Vent-Saf® Explosion Vents
An explosion can result from an ignition of a combustible gas, mist or dust when mixed with air during processing, handling or storage operations. A rapid rise in pressure occurs in the containing structure, and if it is not of adequate strength to withstand the deflagration pressure, extensive damage and injury to personnel can occur.
Explosion vents are low burst pressure membranes of calculated area fixed over an opening on the structure to be protected. In the event of a deflagration the vents provide a rapid and unrestricted opening at a predetermined burst pressure (Pstat) allowing combustion gases to expand and flow through the open vent. The required relief area necessary to protect plant or equipment may be determined by using the most current standards of NFPA 68 or VDI 3673.
The most suitable explosion vent may be selected by matching the information in this catalog with the particular operating conditions.
The Vent-Saf® explosion vents can protect industrial equipment including silos, dust collectors, cyclones, conveyers, dryers…and many more.
The Vent-Saf® Product Line
Types VSP™ (Vent-Saf Plus )
and VSS™ (Vent-Saf Sanitary)
domed single section metal explosion vents with integral gaskets. The dome is formed to resist vacuum.
Type VSE™ (Vent-Saf Economy)
a flat, single section metal explosion vent with integral gaskets.
Type EXP/DV™ a round domed explosion vent
of composite construction with integral gaskets. The EXP/DV vent has a laser cut stitch pattern in the dome area. A Teflon® liner covers the slits providing a seal. The vent burst pressure is controlled by the arrangement of the stitch pattern.
The Vent-Saf vents are available in both round or rectangular styles designed to be mounted on the structure to be protected using a Safety Frame.
BS&B Type IPD explosion suppression systems use a lightweight modular design to deliver extinguishing agents into a rapidly developing fire to suppress it before reaching destructive proportions. A typical system consists of a Unitized Sensor, a Power Supply Module, a System Monitor and several Explosion Suppression "Cannons."
The Explosion Suppression Cannon module propels the extinguishing agent into the developing fireball of an explosion. Because the developing explosion has a head start on the actuation of the suppression system, the system must be rapidly actuated. Dynamic activation breaks up any compaction of dry chemical extinguishing agents, and releases stored pressure to deliver the agent at a very rapid rate. The function of the agent is to extract heat from the developing fireball. The amount of heat generated is a function of the size of the fireball, and the size grows rapidly with time. Thisrequires that the Suppression System must react very quickly.
Process pressure is monitored by the Unitized Sensor module which contains three individual sensors and electronic logic to trigger Cannon modules. If two of three sensors indicate that a sufficient pressure rise of an explosive nature has occurred, the logic circuit delivers an activation signal to the Cannons. The individual sensors are programmed to actuate the system based on a pre-determined pressure rise typical of an explosion, as opposed to gradual process pressure increases. The Unitized Sensors can be configured to allow for operation of the process at vacuum.
The System Monitor provides intrinsically safe power to the Sensors and Cannons. It interprets signals from the Unitized Sensor and indicates system status through dedicated LEDs. For external signaling and monitoring purposes, this module has relays for remote signaling and process shutdown.
The BS&B Type IPD Explosion Isolation System provides
protection to interconnected equipment in the event of an
explosion hazard. Ducting and piping that may connect
process equipment can transport an explosion risk originating
within a single piece of equipment. If unprotected,
this can present a risk to the ducting and piping itself as
well as all the connected vessels and equipment. The Type
IPD Explosion Isolation System is designed to inject a suppression
agent into ducting and piping to interrupt the transport of burning material.
The initial explosion hazard may be managed by one or
more of the following techniques:
- Explosion Venting
- Explosion Suppression
- Explosion Containment
In all cases burning material is produced (a lesser amount
when using explosion suppression which activates during
the early stages of an explosion to extinguish the developing
fireball) which will be transported through the open
connections in the protected equipment. Both inlets and
outlets are at risk; a normal air flow into the protected
equipment will be reversed by the force of an explosive
event. The IPD Explosion Isolation System is designed to
rapidly inject a suppression agent into ducting and piping to extinguish burning material as it is transported.