AT Spring Return

Features
● Mounting to valve either directly or via bracket.
● Conforming to European and International Standard EN ISO 5211, preferred dimensions.
● Double rack & pinion design.
● Double acting or Spring return models utilize the same compact body design.
● Aluminum body, hard anodized externally and internally, for corrosion and wear resistance.
● Adjustable travel stops.
● Safe end cover bolting requiring no special tools.
● Anti blow-out drive pinion.
● Namur air connection can be easily mounted with solenoid valve.
● Parallel and diagonal, double square(star) drive.
● Travel adjustment (at each end) ±5°.
● Easy field conversion between DA and SR models.

Technical data

Torque	Spring return 3.4 - 2442 Nm
Operating medium	Air (dry or lubricated)
Travel adjustment	(at each end) ±5°
Temperature	Standard -20°C to +80°C
	Low temp. -40°C to +80°C
	High temp. -15°C to +150°C
Air supply pressure	2.5 bar (36 PSI) to 8 bar (116 PSI)

 
Spring return operation function (standard rotation) TOP view:

● Air supplied to Port 2 forces the pistons apart and toward the actuator end caps, compressing the springs with the exhaust air existing at Port 4, a counter clockwise rotation is achieved.

● On loss of air pressure (air or electric failure) at Port 2 allows the springs to force the pistons together with the exhaust air exiting at Port 2, a clockwise rotation is achieved.