PURPOSE AND SCOPE OF APPLICATION
VKU explosion-proof breather plugs are applied in explosion-proof equipment when it is necessary to enable release of gases and release of excess pressure of gases in storage batteries. VKU explosion-proof breather plugs are also applied for correction of atmospheric pressure fluctuations. The device shall be installed in the upper part of the enclosure only.
Scope of application – outdoor and indoor hazardous areas as per explosion protection marking, GOST 30852.13-2002 (IEC 60079-14:1996), dangerous production facilities of I, II, III, IV hazard class supervised by Rostechnadzor of the RF and national technical supervision bodies of the Customs Union and CIS countries.
Marking:
1Ex db IIB Gb 1Ex db IIC Gb Ex tb IIIC Db Ex db IIB Gb U Ex db IIC Gb U Ex tb IIIC Db U РВ Ex db I Mb Ex db I Mb U 
| Type of device | Type of thread | H, mm | S, mm | AC, mm | D, mm | |
| Metric | Taper | |||||
| VKU01 | М16Х1,5 | 3/8" | 51 | 19 | 17 | 36 |
| VKU | X | Х | – TU 3400-007-72453807-07 | ||
| Type of device | |||||
| Thread size: 01 | |||||
| Type of thread: Taper inch NPT - N; Metric GOST 24705 - M; Taper pipe GOST 6211-81 - R; Pipe cylindrical GOST 6357-81 - G |
Example: VKU01N-TU 3400-007-72453807-07
