Installation Instructions

Instruction Manual

D103048X012

3024C Actuator

May 2011

CAUTION

Be sure that the length of the actuator stem and the valve stem in the connector (key 50) is equal to or greater than the

diameter of that stem. Incomplete engagement of either the valve or actuator stem in the stem connector can result in

stripped threads or improper operation.

In the following procedure do not rotate the valve plug while it is seated. This may damage the seating surface and cause

excessive leakage. While making adjustments, use tools carefully to avoid damaging the valve stem. A damaged stem

could cut the packing and allow leakage through the packing box.

e. Install the other half of the stem connector and insert the socket screws and nuts and tighten them.

f. Screw the two stem locknuts (key 52) up the valve stem to the stem connector and tighten. Do not over tighten.

g. Slowly decrease and then increase the diaphragm pressure several times stroking the valve from the lower end

to the upper end of the spring range.

h. Apply air pressure to the diaphragm until the valve is in the closed position. Loosen the screws of the travel scale

(key 26) and align it with the indicator on the stem connector.

i. Stroke the valve full travel to ensure that the travel matches the valve travel on the travel indicator plate.

j. If the valve travel is not correct, repeat the stem connector procedure. Remove the air pressure from the

diaphragm, remove the stem connector and repeat steps c to i.

For a 3024C Air‐to‐Open Actuator with a Push‐Down‐to‐Close Valve:

a. Apply approximately 0.5 bar pressure above the upper setting of the spring pressure range to the bottom of the

diaphragm. This positions the actuator stem (key 8) at the highest point. The spring range is stated on the

nameplate or in table 3.

b. Carefully place the actuator on the valve so that the yoke boss fits over the valve bonnet.

c. Screw the yoke lock nut onto the bonnet and tighten.

d. Lift the valve plug off the seat by the correct travel for the valve. The travel is stated on the nameplate or in table

e. Place the stem connector half (key 50) approximately halfway between the actuator and valve stems but

observing the F dimension in table 5 so that any positioner lever (if fitted) is horizontal at mid‐travel. Be sure that

the actuator and valve stem threads are engaging the threads of the stem connector by at least the distance of

one diameter of the stem.

f. Install the other half of the stem connector and insert the socket screws and nuts and tighten them.

g. Screw the two stem locknuts (key 52) up the valve stem to the stem connector and tighten. Do not over tighten.

h. Slowly decrease and then increase the diaphragm pressure several times stroking the valve from the lower end

to the upper end of the spring range.

i. Remove all air pressure from the diaphragm so that the valve is in its closed position. Loosen the screws of the

travel scale (key 26) and align it with the indicator on the stem connector.

j. Stroke the valve full travel to ensure that the valve travel matches the valve travel on the travel indicator plate.