The L&J Technologies 94450 Combination Deflagration Flame Arrester & Free Vent is a Shand & Jurs tank protection fitting designed for applications that require both deflagration flame arrester functionality and free venting in a single compact assembly.
The 94450 is used where a vent opening must allow atmospheric breathing while also incorporating a flame-arresting element within the same fitting.
This model features an accessible, removable unitized tube bank that supports inspection and servicing without removing the entire fitting from the installation.

The tube bank is housed between the body and free vent adapter, with the hood and adapter designed to be removed as a unit. This configuration helps simplify access to internal components during routine maintenance review or service evaluation.
The 94450 is available in multiple vent sizes and construction material options, allowing engineers and maintenance teams to evaluate the fitting based on project requirements, flange connection needs, material selection, and application conditions.
Process Controls Corporation can help customers review the L&J Technologies 94450 Combination Deflagration Flame Arrester & Free Vent alongside related tank venting and flame arrester equipment to support proper product selection for the intended installation.
Key Characteristics
- Product Type: Combination deflagration flame arrester and free vent
- Model: 94450
- Brand Family: Shand & Jurs by L&J Technologies
- Configuration: Compact fitting combining flame arrester and free vent functions
- Tube Bank: Accessible, removable unitized tube bank for inspection and servicing
- Vent Sizes: Available in 2″, 3″, 4″, 6″, 8″, 10″, and 12″ sizes
- Connection Options: ANSI, EN1092-1, and JIS flange options available
- Body Material Options: Cast aluminum, cast steel, 304 stainless-steel, 316 stainless-steel, ductile iron, cast iron, Duplex stainless-steel, Hastelloy C, and Alloy 20 options
- Tube Bank Material Options: Carbon steel, 304 stainless-steel, 316 stainless-steel, Duplex stainless-steel, Hastelloy C, and Alloy 20 options
- Temperature Monitoring: Temperature monitor device available; installation location should be reviewed against the manufacturer’s technical data
- Approval References: ATEX EN 12874 and ISO 16852 are listed for the product family; final applicability should be confirmed by configuration, material selection, gas application, and installation requirements
Ideal Applications
- Storage tank vent openings requiring a combination flame arrester and free vent fitting
- Tank protection systems where deflagration flame arrester functionality is specified
- Atmospheric venting applications requiring a compact vent and arrester assembly
- Installations where removable tube bank access is important for inspection and service planning
- Industrial tank systems requiring evaluation of flange connection, size, material, and approval requirements before product selection




