The Dival 500 H by Pietro Fiorentini is a lever-operated gas pressure regulator controlled by a diaphragm and regulated spring action. It is specifically designed for 100% hydrogen applications and is classified as Fail Open according to the European Standard EN 334. This device is used in medium and low pressure gas distribution networks, as well as in commercial and industrial settings such as district stations, electrolyzers downstream applications, medium/small industry, blending units, and commercial users. The Dival 500 H offers high accuracy, easy maintenance, and built-in accessories, making it a reliable and efficient solution for gas pressure regulation. It is certified under European Directive 2014/68/EU (PED) and meets leakage class standards better than class VIII according to ANSI/FCI 70-3. The product is available in various nominal sizes (DN 25x25 | 1x1; DN 25x40 | 1x1 1/2) and features threaded connections (Rp EN 10226-1, NPT ASME B1.20.1). It operates within a wide range of ambient and inlet gas temperatures, from -20 °C to +60 °C (-4 °F to +140 °F), and supports different pressure ranges depending on the application (BP, MP, TR). The Dival 500 H is a balanced type regulator that operates with low differential pressure, ensuring precise and stable gas pressure control.
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