Stainless Steel Pneumatic Actuators

Transform your facility's fluid management infrastructure with our meticulously engineered stainless steel pneumatic actuators. From the moment you handle the unit, the substantial weight and impeccably smooth, hard-anodized extruded aluminum alloy cylinder body convey a profound sense of industrial craftsmanship. Designed to conquer the most unforgiving operational environments, these actuators operate with a distinct, quiet mechanical efficiency—a direct testament to the precision-machined internal bores and composite bearings that virtually eliminate harsh metal-on-metal friction. Whether your daily operations involve caustic chemical processing, high-humidity marine applications, or rigorous sanitary wash-downs, the resilient 304/316 stainless steel external fasteners and optional Teflon-coated surfaces stand as an impenetrable barrier against aggressive corrosion. By delivering a swift, highly responsive reaction to your control signals, this actuator ensures your critical valves open and close with absolute certainty. This unwavering performance safeguards your process integrity, optimizes flow control precision, and dramatically reduces unexpected downtime and maintenance overhead for your entire facility.

Product Specifications

①dual piston rack and pinion design of symmetric structures, rapid and smooth movement, high precision, high output power by a simple change in the direction of the piston assembly positions available anti-rotation.

②high quality extruded aluminum alloy cylinder block, by precision machining the hole and the external surface of hard anodized (anodic oxidation under special circumstances +Teflon coating), longer life, low friction coefficient.

③integrated design, all the double acting and singlefunction actuator models have the same cylinder and end caps, easily removed by installing a spring or spring to change the mode of action

④combined pre-spring break Hean whole group, whether in the assembly process or use on-site in both convenient and safe to install or change

⑤the external side of the two single independent adjustment screw has been number of springs. installed in the valve for the actuator is precisely to facilitate, control valve open and

valve closed position, For the whole trip conditioned office is also configured in two cover a longer adjustment screws.

⑥multi-position indicator, on-site visual instructions, consistent with VDI/VDE3845, NAMUR standard slot, the output can be installed and all the accessories, such as limit switch box, electric positioner, position sensor (Pepperl and Fuchs, Turck).

⑦gas source interface line NAMURstandard, direct safety plaquesNAMUR standard solenoid valve.

⑧rack on the back of the composite bearing and piston guide ring and the output shaft bearings to prevent metal on metal friction and increasing lubrication, so a low friction,

long life.

⑨All fasteners are stainless steel, long-term corrosion resistance.

⑩connection part of the line with new international standardISO5211,DIN3337 (F03-F25)makes products with interchangeable, versatile.

Key Features & Highlights

Our pneumatic actuators are designed not just to meet industry expectations, but to redefine them. Every internal component and external finish has been optimized to solve common operational challenges, ensuring your automated valve systems run flawlessly.

• Integrated Design Architecture: Both double-acting and single-acting function models utilize the exact same cylinder and end caps. You can easily change the mode of action on-site simply by installing or removing the internal springs.

• Pre-Loaded Safe Spring Groups: The combined pre-spring break whole group design ensures that whether during the factory assembly process or on-site maintenance, installing or changing springs is exceptionally convenient and entirely safe for your technicians.

• Multi-Position Visual Indicator: Features an on-site visual indicator consistent with VDI/VDE3845 standards. The NAMUR standard slot allows for the seamless installation of all necessary accessories, including limit switch boxes, electric positioners, and top-tier position sensors.

• Anti-Friction Engineering: The back of the rack features a composite bearing, paired with a piston guide ring and output shaft bearings. This strategic placement prevents metal-on-metal friction, significantly increasing lubrication retention and extending the overall lifecycle.

Core Material & Anti-Corrosion Process

When sourcing equipment for severe industrial environments, material integrity is the ultimate deciding factor for long-term viability. Our actuators are forged with an uncompromising focus on metallurgical excellence to prevent premature failure caused by environmental degradation.

• Premium Stainless Steel Fasteners: All external fasteners, screws, and critical exposed components are manufactured from ALODUR 304/316 stainless steel, offering an impenetrable defense against rust and chemical pitting.

