Pressure Reducing Valve DM 652 ATEX H2

Mankenberg GmbH

Pressure reducing valve for ex atmospheres and medium to high flow rates
Self-acting pressure reducers with accurate control and easy installation/maintenance
Diaphragm-controlled spring-loaded and balanced proportional control valve
Manufactured from deep-drawn stainless steel with excellent corrosion resistance
Soft seal on valve cone

The Pressure reducing valve DM 652 ATEX H2 is a self-acting pressure reducer designed for use in explosive atmospheres (ATEX) and suitable for medium to high flow rates. It is a diaphragm-controlled, spring-loaded, and balanced proportional control valve, constructed from deep-drawn stainless steel for excellent corrosion resistance. The valve cone is fitted with a soft seal, and the spring module, comprising spring cap, spring, adjusting screw, diaphragm, and internal components, is connected to the valve body via a clamp ring and two bolts. This design allows for easy replacement of the diaphragm or spring assembly without special tools. The valve operates by balancing the outlet pressure against the force of the valve spring, adjusting the outlet pressure through the adjusting screw. It is compliant with ATEX directive 2014/34/EU and DIN EN ISO 80079-36, featuring a leakage line connection, adjusting screw seal and lock, potential equalization, protected body connections, and a grounding lug. The valve is suitable for liquids, gases, and steam, with a temperature range of -10°C to 130°C and a nominal pressure of 40 bar. It offers various Kvs values and setting ranges, and is available in different materials and configurations to suit various applications.

Use Cases

Typically used in hydrogen and related industrial applications.

Capabilities

Reduces inlet pressure up to 40 bar to a controlled outlet pressure within defined setting ranges (0.1–12 bar).
Operates without pneumatic or electrical actuation (self-acting).
Suitable for liquids, gases, and steam within the specified temperature and pressure limits.
Designed for use in explosive atmospheres in accordance with ATEX 2014/34/EU.
Supports DN 15–50 with Kvs values from 5 to 22 m³/h (depending on size).

Mankenberg GmbH

Mankenberg GmbH is a German manufacturer specializing in high-quality industrial valves with a strong focus on pressure regulation, safety, and durability. With more than 140 years of engineering expertise, the company delivers robust stainless-steel valves designed for demanding and safety-critical applications. In the hydrogen economy, Mankenberg’s self-acting pressure regulators, back-pressure valves, and safety valves support safe and efficient handling of hydrogen across production, transport, storage, and fueling infrastructure. Their products emphasize reliability, leak-tightness, and compatibility with hydrogen’s unique properties, making Mankenberg a trusted partner for emerging H₂ technologies and sustainable energy systems.

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