STEVI^® Vario

Complete solution, endless possibilities

The STEVI Vario is a variable, compact control valve for universal applications. It is based on a modular system, which means that the configuration is adaptable to the task at hand.

Nominal diameter:		DN 15-100 / NPS ½" - 4"
Nominal pressure:		PN 16-40, ANSI 150
Body materials:		EN-JL1040, EN-JS1049, 1.0619+N, 1.4408, SA216WCB, SA351CF8M
Temperature:		Series 448: -10 to max 220°C (depending on the stem seal) Series 449: -10 to 400°C (optionally -60°C)
Kvs values:		0,1 - 160m³/h
Plug design:		Parabolic plug, perforated plug (optional)
Characteristic:		Equal-percentage or linear
Rangeability:		50:1 (e.g. for a parabolic plug with an equal-percentage characteristic)
Leakage class:		IV, optionally IV-S1 or VI
Stem seals:		PTFE V-ring units, EPDM, stainless steel bellows
Actuators:		Electric or pneumatic
Flow media:		Cold water, hot water, saturated steam, superheated steam, gases, coolants, brine, refrigerants, heat transfer oils ...

Faster selection owing to ARI-myValve^®, the user-friendly sizing and selection software

Short delivery times owing to advanced production, assembly and testing processes (e.g. 48 h for defined standard versions)

Perfect fit, even in tight spaces, owing to the lower height – up to 25% smaller*

Easy handling owing to the reduced weight – up to 25% lighter*

Maximum flexibility because the actuators can be turned 360°

*Compared to STEVI^® Smart and STEVI^® Pro

Rotatable upper part for optimum handling. The mounted actuator can be turned 360° and individually aligned according to the installation conditions.

Rugged and durable owing to the vibration-free, shaft guided plug.

Optional: Armoured sealing edge at the plug and seat extends the service life, e.g. with contaminated media.

Screwed seat ring provides added flexibility. Up to 5 different Kvs values.

Parabolic plug – high control performance combined with excellent resistance to dirt.

Quieter operation owing to the perforated plug; the additional guide in the seat enables increased stability.

User-friendly, easy-to-maintain coupling between the final control element and the actuator. The actuator can be mounted and removed quickly and aligned according to the installation conditions.

Various stem seal systems allow maintenance-free operation. For example, the stainless steel bellows with a graphite packing as the secondary seal is ideal for heat transfer systems using organic heat transfer media as per DIN 4754-1.

Benefits

Safe – Proven, maintenance-free stem seals, extended service life owing to the optimised valve lift
Economical – Compact dimensions and high control performance
Reliable – Feature options and accessories for a wide range of applications
Durable – Optional coatings for the final control element if used in critical environments
Independent – Electric and pneumatic actuators developed / manufactured in-house for maximum flexibility and autonomy
User-friendly – Combination of a final control element and actuator with documentation of relevant data, e.g. closing pressure
Modern – Digital actuators and positioners ensure easy start-up owing to quick initialisation
Efficient – Economical BLDC motors and digital electropneumatic positioners save energy owing to the low power or air consumption
Simple – NAMUR mounting for electropneumatic positioners – internationally recognised
Accepted – Digital positioners made by SIEMENS: either compact and straightforward with PS100 or variable and versatile with PS2
Versatile – Other electropneumatic positioners from several different manufacturers available on request
Globally available – ARI is directly represented, or has partners, in many countries

ARI-PREMIO -Plus 2G Smart actuator

3-point and 4-20mA / 0-10V control (integrated positioner)
Easy operation and start-up
Speed control
Economy function
Diagnostic functions
Compatible with the myPREMIO app

ARI myPREMIO – the new ARI app for controlling and evaluating the PREMIO-Plus actuator. In addition to the Bluetooth interface, the communications package which is required in order to use the app also includes the status LEDs and analogue feedback

Actuator control
Start-up
Diagnostics
Settings
Data exchange

ARI-DP – Single-acting pneumatic actuator

Robust design
Various sizes; as much actuating force as necessary, as little air consumption as necessary
Long service life

Optional: Digital positioners
e.g. Siemens Sipart PS100 or ARI STEVI-POS
Benefits:

Rapid (one-touch) start-up
Easy setting
Rugged body
Compact dimensions
Low air consumption

Profit from the diversity of the STEVI^® range

STEVI^® Pro: The high-performance control valve for demanding and critical applications (Series 470/471)
(e.g. cavitation, flashing, high noise levels, aggressive environments, etc.)

STEVI^® Vario

Complete solution, endless possibilities

The STEVI Vario is a variable, compact control valve for universal applications. It is based on a modular system, which means that the configuration is adaptable to the task at hand.

Faster selection owing to ARI-myValve^®, the user-friendly sizing and selection software

Short delivery times owing to advanced production, assembly and testing processes (e.g. 48 h for defined standard versions)

Perfect fit, even in tight spaces, owing to the lower height – up to 25% smaller*

Easy handling owing to the reduced weight – up to 25% lighter*

Maximum flexibility because the actuators can be turned 360°

Benefits

Profit from the diversity of the STEVI^® range

STEVI^® Pro: The high-performance control valve for demanding and critical applications (Series 470/471)
(e.g. cavitation, flashing, high noise levels, aggressive environments, etc.)

STEVI^® Vario: the new variable, compact control valve in 100,000 variants (Series 448/449).
Standard versions shipped within 48 hours!

STEVI^® Smart: The classic standard valve for universal applications (Series 440/441)

Download and contact

Download more information on our extensive STEVI range here or contact us without obligation.

STEVI® Vario

Complete solution, endless possibilities

The STEVI Vario is a variable, compact control valve for universal applications. It is based on a modular system, which means that the configuration is adaptable to the task at hand.

Faster selection owing to ARI-myValve®, the user-friendly sizing and selection software

Short delivery times owing to advanced production, assembly and testing processes (e.g. 48 h for defined standard versions)

Perfect fit, even in tight spaces, owing to the lower height – up to 25% smaller*

Easy handling owing to the reduced weight – up to 25% lighter*

Maximum flexibility because the actuators can be turned 360°

Benefits

Profit from the diversity of the STEVI® range

STEVI® Pro: The high-performance control valve for demanding and critical applications (Series 470/471) (e.g. cavitation, flashing, high noise levels, aggressive environments, etc.)

STEVI® Vario: the new variable, compact control valve in 100,000 variants (Series 448/449). Standard versions shipped within 48 hours!

STEVI® Smart: The classic standard valve for universal applications (Series 440/441)

Download and contact

Download more information on our extensive STEVI range here or contact us without obligation.

STEVI^® Vario

Faster selection owing to ARI-myValve^®, the user-friendly sizing and selection software

Profit from the diversity of the STEVI^® range

STEVI^® Pro: The high-performance control valve for demanding and critical applications (Series 470/471)
(e.g. cavitation, flashing, high noise levels, aggressive environments, etc.)

STEVI^® Vario: the new variable, compact control valve in 100,000 variants (Series 448/449).
Standard versions shipped within 48 hours!

STEVI^® Smart: The classic standard valve for universal applications (Series 440/441)