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Hydrogen Pressure Reducing Valves

Pressure reducing valve DM 510-514

Mankenberg GmbH

  • Self-acting pressure reducing valve for high pressures.
  • Diaphragm-, piston-, or bellows-controlled spring-loaded design.
  • Multiple seat designs per size.
  • Soft or metallic valve cone sealing options.
  • Pressure gauge connection (optional).
  • Hard-faced valve cone and seat (optional).
  • Leakage classes III or V, optional IV, per DIN EN 60534-4 / ANSI FCI 70-2.

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Description Vendor

Self-acting pressure reducers are simple control valves offering accurate control while being easy to install and maintain. They control the pressure downstream of the valve without requiring pneumatic or electrical control elements. The DM 510 and DM 514 pressure reducing valves are diaphragm, piston or bellows-controlled spring-loaded proportional control valves for high inlet and outlet pressures. They can be supplied with three types of connections: sockets, flanges and welding spigots. Each size of valve may be fitted with three different seats. The valve cone may be fitted with a soft or metallic seal.

Use Cases

  • Typically used in high-pressure industrial fluid and gas control applications.

Capabilities

  • Reduces inlet pressures up to 320 bar to controlled outlet pressures up to 160 bar, depending on model and setting range.
  • Operates without external power or control systems.
  • Suitable for liquids, gases, and steam up to 400 °C (depending on materials).
  • Configurable with different control principles (diaphragm, piston, bellows).
  • Supports multiple connection standards and custom materials for demanding media.
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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