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The IEP Technologies IsoFlap™ passive explosion isolation valve is a critical component in industrial safety systems. It is used to prevent the propagation of a potential explosion or fire within processes that manufacture, convey, or store flammable liquids, gases, powders, or granules.

Overview of the IEP Technologies IsoFlap™ Passive Isolation Valve

IEP Technologies’ passive isolation valves provide a cost-effective and dependable means of explosion isolation, helping reduce the risk of explosion propagation to primary production equipment. This isolation approach is both economical and effective: it self-activates and ensures isolation of an explosion propagating toward the inlets of protected equipment such as combustible dust processing equipment, dust collectors, cyclones, and other handling systems.

Available models include the IsoFlap™ and IsoFlap™-M. IsoFlap™ variants are third-party certified as protective systems under EU Directive 2014/34/EU (ATEX) and are approved for dust-explosion isolation. The IsoFlap™-M integrates monitoring of dust build-up inside the valve body and of the flap/blade position to meet the requirements of OSHA combustible dust guidance as well as NFPA 654 and NFPA 69.

Both IsoFlap™ and IsoFlap™-M feature durable carbon-steel bodies and high-quality alloy steel flaps/blades. The valves are designed to withstand the listed maximum reduced explosion pressure (Pred) in the specifications below. During normal operation, the flap is held open by process airflow; in the event of an explosion upstream, pressure drives the flap shut and locks it in place, minimizing flame and pressure propagation toward upstream equipment.

An optional IsoFlap-M Interface Module, a PCB-based monitoring system – is available for the IsoFlap-M version. The IsoFlap-M includes integrated sensors and display/controls, providing interlock functions to the plant’s main control panel.

Applications and Features of the IsoFlap™ Passive Isolation Valve

Typical Applications of the IEP IsoFlap™

Wherever a facility needs to prevent explosion propagation, IEP Technologies’ passive isolation valves are a strong fit. IEP’s technology ensures the IsoFlap range offers a highly cost-effective solution to reduce the risk of explosion spread to connected equipment.

Even systems fitted with explosion vents and flameless venting devices should incorporate an explosion isolation valve to reduce the risk of flame and pressure transmission between items of equipment and to help avoid a secondary explosion that could devastate a plant. Here, the IsoFlap provides dependable self-activating isolation at the inlet of protected equipment handling combustible materials.

Common installation points include the inlets of dust collectors, cyclones, small dryers, and other material handling vessels.

Key Features — IsoFlap™ Passive Isolation Valve (IFV Valve)

Passive design (no sensor-triggered actuation required)
Certified to EN 16447
IsoFlap-M version with dust-level sensing; compliant with NFPA 69
Low pressure drop
Short required installation distance
Tested and approved for installation with two elbows between the IsoFlap valve and the protected equipment
Easy inspection via a hinged cover with hydraulic strut
Tight, rigid construction
Round-body design
Corrosion-resistant design

Other Explosion Isolation Devices

High-Speed Isolation Valve — “Knife-Gate” Style

High-speed isolation valves provide solutions for critical explosion-isolation applications. They operate within milliseconds to create a mechanical barrier in the ducting/piping.

IsoDisc™ Passive Isolation Device

IEP Technologies’ IsoDisc™ passive isolation line offers a reliable, cost-effective solution to minimize the risk of explosion propagation toward upstream equipment or to the surrounding area via flame and pressure transmission. These self-activating passive solutions provide inlet isolation for protected enclosures that handle combustible dust—such as plant air intakes or clean-air ducts connected to explosion-protected dust collectors.

Ventex Passive Two-Way Explosion Isolation Valve

For equipment located outdoors or near exterior walls, explosion venting can be a viable protection method. However, to protect upstream equipment, it is essential that the protection strategy includes a means of reducing the upstream transmission of flame and burning material. This can be achieved with active isolation systems (chemical or mechanical) or with passive isolation valves. A passive explosion isolation valve is a self-activating device that provides a mechanical barrier to minimize propagation of flame and burning material to upstream equipment.

All IEP Technologies explosion-protection and explosion-propagation mitigation systems are highly effective at stopping dust explosions—from initial ignition through potential secondary events—across connected production equipment and areas. LVT Vietnam, together with IEP’s engineering expertise, supports customers in designing and installing explosion-propagation protection to complete your plant’s explosion safety system.

LVT Vietnam is proud to be the official distributor of IEP Technologies in Vietnam. We are ready to answer your questions and deliver the most optimized solutions for your needs.

Contact us today for consultation and installation!

LVT VIETNAM CO., LTD

Address: Cluster 3, Hong Van Commune, Ha Noi City, Vietnam.

Hanoi Office: No. 7, Lot L-4, Ba Da Area, Binh Vong, Thuong Tin Commune, Hanoi City
Da Nang Office: No. 33, Hoa Minh 22 Street, Hoa Khanh Ward, Da Nang City.
HCMC Office: A2.11.05 Green Sapphire Tower, 57 Thong Nhat Str. Dong Hoa Ward, HCMC.

Hotline: 024 3685 6633 – 0904 667 286

Email: lvtvietnam@gmail.com / thanh.le@lvtvietnam.com.vn

Website: https://lvtvietnam.com.vn/ or https://lvtvietnam.com/