• Hard-Anodized Extruded Aluminum: The high-quality aluminum alloy cylinder body is precision-squeezed. Both the inner hole and external surface undergo a rigorous hard anodic oxidation treatment, creating a flawless, wear-resistant barrier.

• Optional Teflon (PTFE) Coating: For the most extreme caustic environments, we offer a specialized anodic oxidation combined with a special fluorocarbon (Teflon) coating, exponentially lowering the friction coefficient and extending operational life.

Structural Design & Operational Precision

Precision in fluid control translates directly to product quality and operational safety. We have engineered the internal mechanics of this actuator to provide exact, repeatable movements that procurement and engineering teams can rely on implicitly.

• Symmetric Dual-Piston Rack and Pinion: This advanced design ensures rapid, incredibly smooth movement with high precision and high output power. Simply reversing the piston assembly positions changes the direction of rotation instantly.

• Independent Stroke Adjustment: We have set up two independent adjustment screws on the external side. This allows operators to accurately regulate the valve opening and closing locations with a precise ±5° switch angle adjustment, ensuring exact flow control.

• Inventory Optimization: Because the integrated design allows the same body to serve as both single and double-acting units, facility managers can drastically reduce their spare parts inventory and associated storage costs.

International Standards & Accessory Compatibility

Integration should never be a bottleneck in your facility upgrades. We have strictly adhered to global dimensional and interface standards, ensuring that our actuators drop perfectly into your existing automated pipeline architecture without the need for custom fabrication.

• Universal Valve Mounting: The bottom connection part perfectly aligns with the new international standards ISO5211 and DIN3337 (F03-F25), making the product highly interchangeable and versatile across thousands of valve brands.

• Direct Accessory Integration: The gas source interface line completely conforms to the NAMUR standard. This allows for the direct, secure mounting of NAMUR standard solenoid valves and safety plaques without requiring cumbersome transitional brackets.

• Top-Mount Standardization: The top pinion output is standardized to accept a wide array of feedback devices, seamlessly accommodating industry-standard limit switches and smart positioners to keep your control room fully informed.

High-Cycle Operation & Service Life

Industrial automation demands components that can cycle thousands of times a day without degradation. We have eliminated the common points of mechanical wear to deliver an actuator that thrives in high-frequency operational scenarios.

• Electroless Nickel-Plated Pinion: The alloy steel pinion shaft is treated with electroless nickel plating (with an SS304 option available), providing exceptional torsional strength and resistance to mechanical fatigue during rapid cycling.

• Advanced Engineering Plastics: By utilizing high-grade engineering plastics for the piston bearings and inner washers, we drastically reduce the internal friction coefficient, ensuring the actuator glides silently and efficiently through every stroke.

• Anti-Blowout Safety: The robust internal architecture features a secure travel stop and precise O-ring placements (utilizing premium NBR), preventing pressure blowouts and maintaining absolute seal integrity over millions of cycles.

Extreme Conditions & Environmental Tolerance

Process facilities rarely operate in perfect climates. Your equipment must perform flawlessly whether subjected to freezing outdoor temperatures, intense radiant heat, or fluctuating pneumatic supply pressures. Our actuators are built for exactly these extremes.

• Broad Temperature Resilience: Engineered to maintain perfect sealing and mechanical fluidity in temperatures ranging from a freezing -50°C up to a blistering 120°C, ensuring uninterrupted operation across diverse geographic climates.

• Massive Torque Output: Despite its compact footprint (""Small molds, Large torque""), the double-acting configuration can generate an immense output torque of up to 8000Nm, effortlessly driving large-diameter valves through heavy, viscous media.

• Flexible Air Supply Accommodation: Designed to operate efficiently on an air supply ranging from 2.5 bar to 8 bar, accommodating fluctuations in your plant's compressor network without sacrificing actuation speed or reliability.

Industry Applications & Sanitary Grades

Versatility is the hallmark of superior engineering. While inherently rugged enough for heavy industry, the pristine surface finishes and material purity of our actuators make them equally indispensable for highly regulated, clean-environment sectors.

