... life compound material, to avoid the direct contact between metals. The maintenance and replacement are easy and convenientSpring return pneumatic actuator's ... clockwise while air is being exhausted from port A.Spring return pneumatic actuator's operating condition1, medium : Dry or lubricated air ... , API6D,ASME B16.34, DIN3357/1 Length of face to face : ASME B 16.10, DIN 3202 F1 or F7Flange end : ASME ...