Flowserve 3 Series P7 Type User Manual download pdf (Page 5)

Flow Control Division

Kammer Control Valves

6 REMOVE AND INSTALL ACTUATOR

6.1 REMOVE ACTUATOR

(refer to figs. 1 + 2)

6.1.1 Shut off the air supply.

WARNING:

Depressurise the line to atmospheric

pressure and drain all fluids from the valve before

working on the actuator. Failure to do so can cause

serious injury.

6.1.2 Remove the coupling (15) from the actuator stem

(42):

Loosen clamping screws (50) and expand the clamp-

ing gap as required, apply air to the actuator to move

the actuator stem around 5% from it's end position.

Screw out the slotted nut (51) and drive the actuator

stem out of the coupling (by applying more air on

“Air-to-Open” or by venting air on “Air-to-Close”).

Remove ring (52), split ring (53) and slotted nut

(51).

6.1.3 Attach a crane to the eye bolt (46) to support the

actuator and remove the nuts (17) from the yoke

rods (19). Vent the actuator.

WARNING:

When the actuator is vented on version

“Air-to-Open” the actuator stem will extend and raise

the actuator!

Remove any tubing and raise the actuator from the

valve.

6.1.4 Loosen the coupling locknut and unscrew the cou-

pling (15) from the plug stem.

6.2 INSTALL ACTUATOR

(refer to Figs. 1 + 2)

6.2.1 Screw the coupling (15) onto the plug stem until the

stem touches the thrust washer (54).

6.2.2 Mount the actuator onto the valve and secure the

yoke rods (19) to the yoke plate (16) using the nuts

(17). Connect an air supply to the actuator using a

valve that can regulate the air to aerate and vent the

actuator.

6.2.3 Fit the slotted nut (51), ring (52) and split rings to

the actuator stem (on "Air-to-Open" versions retract

the stem by applying air).

6.2.4 Carefully enter the actuator stem into the coupling

and screw the slotted nut (51) into the coupling.

6.2.5 Screw the coupling anticlockwise onto the actuator

stem to achieve a pretension of 2 to 4 mm ensuring

that the NAMUR studs (14) are correctly positioned.

NOTE:

Ensure that the plug assembly is not rotated

with the plug seated. This may cause irreparable

damage to the seating faces.

6.2.6 Tighten coupling locknut, slotted nut (51) and

clamping screws (50).

6.2.7 As required reconnect all tubing.

7 DISASSEMBLE AND ASSEMBLE ACTUATOR

7.1 Diassemble actuator

7.1.1 Remove the 36 flange screws and nuts M16 (41/20)

and lift off the spring housing (39).

7.1.2 Remove the pre-tension plate (47) (only for actua-

tors with additional pre-tensioning), the spring plate

(33) and the pre-tensioned spring packs (23).

7.1.3 Remove actuator stem complete with diaphragm (2)

and diaphragm plate (1). Store with diaphragm fac-

ing upwards (be careful not to damage the dia-

phragm.

Disassemble diaphragm

7.1.4 Unscrew the 24 screws M12x30 (22) and lift off the

diaphragm.

7.1.5 Reverse the assembly so that the adjustung sleeve

(35) is facing upward.

7.1.6 Straighten the locking plates (37) and screw the

slotted nuts down (clockwise) until the split ring (5)

can be removed from the groove in the actuator

stem (secure the actuator stem against falling

through).

7.1.7 Remove sleeve ( 38), adjusting sleeve (35) complete

with slotted nuts (36) and locking plates ( 37),

Sleeve (34) and plate (4).

7.1.8 Remove the actuator stem (42) from the underside

of the diapragm housing (1) and remove the plate

(4) and split ring (5).

Fig. 2: Coupling

Service to the actuator is best performed when the actuator is removed from the valve body. For the purpose of these instructions, consider

the actuator as a separate subassembly with the procedures described in these instructions being performed in a designated workplace. However,

many service repairs and adjustments can be accomplished in the field while the actuator and valve body are still connected to each other.

Attention: The valve trim is a very sensitive assembly, take care not to damage it. Always remove and replace the actuator together with the

top yoke plate (12) and yoke rods (19).

STOP!

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Flowserve 3 Series P7 Type User Manual Page 5

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