Active Explosion Isolation

Active Explosion Isolation

Active isolation systems (as opposed to active isolation valves) require the use of an explosion detector and control panel, and are comprised of either or both chemical and mechanical isolation solutions.

Chemical isolation uses an explosion suppressant discharged into the duct work between interconnected vessels to suppress the propagating flame front before it has the opportunity to travel and achieve an enhanced explosion.

Mechanical isolation involves triggering a high-speed valve to form a mechanical barrier in the pipeline. This barrier can protect against flame as well as pressure propagation into connected vessels.

IEP Technologies Active System Components

Whether the best explosion protection solution is suppression, venting or isolation, IEP Technologies offers the right products to meet your needs. Our system components undergo rigorous third-party testing to receive the approvals required by, for example, ATEX and NFPA. As each explosion protection threat is unique, we offer different types of explosion detectors, controls and suppressors to tailor the protection to each individual application.

IEP Technologies  – Control Unit

· Single-Zone – EX-100.1, EX-200
· Multi-Zone – EX-8000

A control unit is microprocessor-based and has both control and verification functions. It is comprised of control and battery charging circuits, a power supply and front panel which includes control and indication functions visible through a scratch-resistant window. A unit is packaged in an enclosure to provide superior dust contamination and weather resistance. Terminal access has been carefully designed for ease of installation.
Any signals emerging from the explosion pressure or flame sensors are recorded, tested and evaluated by the control unit. The monitoring and activation lines are continuously checked for wire breakage, earth fault and short circuit. Additionally, an automatic self-test system ensures that all important functions of the control unit are checked electronically. These control units provide both trouble relay contacts for process interlocking, and alarm relay contacts for notification should a system actuation occur.

Click below to download Single Zone Control Unit Catalogue

Click below to download Multi Zone Control Unit Catalogue

IEP Technologies  – MEX Detector and FAB Unit

Dynamic measuring cells in the detector sense changes in pressure. Once pre-programmed pressure values have been exceeded the detector reacts within microseconds to raise an alarm. The MEX Detector has up to two ceramic sensors within a single, solid housing. This is the only detector with algorithmic-based output and decision-making logic based on full-scale explosion tests, expert knowledge and application experience. The output and decision logic provides the highest detection security by evaluating the difference between an explosion pressure rise and process pressure variations. The ceramic cell sensors make the detector more resistant against mechanical damage and corrosive dusts, gases and liquids. By means of a field terminal box (“FAB”) the MEX Detector can be connected to various control units.

Competitive advantages of the MEX Detector include:
· Dynamic pressure detection based on the characteristic temporal profile of pressure increase associated with confined explosion occurrences. This significantly increases false alarm immunity as well as detection security.
· Comprises two pressure-sensing cells to increase detection security and redundancy.
· Field-programmable unit to accommodate a wide range of hazard and process conditions. Also features a history buffer for programming set point during commissioning as well as diagnosis of incident after actuation.

Click below to download MEX Detector & FAB Unit Catalogue

IEP Technologies  – Infrared and Ultraviolet Infrared Detectors

· IR-13 Infrared Flame and Spark Detector
· UV/IR Flame Detector

Optical detectors include infrared (“IR”) and ultraviolet infrared (“UV-IR”) detectors which are integrated in explosion prevention systems for specific applications. The IR detector is typically used in interconnected duct work for dust-handling systems. The UV-IR detector is used in combustible gas or vapor protection systems such as aerosol fill rooms and chemical storage rooms.

Click below to download Infrared Flame and Spark Detector Catalogue

Click below to download UV/IR Flame Detector Catalogue

IEP Technologies  – Static Explosion Pressure Detector

The IEP Technologies Static Explosion Pressure Detector is a low inertia detector incorporating a highly sensitive stainless steel diaphragm. The diaphragm is mounted onto a 6-inch diameter eight (8) hole nickel plated steel mounting flange. The flange is bolted to a cast aluminum housing protected by epoxy paint. The screw cover to the housing has an o-ring seal to protect the field adjustable switch assembly housed within. As standard, the pressure detector comes with a 24-inch long braided cable assembly. A standoff mounting kit is also available. The mounting kit consists of a stainless steel standoff pipe, a detector mounting bracket, a hose assembly, hose clamps, gaskets, and an adaptor plate.

Click below to download the Static Explosion Pressure Detector catalogue

IEP Technologies Chemical Isolation

IEP Technologies  – Protractor Operated HRD (PHRD) Chemical Suppressor

These suppressors are used for explosion suppression of gases, solvent vapours and combustible dusts. The suppressors deliver high rates of suppressant that quench an explosion flame in its early stages, thus preventing a pressure rise from reaching dangerous proportions.

A cylindrical alloy steel container filled with 3kg, 4kg or 16kg of powder suppressant and pressurised to 60 bar (880 psi) with dry nitrogen. Inside the flange is a hinged flap supported by a beam which is kept closed by a latch. Two piston, non-explosive protractor operated actuators are used to initiate opening. When the actuators are activated by means of an electrical impulse from the associated control unit, pistons move the latch, which allows the flap to open and provide a clean , unrestricted opening. The nitrogen then expels the suppressant at high rate through the spreader assembly into the protected volume.

