ARI Armaturen is one of the leading manufacturers of industrial valves and system solutions for liquid and gaseous media. As a valve manufacturer, we have been working in partnership with ARI for many years and offer you the complete portfolio – from standard valves to individual special solutions. We provide you with manufacturer-independent advice, modify valves according to your requirements and supply complete systems from a single source.
For safe shut-off in piping systems – robust, durable and easy to maintain.
Precise control of flow, pressure and temperature in demanding processes.
Protection of systems and processes against overpressure – certified and reliable.
Versatile use for numerous media and operating conditions.
Efficient drainage
and filtration for steam and condensate systems.
Pneumatic and electric actuators, limit switches, solenoid valves and accessories – for the efficient automation of your processes.
PRESO 753 as an overflow valve with four spring ranges from 0.5 to 10 bar.
PREDEX 705 with bellows in DN 15 to DN 40 – the stem is hermetically sealed.
Cast steel 1.0619+N for steam and hot water lines up to PN 40.
Grey cast iron EN-JL1040 and ductile iron EN-JS1049 for supply and circulation systems.
Versions in stainless steel 1.4408 and 1.4581, internals in 1.4571.
Five actuator sizes from UDA 40 to UDA 400, field-interchangeable.
Grey cast iron EN-JL1040, ductile iron EN-JS1049, cast steel 1.0619+N as well as stainless steel 1.4408 and 1.4581.
The overflow regulator PREDEX 705 is available in PN 16, PN 25 and PN 40, in DN 15 to DN 150.
Spring plate and travel limitation ring in X6CrNiMoTi17-12-2, material number 1.4571.
PRESO 753 with four spring ranges from 0.5 to 10 bar, PREDEX 705 with an inlet pressure setpoint of 0.2 to 16 bar g.
Five actuator sizes from UDA 40 to UDA 400 and three spring sizes, field-interchangeable.
The PREDEX 705 is available in DN 15 to DN 40 with a bellows for hermetic stem sealing.
We trade in ARI valves and supply from the manufacturer range. Unlike with some brands, the following applies here expressly: we source the complete ARI range – including series not listed on this page. The two series listed below are recommendations from our catalogue, not a limit on what we can supply. Enquire with the figure number, nominal size and operating data.
ARI divides its range into six areas. Every series within them can be sourced through us:
| Area | Product groups | Series |
| Control | control valves, HVAC valves, pressure reducing valves, overflow regulators, overflow valves, temperature regulators | STEVI (control valves, also as STEVI Vario and STEVI Pro), STEVI-POS as an electropneumatic positioner, PRESO as an overflow valve, PREDEX as an overflow regulator |
| Shut-off | manual shut-off valves, balancing valves, butterfly valves, check valves, strainers | FABA as a bellows-sealed valve; butterfly valves soft-seated as ZESA, GESA and ZIVA, metal-seated as ZETRIX, in high-performance design as ZEDOX |
| Condensate removal | steam traps, accessories for steam applications, condensate collectors and steam distributors | CONA |
| Safety | safety valves | – |
| Actuators | pneumatic P actuators, electric E actuators | – |
| Systems | system solutions and assemblies | – |
We list these two series with a data sheet because they are the most frequently requested in practice. Both regulate without auxiliary power.
| Series | Function | Nominal size | Pressure rating | Setpoint | Features |
| PRESO Fig 753 | overflow valve, spring-controlled | DN 15 – 100 | PN 16 | four spring ranges: 0.5 – 1.5 · 1.0 – 3.0 · 2.0 – 5.0 · 4.0 – 10.0 bar | internals in X6CrNiMoTi17-12-2 (1.4571), travel limiting ring from DN 40 in 1.4571; body in grey cast iron, ductile iron, cast steel or stainless steel depending on figure number |
| PREDEX Fig 705 | overflow regulator, straight pattern, with UDA rolling diaphragm actuator | DN 15 – 150 | PN 16, PN 25 and PN 40 | inlet pressure setpoint range 0.2 – 16 bar g, independent of nominal size | five interchangeable actuator sizes UDA 40 to UDA 400 and three spring sizes; plug in DN 15 – 32 and DN 40 – 150; bellows version in DN 15 – 40; Kvs values from 3.2 to 280 m³/h, reduced on request; actuator in grey cast iron, stainless steel actuator available |
With ARI, half the ordering information is in the figure number: the number before the dot denotes the body material and pressure rating, the number after the dot the series. This can be read off the overflow regulator 705:
| Figure | Body material | Pressure rating |
| 12.705 | grey cast iron EN-JL1040 | PN 16 |
| 22.705 / 23.705 | ductile iron EN-JS1049 | PN 16 / PN 25 |
| 34.705 / 35.705 | cast steel 1.0619+N | PN 25 / PN 40 |
| 62.705 / 65.705 | stainless steel 1.4581 | PN 16 / PN 40 |
On the overflow valve 753 the system follows the same pattern: 12.753 in grey cast iron EN-JL1040, 22.753 in ductile iron EN-JS1049, 32.753 in cast steel 1.0619+N and 52.753 in stainless steel 1.4408 – all in PN 16 and DN 15 to 100. If you know the figure number from an existing plant, that alone is enough for an enquiry.
As a rule we supply the series version from the ARI range. Additionally feasible with ARI:
Yes, we offer modifications such as special materials, automation, heating jackets and ATEX versions.
For almost all industrial applications – from chemicals and energy to food and water technology.
Yes, on request as an assembly – the standard case is supply of the series version.
We first review the operating data, materials and connection dimensions, then select the appropriate version from the ARI Armaturen range. On request we add accessories and documentation.
Because ARI offers a continuous range from control valves through butterfly valves to steam traps – and because of our many years of experience as a partner.
