Product Finder

Product Finder

Our Product Finder tool allows you to find the perfect product for your requirements.

781 | Breather / Drain Plug Available in brass, nickel plated brass, aluminium, stainless steel & nylon

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 SpecificationBS 6121:Part 1:1989, IEC 62444, EN 62444
Enclosure ProtectionIK10 to IEC 62262 (20 joules) Brass & Stainless Steel Only
ATEX CertificateSIRA 10 ATEX 1307U
Code of Protection781D: II 2G Ex d IIC Gb, II 1D Ex ta IIIC Da
781E: II 2G Ex e IIC Gb, II 1D Ex ta IIIC Da
Compliance StandardsEN 60079-0,1,7,31
IECEx CertificateIECEx SIR 10.0149U
Code of Protection781D: Ex d IIC Gb, Ex ta IIIC Da
781E: Ex e IIC Gb, Ex ta IIIC Da
Compliance StandardsIEC 60079-0,1,7,31
cCSAus Certificate1055233
Code of Protection781D: 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 StandardsCSA C22.2 No 0-10, 0.5, 30, 94; e 60079-0,1,7, E61241-1-1, UL50, 1203, UL60079-0,1,7
UL CertificateE253914
Code of Protection781D: 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)TC RU C-GB.AA87.B.00487
GOST R CertificatePOCC.GB.35.H00102
CCOE / PESO (India) CertificateP333688
INMETRO CertificateTÜV 12.133OU
NEPSI CertificateGYJ18.1248U
RETIE Approval03866
Marine Approvals LRS: 01/00173
Continuous Operating Temperature781D: -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 MaterialsBrass, Nickel Plated Brass, Aluminium, Stainless Steel, Nylon (781E only)
Accessories Included (781E only)Integral Entry Thread equipment interface ‘O’ ring seal, Castellated Locknut

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

Click here to view Certificates

Product Selection Table

Click here to view Technical Illustration

Technical Illustration

Click here to view how to order

Ordering Reference
(781D)
Ordering Reference
(781E)
Thread SizeMinimum Thread LengthProtrusion Length “F”Across Flats DimensionAcross Corners DimensionsMax Installation Torque (Nm)
781DM2781EM2M20 x 1.50.590.501.181.307
781DM3781EM3M25 x 1.50.590.501.421.5610
781DT1781ET1½” NPT0.780.501.181.307
781DT2781ET2¾” NPT0.800.501.421.5610
Dimensions displayed in inches unless otherwise stated
Ordering Reference
(781D)
Ordering Reference
(781E)
Thread SizeMinimum Thread LengthProtrusion Length “F”Across Flats DimensionAcross Corners DimensionsMax Installation Torque (Nm)
781DM2781EM2M20 x 1.515.012.730.033.07
781DM3781EM3M25 x 1.515.012.736.039.610
781DT1781ET1½” NPT19.912.730.033.07
781DT2781ET2¾” NPT20.212.736.039.610
Dimensions displayed in millimeters unless otherwise stated