A Series


Pneumatic Valve Actuator

High and Low Temperature Ranges
A Series: Double-Acting Valve Actuator

Mega bore size, reliable performance. Go for the A Series.

Double-Acting Valve Actuator

Designed and engineered for severe-service applications, the A Series bore sizes range from 4” to a whopping 42” diameter. We also offer a wide range of automation options. See at the bottom of the page for A Series add-ons. Configure your cylinder today.


  • Thrusts up to 425,000 lbs
  • SIL 3 Capable (IEC 61508)
  • GT3 Triple Seal Gland for
    Severe Service Applications


  • Bore Size: 4″ – 42″
  • Rod Size: 1″ – 5 1/2″
  • Configuration: Single-Stage and Tandem
  • Stroke Range: Up to 144″
  • Pressure Rating: 150 psi
Complete the form to get a quote within 24hrs.

SIL Certification Logo

Design and Materials

A Series Cutaway
GT3 Gland

GT3 Gland

Triple-seal gland with dual wipers. Rugged metallic scrapper and urethane double-acting wiper deflect contamination away from the rod seal for long service life

Control and Monitoring Solutions


Control Panels

Control Panels
Complete design, fabrication and testing of control panels for hazardous and special applications.

Manual Overrides

Manual Override options are available.
Manual Overrides: Screwjack with Handwheel
Screwjack with handwheel
Manual Overrides: Hydraulic Manual Override


Hydraulic manual override with indicator

Limit Switches

Limit Switches
Mechanical Limit Switch SPDT, for Open & Close Indication. Inductive switches also available. Solid State, Reed and inductive type also available. Specify brand and part number

Automation Packages

Automation Packages
Integration of Control Accessories
Solenoid Valves
Pilot Valves
Quick Exhausts

Position Feedback
Limit switches and position sensors
Field-Adjustable for open and close indication
Analog and digital feedback

Mounting Kits: ISO, MSS & Customized Patterns Available

Mounting Kits
Cowan valve mounting kits can be designed for any linear valve. Mounting kits available in steel and stainless steel construction.

Anti-Rotation Torque Arm:

Maintains constant alignment between valve stem and cylinder piston-rod. Compatible with rotary type switch boxes and beacons.

Field-Adjustable Travel Stops:
To limit stroke for position-seated or limited-travel applications. Ensures valve reaches positive sealing every time without damage to valve internals.

In Market Example

Double-Acting Valve Actuator. Designed & engineered for severe-service applications

In Market Example of a Double-Acting Valve Actuator

The A Series is yours in just a few clicks.

Complete the form to receive a quote within 24 hrs.