Jordan Valve 1051M Series Rotary Actuator User Manual

Page 4

-4-

Turnbuckle Adjustment

Warning: The sudden release of process fluid can
cause personal injury or property damage. Prior to
starting adjustment procedures:
•

Isolate the valve from the process,

•

Release the process pressure, and

•

Vent the actuator loading pressure.

Correct turnbuckle adjustment ensures the valve is

correctly closed when the actuator is against its travel

stops. Refer to Figure 6 for Key Numbers.

For accurate adjustment to the zero-degree valve ball

position, remove the valve from the pipeline. Refer to

instructions in the appropriate valve body instruction

manual.

A regulated air supply will be required to stroke the

actuator. Consult Table 2 in the Data Sheet for the sizes

of the three open-end wrenches required for the proce-

dure.

Note: To achieve the most accurate adjustment of the
actuator, do not remove the cover during this proce-
dure (Key 41).

Remove the access plate (Key 11) and machine

screws (Key 29) if included.

Loosen the lower locknut (Key 14).

Ensure that there are no tools or instruments

within the actuator housing and blocking

the stroke path. Add pressure to the diaphragm

casing to stroke the actuator down and provide

access to the left-hand threaded upper locknut

(Key 18). Loosen the locknut.

Use one of the following according to the ser-

vice required by the actuator:

Push-Down-To-Close:

Slowly stroke the

actuator to the down travel stop.

Determine the closed position of the

valve according to the appropriate

valve body manual. Adjust the

turnbuckle until the valve is in the

closed position and lock this

adjustment with the left-handed

locknut (Key 18). Stroke the actuator

to the mid-travel position and tighten

the locknut (Key 16).

Push-Down-To-Open:

Determine the

closed position of the valve according

to the appropriate valve body manual.

Release all pressure from the

diaphragm casing and ensure that the

diaphragm is against its up travel stop.

Check the valve position and stroke the

actuator so the turnbuckle (Key 16)

is accessible through the access

opening. Adjust the linkage, release

pressure to the actuator and check the

new adjustment. Continue this

procedure until the valve is in the closed

position when the actuator is resting

on its up travel stop. Tighten the locknut

(Key 14), stroke the actuator and tighten

the left-hand threaded locknut (Key 18).

Replace the access plate (Key 11).

Loosen the self-tapping screws (Key 7), adjust

the travel indicator (Key 38) and retighten the

self-tapping screws.

Figure 4: Lever Operating Clearance

Actuator

Size

Turnbuckle

(Key 16)

Lower

Locknut
(Key 14)

Upper

Locknut
(Key 18)

15/16

1/2

7/8

1-1/8

3/4

1-1/8

1-5/16

15/16

1-15/16

Table 2: Wrench Sizes Required for

Turnbuckle Adjustment, In

1051M S

erieS

otary

ctuator