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HUBBELL ELECTRICAL PRODUCTS
INSTALLATION, OPERATION & MAINTENANCE DATA SHEET
KB1B/KB1D (NPT) and KBM20B/KBM20D (Metric) BREATHER & DRAIN SERIES.
CLASS I, GROUPS B,C,D, CLASS II, GROUPS E,F,G; CLASS III, HAZARDOUS (CLASSIFIED) LOCATIONS
For use in enclosures with maximum internal volume of 9,764 cubic in; (160,000 cubic cm)
Application: When used as a drain, it allows the discharge
NPT and Metric style threads.)
Preparation for Installation:
GO and NO-GO gauges for proper fit.
Ni plated Brass: BS
Installation and Maintenance:
A Division of HUBBELL INCORPORATE D (Delaware )
3940 Martin Luther King Drive
St. Louis, Missouri 63113 USA
For use in Explosive Atmospheres
IECEx: Ex d IIB+H2 Gb IP44 ATEX: Ex d IIC Gb IP44
SPECIAL CONDITIONS FOR SAFE USE
Do not use this product in explosive atmos pheres cont aining acetylene gas.
of accumulated water due to inter na l condens a tio n. As a
breather, it stabilizes the atmospheric pressure inside the
enclosure. (The series provide through-wall connections for
Caution: Before installing, make sure you are compliant
with area classifications, failure to do so may result in bodily
injury, death and property damage. Do not attempt
installation until you are familiar with the following
procedures. All installatio n must comply with the applicable
Electrical Code.
Make sure that the circuit is De-energized before starting
installation or maintenance.
Verify that the installation is grounded . Failur e to ground will
create electrical shock hazards, which can cause serious
injury and or death.
Important: Please read these instructions carefully
before installing or maintaining this equipment. Good
electrical practices should be followed at all times and this
data should be used as a guide only.
Before installing, apply some lubricant (such as Killark’s LUBG-6 thread lubricant) to
the threads. Install fitting in the proper threaded opening and wrench tighten. Inspect the breather/drain on a regular
schedule to ensure the drain is free of dirt and free-floating particle build up. Failure to do so could result in a clogged drain,
which may prevent water from exiting the enclosure. If a build up occurs, do not attempt to clean and re-use the unit. It
should be replaced. This will help prevent damage to the internal electrical equipment.
1.) For installation of 1/2-14 NPT, gauge the opening from
flush to 2 turn pass the notch.
1.) For installation of M20x1.5 6g, gauge the opening with
Operating Temperature:
KB series breather and drain operating temperature: (-50° to
+60°C).
Thread designation for Connections
Series Thru-wall connection
KB1BCEN 1/2-14 NPT
KB1DCEN 1/2-14 NPT
KBM20BCEN M20x1.5 6g
KBM20DCEN M20x1.5 6g
Material Suffix:
Aluminium: (blank)
Stainless 303: SS
Stainless 316: SS6
P/N KIL00921369 FORM NO. K1369 R7/17 ECO-8-037-17
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