |
| EAC Certificate (Formerly GOST R, K & B) | C-GB.A07.B.02492/20 |
| GOST R Certificate | /Certificates/Russia GOST R Industrial & Accessories.pdf |
| CCOE / PESO (India) Certificate | Ex d: P548696, Ex e: P533772 |
| INMETRO Certificate | TÜV 12.133OU |
| NEPSI Certificate | GYJ23.1109U |
| RETIE Approval | 03866 |
| KCS Certificate | 19_AV4BO-0254X 19_AV4BO-0255X |
| UkrSEPRO | CU 19.0370X |
| Marine Approvals | LRS: 01/00173 |
| Continuous Operating Temperature | 781D: -60°C to +130°C 781E: -60°C to +130°C (-20°C to +60°C Nylon) |
| Ingress Protection Rating ** | 781D: IP66 (when fitted with CMP sealing accessories) 781E: IP66 |
| Available Materials | Brass, Nickel Plated Brass, Aluminium, Stainless Steel, Nylon (781E only) |
| Accessories Included (781E only) | Integral Entry Thread equipment interface ‘O’ ring seal, Castellated Locknut |
| SANS | S-XPL21962 21.0304U |
| ECAS Certificate | 24-03-106290/E24-03-110155/NB0007 |
The 781D can be used with enclosures up to 30 litres for group IIB gases and enclosures up to 2.5 litres for group IIC gases
** When CMP installation accessories are used (781E). Refer to Maintaining a Seal for further information.
Certificates
Product Selection Table
Click here to view how to order
| Ordering Reference (781D) | Ordering Reference (781E) | Thread Size | Minimum Thread Length | Protrusion Length 'F' | Across Flats Dimension | Across Corners Dimensions | Max Installation Torque (Nm) |
| 781DM2 | 781EM2 | M20 x 1.5 | 0.59 | 0.50 | 1.18 | 1.30 | 7 |
| 781DM3 | 781EM3 | M25 x 1.5 | 0.59 | 0.50 | 1.42 | 1.56 | 10 |
| 781DT1 | 781ET1 | ½' NPT | 0.78 | 0.50 | 1.18 | 1.30 | 7 |
| 781DT2 | 781ET2 | ¾' NPT | 0.80 | 0.50 | 1.42 | 1.56 | 10 |
| Dimensions displayed in inches unless otherwise stated | |||||||
| Ordering Reference (781D) | Ordering Reference (781E) | Thread Size | Minimum Thread Length | Protrusion Length 'F' | Across Flats Dimension | Across Corners Dimensions | Max Installation Torque (Nm) |
| 781DM2 | 781EM2 | M20 x 1.5 | 15.0 | 12.7 | 30.0 | 33.0 | 7 |
| 781DM3 | 781EM3 | M25 x 1.5 | 15.0 | 12.7 | 36.0 | 39.6 | 10 |
| 781DT1 | 781ET1 | ½' NPT | 19.9 | 12.7 | 30.0 | 33.0 | 7 |
| 781DT2 | 781ET2 | ¾' NPT | 20.2 | 12.7 | 36.0 | 39.6 | 10 |
| Dimensions displayed in millimeters unless otherwise stated | |||||||
ATEX Insights
Comprehensive information on the use and application of the Directive ATEX 2014/34/EU, which became mandatory on 20th April 2016 can be obtained from the europa.eu web resources. The third edition of the ATEX 2014/34/EU guidelines were issued in December 2017 and form an important reference point for member states to follow; they can be found here : http://ec.europa.eu/DocsRoom/documents/41403/attachments/1/translations/
Read moreMetallic Cable Glands
CMP brass cable glands are produced using material grade CuZn39Pb3 (CW614N) to EN12168 and EN12164. Stainless steel cable glands are produced using material grade 316L to BS EN 10088 : Part 3 -, and aluminium alloy 6082 and 6262 to EN 573-3 - for aluminium cable glands.
Read moreVisit our Knowledge Base for technical expertise and advice, gathered over CMP's 60+ years' experience in the art of terminating cable glands.
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