{"id":9861,"date":"2017-06-12T07:00:38","date_gmt":"2017-06-12T05:00:38","guid":{"rendered":"https:\/\/www.gok-blog.de\/2017\/06\/12\/how-does-an-excess-flow-device-work\/"},"modified":"2026-06-15T09:10:37","modified_gmt":"2026-06-15T07:10:37","slug":"how-does-an-excess-flow-device-work","status":"publish","type":"post","link":"https:\/\/www.gok-blog.de\/en\/how-does-an-excess-flow-device-work\/","title":{"rendered":"How does a hose break safety device work? \u2013 Functionality & Safety explained"},"content":{"rendered":"

A hose rupture or a major leak can quickly become dangerous: within seconds, unburnt liquefied gas may escape uncontrollably. A hose break\u2011safety device (HBS) reliably protects in such cases by automatically interrupting the gas supply.
\n<\/p>\n

Whether camping, barbecuing or heating \u2013 liquefied gas systems are practical, but they also carry risks, just like many other energy media. One of the most important safety components for liquefied gas systems is the hose break\u2011safety device. It detects when gas flow suddenly and unusually increases and immediately shuts off the supply. But how does this technology work in detail? When does it activate, and what standard values apply? In this article, we explain the functionality of an HBS, provide practical examples, and show why it is indispensable in many applications.<\/p>\n

\"GOK<\/a>
GOK automatic excess flow device for enhanced safety in LPG installations<\/figcaption><\/figure>\n

<\/span>What is a hose break\u2011safety device?<\/span><\/h2>\n

A hose break\u2011safety device<\/a>, or HBS, is a safety component in liquefied gas systems. Its main function: to automatically interrupt the gas flow if a serious leak occurs in a hose line. This prevents large amounts of liquefied gas from escaping uncontrollably\u2014an important protection against fire and explosion hazards.<\/p>\n

The HBS is used in many areas: from a gas barbecue on the patio to applications while camping in a motorhome or caravan, to heating appliances or commercial liquefied gas systems. Its principle is similar to that of an \u201caquastop\u201d in washing machines: should a leak occur, the device immediately reacts and shuts off the flow.<\/p>\n

The HBS may either be installed as a separate component directly between the pressure regulator and the hose, or already integrated into the pressure regulator. Which design is used depends on the specific system and requirements.<\/p>\n

\"In<\/a>
In the event of a leak in the hose assembly, the excess flow device prevents the uncontrolled release of large quantities of gas.<\/figcaption><\/figure>\n

 <\/p>\n

\n

You might also be interested in<\/span><\/p>\n

Discover more helpful content on this topic.<\/p>\n

See related posts<\/a><\/p>\n<\/div>\n

<\/span>How the hose break\u2011safety device works<\/span><\/h2>\n

Inside a hose break\u2011safety device is a special mechanism that responds to gas flow. Under normal conditions, gas flows through the device at a constant rate intended for the system. If the flow suddenly increases significantly\u2014e.g. due to a rupture or separation of the hose\u2014the HBS detects this abnormal rate and activates.<\/p>\n

The heart of the device is a closing cone or valve pin that is propelled by the high gas flow. Within seconds, it completely blocks the passage. Gas flow stops, and no more liquefied gas can escape uncontrollably.<\/p>\n

There are two versions of HBS:<\/p>\n