Valbia | Pneumatic Actuators
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The possibility to use various types of construction materials and combinations, makes Valbia actuators versatile and suitable to different applications and operating environments; the certifications, achieved by the products, allow the usage in all the major industrial sectors (from food & beverage to the O&G market), both in European and International contest. Valbia is able to propose the most suitable solution according to the different requirements of use and to provide also a wide range of accessories such as solenoid valves, limit switches, positioners, emergency gear operators and levers for manual intervention.
Features:
- Double Acting and Spring Return.
- DA 8 Nm - 2,869 Nm (5.5 bar air)
- ISO mounting with Namur Solenoid Valve mount.
- Pressure rating max 8 bar.
- Temperature std (-20 Deg C - +85 Deg C).
- Pre lubricated for life of actuator on assembly.
- Fully tested on manufacture.
- Die Cast Aluminium end caps.
- Spring sets to suit different Air Pressures / Torque requirements.
The Valbia Pneumatic Actuator comes with a standard 5 Degrees rotation adjustmen in both clockwise and counter-clockwise direction by means of adjusting screws outside the air supply chambers.Options:
Double Acting
Spring Return
Solenoid Controlled
Limit Switches
Open / Closing speed control (prevents water hammer).
The Valbia Pneumatic Actuators can be supplied coupled to Butterfly and Ball Valves.
| Specification | 1 – BODY MANUFACTURED FROM EXTRUDED ALUMINIUM UNI 6060 Hard-coat anodized as standard finish 45-50 (micron). Good wear resistance. High corrosion resistance. Special finishes nickel-plating or P.T.F.E coated for corrosive environments upon request. Bore finished to high standard to ensure low friction and lon life. 2 – CONCENTRING SPRING SETS Standard coating painted. High resistance and reliability. Spring sets to suit different air pressure/torque requirements. Long securing screws to allow safe dismantling for maintenance. Same body dimensions for DA/SR versions. 3 – DIE CAST ALUMINIUM END CAPS Standard polyester powder coated. Special finishes nickel-plating or P.T.F.E coated for corrosive environments upon request. 4 – ASSEMBLING SCREWS Stainless steel as standard. 5 – PINION MADE IN STEEL Nickel-plated against internal and external corrosion for standard version. Stainless steel upon request. Anti-blowout design. 6 – CAM FOR LIMIT POSITION ADJUSTMENT 0°-90° Stainless steel. Adjustment for open and close position ± 5°. 7 – 0-90° ADJUSTMENT SCREWS Stainless steel. 8 – PISTON GUIDES IN POM Large contact area. Low friction for self lubricating material. Long life. 9 – PISTONS MADE FROM DIE CAST ALUMINIUM Chemical nickel-plating upon request. 10 – SEALS Standard version: NBR. High temperature version: Viton. Low temperature version: silicone. TWIN RACK AND PINION DESIGN Constant torque output. Compact design. Balanced internal forces. Robust design to ensure long life. NOMINAL VALUES Pressure rating max 8 bar. Working temperature: standard (-20°C; +85°C), high (-20°C; +150°C), low (-40°C; +85°C). Lubrification guaranteed for the entire actuator lifetime. 100% fully tested on manufacture. EXTERNAL CONNECTION Top of pinion according to Namur norm. Solenoid valve connection according to Namur norm. Bottom of pinion according to ISO 5211-DIN 3337. PATENTED The pneumatic actuator has a patented solution for the cam and the double adjustment stop bolts chamber. Such area is separated from the pistons chamber, and it is not subject to pressure containing, contrary to our competitors’ products. This solution reduces the eventual leaking points and it enables better performances and long-term reliability of our actuators. |
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