DN 15–500
PN 16–160 / ANSI Class 600
Kvs 0.1–160
Electric / Pneumatic
The STEVI control valve series: the Canadian industry standard for precise flow and pressure control
The ARI STEVI control valve provides continuous adjustment of flow, pressure, or temperature within your industrial piping systems. Engineered and manufactured in Germany by ARI-Armaturen, it combines precise control, durable stem sealing, and outstanding modularity: interchangeable plugs, seats, and trims allow for precise tailoring to your specific operating conditions.
Whether regulating saturated or superheated steam, hot water, thermal oil, gases, or process fluids, there is a STEVI valve sized for your application. VAMECA, your Canadian ARI distributor, supports you from technical sizing to final delivery.
01
Precision Engineering
Optimized flow geometries combined with equal-percentage or linear characteristics deliver stable control, even under low-flow conditions.
02
Durability
Precise stem guidance, field-proven packings, and an optional stainless steel bellows guarantee an extended service life.
03
Variability
Interchangeable trim with up to 5 reducible Kvs values and multiple plug designs, all compatible with a single valve body.
04
German-Engineered Quality
In-house engineered and manufactured valves and actuators, certified to ISO 9001 and approved by DNV and Lloyd's Register.
Three product lines to meet every flow control requirement
From proven standard designs to high-performance solutions for critical conditions — choose the STEVI valve engineered for your specific process.
Proven Industry Standard
STEVI Smart
The standard valve for universal applications: cost-effective, reliable, and available in both 2-way straight and 3-way configurations for mixing or diverting.
Diameter
DN 15–500
Pressure
PN 16–40
Turndown Ratio
30:1
Series
440/441 · 450/451
Ideal for: cold/hot water, steam, HVAC mixing and diverting, and industrial applications.
Compact & Versatile
STEVI Vario
Over 150,000 configurations. Compact design, quick coupling, and a screwed-in seat up to 5 Kvs — the modern universal valve, fully compatible with digital actuators.
Diameter
DN 15–500
Pressure
PN 16–40
Kvs
Series
448 / 449
Ideal for: utilities, HVAC, and standard processes requiring compactness and flexibility.
High Performance
STEVI Pro
For professional control and critical service conditions: cavitation, flashing, high ΔP, and noise. Features multi-stage trim, blowout-proof stem, and guided plug.
Diameter
DN 15–250
Pressure
PN 16–160 · ANSI Class 600
Turndown Ratio
50:1
Series
470/471 · 422/462
Ideal for: superheated steam, flashing condensate, chemical processing, power generation, and high-pressure applications.
Selecting the Right Control Valve
Improper sizing leads to noise, premature wear, and poor control. Two key parameters are essential: the valve plug and the stem seal.
Valve design
Parabolic plug control valve
Recommended Standard: Highly resistant to fouling with superior control performance.
V-port control valve
When the maximum ΔP of the parabolic plug is exceeded, a reinforced guide is required.
Perforated Disc Guide
Severe service conditions: cavitation, flashing, aerodynamic noise, and choked flow.
Stem sealing
PTFE V-Ring Assembly
Up to 220°C: Spring-energized, maintenance-free.
Graphite packing
Up to 450°C: high-temperature, superheated steam applications.
Stainless Steel Bellows
Up to 450°C: 100% leak-tight sealing for toxic, flammable, and thermal oil media.
Provide your p1, p2, fluid, temperature, and flow rate parameters — we will size the valve utilizing myValve®.
A control valve for every application
VAMECA selects the precise STEVI control valve, check valve, sealing gland, and actuator tailored to your specific process media and operating conditions.
VALVE + ACTUATOR = 1
ARI Actuators & Positioners
The ARI advantage: both valves and actuators are designed in-house. We recommend the optimal valve-actuator combination tailored precisely to your application.
ARI-DP — Pneumatic Linear Actuators
Wide spring rangeability, maintenance-free O-ring sealing, bellows-protected stem, and reversible action. Max. air pressure 6 bar.
PREMIO Plus 2G — Electric Actuators
Low-consumption BLDC motor, self-initialization, Economy function, with fail-safe option. Force ranges from 2.2 to 25 kN. Compatible with myPREMIO app via Bluetooth.
STEVI-Pos — Digital Electropneumatic Positioner
Air-optimizing piezo technology, non-contact Hall sensor (wear-free), 4–20 mA input, rapid initialization, and simple diagnostics.
STEVI Special Configurations
Beyond these three main product lines, we offer engineered configurations tailored to specific applications.
STEVI 453
Feedwater
Valve with integrated pump recirculation for boiler protection.
STEVI 405/460
Automatic Shut-off
Automated isolation valve with electric or pneumatic actuator.
STEVI 415
Blowdown
Automatic blowdown valve for steam boilers and autoclaves.
STEVI H
Compact and lightweight
Low-pressure drop light-duty HVAC valve with maintenance-free EPDM sealing.
ARI-Armaturen Industrial Valves and Sealing Solutions
VAMECA supports industrial operators across Quebec and Canada in the selection, replacement, and supply of ARI-Armaturen products for steam, thermal oil, hot water, condensate, and industrial utility applications. We specialize in the core ARI product lines: ARI-STEVI control valves, ARI-SAFE and REYCO safety valves, ARI-CONA steam traps, ARI-FABA and ARI-STOBU isolation valves, ARI-SYStem complete engineered systems, ARI-CODI condensate manifolds, ARI-PRESO / PREDU pressure regulators, and ARI-ZETRIX triple-offset butterfly valves.
Depending on your specific application, our engineering team assists you in validating the correct equipment based on fluid compatibility, operating pressure, temperature limits, nominal diameter, connection type, pressure rating, materials of construction, governing standards, and project documentation requirements.
Safety and Reliability
ARI-SAFE / REYCO
Flanged safety valves (DIN/EN and ANSI Full Nozzle) for steam, neutral gases, and liquids — ASME/CRN compliant.
Discover ARI SAFE/REYCO Valves →
Isolation
ARI-FABA
Bellows-sealed globe valves for steam, gas, and thermal oil applications.
Discover ARI FABA Stop Valves →
Pressure Relief
ARI-PRESO/PREDU
Direct-acting pressure reducing valves and regulators for steam, gas, and liquids, ensuring stable and safe downstream pressure.
Discover ARI PRESO regulators →
Your partner for control valves in Canada
More than just a supplier: a technical partner that translates your process constraints into a reliable, precisely sized, and quickly delivered valve solution.
A local representative in Canada
Based in Quebec and Canada, we support industrial and infrastructure projects in direct collaboration with local stakeholders.
Technical support in the preliminary stages
Pressure, temperature, fluid characteristics, operating conditions:
we assess your parameters to select the most suitable, durable equipment that complies with applicable standards
Your direct link to ARI-Armaturen
We work in direct partnership with ARI-Armaturen.
This ensures reliable technical specifications, rapid communication, and seamless project continuity, from the initial consultation through to final delivery.
