✅ Reversible pneumatic actuator with rolling diaphragm (max. air supply pressure: 6 bar)
✅ Electric actuators with manual override and torque switches
✅ Multiple plug designs, including perforated plugs for noise reduction
✅ Available in nominal pressure ratings PN16, PN25, and PN40
✅ Leakage class IV – VI compliance (DIN EN 60534-4)
✅ Explosion-proof electric actuator versions available (ATEX-certified)
Technical Specifications
Valve Types & Configurations
- ARI-STEVI® 470 – Control valve with standard sealing options
- ARI-STEVI® 471 – Control valve with stainless steel bellows for high-temperature applications
Material Options
| Model | Nominal Pressure | Material | Nominal Diameter (DN) |
|---|---|---|---|
| 22.470 / 22.471 | PN16 | EN-JS1049 | DN15-150 |
| 23.470 / 23.471 | PN25 | EN-JS1049 | DN15-150 |
| 34.470 / 34.471 | PN25 | 1.0619+N | DN15-150 |
| 35.470 / 35.471 | PN40 | 1.0619+N | DN15-150 |
| 54.470 / 54.471 | PN25 | 1.4581 | DN15-150 |
| 55.470 / 55.471 | PN40 | 1.4581 | DN15-150 |
Other materials and custom versions available upon request.
Stem Sealing Options
| Model | Standard Sealing | Optional Sealing |
|---|---|---|
| 470 (DN15-150) | PTFE-V-ring unit (-10°C to 220°C) | Pure graphite packing (-10°C to 450°C) |
| 470 (DN15-150) | EPDM sealing (-10°C to 150°C, suitable for water & steam up to 180°C) | -- |
| 471 (DN15-150) | Stainless steel bellows with graphite (-60°C to 450°C) | Stainless steel bellows with EPDM sealing (-60°C to 150°C, suitable for water & steam up to 180°C) |
Pressure & Temperature Ratings
| Material | PN Rating | Temperature Range | Max Operating Pressure |
|---|---|---|---|
| EN-JS1049 | PN16 | -10°C to 120°C | 16 bar |
| EN-JS1049 | PN25 | -10°C to 250°C | 25 bar |
| 1.0619+N | PN25 | -60°C to 450°C | 25 bar |
| 1.0619+N | PN40 | -60°C to 450°C | 40 bar |
| 1.4581 | PN25 | -60°C to 450°C | 25 bar |
| 1.4581 | PN40 | -60°C to 450°C | 40 bar |
Plug Designs & Flow Performance
- Parabolic plug with metal seat (standard) – Leakage Class IV (DIN EN 60534-4)
- Parabolic plug with PTFE-soft seal (max 200°C) – Leakage Class VI
- Perforated plug for noise reduction (optional) – Ideal for gases and steam
- Pressure-balanced plug with metal seat – Includes PTFE piston seal with stainless steel spring (max 200°C)
- V-port plug with metal seat – Leakage Class IV (DIN EN 60534-4)
| DN (Size) | Kvs Value (m³/h) |
|---|---|
| DN15 | 0.1 - 4 |
| DN20 | 0.4 - 6.3 |
| DN25 | 1 - 10 |
| DN32 | 1.6 - 16 |
| DN40 | 2.5 - 25 |
| DN50 | 4 - 40 |
| DN65 | 6.3 - 63 |
| DN80 | 10 - 100 |
| DN100 | 16 - 160 |
| DN125 | 25 - 250 |
| DN150 | 40 - 400 |
Actuation Options
Pneumatic Actuator – ARI-DP 32 - 35
- Max Air Supply Pressure: 6 bar
- Spring-opening or spring-closing function
- Handwheel for manual operation available (optional)
Electric Actuator – ARI-PREMIO 2,2 - 25 kN / PREMIO-Plus 2G
- Digital actuator control with torque switches
- Protection Class: IP65
- Handwheel for emergency operation
- Additional accessories available (e.g., potentiometer)
- Explosion-proof versions available (ATEX-certified)
Electric Actuator – AUMA SAR 07.2 - 14.6
- Protection Class: IP67
- Integrated torque and travel switches
- Handwheel for emergency operation
- Overheating protection for the motor as standard
- Explosion-proof version available upon request
