Earth Sheltered Homes Financing Construction Sales

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 pressurereturns to normal, the blast valve automatically returns to its normallyopen state. In other words, it lets air flow into your Safe Cell and out ofour 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.