High-thrust linear pneumatic actuators feature rigid shaft alignment for direct valve mounting. This pneumatic linear actuator series manages heavy load control without mechanical binding.
Linear Type Pneumatic Actuator Manufacturer
Your Professional Linear Pneumatic Actuators Manufacturer in China
Hearken manufactures heavy-duty linear pneumatic actuators for valve control. The pneumatic linear actuator delivers thrust up to 2,000,000 N.
Accessory mounting interfaces comply with IEC 60534-6-1 (NAMUR standard for linear valves). This standardized layout ensures universal fit for smart positioners, limit switches, and pneumatic actuator linear feedback devices without custom brackets.
Linear Pneumatic Actuators
Hearken supplies linear pneumatic actuators in single-acting and double-acting types.
Fail-Close Single-Acting Actuator
The pneumatic linear actuator automatically closes the valve upon air or power loss.
Linear Pneumatic Actuators with Multi-Function Modules
Hearken linear pneumatic actuators offer different manual override options. Designed for automated valve assemblies, these units ensure flexible manual control.
Fail-Close Spring Return Linear Pneumatic Actuator with Top-Mounted Handwheel Override
The internal spring closes the valve upon air loss. Operators can also actuate the valve manually using the top-mounted declutchable handwheel.
Fail Open Spring Return Pneumatic Actuator Linear Side-Mounted Bevel Gear Override
The side-mounted manual override reduces overall height for installations with vertical limits. It also allows convenient manual operation.
Fully Sealed Linear Pneumatic Actuator with Side-Mounted Bevel Gear Override
Fully sealed linear pneumatic actuator integrates a side-mounted, 3-speed bevel gear override. This gearbox provides mechanical advantage for high-load valve operation.
High Speed Double Acting Switching Overhead Manual Pneumatic Linear Actuator
The pneumatic linear actuator is engineered for rapid stroke speeds and emergency isolation. Its low-friction drive works with high-flow accessories, such as quick exhaust valves and volume boosters. This setup maintains fast stroke speeds under heavy loads.
Why Choose Hearken’s Linear Pneumatic Actuators?
Modular Sub-Assembly Design
Hearken Flow linear pneumatic actuators feature a modular, split-component design. The actuator body, enclosed spring cartridges, and manual overrides pack as separate, compact modules. This packaging method reduces shipment volume and freight cost. Upon arrival, local warehouses can assemble pneumatic linear actuator components on demand. This system lowers inventory costs and speeds up local order delivery.
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Low Friction
Hearken Flow pneumatic linear actuators feature an enclosed tie-rod design rather than the external tie-rods common on standard actuators. This compact construction reduces external dimensions. An integrated guidance system prevents eccentric cylinder wear, improving load stability and service life.
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Ensure Stable Performance in Harsh Environments
Hearken Flow linear pneumatic actuators apply a two-layer protective coating. The epoxy zinc-rich primer provides cathodic protection against rust, while the polyurethane topcoat resists wear, chemical attack, and UV degradation.
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Hearken Flow linear pneumatic actuators deliver Fail-Closed (FC) and Fail-Open (FO) actions through internal springs. With external pneumatic control circuits, they also perform Fail-Locked (FL), Fail-Locked/Trend-Closed (FLC), and Fail-Locked/Trend-Open (FLO) operations. This control loop compatibility meets strict Emergency Shutdown (ESD) and Safety Instrumented System (SIS) standards.
Hearken Flow linear pneumatic actuators use corrosion-resistant coatings and sealing materials for operation across wide temperature ranges. To match specific field conditions, we offer three temperature configurations:
- Standard Range (-20°C to +80°C): Fits general industrial environments.
- High-Temperature Range (-20°C to +200°C): Uses fluororubber (FKM) seals for thermal oil, steam, and high-temperature process lines in chemical and metallurgical plants.
- Low-Temperature Range (-40°C to +80°C): Uses fluorosilicone or silicone seals with specialized lubricants to maintain mechanical responsiveness down to -40°C.
Hearken Flow standardized linear pneumatic actuators improve inventory turnover and operational flexibility. A single actuator series pairs with various valve bodies to cover six main industrial sectors:
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Linear valve actuation requires coordination between the actuator and control components. Hearken linear pneumatic actuators use standardized mounting interfaces for accessories, including solenoid valves, air filter regulators, positioners, limit switches, and position transmitters.
Hearken also provides technical sizing and factory mounting services. Based on valve specifications, our engineering team configures accessories, then fully assembles and pressure-tests the package before dispatch. This service reduces field integration time and speeds up delivery.
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FAQs
Yes. We supply both top-mounted handwheels and side manual overrides. If the air supply fails, the top handwheel lets you manually adjust valve position. During normal operation, it also acts as a stroke stop.
Yes. Our actuator brackets and linkages comply with IEC 60534-6-1 standards. You can directly mount standard positioners from Siemens, Emerson, and other brands to run quick self-tuning.
Controlling friction is key. We hone the cylinder inner walls and use low-friction seals. This prevents stick-slip issues and ensures smooth response with smart positioners.
Yes. Hearken Flow linear actuators have adjustable travel stops with a ±5% range at stroke ends. This helps fine-tune the valve seat position for tight shut-off.
Yes. For temperatures from -29°C down to below -40°C, we use materials that prevent cold brittleness. Standard piston rods use chrome-plated AISI 1045 steel. For extreme cold, we use 316/316L stainless steel and low-temperature fluorosilicone O-rings.
Yes. Our linear actuators meet SIL3 certification requirements in mechanical design and spring-return logic. They suit emergency shut-off valves (ESD).
Yes, but we recommend vertical installation. Horizontal mounting on heavy or long-stroke cylinders causes piston rod sag, leading to seal and bushing wear. If you must install it horizontally, add external support brackets.