Azbil Corporation
Model: AMT, HDT - CV3000 Series Control Valves
21
B. Revers action models
(1) Secure the bottom diaphragm case with the four bolts to the yoke. At the same
time, set the air pipe connection port in the location shown in the Fig. 4-9.
(2) Insert the actuator rod (with diaphragm connected) into the bushing. Be careful
to prevent the bushing's inside surface or dust seal from being damaged by the
threaded section of the rod. If possible, cover the threaded section with adhesive
tape.
(3) Rotate the actuator rod, locating its diaphragm plate stopper as shown in Fig.
4-9.
(4) Fasten the spring plate and install the springs onto the spring plate.
(see Fig. 4-9).
(5) Place the top diaphragm case and secure it with the pair of eyebolts.
Note: Set the air vent hole to the location shown in Fig. 4-9. Uniformly and
alternately tighten the eyebolts. 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.
(8) Install the stem cap onto the air vent port.
(9) Connect the air pipe to its connection port at the bottom diaphragm case.
(10) After completing of assembly, check the following.
• Apply air pressure of 490 kPa {5 kgf/cm
2
}through the air pie connection port at
the 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
the actuator as an independent unit.
CAUTION
Install packing for the rod and dustseal in the correct direction.
Refer to Fig.4-7.
Diaphragm plate
Diaphragm plate
Stopper
Eyebolt
Air vent hole
(upper diaphragm case)
Air pipe connection port
(lower diaphragm case)
Fig. 4-9 Reverse Action Model Model PSA1R Actuator
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