The ISC BOV

Complete Description:

The BOV is a combination ISC Dive Surface Valve (DSV) and open circuit second stage and with a  simple single move by the diver it will deliver emergency breathing media to a diver in distress and minimizing increased breathing work load and maximizing CO2 wash out. The BOV is machined from copolymer acetyl to exacting tolerances to insure fit and performance.  Pending CE Approval.

 Features:

• Smallest size in industry
• Right hand Adjustable dial-a-breath to tune in water breathing performance
• Left hand breathing gas feed to primary bailout cylinder
• Low weight and low drag minimizing diver jaw fatigue
• Tested for low work of breathing by the HSE and KM/Dive Lab
• Uses ISC proprietary breathing loop check valves for low CCR WOB

Options:

• Stand alone BOV
• BOV with breathing hoses. (Part# BH-breathing loop BOV Assy; $1499.00 USD)
• BOV with breathing hoses integrated with Megalodon or Pathfinder. (Part # BH-breathing loop BOV-ASSY; $569.00 USD)

Recommended  component:

• BOV hose kit (Part #BOV-Feed hoses/adapters-Assy). ($350.00 USD). This assembly supply’s the diver bailout gas and has two QC6 snap connectors and does not impede gas flow performance to the BOV or bailout second stage like other connectors do.

Assembly consists of:

• 48”/121.92cm long USA made gas feed hose. (part # ACC-hose LP BOV to QC6 48 inch).
• 33”/83.82cm long USA made gas supply hose. (ACC-Hose LP ADV knurled).
• QC-6 quick disconnect female and male, (Part # CON-SS-QC6 body FPT and CON-SS-QC6-deso stem). Designed for high breathing gas flow and not impeding breathing performance.
• Stainless adapter (CON-SS-adapt male FPT NPT/UNC-MP.

Testing:

BOV attached to 600ft/272m divers umbilical with 150Psia OB.  Gas: Air, Depth 254fsw/77msw, Temp: 32°F/0°C, 37.7RMV/15.06L bpm/2.50L TV. WOB: 1.28 Joule. Test #2 BOV attached to 600ft/272m divers umbilical with 150Psia OB.  Gas: Air, Depth 254fsw/77msw, Temp: 32°F/0°C, 50.0 RMV/20.0L bpm/2.50L TV. WOB: 1.87 Joule. Test #3 BOV attached to 600ft/272m divers umbilical with 150Psia OB.  Gas: Air, Depth 221fsw/67.6msw, Temp: 32°F/0°C, 62.7 RMV/25.09L bpm/2.50L TV. WOB: 2.41 Joule.

Special safety notes:

• Do not connect BOV to CCR onboard gas 21cuft/3liter or less.
• Do not use LP hose connectors that impede breathing gas flow from bailout cylinders or O/C gas supply source.
• Insure you know what breathing gases the BOV is connected to, and the minimum and maximum depths (MOD) you can breath those gases.
• Do not mistakenly breath on the BOV instead on the CCR closed breathing loop especially with hypoxic mixes at the surface or above minimum operating depth.
• Test BOV at bubble stop (20fsw/6msw) before final decent to insure operation.
• Do not use BOV if minimum-operating depth (MOD) of hypoxic breathing gas is shallower than bubble stop.
• Label all breathing gas LP hose connections with gas % and MOD.
• Label all cylinders on the side and bottom with gas MOD.
• Analyze all cylinders and label with initials of person who analyzed, the date and the gas contents with Oxygen % being first then HE if appropriate.
• Insure your bailout has a redundant second stage with a long hose (7ft/2 meter) (Part # ACC-Hose MC90 LP 7’($45.00) for another diver to breath on. Never violate gas-sharing principles.
• Rescue procedure for CCR diver with BOV: Shake diver to check if unconscious. Get behind diver and reach down over unconscious divers head and carefully hold BOV in the divers mouth and purge regulator of water and watch for bubbles.  After clearing the regulator pull DSV lever down all the way to the plastic stop and transitioning the unconscious diver to the bailout supply gas.  Watch for unconscious divers breathing on the BOV by bubbles escaping the exhaust valve and ascend with the diver in a head up position and maintaining your decompression profile. Once you have established contact with the unconscious diver DO NOT LET GO unless you are at risk of drowning. If the diver does not show signs of breathing, gently add breathing gas through the purge valve and watch for escaping bubbles from the exhaust valve, you are hopefully exchanging breathable gas for the non-breathing diver.  DO NOT GIVE UP!