UL certifies TLX Technologies solenoid valve for clean agent and inert gas systems
Iain Hoey
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TLX Technologies achieves UL recognition for solenoid valve
TLX Technologies has announced that its Supervised Direct-Acting Solenoid Valve has completed testing and is now a UL 429 and UL 429A Recognized Component.
The company confirmed the certification on Tuesday 7 October 2025.
According to TLX Technologies, the solenoid valve is designed for clean agent, inert gas, carbon dioxide (CO₂) and hybrid fire suppression systems that use valve-integrated actuation.
The valve body can also be configured for use as a selector valve.
Compliance with NFPA 2001 and EN 15004-1 supervision standards
TLX Technologies said the valve features the same patented integrated supervision as its range of linear electric actuators for fire suppression.
It meets supervision requirements under Section 4.3.4.1 of the National Fire Protection Association (NFPA) 2001 standard and the EN 15004-1 European standard.
The company added that this design removes the need for an additional supervisory component or electrical connection.
This integration allows the valve to meet required supervision criteria while simplifying installation and maintenance.
Technical configuration and design options
The valve consists of a removable coil assembly and a threaded valve body.
TLX Technologies explained that the coil housing is made from electroless nickel-plated carbon steel.
Depending on system requirements, the valve body can be produced in brass or stainless steel.
In its standard form, the valve body includes a release valve and is available with 1/8-inch or 1/4-inch NPT thread options.
When specified for selector valve use, the valve body is modified to function as a coupler and can be customised for the specific selector valve design.
Ease of installation and maintenance features
The coil assembly is designed to rotate freely, providing flexibility during installation.
It includes a captured fastener to prevent loss when the coil is removed for testing or maintenance.
TLX Technologies said this fastener also ensures full seating of the coil on the valve body.
The feature provides technicians with confirmation that the coil has been correctly installed.
Relevance for fire and safety professionals
The UL 429 and UL 429A recognition for TLX Technologies’ Supervised Direct-Acting Solenoid Valve provides assurance for system manufacturers and designers developing clean agent, inert gas, CO₂ and hybrid suppression systems.
For fire engineers and mechanical contractors, the integrated supervision design could reduce wiring complexity and lower the number of components required for system compliance with NFPA 2001 and EN 15004-1.
Procurement officers and specification consultants involved in selecting UL-recognised components for global installations may find the new certification relevant when sourcing valves that combine supervision capability and simplified installation.