Azbil Corporation
Model: AMT, HDT - CV3000 Series Control Valves
20
Assembly
Before assembly, check the parts for scratches, damage, deformation, peeling paint
or any other abnormalities. To assemble the actuator, proceed as follows:
A. Direct action models
(1) Secure the diaphragm case (bottom) with the four bolts to the yoke. At the same
time, set the air vent hole as in Fig. 4-8. For PSA1D actuator, secure the spring
plate to the diaphragm case and yoke.
(2) Fasten the spring place and install the springs onto the spring plate (see Fig. 4-8).
(3) Insert the actuator rod (with diaphragm connected) into the bushing. Be careful to
prevent the bushing's inside surface or dust seal form being damaged by the threaded
section of the rod. If possible, cover the threaded section with adhesive tape.
(4) Rotate the actuator rod, locating the diaphragm plate stopper as shown in Fig.4-8.
(5) Place the top diaphragm case and secure it with the pair of eyebolts.
Note: Set the air pipe connection port to the location shown in Fig. 4-8. Tighten
the pair of eyebolts uniformly and alternately. The initial setting of the
springs is completed by tightening these eyebolts.
(6) Clamp the diaphragm case with clamping bolts.
(7) Install the stem connector. Connect the air pipe to its connection port at the top
diaphragm case.
(8) After completing assembly, check the following:
• Apply air pressure of 490 kPa {5 kgf/cm
2
} through the air pipe connection port
at the top diaphragm case, and check the diaphragm periphery for air leakage
with soapy water.
• Check that the actuator operates smoothly through to its full stroke by
operating it as an independent unit.
CAUTION
Install packing for the rod and dustseal in the correct direction.
Refer to Fig.4-6.
Diaphragm plate
Diaphragm plate
Stopper
Eyebolt
Air pipe connection port
(upper diaphragm case)
Air vent hole
(lower diaphragm case)
Fig. 4-8 Direct Action Models Model PSA1D Actuator
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