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Hydrogen Back Pressure Regulators

Back pressure regulators UV 3.5 ATEX H2

Mankenberg GmbH

  • Back pressure regulators for ex atmospheres and small flow rates
  • Self-acting control valves with accurate pressure control
  • Easy installation and maintenance
  • Available with metallic or soft seals
  • Compliance with ATEX directive 2014/34/EU and DIN EN ISO 80079-36

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Description Vendor

The primary product is the Back pressure regulators UV 3.5 ATEX H2, a self-acting back pressure regulator designed for use in explosive atmospheres (ATEX) and for controlling small flow rates. It is a spring-loaded diaphragm-controlled proportional control valve that ensures accurate pressure control without requiring external pneumatic or electrical control elements. The valve is constructed from deep-drawn stainless steel, providing excellent corrosion resistance, and features a non-rising adjusting screw for easy adjustment. It is compliant with ATEX directive 2014/34/EU and DIN EN ISO 80079-36, ensuring safety in hazardous environments. The valve can be fitted with metallic or soft seals and is suitable for liquids and gases. It has a wide range of setting ranges (0.005 - 20 bar) and is available in various configurations, including the UV 3.5S and UV 3.5Z models, which require a pilot line for installation. The valve is designed for easy maintenance and adjustment, with the ability to change the diaphragm or spring assembly without special tools. It is suitable for a wide range of temperatures (-20°C to 130°C) and is available with various connection options, including G 1/2 and flanges. The product is marketed as a reliable and efficient solution for pressure control in hazardous environments, ensuring safety and precision.

Use Cases

  • Pressure control upstream of pipelines in hazardous (ATEX) areas.
  • Applications with small liquid or gas flow rates in ex environments.

Capabilities

  • Controls inlet (upstream) pressure between 0.005 and 20 bar, depending on spring range.
  • Operates self-acting, without external pneumatic or electrical energy.
  • Suitable for liquids and gases within the specified pressure and temperature limits.
  • Configurable via three seat sizes (Kvs 0.2–0.9 m³/h).
  • Allows easy maintenance and reconfiguration by changing diaphragm or spring assembly.
  • Certified for ATEX Zone 1/2 hazardous environments (Ex II 2G).
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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