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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-12602066-B1, on 14 April 2026. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000000733

Non-permissive fire connection system

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Classification
Sensors, Controls & Machine Vision › Industrial Control
Original source
US-12602066-B1, the United States Patent and Trademark Office, 14 April 2026
Document SHA-256
b9fa1e2a58240ff83d89b6255bd44b990a45e55f4ba4379773d353edc43e6468

Abstract

A system and method for preventing a hydrocarbon fuel from being pumped through a fire department connection line (FDCL) of a building into a riser line and a sprinkler system of the building (SSoB) is disclosed. The method employs a non-permissive fire connection system (NPFCS) installed in-line with the FDCL, within the building. The NPFCS includes a hydrocarbon detection sensor (HDS), an electronic shut-off valve (ESV), an ESV activation logic circuit, and a fail-safe logic circuit. The HDS is calibrated to detect a hydrocarbon in a liquid being pumped into the FDCL. When the liquid is the hydrocarbon fuel, a hydrocarbon is detected by the HIDS in the hydrocarbon fuel being pumped into the FDCL. When the hydrocarbon is detected by the HDS, the ESV activation logic circuit closes the ESV and shuts off the flow of the hydrocarbon fuel into the riser line and the SSoB.

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Citation

OpenTechnical Publication OT-2026-000000733, “Non-permissive fire connection system,” published September 15, 2026 at 19:03:19 UTC, https://opentechnical.org/p/OT-2026-000000733.

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