Halcyon Streamline P-Valve, Installation Manual

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3
C
ongratulations on your purchase of the Halcyon P-Valve. You can be confi dent
that every effort has been made to ensure that it will function fl awlessly in
every diving condition. The Streamline design is the result of several years of
testing and refi nement; it is the culmination of a design process that draws inspi-
ration from thousands of dives by Halcyon staff, test divers, and explorers around
the world.
The Halcyon Streamline P-Valve is a bal-
anced system, machined from a solid piece
of Delrin®, with a threaded cap that pro-
trudes 5/8” (15 mm) from the surface of
the suit. The internal and external compo-
nents screw together and are united with
Aquaseal to ensure watertight reliability.
The external cap allows individuals to
vent out of the suit through a condom
catheter and fl exible tubing, or to easily
seal off the outside water by turning the
cap down to seal the captured o-ring,
preventing water from entering the suit.
The external cap can be left open during
the dive for immediate availability, or left
sealed and only opened prior to use.
The Halcyon P-Valve’s one-way check valve
is designed to prevent any water from entering the connection assembly and to
reduce the resistance of water pressure. The check valve, mounted in the Delrin
base, only allows fl uid to fl ow out of the suit, preventing water from entering the
connection assembly– even if condom attachment has failed. As a fi nal fail-safe,
should the check valve malfunction the exterior cap can be locked down to seal
off surrounding water. However, the need to seal the cap is unlikely since the
connection hardware AND the check valve must fail to allow water into the suit.
A second check valve in the Delrin base allows gas in the drysuit to equalize with
air in the connection/catheter assembly. This check valve eliminates the resis-
tance of water pressure while the diver expels, reducing the risk of a connection
failure. The balanced check valve assembly not only allows for greater redundancy
and ease of operation, but prevents ambient water from entering the connection/
catheter system. The elimination of ambient water in the connection system is
particularly benefi cial in cold water or questionable water sources. Additionally,
the low-pressure design increases the viability of the Streamline valve for use by
women when paired with an external female catheter.
Extreme exploration dives, such as
the 14-hour immersion in the Chip’s
Hole cave system, are made possi-
ble with the Streamline P-valve