Stainless Steel Pneumatic Actuator

“4Matic” pneumatic actuators are 100% stainless steel actuators with the strong point of the fourth generation rack & pinion pneumatic actuators. Based on latest CNC machining centers & mechanical manufacturing technology, and nearly 20 years know-how of the rack & pinion technology, this actuators we manufactured is a high grade product with the characteristics of reliability, high performance, long cycle life and already proved to be used in most corrosive chemicals as well as very harsh industrial atmospheres.

Wide scope of output torque. Totally, we have 10 different size (specifications) actuators for choice. The output torque range is from 15Nm to 3815Nm at 5 Bar. The AA-300 stainless steel actuator with 3815 Nm is biggest one in the World now.

A perfect corrosion resistant actuator. All the vital components of AA series actuators and its accessories are manufactured from stainless steel. Investment casting stainless steel is used to make the body and end-caps. The CF8 (304) and CF8M (316) are the options for selection. The pinion and fastening are provided in 304 or 316 as per any specific demand. A vast experience of around more than 20 years in application has shown that this type of stainless steel pneumatic product is inductive to provide utmost resistance to nearly all corrosive chemicals, like acid, alkali and corrosive industry environments, e.g., offshore, oil and gas platform, pharmaceutical, food industries etc.

Smooth operation and long life operation. High level manufacturing technology for the rack & pinion in our workshop allows this actuator not only to cycle more than 1 million times free from failure but alos to offer exceptionally smooth actuation due to the low friction generated during rotral operations.

Flexible adjustment in travel ends. The two independent external travel stop bolts allow ±5°adjustment at 0°and 90° of the quarter travel.

Design and Feature:

Namur and ISO5211 Mount. AA series Stainless Steel Pneumatic Actuators are designed to incorporate Namur mounting for solenoids, limit switches and positioners and offer a ISO5211 combination mounting pads that allow you to mount directly to quarter turn valves.

Single acting with high performance springs. Preloaded coating springs are made from the high quality material for resistant to corrosion and longer cycle life, which can be demounted safely and conveniently to satisfy different requirements of torque by changing quantity of springs.

Operating Principle:

Double Acting (R-closed):

By supplying air to Port B, pressure is applied to the outside chamber and drives the dual pistons inward. The action causes the pinion to turn clockwise while the air is being exhausted from Port A.

By supplying air to Port A, pressure is applied to the center chamber and forces the dual pistons outward. Linear piston force is transferred via gear racks to the pinion gear, causing the pinion to turn counterclockwise while the air is being exhausted from Port B.

Spring Return (R-closed, fail closed):

Upon loss of air pressure, the stored energy in the compressed springs forces the pistons inwards producing rotary motion with exhaust air exiting at Port A. This “fail safe” position is held by spring force until air pressure reapplied to Port A.

By supplying air to Port A, pressure is applied to the center chamber, forcing the dual pistons outward, compressing the springs in the outside chambers to produce a counterclockwise rotation. Exhaust air exits at Port B.

Ordering Guide

Stroke Adjustment

Stroke Adjustment: Pinion stops allow ±5° adjustment at 0° and 90°.

Spring Return Actuators Output Torque (in.lbs):