781 Series Breather/Drain Plugs

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Breather / Drain Plugs Type 781E with Increased Safety Exe type protection.

Breather / Drain Plugs Type 781D with Flameproof Exd type protection.

The CMP Type 781 Breather / Drain Plug is designed for Flameproof Ex d and Increased Safety Ex e apparatus that is susceptible to condensation or prone to moisture collection or ingress during normal operation. The Type 781 D or E is designed to act as both a drainage device, when mounted in a bottom entry of the equipment, and also to enable the inside air to breathe with the external environment under normal ambient and atmospheric conditions, whilst excluding further dust and moisture from penetrating the enclosure.

The Type 781E Breather / Drain Plug is supplied complete with an integral entry thread 'O' ring seal, and a castellated locknut to facilitate drainage from inside the enclosure.

The 781D must be installed into a threaded entry hole.

Metallic Breather / Drain Plugs are available in Brass, Nickel Plated Brass, Aluminium or Stainless Steel.

Available thread forms are shown in product selection table. NB. 781D is limited to enclosures of 2.5 litres for IIC gases and 30 litres for IIB gases.

781 Series Breather/Drain Plugs Table

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Ordering Reference (781D) Ordering Reference (781E) Thread Size Minimum Thread Length Protrusion Height Across Flats Dimension Across Corners Dimensions Installation Torque (Nm)
781DM2 781EM2 M20 x 1.5 15.0 17.0 30.0 33.0 7
781DM3 781EM3 M25 x 1.5 15.0 17.0 31.5 34.7 10
781DT1 781ET1 1/2" NPT 19.9 17.0 30.0 33.0 7
781DT2 781ET2 3/4" NPT 20.2 17.0 31.5 34.7 10
Dimensions are displayed in millimetres unless otherwise stated

NOTE: Marked with ATEX, IECEx and cCSAus certification details as standard. Please refer to Ordering Guide Tables for reference definitions, denoting material variants.

NOTE: Marked with ATEX, IECEx and cCSAus certification details as standard. Please refer to Ordering Guide Tables for reference definitions, denoting material variants.

TECHNICAL DATA
cCSAus Approval Certificate No. 1055233
cCSAus Code of Protection Category Ex e II, Class I, Zone 1, AEx e II; IP66; Enclosure Type 4X
cCSAus Compliance Standards C22.2 No. 0.5-M1982, C22.2 No. 30-M1986, C22.2 No. 94-M1991,CAN/CSA E60079-0:07, CAN/CSA E60079-1:07,CAN/CSA E60079-7:02, UL Standard 50, Eleventh Edition, UL Standard 1203, Fourth Edition, UL 60079-0, Fourth Edition, UL 60079-1, Fifth Edition, UL 60079-7, First Edition
GOST R Certificate Number POCC GB.HO06.B00207
GOST R Code of Protection Category Ex e II
GOST R Compliance Standards ГOCT P 52350.0-2005, ГOCT P 52350.1-2005,
ГOCT P 52350.7-2005, ГOCT MЭK 61241-1-1-99
GOST GGTN Permit PPC 00-40706
GOST K Certificate Number KZ 75000361 01 01 14761
RoK Permit For Use Number 19-02-UL-1957
Lloyds Approval No. 01/00172
DNV Approval No. E-10496
ABS Approval No. 01-LD234401C/1-PDA
INMETRO Approval Certificate Number. AEX-13104-U
INMETRO Code of Protection Category BR-Ex e II
INMETRO Compliance Standards ABNT NBR IEC 60079-0:2006, IEC 60079-1:2007 e IEC 60079-2007:2001
RETIE Approval Number 03866
Type 781D and 781E
ATEX Certification Detail SIRA 10 ATEX 1307U
ATEX Code of Protection Category 781D: ATEX Approved II 2 GD Exd IIC Gb, Ex ta IIIC DA
781E: ATEX Approved II 2 GD Exe IIC Gb, Ex ta IIIC DA
ATEX Compliance Standards EN 60079-0, EN 60079-1, EN 60079-7, EN 50281-1-1
IEC Ex Certification IECEx SIR 10.0149U
IEC Ex Code of Protection 781D: Ex d IIC Gb, Ex ta IIIC Da
781E: Ex e IIC Gb, Ex ta IIIC Da
IEC Ex Compliance Standards EN 60079-0, EN 60079-7, EN 60079-1, EN 60079-31, IEC 60079-0, IEC 60079-7, IEC 61241-1, IEC 60079-1, IEC 60079-31/td>
Continuous Operating Temperature 781D: -60° to +130°
781E (Metallic): -20° to +130°
781E (Nylon): -20° to +130°
Material Brass, Nickel Plated Brass, Aluminium, Stainless Steel
Accessories Included (781E only) Integral Entry Thread ‘O’ Ring Seal, Castellated Locknut

Accessories included - Integral Entry Thread "O" Ring Seal, Castellated Locknut

Additional information

CMP WP 781_0311