Blast valves, overpressure valves, and gas tight valves
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Blast valves are devices that mount over the air intake and air outflow pipes in a shelter. They automatically close when a high pressure wave and then the subsequent vacuum wave from a nearby detonation hits your shelter. Without blast valve protection, high pressure air will be forced through the air intake and outflow pipes into your shelter - damaging equipment, injuring or killing occupants, and delivering airborne toxins into your protected space.

Overpressure valves work with the air filter to create and maintain overpressure in your shelter. The A 803 overpressure blast valve integrates both the blast and overpressure valve in one unit.

Gas tight valves allow you to completely isolate your shelter from the outside air.

 

 

Blast Valves



Blast valve
Part number: E 1210
Pressure rating: 42 PSI incidence/154 PSI reflective
Airflow: 295 - 2,000 CMH
Price: please call for pricing

Notes:

Heavy duty blast valve with high pressure rating and airflow. Installation is recommended with 8 inch wall sleeve - see below.


Wall sleeve
Part number: Wall sleeve
Diameter: ~8 inches OD (219 mm)
Airflow: 295 - 2,000 CMH
Price: please call for pricing

Notes:

These sleeves are poured in place in a concrete wall to anchor the blast valves that are mounted to the flange after the wall has cured.


High temperature
Blast valve
Part number: RV 50
Pressure rating: 560 PSI
Price: please call for pricing

Notes:

Designed to be installed in a 2 inch (~50mm) exhaust pipe of an engine or generator. All stainless steel construction with a temperature rating in excess of 750 F (~400 Celsius).


High temperature
Blast valve
Part number: RV 100
Pressure rating: 560 PSI
Price: please call for pricing

Notes:

Designed to be installed in a 4 inch (~100mm) exhaust pipe of an engine or generator. All stainless steel construction with a temperature rating in excess of 750 F (~400 Celsius).


Overpressure
blast valve
Part number: A 803
Pressure rating: 42 PSI incidence/154 PSI reflective
Airflow: 200 - 800 CMH
Price: please call for pricing

Notes:

Heavy duty blast valve with high pressure rating and airflow. Installation is recommended with 8 inch wall sleeve - see below.
 
 

 

Overpressure Valve



Overpressure valve
Part number: Z 500 D
Pressure rating: not rated for blast protection
Airflow: 0 - 1,000 CMH
Price: please call for pricing

Notes:

This valve will regulate the outflow of air from your protected space. It also acts as a check valve - not letting air in.

 
 

 

Gas Tight Valves



Gas tight valves
Part number: PPV 80 I - PPV 400 I
Pressure rating: 560 PSI
Price: please call for pricing

Notes:

Designed to be installed in a 2 inch (~50mm) exhaust pipe of an engine or generator. All stainless steel construction with a temperature rating in excess of 750 F (~400 Celsius).

 

When large amounts of air have to be moved through a shelter, it is common to install an array of blast valves:

 

 

 

 

Products
 

NBC filters

 

Blast, overpressure, and gas tight valves

 

HVAC filters

 
 
  Contact
   
 

 

American Safe Room
Oakland, OR 97462

Tel: 541-459-1806
FAX: 503-212-6695
E-mail:
Sales@AmericanSafeRoom.com

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