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Hydrogen Back Pressure Regulators

Back Pressure Regulators UV 3.0 ATEX H2

Mankenberg GmbH

  • Back pressure regulator for ex atmospheres.
  • Designed for very small outlet pressures (millibar control).
  • Self-acting operation without pneumatic or electrical elements.
  • All-stainless-steel construction (1.4404 / 316L).
  • Soft-sealed valve cone.
  • Mandatory sense line connection.
  • Compliance with ATEX 2014/34/EU and DIN EN ISO 80079-36.

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Description Vendor

The UV 3.0 ATEX H2 Back Pressure Regulator is a self-acting, diaphragm-controlled spring-loaded proportional control valve designed for precise pressure control in explosive atmospheres (ex atmospheres) with small to medium flow rates. It is constructed from deep-drawn stainless steel (1.4404/316L) for excellent corrosion resistance and features a soft seal on the valve cone. This regulator operates without requiring pneumatic or electrical control elements, making it easy to install and maintain. It is compliant with the ATEX directive 2014/34/EU and DIN EN ISO 80079-36, ensuring safety in hazardous environments. The valve includes a leakage line connection, an adjustable screw with seal and lock, potential equalization, protected body connections, a grounding lug, and the use of low-spark materials. It is suitable for gases and liquids, with a temperature range of -10°C to +50°C and a pressure range of 0.002 to 0.52 bar. The regulator offers accurate pressure control by balancing the inlet pressure against the valve spring force, and it is available in various Kvs values and diaphragm sizes to suit different applications.

Use Cases

  • Precise millibar-level upstream pressure control in ATEX hazardous areas.
  • Regulation of gases and liquids at very low pressures and small to medium flow rates.

Capabilities

  • Controls upstream pressure within 0.002 – 0.52 bar, depending on diaphragm and spring selection.
  • Operates fully self-acting, without external energy.
  • Supports DN 15–50 with Kvs values from 0.2 to 3.6 m³/h.
  • Designed for easy maintenance and configurability, including diaphragm and seal options.
  • Certified for ATEX hazardous environments.
Mankenberg GmbH Mankenberg GmbH, founded in 1885 by Gustav Mankenberg and headquartered in Lubeck, Germany with 185 employees (end of 2024), is a manufacturer of self-acting control valves for pressure and level control, focusing on standard products alongside customized solutions for demanding industrial applications, and has developed products specifically supporting hydrogen production via PEM electrolysis. The company's ATEX-compliant hydrogen pressure regulators, including the DM 555 (spring-loaded proportional control valve for small/medium flow rates, stainless steel 316L body and wetted parts), DM 652 (diaphragm-controlled, spring-loaded, and balanced proportional control valve for medium/large flow rates), and UV 5.1/UV 3.5 back pressure regulators/pressure sustaining valves, are manufactured entirely of high-quality stainless steel via deep-drawing processes for lightweight, compact, corrosion-resistant construction meeting DIN EN 60534-4 and ANSI FCI 70-2 leakage classification standards. Mankenberg's ATEX marking (Ex II 2G Ex h IIB+H2 85 degrees C) certifies suitability for use in explosive hydrogen atmospheres, with the company's self-acting valve technology featuring compact design, pressure resistance, and high corrosion resistance particularly suited to PEM electrolysis (protone exchange membrane electrolysis, considered to have the greatest potential among current hydrogen production processes) applications requiring precise pressure control without pneumatic or electrical control elements. As green hydrogen breaks down water into hydrogen and oxygen via electrolysis using electrical voltage and becomes increasingly important for electricity, heat, and energy storage as a flexible energy carrier, Mankenberg continues supplying specifically-developed self-acting control valve products supporting the growing hydrogen production infrastructure market.
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