Vented
Filler Caps
Rebling
Vented Filler Caps are designed for use on nickel-cadmium
battery cells. They provide for automatic venting
of gases within the cell while preventing leakage
of the electrolyte.
When installed on the battery
cell, the Vented Filler Cap O-ring is compressed,
sealing the filler cap-battery cell interface.
A rubber vent sleeve, expanded during assembly
to fit over the filler cap stem, seals the two
radial holes of the stem though which the internal
gases of the cell can escape. As pressure within
the cell increases, the rubber vent sleeve is
placed outwardly allowing the cells internal gases
to vent to the atmosphere. The rubber vent sleeves
are designed to open and close between a pressure
range of 2-10 psi.
The Vented Filler Caps are designed
with a bayonet-type locking mechanism and can
be easily installed or removed from the nickel-cadmium
cells using Rebling's Universal Vent Wrench (P/N
700260). They are molded from a polyamide
material which is resistant to attack from the
cells electrolyte. Both the O-ring and the vent
sleeve are made from ethylene propylene rubber,
which provides maximum chemical resistance as
well as performance stability over a wide range
temperature.
The Vented Filler Caps are available
in two sizes. The 700240 models are used on 10,20,
and 30 ampere-hour cells in batteries conforming
to MIL-B-81757/1. The 700240 unit is on the Qualified
Products List of MILB81757 and conforms to U.S.
Government Part No. M81757/2-1.
The 700250 caps are used on 6
ampere-hour type batteries conforming to MIL-B-81757/10.
These units conform to U.S. Government specifications
MS-3510-1, MIL-B-81757/10 and MS75046-1.
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