The SIT Flame Failure Valve 0420003 is a tough and reliable flame supervision device (FSD) for enhanced safety in all types of gas control systems. Built for professional use, it will cut off the gas supply if the flame goes out – protecting you, your equipment and your installation.
With 1/4” BSPM inlet and outlet connections, a 1/8” BSPM pilot outlet (with 6mm nut and olive) and an operating pressure of up to 3 bar, this SIT FFD is designed for harsh environments where safety and reliability are key.
For Natural Gas and LPG systems, this compact and robust valve will give you consistent flame supervision in commercial, industrial and domestic gas control applications.
Key Features & Benefits
Reliable Flame Supervision Device (FSD) – Will shut off gas flow if the flame fails.
High Operating Pressure – Up to 3 bar for demanding and high performance gas systems.
Standard BSP Connections – 1/4” BSPM inlet and outlet for quick and easy connection to most systems.
Dedicated Pilot Outlet – 1/8” BSPM pilot outlet with 6mm nut and olive for easy, leak free pilot line connections.
Durable Construction – Built for long life in commercial and industrial environments.
Easy to Install – Compact, offset straight-through design for flexible mounting in any orientation.
Enhanced Safety & Efficiency – Your gas appliances will operate safely with uninterrupted flame monitoring.
Versatile Applications – Natural Gas and LPG systems in heating, catering and manufacturing equipment.
Ideal For
Gas safety and control systems<
Commercial catering and industrial burners
Heaters, ovens and fryers
OEM appliance manufacturing
Maintenance and retrofit applications
Why Buy the SIT 3 Bar Flame Failure Valve
The SIT FFD 0420003 provides reliable gas shut-off protection with robust construction, easy installation, and high-pressure capability. Its precision design ensures lasting performance in both domestic and commercial gas systems — a trusted safety essential from a leading manufacturer.
Stay protected and compliant — order the SIT Flame Failure Valve (FFD) – Up to 3 Bar today for dependable flame supervision and peace of mind. Fast UK & Ireland delivery available.
Specification
SIT Flame Failure Valve (FFD) - Up to 3 Bar Specification
Manufacturer
SIT
Model
0420003
Product Type
Flame Failure Device (FFD)
Approvals
BS EN 125:1991
Connection
1/4" BSP PM (inlet and outlet)
Pilot Outlet
1/8" BSPM with 6mm nut & olive
Thermocouple Connection
M8
Operating Pressure
Up to 3 bar
Temperature Range
0°C to 50°C
Working Temperature Range
-10°C to 80°C
Gas Type
Natural Gas & LPG
Dimensions
Length: 92mm (end of push button to magnet housing); Width: 52mm
Mounting Hole Size
16–18mm Ø
Mounting Orientation
Any Orientation
Design
Offset straight-through valve
Suitable Applications
Various gas control systems and safety installations
Warranty
12 Months
Features
SIT Flame Failure Valve (FFD) - Up to 3 Bar Features
Reliable Flame Supervision Device (FSD) – Provides dependable protection by automatically shutting off gas flow in case of flame failure.
High Operating Pressure – Handles pressures up to 3 bar, suitable for demanding and high-performance gas systems.
Standard BSP Connections – 1/4” BSPM inlet and outlet ensure quick and secure integration into most systems.
Dedicated Pilot Outlet – Includes 1/8” BSPM pilot outlet with 6mm nut and olive for easy, leak-free pilot line connections.
Durable Construction – Engineered for long-term performance in both commercial and industrial environments.
Easy to Install – Compact, offset straight-through design allows flexible mounting in any orientation.
Enhanced Safety & Efficiency – Ensures your gas appliances operate safely with uninterrupted flame monitoring.
Versatile Applications – Suitable for Natural Gas and LPG systems in heating, catering, and manufacturing equipment.
Questions
Reviews
SIT Flame Failure Valve (FFD) - Up to 3 Bar Reviews
