Blast Valves & Airflow Control Devices

Blast dampers are used in ventilation systems to prevent the blast wave through external walls into the building. They are designed with high ventilation capacity. The dampers can protect people and equipment from explosions or momentary pressure change (e.g. tornadoes, etc.). When an explosion occurs, the valve will close instantly under the action of the shock wave; when the shock wave disappears, the valve will be automatically restored. They are mainly used in refineries, oil & gas, nuclear power plants and some other facilities which are at risk of explosions. They are installed on the air openings (air inlet and air outlet) of the facilities.

Brochure

BVNC overpressure valves – normally closed valves designed to maintain or control the differential pressure level in the shelter by releasing the air from the gastight shelter while offering providing protection from external blast wave pressure.

• BVNC overpressure valves were developed for use in civil defence shelters, bunkers, safe rooms and other protected spaces.​
• BVNC line of valves includes a wide range of valves for different airflows.
• BVNC are automatic action valves designed to protect from external blast wave pressure.
• BVNC designed for controlled release of air from the shelter when positive pressure (overpressure) rises to required level.
• The valves are extremely durable and can operate in a wide range of temperatures and resistant to corrosion.
• The valves are designed for installation on ventilation openings or as part of the duct.

Brochure

GK gastight valves are flow regulation valves designed for installation on the air ducts of ventilation systems of shelters and protective structures. The valves are commonly used as shut-off devices to stop or control the airflow and protect the inner space.

Advantages

• GK gastight shut-off valves have special design with double eccentric axle.
• GK valves can be delivered with manual and motorized drive.
• The valves are designed to hold a high static pressure loads and can be used in ventilation systems of shelters and protected facilities.
• The valves have a welded steel body or optionally can be made from stainless steel for very corrosive environments.
• The valve can be installed at any direction on the air duct.
• Minimal effort to operate the valve;
• When opening / closing, there is no friction of the sealing ring on the seat.
• Long service life of the sealing elements;
• Replacing the seal is a simple procedure that does not require special tools.
• Continuous sealing surface (360 degrees) provides the highest class of tightness.

Brochure

Wall sleeves are specially designed pipes with flanges which can be used to install valves or ducting to the walls. Arconik supplies variety of sleeves specially designed as per applications (internal walls/external walls) and approved as per different standards ranging from 4″ diameter to 32” diameter accommodating different thicknesses of walls. The wall sleeves are commonly installed at the early stage of rebaring and the concrete is casted on to make them a rigid and strong part of the wall.

Overview:
Wall Sleeves with Flange for cast-in-place concrete are available in 4″, 6″/8″, and 14″ sizes, using 4 to 12 bolts (M16 or M20) and designed for 300 mm+ wall thickness, with optional splinter plates. Retrofit Flanges are offered in 4″ and 8″ sizes for installation on existing walls, using 4 or 8 bolts. A chemical-resistant gasket is also available, compatible with 4- or 8-bolt flange configurations, to ensure a secure and watertight seal.