Earthlog Equity Group 4Survival ®
About 4Survival a Subsidiary of Earthlog Equity Group ®
Welcome to our web site Earthlog Equity Group 4Survival ®
and thank you for taking the time to learn more about our firm.
Since 1989, we at Earthlog Equity Group ® have been selling Earth
Sheltered Homes, Log Homes and Building materials.
Strong Pre-engineered
The Shelter Systems are constructed pre-engineered, providing you the
peace of mind of knowing that your shelter will protect you no matter
what.
The Shelter Systems uses a unique, patented technique to ensure that each
shelter can withstand a three-bar blast.
Innovative Construction using the following components :
Double-acting automatic 7 Bar Blast valve
Blast valves are mounted on the air intake and air outflow pipes inside a
bomb shelter. As a high pressure wave from a nearby detonation passes
over the shelter, the pressure travels down the pipes and into the shelter. If
this high pressure is not stopped, it will destroy the air filtration equipment
and injure or kill the occupants. Directly behind this high pressure wave is
a vacuum wave - all of the atmosphere is blown outward from the
epicenter of the detonation. This vacuum wave can be as deadly as the
pressure wave. That is why these valves are double acting - pressure and
vacuum.
The ARS-101-BV automatic double- acting blast valve automatically and
near instantly closes when the initial positive pressure wave from an
explosion hits and automatically closes a second time (in the other
direction) when the outside air pressure goes negative (a vacuum) in
relationship to the internal shelter pressure. When the outside air pressure
returns to normal, the blast valve automatically returns to its normally
open state. In other words, it lets air flow into your Safe Cell and out of
your exhaust port for normal operation, but will not allow a blast of
high-pressure air to enter your shelter - and bring contaminants with it.
This blast valve is designed and tested to protect an underground shelter
from a 100 pound per square inch detonation.
In order to withstand this pressure, these blast valves are fabricated from
ASTM grade A steel. This is a heavy, robust item designed to keep the
massive pressures of a nearby conventional or nuclear blast from injuring
or killing the occupants of your bomb shelter.
We have a new lock down feature that allows you to lock the valve in the
closed position. If you have a structural fire above your shelter or a
malicious person dumping water or smoke down your vent pipes, you can
remove the air intake hose or overpressure valve lock the valve shut. See
the manual for more information.
These valves are only necessary in hardened bomb shelters and should be
used in pairs - one on the air intake pipe and one on the air outflow pipe.
They install on the inside wall of an underground blast resistant shelter
right over the air intake and outflow ventilation pipes. Included are a
heavy duty 1/4" neoprene gasket, concrete wedge anchors, and a masonry
bit for the anchors.
The air intake blast valve has the air intake hose from the Safe Cell slipped
onto it, the air outflow blast valve has the overpressure valve slipped onto
it. The airflow is:
* Down the intake ventilation pipe
* Through the wall or ceiling
* Through the blast valve
* Through the air intake hose
* Through the NBC filter bank
* Out of the Safe Cell
* Throughout the shelter
* Through the overpressure valve
* Through the outflow blast valve
* Up through the outflow vent pipe
True ventilation requires air in and air out. You control where the air
enters and where it leaves - every bit of it being filtered by the Safe Cell.
Blast Resistant Ventilation Pipes
and thank you for taking the time to learn more about our firm.
Since 1989, we at Earthlog Equity Group ® have been selling Earth
Sheltered Homes, Log Homes and Building materials.
Strong Pre-engineered
The Shelter Systems are constructed pre-engineered, providing you the
peace of mind of knowing that your shelter will protect you no matter
what.
The Shelter Systems uses a unique, patented technique to ensure that each
shelter can withstand a three-bar blast.
Innovative Construction using the following components :
Double-acting automatic 7 Bar Blast valve
Blast valves are mounted on the air intake and air outflow pipes inside a
bomb shelter. As a high pressure wave from a nearby detonation passes
over the shelter, the pressure travels down the pipes and into the shelter. If
this high pressure is not stopped, it will destroy the air filtration equipment
and injure or kill the occupants. Directly behind this high pressure wave is
a vacuum wave - all of the atmosphere is blown outward from the
epicenter of the detonation. This vacuum wave can be as deadly as the
pressure wave. That is why these valves are double acting - pressure and
vacuum.
The ARS-101-BV automatic double- acting blast valve automatically and
near instantly closes when the initial positive pressure wave from an
explosion hits and automatically closes a second time (in the other
direction) when the outside air pressure goes negative (a vacuum) in
relationship to the internal shelter pressure. When the outside air pressure
returns to normal, the blast valve automatically returns to its normally
open state. In other words, it lets air flow into your Safe Cell and out of
your exhaust port for normal operation, but will not allow a blast of
high-pressure air to enter your shelter - and bring contaminants with it.
This blast valve is designed and tested to protect an underground shelter
from a 100 pound per square inch detonation.
In order to withstand this pressure, these blast valves are fabricated from
ASTM grade A steel. This is a heavy, robust item designed to keep the
massive pressures of a nearby conventional or nuclear blast from injuring
or killing the occupants of your bomb shelter.
We have a new lock down feature that allows you to lock the valve in the
closed position. If you have a structural fire above your shelter or a
malicious person dumping water or smoke down your vent pipes, you can
remove the air intake hose or overpressure valve lock the valve shut. See
the manual for more information.
These valves are only necessary in hardened bomb shelters and should be
used in pairs - one on the air intake pipe and one on the air outflow pipe.
They install on the inside wall of an underground blast resistant shelter
right over the air intake and outflow ventilation pipes. Included are a
heavy duty 1/4" neoprene gasket, concrete wedge anchors, and a masonry
bit for the anchors.
The air intake blast valve has the air intake hose from the Safe Cell slipped
onto it, the air outflow blast valve has the overpressure valve slipped onto
it. The airflow is:
* Down the intake ventilation pipe
* Through the wall or ceiling
* Through the blast valve
* Through the air intake hose
* Through the NBC filter bank
* Out of the Safe Cell
* Throughout the shelter
* Through the overpressure valve
* Through the outflow blast valve
* Up through the outflow vent pipe
True ventilation requires air in and air out. You control where the air
enters and where it leaves - every bit of it being filtered by the Safe Cell.
Blast Resistant Ventilation Pipes
