IVAR.GST-L-FM/MF - excess flow safety valves

This category includes IVAR.GST-L-FM and IVAR.GST-L-MF safety overcurrent fuses designed for gas systems. These fuses are used to block gas flow when the nominal flow rate is exceeded, ensuring system safety and compliance with PTN 704 05 standards. They are suitable for heating, plumbing, and industrial gas applications where overpressure or overcurrent protection is required.

Constructed from stainless steel AISI 316, these fuses offer durability and resistance to harsh environments. They operate within a temperature range of -20°C to +60°C and can withstand internal temperatures up to +200°C and external temperatures up to +925°C for 60 minutes. Available with various connection sizes and thread types, they integrate into a wide range of gas systems.

How to choose

• Match the nominal flow rate (e.g., 2.5m3/h, 4m3/h, 6m3/h, 16m3/h) to the system’s maximum expected gas flow.
• Select the correct thread type and size (FM or MF, 1/2", 3/4", 1", 5/4", 6/4", 2") to ensure compatibility with the system’s piping.
• Verify operating pressure range (15 to 100 mbar) aligns with the system’s working conditions.
• Confirm temperature resistance meets the installation environment requirements, particularly for high-temperature exposure.
• Ensure material compatibility with the gas type and system components, especially in corrosive or high-temperature environments.

Frequently asked questions

What happens when the nominal flow rate is exceeded?
The fuse automatically blocks gas flow to prevent overcurrent or overpressure conditions.

Can these fuses be used in high-temperature environments?
Yes, they are designed to withstand external temperatures up to +925°C for 60 minutes and internal temperatures up to +200°C.