BV-Series

Blast Valves, Gas-Tight Valves & Wall Sleeves

Self-actuating blast valves, gastight closing valves, overpressure relief valves, and integrated wall sleeves for civil defence shelters, military installations, and industrial facilities. Protect ventilation ducts and structural penetrations against blast overpressure and CBRN contamination.

Self-actuating CBRN-rated Custom diameters ATEX available
Blast Valve
Capabilities

Every Penetration. Protected.

Self
Actuating Closure
Blast valves close automatically upon detection of the overpressure wave — no external power, signal, or operator action required. Reopens automatically after the event.
CBRN
Gas-Tight Sealing
Gastight closing valves provide positive sealing against chemical, biological, radiological, and nuclear contamination. Suitable for protected shelters and command facilities.
Relief
Overpressure Valves
Pressure relief valves for shelter overpressure protection. Open at a calibrated set-point to vent excess pressure, protecting shelter occupants and structure.
Custom
Diameters
Available from 100mm to 1000mm+ diameter. Custom flanging, sleeve lengths, and installation configurations for new-build and retrofit applications.
Wall
Sleeve Systems
Integrated wall sleeves provide the structural penetration through blast walls and shelter roofs. Designed as a complete system with the valve for optimal performance.
ATEX
Hazardous Area
ATEX-rated variants available for oil and gas applications where the ventilation duct passes through explosive atmosphere zones.
Specifications

Technical Parameters

Valve TypesBlast valve, gastight closing valve, overpressure relief valve
ActuationSelf-actuating (no power required); manual override available
Diameter Range100mm to 1000mm+; custom on request
Overpressure RatingProject-specific; analysed per shelter design blast load
Sealing StandardGas-tight to relevant CBRN shelter standards
MaterialCarbon steel, stainless steel, or aluminium depending on application
Wall SleevesCustom length and flange configuration; supplied as a system
ATEX OptionZone 1 and Zone 2; 2014/34/EU compliant variants
InstallationNew-build and retrofit; installation guidance and support provided

Specify your valve and sleeve system.

Tell us your duct diameters, blast load, and shelter type. Our engineers will respond within 48 hours with product selection and sizing guidance.

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