Product Overview
The SIRCA AP01S08BH2BIS is a precision-engineered pneumatic rotary actuator from the SIRCA AP series, designed to deliver reliable quarter-turn (90°) valve actuation in demanding industrial process environments. Operating on a rack-and-pinion working principle, this double-acting actuator converts compressed air pressure into controlled rotary torque, providing smooth and accurate positioning of ball, butterfly, and plug valves. The AP01S08BH2BIS is a compact, high-cycle unit suited for automated process control loops where consistent torque output, fast response, and long service life are critical. Its robust anodized aluminum housing and precision-machined internal components make it an ideal choice for integration into pneumatic valve assemblies across chemical, petrochemical, water treatment, and general industrial fluid handling systems.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Pneumatic Rotary Actuator (Quarter-Turn Valve Actuator) |
| Model Designation | AP01S08BH2BIS |
| Manufacturer | SIRCA |
| Actuation Principle | Rack-and-Pinion, Double-Acting Pneumatic |
| Rotation Angle | 90° (Quarter-Turn), adjustable via mechanical stops |
| Operating Pressure | Standard Industrial Grade (typically 2 – 8 bar / up to 120 psi) |
| Mounting & Connection | Standard ISO 5211 Valve Mounting Interface / Namur Air Port Interface |
| Housing Material | Anodized Aluminum Alloy, Corrosion-Resistant |
| Sealing | NBR / Buna-N O-Rings and Lip Seals |
Engineering Features & Advantages
- Precision Quarter-Turn Actuation: Rack-and-pinion mechanism delivers accurate 90° rotation with minimal backlash, ensuring precise valve positioning and repeatable process control.
- Dual-Acting Torque Output: Double-acting pneumatic design provides consistent torque in both open and close directions, eliminating the need for spring return and enabling full bidirectional control.
- Compact & Lightweight Construction: Anodized aluminum housing reduces overall weight while maintaining structural rigidity for high-cycle industrial duty.
- Standardized Interface Compatibility: ISO 5211 mounting pattern and Namur air port configuration allow direct bolt-on integration with standard valves and solenoid pilot valves without adapters.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with low-friction bearings and wear-resistant seals extending service intervals.
- Direct Fit Replacement: Precision-manufactured to original SIRCA specifications for direct replacement, minimising downtime and eliminating fitment issues.
Typical Industrial Applications
The AP01S08BH2BIS is a compact, high-cycle unit suited for automated process control loops where consistent torque output, fast response, and long service life are critical.
PRODUCT IMAGES


SIRCA AP01S08BH2BIS Pneumatic Rotary Actuator
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- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
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- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine SIRCA AP01S08BH2BIS Solenoid Directional Valve. This Italy-made 24V DC hydraulic component features a 2-way normally closed design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.