STEVI - Control valves
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Control valves in more than 100,000 variants! – Individual. Precise. Durable: Expert control STEVI® Vario STEVI® Smart STEVI® Smart: The classic standard valve for universal applications (Series 440/441) 3-way valves: Precision mixing / diverting (Series 450/451) STEVI® Vario: The variable, compact control valve (Series 448/449) STEVI® Pro: The high-performance control valve for critical applications (Series 470/4

STEVI® Smart STEVI® Smart (straightway valves, Series 440/441) The classic standard valve for universal applications Precision mixing/ diverting Stem seal options for flexibility (here: PTFE V-ring units) Economical due to rolled seat ring Optional pressure balancing plug reduces the required actuator forces and enables increased efficiency Plug design: Parabolic plug, optional V-port plug (optional pressure balancing in both cases from DN 65) / equal-percentage or linear characteristic ■■ 50:1 rangeability for precision and high performance (inherent rangeability 40:1) Variable: mixing...

STEVI® Vario (straightway valves, Series 448/449) The variable, compact control valve (straightway valves, Series 422/462, 470/471, 472) The high-performance control valve for professional control and critical applications Series 448 DP Series 470 Series 448 PREMIO® Stable shaft guiding for precision and durability Rotatable upper part for optimum handling Screwed seat ring provides flexibility Safe even under exacting conditions (blow-out proof stem / shaft guided plug) Flexibility: variable in situ replacement of the trim – stem, plug (here: perforated plug) and seat ring Precise and high...

ARI-DP pneumatic actuators ARI-PREMIO® and PREMIO® Plus 2G electric actuators Reduced power consumption, optimised handling, extended lifetime DP35 High performance: broad spring rangeability (higher closing forces) Practical: reversible operating direction Economical: favourable size / performance ratio Variable: wide range of accessories (positioners, solenoid valves, limit switches, etc.) Nominal diameter: Diaphragm area 80-2800 cm² Sizes up to 2800 cm² diaphragm area (DP 35) Durable even in aggressive environments: corrosion-resistant design (optional) Max. permitted air supply...

“Even more STEVI® diversity…” STEVI® H Series 453 Series 405/460 Feedwater control valve with integrated pump spill-back Automatic blow-down valve – e.g. for steam boilers or autoclaves Automatic stop valve (with electric or pneumatic actuator) Lightweight, compact valve Permanently reliable because the pump is protected (guaranteed supply of feedwater – integrated pump spill-back) Variable: Kvs values adapted to the quantities required Long life: trim optimised for critical operating conditions Applications: Boiler construction / plant manufacturing 8 Optimum handling: compact design...

Reliable, precise, individual for more than 40 years  … … Control valve technologies for control and mixing / diverting ■■ ■■ More than forty years experience in the development and sale of advanced control valve technologies the highest possible precision and subjected to continuous in-process quality controls Your strong service partner – with 13 branches and sales partners in more than 60 countries worldwide A sharp focus on our customers, competent advice and short delivery times All ARI products are developed in keeping with the very latest design standards, tested under the most...

ARI’s own test bench Finite element analysis The finite element analysis (FEA) is a numerical calculation technique that is used to simulate stresses and their distribution. The aim is to achieve the required strength at pressure load levels in combination with an optimal weight and a flow friendly shape. State-of-the-art flow simulations The twofold objective of uniform flow and high flow capacity is realised with the aid of special flow software. The software simulations enable the flow velocity, flow direction and pressure distribution to be visualised. Due to the optimised...

Your strong partner – in more than 60 countries worldwide For control – isolation – safety – steam trapping – system engineering. ●  Branch offices ● Agents Technology is our life Highly qualified ARI engineers develop products for tomorrow’s world using the very latest techniques. Our suppliers are selected according to the strictest possible criteria, to ensure that only premium quality materials are used. Our state-of-the-art production technologies leave no room for mistakes. Thanks to our dense sales network, expert advice is available from a sales partner close to you in more than 60...

ARI product diversity Control Control valve STEVI® Smart (Series 423/463, 425/426, 440/441, 450/451) STEVI® Vario (Series 448/449) Control without auxiliary power PREDU® / PREDEX® / PRESO® / TEMPTROL® Process valve ZETRIX® Butterfly valve ZIVA® Bellows sealed valve FABA® Plus, FABA® Supra I/C Stop valves with gland seal STOBU® Safety valves SAFE TCP Safety valves (API 526) ARI-REYCO™ Safety valves (ANSI) ARI-REYCO™ RL-series Steam trapping Steam traps CONA® (mechanical ball float / thermostatic bimetallic and membrane / thermodynamic), monitoring systems CONA® Control Manifolds CODI® for...