ARI Armaturen Control Valves
ARI Armaturen Control Valves – The STEVI Range for Steam, Gas, and Liquid Applications
ARI Armaturen control valves are engineered for precision, reliability, and performance in demanding industrial environments. Designed and manufactured in Germany, ARI Armaturen offers a comprehensive range of modular globe-style control valves under the STEVI designation. The ARI STEVI range is purpose-built to handle steam, thermal oil, water, and aggressive media across a wide temperature and pressure spectrum. These control valves are widely used in critical steam control applications due to their durability, adaptability, and compliance with international standards.
The ARI STEVI control valve series includes variants such as the STEVI Smart 425/426, STEVI Pro 470/471, and STEVI Compact 440/441. These models cover a broad performance envelope, with pressure ratings up to PN40 and temperature resistance exceeding 400°C, depending on body and trim material selection. Each ARI STEVI control valve is designed to provide exacting modulation in continuous process applications, with high control accuracy and tight shut-off capabilities that support EN 60534 and EN 12266 standards.
Key Features of the ARI STEVI Control Valve Range
ARI Armaturen control valves are built around a modular design that simplifies maintenance and enhances flexibility in plant operations. Key engineering features include:
Precisely machined plug-and-seat trim for reliable flow regulation and excellent leakage control, with standard leakage classes ranging from Class IV to Class VI.
Actuator versatility, allowing for integration with pneumatic (spring-return or double acting), electric (with or without fail-safe), or manual actuators.
Robust bonnet design for high-pressure and high-temperature stability, including extended bonnets for thermal insulation and optional bellows sealing for zero emission applications.
Optional noise reduction and anti-cavitation trims, designed to prevent vibration and wear in high ΔP environments.
Wide material selection, including cast iron, carbon steel, stainless steel, and special alloys for corrosive or high-temperature media.
The ARI STEVI 470/471 (Pro) series, for example, is ideal for high-precision steam control in power generation, while the STEVI 440/441 (Compact) valves offer a shorter face-to-face design for space-constrained installations. For applications requiring high flow coefficients and tight control, the STEVI 425/426 (Smart) variants include integrated ARI positioners and are suitable for modern automation environments.
Industry Applications of ARI Armaturen Control Valves
ARI Armaturen control valves are commonly installed in systems where process integrity and energy efficiency are paramount. These include:
Steam distribution networks in industrial and commercial facilities
Boiler feedwater and condensate control systems
District heating systems requiring stable modulation under varying loads
Petrochemical and chemical plants, where aggressive fluids and temperature cycling are common
Pharmaceutical manufacturing, requiring sterile and reliable media control
Food and beverage process lines, where hygiene and thermal stability are essential
Marine and offshore installations, where reliability in harsh conditions is critical
The combination of high-quality German manufacturing, modular architecture, and comprehensive actuator compatibility makes ARI Armaturen a trusted choice for process engineers, plant managers, and OEMs around the world. Whether for on/off isolation, precision control, or fail-safe modulation, ARI STEVI control valves consistently meet performance and lifecycle expectations.
About ARI Armaturen
Founded in 1950, ARI Armaturen is a German manufacturer of industrial valves focused on steam, condensate, and thermal fluid systems. With over 20,000 valve configurations available, ARI is known for its robust engineering, in-house manufacturing, and rigorous quality assurance processes. All ARI Armaturen control valves are designed and tested in accordance with relevant international directives, including PED, ATEX, and TA-Luft for emissions compliance.
Their product portfolio spans four key categories: isolation (e.g. bellows sealed globe valves), control (e.g. STEVI range), safety (e.g. safety valves to EN ISO 4126), and steam trapping (e.g. CONA series). The ARI STEVI control valve range sits at the core of this offering, providing tailored modulation for thermal energy systems across all major industries.
Contact SteamValves.co.uk for ARI Control Valves
At SteamValves.co.uk, we stock and support the full range of ARI Armaturen control valves, including the complete ARI STEVI range. With technical expertise in steam and process systems, we can assist with valve selection, sizing, and custom configurations tailored to your site requirements. Whether for a retrofit, new installation, or replacement part, our in-depth product knowledge and direct supplier relationships ensure fast lead times and reliable service.
