Supervised Latching Solenoid Actuator for Gaseous Fire Suppression Systems

August 18, 2020

TLX Technologies custom designs electromagnetic products for clients’ unique fire protection applications. Their cutting-edge designs include latching, on-off, high-speed, high-temperature, and proportional solenoids, as well as solenoid valves.

The supervised latching solenoid actuator is TLX Technologies’ most popular fire protection actuator and is one of the primary releasing devices used on gaseous extinguishing systems. This actuator is usually attached to the suppressant’s discharge valve and electrically connected to the Fire Alarm Control Panel (FACP). When the actuator receives the suppressant release signal, it causes the discharge valve(s) to open and dispense the extinguishing agent.

The supervised latching solenoid actuator is designed with an internal supervisory feature that eliminates the need for an additional component or electrical connection. Without a supervisory signal, no alarm would be triggered if the electrical connection between the system control panel and the actuator was removed or left disconnected after routine system maintenance.

This lack of operability checks leaves the responsibility of proper re-installment after maintenance solely on the technician. Multiple cases have been reported of electric actuators being improperly installed by a technician and, in some instances, left physically unattached altogether. This improper installment means the system is unable to function, leaving the building unprotected from fires.

In addition, due to an often obstructed view between the mating surfaces of the components, any damage or nonconforming parts impeding the actuator could go undetected. Releasing devices also have lengthy intervals between periodic maintenance, allowing any dangerous issues to remain undetected. If the extinguishing system control panel cannot detect the position of the actuator or any changes to it, the building is again left unprotected from fires. This potential danger is what makes internal supervision so important.

Other features of this actuator include ultra-fast responses, rotation for easy installation, custom configuration, and the ability to be reset for future use. The actuator is offered in multiple sizes to accommodate different system operating pressures. A pneumatic actuator is also available to provide a complete solution for fire suppression systems.

This actuator is a UL Recognized Component and complies with NFPA 2001: Sec. 4.3.4.1.

This article was originally published by Asia Pacific Fire in July 2020