Aluminum Alloy Pneumatic Actuator Quarter Turn

Universal Star-Drive Shaft Interface

The drive shaft features an integrated star-drive design to accept parallel square, diagonal square, and double square stems without component changes. This single shaft pattern reduces inventory overhead across projects with varying valve stem configurations. The anti-blowout shaft design integrates internal bearing guides to stabilize rotation and extend service life.

Top Adapter with Integrated Position Indicator
The top aluminum alloy adapter links the drive shaft to NAMUR accessories and supports the visual position indicator. You can change the indicator orientation by rotating the top adapter 90 degrees. This adjustment is done in the field without disassembling the actuator body.

Composite Bearings and Wide Guide Rings

The piston and rack assembly features low-friction composite bearings for smooth travel. Wide piston guide rings prevent metal-on-metal contact and absorb side-loads. This keeps the O-ring free from mechanical wear, allowing it to function purely as a seal. This setup extends seal and bearing life in high-cycle operations.

Pre-Coated Spring Cartridge

Spring return models feature pre-assembled spring cartridges with coated steel springs. The protective coating prevents corrosion from internal condensation and reduces material fatigue. This modular cartridge design allows easy spring configuration changes to match specific valve torque needs.

Nickel-Plated Drive Shaft

The steel drive shaft is heavy nickel-plated for high corrosion resistance. The anti-blowout structure and internal bearing guides prevent shaft deflection under heavy loads. This design eliminates premature shaft failure during high-cycle or high-torque operations.

Precision Gear Machining — Minimal Backlash

The piston rack and drive pinion are precision machined for tight tooth engagement. Minimal backlash ensures the actuator position closely tracks the control signal. This precision is required for modulating services where positioning directly impacts flow control quality.

Wide Temperature Range Seals

Standard NBR seals operate from –20°C to +80°C. Low-temperature configurations extend down to –50°C, while high-temperature Viton variants withstand up to +160°C. Please specify your operating temperature when ordering.

ISO 5211 / NAMUR Direct Mounting

The bottom mounting flange complies with ISO 5211 to fit standard ball and butterfly valves directly without brackets. The air ports and top mounting faces follow NAMUR standards (VDI/VDE 3845) for the direct installation of limit switch boxes, positioners, and solenoid valves.

Applications

Standard Ball and Butterfly Valve Automation (90°)

The HAT Series aluminum alloy pneumatic actuator operates standard 90-degree ball valves and butterfly valves. The common-body design allows you to use the same actuator size for both double acting and spring return duties, reducing part numbers and simplifying inventory.

Y-Port Diverting Valves (120°)

The 120-degree stroke variant drives Y-port three-way diverting valves directly. This eliminates the need for external linkage assemblies required by standard 90-degree actuators.

Multi-Port Mixing Valves (135° / 180°)

Customized rotation angles up to 180 degrees automate multi-port mixing valves that require a full half-turn stroke. The rack and pinion design ensures constant torque output throughout the entire travel.

Three-Position Process Control

The three-position actuator uses an internal mechanical stop to achieve three discrete positions (0°, mid-stop, and full stroke) within a single unit. It is available in both double acting and spring return configurations for 90-degree and 180-degree duties, ideal for dosing, batching, and multi-port filling systems.

FAIL-MIN Applications (180° SR)

The FAIL-MIN function on the 180-degree spring return variant drives the valve to a minimum position rather than fully closed upon air failure. This setup prevents process hazards caused by complete valve closure during air loss.

High-Cycle Industrial Duties

Featuring composite bearings, wide piston guide rings, a hard-anodized cylinder bore, and pre-coated springs, the HAT Series handles high-cycle automation where continuous mechanical wear limits standard actuator life.

Industries Served： Oil & Gas · Chemical Processing · Power Generation · Water & Wastewater Treatment · Pulp & Paper · Food Processing · Pharmaceuticals · Mining · General Industrial Automation

Quality Assurance and Certifications

Factory testing protocols:Every HAT Series aluminum alloy quarter turn pneumatic actuator undergoes factory testing prior to shipment. Standard protocols include pressure leakage tests, dynamic torque verification, and stroke angle precision checks. These procedures confirm mechanical performance and positional accuracy under pressure.

Project certifications: The HAT Series carries ISO 9001, IP67, CE, ATEX, SIL3, and EAC certifications. These approvals meet international safety and legal standards for direct integration into global industrial projects and hazardous area installations.

Optional Accessories Available

Solenoid valve · Limit switch box · Electro-pneumatic positioner · Manual override gearbox · Air filter regulator