Pneumatic Rotary Actuator 3 Position Actuator Ball Valve Material
Loading Systems
pneumatic actuators statement of usage and selection
Through research development and design XM series pneumatic
actuators incorporate the latest technology materials and
innovative idea. The product proudly boasts the following features.
Full conformance to the latest specifications: ISO5211,DIN3337 and
VDINDE-3854,NAMUR.
The extruding high intensity aluminum body possesses a honed
internal surface coated with hard anode oxygenation for long life.
Low coefficient of friction and swift performance.
Excellent compact and modernized construction along with multi
specifications makes the selection both economic and beneficial.
All acting surface adopt high quality bearing resulting in low
friction, high cycle life, and no noise
The two independent external stroke adjustment bolts can easily and
precisely adjust ±5°at both open and close directions.
Same outline actuators have the functional modes of double acting
and single acting (Spring -Return). The Spring-Return has the
normally-open and normally-close styles.
Multi function indicator with NAMUR is convenient for mounting
accessories.
Pre-compressed load spring is convenient for safe mounting and tear
down procedures.
Die-casting aluminum pistons and end caps have high intensity and
light weight.
Different O-rings materials are available for high and low
temperature.
Solenoid valves are easily mounted without any connecting plank.
3-position (90° rotation) 3 position pneumatic actuators provide an
operation of 0°- 45°- 90°. the intermediate position is achieved by
an external mechanical stop of movement on the 2 auxiliary pistons
(for spring return actuators it may be only one auxiliary piston).
this intermediate stop position is adjustable from 0° to 90°, for
example 5°, 20°, 30° 50°, 75° etc. the intermediate position is
easily achieved by adjusting the external nuts located outside the
two end-caps. both type, double acting and spring return, are
available. field of application: for dosing, for exact filling and
for any kind of services where on 90° rotation an intermediate stop
position is desired.
in order to control the operation of air torque 3-position
pneumatic actuators a system of solenoid
valves controlling a sequence of air supplies to the actuator is
required as described below:
when ordering 3-position pneumatic actuators, add “3p” to the
normal
actuator code and specify the desired stop position including the
intermediate e.g. 0° - 45° - 90°.
position 1 (intermediate position):
this position is achieved when air is supplied simultaneously to
ports 2 and d whit exhaust air at ports 4 and c. in fact the air
supplied at ports d forces the auxiliary pistons to the center
and the rods serve as mechanical stops for the internal pistons
stopping in the desired intermediate position.
position 2 (fully open position):
this position is achieved when air supplied to port 2 and port c
(air to port c may also be avoided) with exhaust air at port
4. in this condition air to port 2 permits air to the internal
pistons
to continue the opening stroke.
position 3 (fully closed position):
this position is achieved when air is supplied to port 4 with
exhaust air at port 2.
