ATI Quarter-Turn Hi-Pressure Direct Gas Actuator

Performance Highlights




The ATI Quarter-Turn Hi-Pressure Direct Gas valve actuator is designed to operate using direct pipeline gas with pressures up to 1500 psi, providing torque outputs over 1 million inch-pounds. The unique design utilizes the best features of the traditional gas-over-oil actuator while solving some of the problem areas associated with traditional designs. The design is based on separate gas and hydraulic cylinders to provide a simple, reliable, low-maintenance actuation for pipeline valves.

ATI Quarter-Turn Hi-Pressure Direct Gas Actuator Performance Highlights

Separate Gas Power and Hydraulic Override Systems

Utilizing separate cylinders for the high pressure power gas and the manual hydraulic pump eliminates the commingling of gas and oil and therefore eliminates the possibility of oil release to the atmosphere during valve operation. The direct gas actuator utilizes 50% to 75% less natural gas during operation than traditional gas-over-oil system design, primarily because there is no dead tank space to fill at the beginning of the actuator stroke.

The completely sealed, closed loop hydraulic system for the manual hand pump included provides smooth, efficient operation. When pipeline pressure is not available, the manual hand pump can be used to safely and reliably open and close the valve at its maximum torque requirement. Independently adjustable opening and closing speed controls are built into the manual hand pump module and are easily adjusted in the field without the need for special tools. This closed loop hydraulic circuit eliminates the costly maintenance process to regularly drain collected condensation from the gas/oil tanks, as well as the costs of refilling tanks, the costs of spillage, and the problems associated with disposal of the used oil. In addition, this system utilizes 75% less on-board oil than a gas-over-oil system.

Canted Scotch Yoke Design

The canted scotch yoke mechanism provides high breakaway torque at the beginning stroke resulting in smaller cylinders, which reduces cost and gas consumption. All direct gas actuators utilize Teflon impregnated, sintered bronze bushings on a heavily chrome-plated guide bar to absorb any side loads, guaranteeing smooth operation and longer cycle life.

Linear Travel Stops

The externally adjustable travel stops are on center with the piston rod, eliminating side loading to the scotch yoke. Located at either end of the actuator, these travel stops provide precise adjustment. Both the open and close travel stops are independently adjustable.

Electroless Nickel Plated Cylinders

Both the gas and hydraulic cylinder walls are electroless nickel plated and precision honed to ensure long lasting, trouble free service. All pistons are furnished with a Teflon impregnated graphite guide ring (wear band) that eliminates any possible metal to metal contact. The piston and rod seals are made of Teflon rings preloaded by an O-ring suitable for the most severe working conditions.


ATI Quarter-Turn Hi-Pressure Direct Gas Actuators are used in the following industries. Click below to learn more.

Our Client


I have to say, we looked at the valves and the actuators this afternoon and they are very well packaged and presented. I want to thank ATI for the attention this order has clearly received & I plan to pursue similar solutions in the future with you guys.


In all of the readiness reviews that I have conducted, ATI is by far the most well-prepared. The organization has built a solid foundation, and is off to a healthy start to the new [ISO 9001:2015] standard; ATI has clearly taken a serious approach to addressing the risks of its business and handling mitigation in a controlled manner.

Tom R., , Independent Auditing Agency

ATI linear actuators on 6-inch and 8-inch gate valves have worked flawlessly since put in Y-grade liquid service in 1994.

George Ford, Engineer, Enterprise Products

I was impressed and quite thankful for ATI’s commitment to get the job done on time and with a high level of quality.

Konrad M. Fontenot, Engineering Section Group Lead, Exxonmobil Beaumont

ATI has been supportive when we have had questions and their product has worked well for us. If the application came up again where we had the choice of using the ATI actuators, I would recommend getting them.


All of our switching valves for our mole sieve beds are orbit valves fitted with ATI actuators. These have been in service for ~8 months now and have had no issues.


ATI was very supportive during this project with helping us when we had to retrofit the actuators to the valves during a quick series of valve replacements.


We have 14 of your actuators at this facility, with a clean rack record for over a decade.

Maintenance Team Member, Industrial Gas Supplier

I really appreciate the commitment to deliver the needed products on a very short schedule.

Instrument Engineering Section Member, Gulf Coast Refinery

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