Kromschroder Safety shut-off valve JSAV25R40/1-0 86361010

The Kromschroder JSAV25R40/1-0 (SKU 86361010) is an over-pressure shut-off valve with a nominal diameter of 25 mm and Rp 1" connection thread. It is designed to automatically close and cut off gas supply when the downstream pressure exceeds the set limit, protecting equipment from overpressure. The valve has a maximum inlet pressure of 4000 mbar and a trip range lower limit of 8-16 mbar. Its body is made of aluminum alloy, and it is EU certified. This valve is manufactured in Germany.

When selecting a replacement safety shut-off valve of this type, verify the nominal diameter and connection thread to match the existing piping. Ensure the maximum inlet pressure rating is suitable for the system's operating pressure. Check the trip range settings to confirm they align with the required protection thresholds. The valve should be installed in the correct orientation, typically with the flow direction indicated on the body, and downstream of the pressure regulator.

Common failures of this type of valve include leakage past the seat, which may cause gas to flow even when the valve is closed, or failure to close on overpressure due to a stuck mechanism or damaged diaphragm. Symptoms on the equipment may include pressure fluctuations downstream, gas odor, or the burner not shutting off properly. Check the valve's trip mechanism and seat for debris or wear, and verify that the inlet pressure does not exceed the valve's maximum rating.