Linear Pneumatic Actuator
Diaphragm/cylinder designs for control valves and other linear-motion applications.
Product overview
The linear pneumatic actuator series uses a piston drive to deliver stable linear thrust for different linear-stroke valves. Cylinder diameter can be customized to match thrust requirements. The all-steel cylinder provides reliable structural strength and supports a maximum air supply pressure of 10bar. Multiple seal materials cover normal, low- and high-temperature conditions.
Double-acting and single-acting spring-return versions are available; the single-acting version provides fail-safe protection on air loss. Both on/off and modulating control are supported. Standard or custom interfaces and various automation accessories allow broad use on industrial control and shutoff valves in chemical processing, power generation and water treatment.
Core technology and operating parameters
| Model | Double-acting, single-acting |
| Specification | Custom cylinder diameter |
| Construction | Piston type |
| Interface | Standard, custom |
| Cylinder material | Steel |
| Seal material | Nitrile rubber (standard), silicone rubber (low temperature), fluoroelastomer (high temperature), custom |
| Maximum air supply pressure | 8 bar |
| Action type | Double-acting, single-acting |
| Control mode | Two-position shutoff (on/off), modulating |
| Accessory options | Solenoid valve, valve positioner, limit switch, three-piece air preparation unit (FRL), other |
Core construction and design advantages
Piston transmission delivers stable, reliable linear thrust
Custom cylinder diameter and thrust selection
Steel cylinder with high overall mechanical strength
Multiple seal options for demanding high- and low-temperature service
Maximum air supply pressure 10bar with excellent pressure resistance
Double-acting / single-acting spring-return versions available
Supports two-position shutoff and modulating control
Wide accessory selection simplifies system integration
Integration options
Recommended valves and accessories
Combine the linear actuator with the following valves and control accessories to create a complete automated fluid-control unit.
Gate valve
Flanged gate valve with a low-loss straight-through passage, DN25~500, matched to high-thrust linear actuators
Parallel-slide gate valve
Parallel double-gate sealing with zero leakage, DN25~500, matched to precise linear thrust control
Control accessories
Solenoid valves / valve positioners / limit switches / FRL units; standard interfaces for plug-and-play installation
Ready to upgrade your automated fluid-control system?
Standard or custom solutions for harsh conditions. HES technical team supports your project.