Valbia manufactures rack and pinion pneumatic actuators, available in spring return or double acting version,
with 0°-90° standard rotation or 0°-180°. This type of actuator is mainly used in industrial processes, to
automate interception and adjustment devices.
Using carefully selected materials, Valbia offers a product with a unique patented design, which is able to
guarantee high quality standard, performance and strong reliability throughout its useful life.
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.
Three series of pneumatic actuators are realized:
• the Series 82, aluminum with 0°-90° rotation;
• the Series 83, aluminum with 0°-180° rotation;
• the Series 84, stainless steel with 0°-90° rotation.
In addition to the standard versions, Valbia offers a wide range of special versions designed to provide
specific solutions for any need.
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.
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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.
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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.
ANTI-BLOWOUT SYSTEM MOUNTING VARIATIONS
Piston
provided with
anti-blowout
flat ke.
Closed Open
Counterclockwise Rotation
Clockwise Rotation
View from the top of the pinion

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