Click below to download the Protractor Operated HRD (PHRD) Suppressor catalogue

IEP Technologies Mechanical Isolation

IEP Technologies  – High Speed Isolation Valve

An High-Speed Isolation Valve provides a solution for vital explosion isolation applications. It operates in milliseconds to provide a mechanical barrier within a pipeline. The High-Speed Isolation Valve has a stainless-steel body incorporating a full ported stainless-steel valve gate. The valve is designed to withstand a 150 Psi pressure wave from a deflagration without deformation. Closure is achieved in milliseconds by rapidly discharging nitrogen into a piston actuator. The nitrogen is supplied by an IEP Technologies High-Rate Discharge Bottle. Detection is typically provided by an IEP Technologies explosion pressure detector. The detector is monitored by an IEP Technologies control unit which provides supervision, alarm, system actuation and process shutdown. Typical applications for the valve include explosion isolation on dust collectors, mills, fans, vapor recovery lines, dryers, and other interconnected process equipment.

Click below to download the High Speed Isolation Valve catalogue

Rico Active Isolation Valves

Rico’s VENTEX ESI are explosion isolation systems after EN15089:2009D. Explosion isolation with VENTEX valves is used in systems in which combustible dusts, gases or hybrid mixes are processed.

The RICO Slide Valve RSV provides reliable protection from explosions in a pipeline system. Available in different versions, these valves are suitable for use both in pharmaceutical media and for systems that process dust and gas.


The Rico VENTEX ESI-P active explosion protection valve is operated with external energy and, thanks to its specific functionality, also provides effective protection against fire.

– P: single-acting with external energy/active
– For gas, dust and hybrid mixtures
– Closing via gas generator activeated by a system monitoring
– Additionally prevents fires spreading
– Coaxial design
– Low pressure loss
– Short installation distance
– Rapid closing speed
– Minimum downtime after an explosion
– Sizes DN100 to DN500 (other sizes available as special versions)
– No soiling caused by the closing valve
– Utilisation as a shut-off valve possible


Rico – Slide Valves RSV

In the event of an explosion not only installations are at risk, but also people and the environment. Flames, radiated heat, pressure waves or flying debris can cause considerable damages and costs to companies. Rico Sicherheitstechnik AG has developed an efficient explosion isolation slide valve
which, with an external power supply, successfully prevents the spread of explosions in pipes. The Rico slide valve is designed to be used in dust conveying pipes where pressure losses and obstacles are not desired.

Application areas:
The Rico Slide Valve is used in installations processing
explosive dusts, gases or hybrid mixtures:
– Pharmaceutical industry
– Cosmetics industry
– Chemical/Petrochemical industry
– Research laboratories
– Silos, mills, drying chambers and separators
– Extraction systems, etc.


The protected system is fitted with pressure and /or flame sensors. These detect an explosion and transmit a signal. Depending on the size of the Slide Valve, the signal activates one or more gas generators, which close the Slide Valve by means of the pressure generated. When closed, this effectively prevents the spread of flames and pressure waves. Fast closing times also allow short installation distances. The valve can be opened and closed pneumatically in normal operation.

Click below to download the Rico RSV Valve Catalogue

Rico – Slide Valve RSV-D

RICO RSV-D Slide Valves provide protection against the spread of explosions in dust transport systems.
RSV-D provides protection in both directions.

– D: Dust, double acting
– for installations with dust transport
– maximum explosion pressure up to 30 bar.abs (≥ DN100)
– maximum explosion pressure up to 50 bar.abs (≥ DN80)
– rapid closing speeds
– short installation distance
– simple maintenance
– minimum downtimes due to rapid recommissioning after an explosion
– sizes DN50 to DN400 (other sizes available as special versions)

Rico – Slide Valve RSV-G

The RICO RSV-G Slide Valve provides effective protection from explosions in gas systems.

– G: Gas, double acting
– for installations with dust, gas or mixture conveying
– maximum explosion pressure up to 30 bar.abs (≥ DN100)
– maximum explosion pressure up to 50 bar.abs (≥ DN80)
– rapid closing speed
– short installation distance
– simple maintenance
– minimum downtimes due to rapid recommissioning after an explosion
– sizes DN50 to DN400 (other sizes available as special versions)
– optimum cleaning in the product contact area (cip)

Rico – Slide Valve RSV-P

The RICO RSV-P Slide Valve provides explosion protection in both directions. Its special pharmaceutical-grade housing allows for optimum cleaning at the point of contact with product, both inside and outside.

/ P: Pharmaceuticals, double acting
/ for installations with dust, gas or mixture conveying
/ maximum explosions pressure up to 30 bar.abs (≥ DN100)
/ maximum explosions pressure up to 50 bar.abs (≥ DN80)
/ rapid closing speeds
/ short installation distance
/ simple maintenance
/ minimum downtimes due to rapid recommissioning after an explosion
/ Sizes DN100 to DN600 (other sizes available as special versions)
/ optimum cleaning in product contact area (cip)
/ special pharmaceutical housing offers optimum cleaning of outer product contact surfaces (wip)

Rico – REDEX Slide

Do you need to protect a process with a high dust load and low explosion pressure? The explosion isolation slide valve, REDEX Slide, is the perfect solution thanks to its simple technical structure accompanied by attractive prices and low maintenance costs.

Key data:
– for dust explosions, double acting
– for applications where explosion venting or suppression is used
– max. explosion pressure up to 2.5 bar.abs
– shortest closing times
– shortest installation distances
– easy maintenance
– minimal process breakdown due to fast recommissioning
– size DN80 to DN150
– suitable for indoor as well as outdoor installation


The protected system is fitted with pressure and/or flame sensors. These detect an explosion and transmit a signal. The signal activates a gas generator, which closes the slide valve through the generated pressure. The spread of flames and pressure waves is therefore effectively prevented. The extremely fast closing time enables very short installation distances. In normal operation, the slide valve can be opened and closed pneumatically.

Click below to download the Rico REDEX Slide Installation Instructions