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18
Freedivers Recovery Vest Mark II-S
copyright Oceanic Safety Systems LLC., 2015
RED LED
E. Overpressure Valve (OPV)/Dump
Valve
The OPV’s primary function is to relieve
excess air pressure inside the bladder.
The OPV can also be opened manually
by pulling on the ball-and-cord assembly
to quickly dump air, which might be re-
quired if you are exiting a confined space
and when you want to repack and rearm
the FRV. Do not tamper with this valve.
The valve spring continually presses
against the rubber gasket, which presses
against the plastic valve seat. It is possi-
ble for the plastic and rubber to stick so
tightly the resulting internal pressure upon inflation exceeds the burst strength of the bladder material.
You must lubricate the valve seat at a minimum of every three months. Pull the valve spring to unseat
the gasket and spray rubber-safe silicone spray into the valve. Open and close the valve several times
to work the lubricant thoroughly through the valve. Two suitable silicone sprays are
3-In-One Silicone
Spray
and
M Essentials Silicone spray.
Always pull your over-pressure valve cord to test its function as part of your pre-dive inspection.
Note
Avoid opening the OPV in the water while testing your FRV because this will
allow water to enter the bladder, which will later require cleaning by rinsing with fresh
water at the end of the day.
F. Oral inflation hose
You may inflate your FRV orally with the oral inflation hose found packed with the bladder near
your biceps area of your right lapel. To operate this valve, unsnap the lapel cover, then unscrew the
retainer to allow full depression of the valve, then depress the end and blow. When not in use, the
valve retainer should be screwed closed to prevent accidental opening of the valve.
Note
While rinsing the FRV at the end of the day, be sure to screw the retainer in and out
to keep it functioning smoothly and to prevent it from corrosion or excess salt build up.
ORAL INFLATION TUBE
OPEN
CLOSED
SPACE
SPACE
CLOSED
GREEN LED
Warnings
The proper function of the OPV is vital to prevent damage to the inflation
bladder. Do not tamper with this valve and test it monthly by inflating the vest and
checking for retention and release of gas. Return a malfunctioning FRV to OSS.
Unauthorized service or tampering may render these valves inoperable, and could cause
the bladder to leak or burst. This type of damage is not repairable.
OVER PRESSURE VALVE (OPV) AND PULL
CORD