• Heavy Industrial Dominance: The robust torque and anti-corrosive nature make these units the preferred choice for petroleum refineries, natural gas pipelines, and aggressive chemical processing plants where failure is not an option.

• Sanitary Wash-Down Ready: The extensive use of 304/316 stainless steel and smooth, crevice-free anodized surfaces allows these actuators to withstand the frequent, high-pressure chemical wash-downs required in food, beverage, and pharmaceutical manufacturing.

• Marine and Offshore Reliability: The specialized oxidation and optional Teflon coatings provide the ultimate defense against salt-spray degradation, making them perfect for offshore drilling rigs and marine vessel fluid management.

Quality Certifications & Safety Control

In large-scale industrial procurement, trust is established through verifiable quality and rigorous safety protocols. We do not leave performance to chance; every unit is a product of exhaustive testing and certified manufacturing processes.

• Internationally Recognized Certifications: Our manufacturing facility and products comply with stringent global directives, holding certifications such as CE, ATEX (for explosive atmospheres), SIL-3 reliability, and ISO 9001 quality management.

• 100% Pre-Shipment Inspection: Every single actuator undergoes rigorous pressure testing, torque verification, and leak-detection protocols before it ever leaves our facility. You receive a product that is guaranteed ready for immediate deployment.

• Operator Safety First: The encapsulated, pre-loaded spring design completely neutralizes the risk of kinetic energy release during maintenance, safeguarding your on-site engineering staff from potential injury during disassembly.

Why Choose Us

Partnering with the right manufacturer is as critical as the equipment itself. With over three decades of dedicated manufacturing expertise, our enterprise stands as a pillar of reliability, innovation, and unwavering support for global industrial clients.

• Decades of Manufacturing Excellence: Backed by over 30 years of specialized expertise in fluid automation, we possess the deep technical know-how to solve your most complex valve actuation challenges.

• Comprehensive OEM/ODM Services: We understand that standard off-the-shelf products don't always fit specialized projects. Our robust R&D team provides full customization services, tailoring dimensions, materials, and colors to your exact specifications.

• Global Export Footprint: With our products successfully deployed in over 60 countries, we have mastered the logistics of international compliance, secure packaging, and rapid global delivery to keep your projects on schedule.

• Unmatched After-Sales Support: We uphold the values of Professionalism and Win-Win Cooperation. Our clients benefit from a comprehensive warranty system, 24/7 responsive service, and remote video technical guidance from our senior engineers.

Frequently Asked Questions (FAQ)

To assist procurement managers and site engineers in their evaluation process, we have compiled detailed answers to the most critical technical inquiries regarding our stainless steel pneumatic actuators.

• Q: How do I convert the actuator from double-acting to single-acting (spring return)?
  A: Thanks to our integrated design, the conversion is highly straightforward. You simply remove the end caps, insert the required number of pre-loaded spring groups into the identical cylinder body, and re-secure the caps. No special tools or separate cylinder bodies are required.

• Q: Can the travel stroke of the actuator be precisely adjusted in the field?
  A: Yes. The actuator features two independent external adjustment screws. These allow your technicians to fine-tune both the open and closed valve positions accurately by ±5°, ensuring perfect alignment with your specific valve seating requirements.

• Q: What makes this actuator suitable for highly corrosive environments?
  A: The superior corrosion resistance stems from the use of ALODUR 304/316 stainless steel for all external fasteners and components, combined with a hard-anodized extruded aluminum body. For extreme cases, we also offer a specialized Teflon (PTFE) coating over the anodic oxidation.

• Q: Are these actuators compatible with my existing NAMUR standard solenoid valves?
  A: Absolutely. The gas source interface line is machined to exact NAMUR standards, allowing you to directly mount NAMUR compliant solenoid valves and safety plaques without the need for any intermediary adapter plates.

• Q: What is the maximum output torque I can expect from the double-acting models?
  A: Our extensive range covers cylinder diameters from AT40 up to AT400. In the double-acting configuration, the largest models can deliver a massive output torque of up to 8000 Nm, providing more than enough force to actuate large-diameter industrial valves under high pressure.

Dimensional Drawing