Valve Automation Products – Pneumatic Actuators & Gearboxes

Q: How do I choose the right pneumatic actuator?

Start with your valve type (ball, butterfly, or plug), required torque, and fail-safe action. Rack & pinion actuators suit low to medium torque; Scotch yoke actuators handle high torque. Define spring return or double acting based on your safety requirement.

Q: What is the difference between spring return and double acting actuators?

Spring return actuators use air pressure to open or close and a spring to return to a safe position on air loss (fail-close or fail-open). Double acting actuators use air in both directions and hold position when air is lost.

Q: Can JIMAI provide 2D or 3D drawings?

Yes. JIMAI provides free 2D drawings and 3D/STP files scaled 1:1 for project integration. Submit your valve parameters via our contact form and our engineering team will respond promptly.

Q: What information is required before quotation?

Please provide valve type, valve size, required torque, working pressure, power or signal requirement, environment (standard or hazardous), mounting standard (ISO 5211, NAMUR, etc.), and quantity.

JIMAI Automation: Your Trusted Partner for Flow Control Solutions since 2004.

Browse our complete range of pneumatic actuators (Rack & Pinion, Scotch Yoke), valve gearboxes, bevel gearboxes, and accessories for Oil & Gas, Water Treatment, Chemical, Power, and general industrial applications. Use the selection guides below to find the right solution by valve type, torque, fail-safe requirement, mounting standard, or explosion-proof rating.

ISO 9001 Certified

ATEX Explosion-Proof

SIL3 Safety Rated

CE Compliant

Find the Right Product for Your Application

Start here to narrow down your options before reviewing full specifications.

Choose by Valve Type

Match actuators and gearboxes to your valve design.

Choose by Torque

Select based on required break torque and safety factor.

Choose by Fail-Safe

Define how the valve should behave on air or power loss.

Choose by Explosion-Proof

For hazardous areas in Oil & Gas, Chemical, and industrial plants.

Choose by Mounting Standard

Match actuator interface to your valve top flange and accessory layout.

Pneumatic Actuator

Quarter-Turn Actuator ATEX / SIL3

Best for: Ball, butterfly & plug valves
Key spec: 2–8000 N·m torque, spring return or double acting

Type: Heavy-duty Rack & Pinion / Scotch Yoke
Lifespan: Tested for 1 Million+ Cycles
Standard: ISO 5211 & NAMUR Compliant
Options: Double Acting & Spring Return (Fail-safe)

⚡ In Stock: Standard models ship in 48 hours.

View Models & Specs → Request Quote

Valve Gearbox

Worm Gear Drive ISO 5211

Best for: Large butterfly & ball valves
Key spec: High break torque, manual or electric drive

Design: Multi-turn for Gate & Globe Valves
Thrust: High thrust bearing capacity
Operation: Manual or Electric Actuator Mountable
Temperature: -40°C to +120°C options available

View Models & Specs → Request Quote

Bevel Gearbox

Multi-Turn Gearbox DIN 3337

Best for: Gate & globe valves
Key spec: Multi-turn operation, high reduction ratio

Design: Multi-turn for Gate & Globe Valves
Thrust: High thrust bearing capacity
Operation: Manual or Electric Actuator Mountable
Temperature: -40°C to +120°C options available

View Models & Specs → Request Quote

Declutchable Gearbox

Manual Override Emergency Op.

Best for: Pneumatic actuator override
Key spec: Declutch for manual emergency operation

Function: Emergency Manual Override for Actuators
Safety: Simple lever for Quick Auto-to-Manual switch
Mounting: Sandwich mount between Valve & Actuator
Reliability: Essential for ESD (Emergency Shut Down) systems

View Models & Specs → Request Quote

Actuator Accessory

Position Feedback NAMUR / IP67

Best for: Actuator position monitoring
Key spec: Limit switches, positioners, solenoid valves

Limit Switch Box: APL-210N, ITS-300 (Explosion Proof)
Positioner: 4-20mA Pneumatic/Electro-Pneumatic
Solenoid Valve: NAMUR Interface 3/2 or 5/2 Way
Service: 100% Pre-assembled & Tested before shipping

View Models & Specs → Request Quote

Frequently Asked Questions Before You Buy

Common questions from engineers and procurement teams selecting valve automation products.

How do I choose the right pneumatic actuator?

Start with your valve type (ball, butterfly, or plug), required torque, and fail-safe action. Rack & pinion actuators suit low to medium torque; Scotch yoke actuators handle high torque. Define spring return or double acting based on whether the valve must fail-close or fail-open on air loss.

What is the difference between spring return and double acting actuators?

Spring return actuators use compressed air to drive the valve and an internal spring to return to a safe position when air or power is lost (fail-close or fail-open). Double acting actuators use air pressure in both directions and hold the valve in its last position when air supply stops. See our pneumatic actuator range for both options.

Which valve gearbox is suitable for butterfly valves?

Worm gear valve gearboxes are ideal for large butterfly valves that require high break torque and manual or electric operation. For extremely high torque applications, consider the JMG Series with reduction unit.

Can JIMAI provide 2D or 3D drawings?

Yes. JIMAI provides free 2D drawings and 3D/STP files scaled 1:1 for your project integration. Submit your valve parameters through our contact form and our engineering team will respond promptly.

What information is required before quotation?

To provide an accurate quote, please share: valve type, valve size, required torque, working pressure, power or signal requirement, environment (standard or hazardous area), mounting standard (ISO 5211, NAMUR, etc.), and quantity. The more detail you provide, the faster we can confirm model fit.