Linear Hydraulic Actuators

Linear Hydraulic Spring Return Actuators

• Actuate any rising stem valve
• True Mechanical failure mode
• Precision machined steel cylinder heads maintain linearity
• Springs pre-compressed and welded into sealed spring cartridge at the factory for safe, maintenance-free service
• Spring rates customized for maximum stiffness
• Hydraulic actuator inside the unit, which reduces height
• Travel stops in place to protect valve and stem.

Spring Return Explanation

Spring Return Standard Specifications

• The ATI double acting actuators are designed to accomadate high pressures
• Allows maximum thrust and minimum unit size
• Actuate any rising stem valve
• True Mechanical failure mode
• Precision machined steel cylinder heads maintain linearity
• Springs pre-compressed and welded into sealed spring cartridge at the factory for safe, maintenance-free service
• Spring rates customized for maximum stiffness
• Hydraulic actuator inside the unit, which reduces height
• Travel stops in place to protect valve and stem.

Double Acting Explanation

Double Acting Standard Specifications

• Bore Size2″ thru 16″
• Stroke1″ thru 32″
• Maximum Working Pressure3000 psi
• Maximum Capability Pressure5000 psi
• Static Pressure Test4500 psi
• Thrust500 lbs to 50,000 lbs
• Temperature RangeStandard -40º F to 200º F Low Temp -65º F to 200º F High Temp -20º F to 400º F

* Larger bore sizes, longer strokes and higher pressure are available.

Linear Hydraulic ACTUATORS PERFORMANCE

• Our H series actuator is ideal for control valves especially when it incorporates the ATI hydraulic positioning system.
• Our HDH series actuator has been effectively used for on/off applications such as steam blow applications that require very fast opening speeds.
• The adaptable nature of our design allows you to automate valves in place without shutting the plant down.

The Two Types of Linear Hydraulic Actuators Offered

Spring Return Actuators and Double Acting Actuators

There are differences that are key to operations and applications. For starters, actuators do not have equal strength abilities with regard to thrust and torque, and below is the difference between the spring return actuator and the double acting actuator with regard to torque and thrust strength:

The double acting actuator is best for high torque loads for the working directions and high thrust strength — thus, ideal for oil and gas industries.

The spring return actuator is not designed for both the working directions and high thrust strength but designed to accommodate torque load that is adept on one side only.

Another difference is with respect to how simple or complex the system is — spring return actuators are simpler in design and operation than the double-acting actuator. Applications that are in volatile environments or use toxic chemicals and that may require emergency shutdowns on demand may consider using the spring return actuator over the double-acting actuator.

How to Choose a Linear Hydraulic Actuator for Your Industry’s Operations or Applications

Selecting the right equipment for your operations and applications can be difficult when the options are manifold. To make the consideration easier on you, here are some factors you should think about.

Compatibility. What is your source of power? Gas, oil, electricity, air? What source of power is readily available for your operations and applications?

Operational Worksite Conditions. Is the operation outside, inside, offshore? Is the operation vulnerable to weather conditions or other environmental conditions? Are there hazardous or toxic substances used in or around the worksite?

Temperatures. Temperature is important with respect to the actuator you get. Some actuators can operate in temperatures as low as -40° F and as high as 250° F. Not all actuators will perform at the same temperature.

Speed. The extent of the speed your operations necessitate will determine the power requirements for performance, and power requirements will determine the actuator you need.

Safety and reliability. Because so many operations and applications in the industries related to oil and gas, power, chemical, paper, mining, and water can be so hazardous, choosing an actuator according to application specifications, safety, and reliability, is critical.

Select the Linear Hydraulic Valve Actuator for Your Operations

Like all actuators, each serves a purpose and provides benefits. The linear hydraulic valve actuator designed with purpose. Choosing the right one comes down to your specific requirements, needs, and concerns. Don’t select an actuator in haste; thoughtfully select with performance in mind — as we did when we designed and developed our actuators.

• ATI Overview
• IOM1004 – Hydraulic Spring Return Extend (SRE) Linear Actuators
• IOM1005 – Hydraulic Spring Return Retract (SRR) Linear Actuators
• IOM1006 – Hydraulic Double Acting (DA) Linear Actuators
• Linear Hydraulic Thrust Chart & Weights and Dimensions
• Explanation of Model Numbers