The ARI-EURO-WEDI from ARI-Armaturen is a soft-seated shut-off valve with throttle characteristic that releases or shuts off the volume flow in the system. ARI offers the EURO-WEDI in different versions. The flanged design is available in FTF-14 (short design) / FTF-1 (long design) and the threaded design in the length FTF-14 (short design). The material for all versions is grey cast iron (5.1301). The EURO-WEDI, flange connection, is available in pressure ranges PN 6 and 16, threded connection in pressure range PN 16. The nominal diameter are DN15-200 (flange connection), DN15-50 (1/2‘-2’) (threaded connection). The temperature range is from -10°C to +120°C (briefly up to +130°C).

The fully encapsulated EPDM cone has an almost linear flow characteristic (throttle characteristic). Thanks to the self-centring throttling plug (dual function of shutt-off and throttling). The EURO-WEDI is absolutely reliable in terms of tight shut-off (leakage rate A according to DIN EN 12266). Our patented elastic double seal (EDD), combined the stem sealing c/w a scraper. The scraper removes any deposits from the spindle surface and guarantees tightness to athmosphere. In addition the encased EPDM plug relieves the stem seal (back seat) in fully open position.

Thanks to the internal stroke limiter (lower installation height), the locking device, the non-rising handwheel and the position indicator as standard device, the EURO-WEDI achieves ideal handling, even in space limited assembling areas.

The durability of the valve is important for us. When used in cold water/air conditioning systems, the standard insulating cap with dew point barrier protects against condensation and prevents corrosion on the valve (corrosion protection). The standard anti-rotation device (double-guided plug) and the fine-thread stem (slow immersion of the plug towards the seat = gentle on the material) provides a long service life.

Energy efficiency is becoming increasingly important. The ARI-EURO-WEDI can be fully insulated according to the German Building Energy Law (GEG). Further energy and cost savings result from the favourable zeta values (<= 1.2).

Flow regulating valves ASTRA®

ASTRA®

Static flow regulating valve

• Nominal sizes: DN15-500
• Pressure ratings: PN16
• Temperature range: -10-120°C (briefly 130°C, DN250-500 to 200°C)
• Material: grey cast iron (EN-JL1040)

• Non-rising handwheel with travel limiter and digital display (DN250-500 travel indicator)
• DN250-500 with V-port plug, seat-guided over the entire stroke
• Integrated pressure gauges as standard, located on the flanges.
• Optional pressure gauge extensions
• Insulating cap with dew point barrier
• Complete insulation possible in accordance with the Gebäudeenergiegesetz - GEG

• Adjustable with the ARImetec-DX measuring device

ASTRA® D

Dynamic flow limiter – for automatic hydraulic balancing of heating, ventilation and air conditioning systems

• Nominal sizes: DN50-800
• Pressure ratings: PN16/25
• Temperature range: -10-110°C
• Material: ductile iron (EN-JS1030)
• Maximum energy savings by limiting the flow regardless of the differential pressure over the valve – thanks to integrated automatic inserts (avoidance of oversupply)
• Cost and energy savings thanks to easy-to-insulate wafer type with a compact overall length of 170mm of all nominal sizes.
• Reduction of operating costs and setting security through firmly defined limitation of the volume flow (no manual readjustment, no complicated installation since inserts are set in the factory)
• Complete insulation possible in accordance with the Gebäudeenergiegesetz - GEG
• Integrated pressure gauges as standard

ASTRA® DC

Pressure independent control valve

• Nominal sizes: DN50-150
• Pressure ratings: PN16/25
• Temperature range: 0-120°C
• Material: grey cast iron (EN-JL1040) / nodular iron (EN-JS1024)

• Consists of an adjustable volume flow controller, a differential pressure controller and a modulating control valve - for maximum energy efficiency under changing conditions (with electric actuator or handwheel)
• Perfect control of the system through fully modulating control with full valve authority and maximized ΔT - regardless of any fluctuations in the systems differential pressure
• Cost savings as no additional control valves are required in the system (reduction in the total number of valves due to the combined 3-in-1 design)

• Integrated pressure gauges as standard

ZEDOX® HEXO

Double offset butterfly valve

• Fully lugged type: DN80-800
• Wafer type: DN80-800
• Double flanged: DN200-1400
• Butt weld ends: DN200-1600
• Pressure ratings: PN10-40
• Materials: cast carbon steel (1.0619+N) / cast stainless steel (1.4408)

• Functional safety even under challenging operating conditions (reliably tight at temperatures from -40°C to +260°C, PN 10 to PN 40 as well as ANSI Class 150)
• By reducing the contact pressure and minimizing friction, ZEDOX® HEXO offers a long service life
• The streamlined bearing and shape of the valve disc stands for a high-energy efficiency
• The protection of the seat-sealing ring against the influence of negative medium flow creates a long service-life of the ZEDOX® HEXO
• The low torques guarantees a perfect handling
• Easily automated via actuation interface acc. to ISO 5211
• ZEDOX® HEXO accomplishes leakage rate A acc. to EN 12266, API 598 (bi-directional), soft-sealing (type TS), metallic sealing (type CS) with leakage rate B
• Blow-out proof shaft provides extra safety 

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STEVI®-H

Control valve for HVAC applications

• As straight through or 3-way mixing valve
• With threaded joint or flanges
• Nominal sizes: DN15-250 / ½"-2"
• Pressure ratings: PN6/16
• Temperature range: -10-120°C
• Material: gunmetal (CC499K) / grey cast iron (EN-JL1040)

• Paths A and B tightly closing (leakage rate A according to DIN EN 12266-1)
• Threaded joint including screw connections
• Choice of electric actuators

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ENCOsys®

Heat exchanger systems

With energy-efficient steam pressure control for heating systems or fast steam-side control for process applications

ARI-ENCOsys® systems are built on a stainless steel frame. The safety devices which DIN EN 12828 requires (or acc. to country regulations) to be installed in heat generating systems are selected and integrated according to the system’s heat capacity. The use of smart control technology ensures that the upstream flow temperature is maintained at precisely the set value. When a safety component trips, the primary energy is reliably shut off and the system is transferred to an operationally safe condition. The heat capacity, materials to be used, design of control valves, etc. are individually adjusted to the local condition according to the customers application.

If necessary, the systems are equipped with actuators in acc. with DIN EN 14597 (temperature control devices and temperature limiters for heat generating systems).

Energy-efficient condensate accumulation control for heating systems

The heat transfer process is achieved using a vertical, high-performance shell-and-tube heat exchanger. It is controlled by a control valve on the primary side (condensate outlet from the heat exchanger). The control valve regulates the level of condensate in the vertical heat exchanger. The condensate level in the heat exchanger rises or falls depending on the system load case. This ensures a precise upstream temperature on the secondary side.

• Energy-efficient solution
• CO2 reduction through up to 15% less steam consumption
• No flash steam– no water hammer!
• Compact design

Fast steam-side power control for process applications and heating systems

The heat transfer process is realised by a horizontal highperformance shell-and-tube heat exchanger. It is regulated by a control valve on the primary side (steam inlet to the heat exchanger). This system is ideal for applications with low hysteresis and discontinuous processes with rapid load changes.

- Fast reaction to load changes (discontinuous processes)

- Efficient control for processes

- Robust and operationally reliable design thanks to shelland-tube heat exchanger