Flowserve 191700 Series - Manual (Page 6)

6
5.4.4 Welding fillers
Filler match-up table
Material to Suitable welding filler
be welded 1.4316 1.4430 1.4440 1.4519
1.4301 x
1.4306 x
1.4401 x
1.4404 x
1.4435 x x x
1.4571 x x
5.4.5 Final treatment of weld
Interior area
Final treatment of weld not required. Surface quality
can be improved at accessible points by grinding.
Exterior areas
Final treatment process:
Pickling– brushing– grinding- polishing
5.5 Cleaning
Clean entire valve thoroughly before installing.
5.6 Installation
Install according to installation instructions.
6 DISASSEMBLY AND ASSEMBLY
(see fig. 2)
6.1 Installation
To remove the complete valve, separable connec-
tions must be provided in the vicinity of the valve
connections
a and b.
We recommend following distances from the valve:
Product inlet ( a) : 1 x diameter
Product outlet ( b) : 6 x diameter
7 DISASSEMBLY
Please observe separate documentation for disas-
sembly of the actuator.
CAUTION:
Before disassembly:
depressurise the line to atmospheric pressure and
drain all fluid from the valve, close-off the supply air.
Valves with air-to-open actuators: tension the ac-
tuator springs using top handwheel or by applying
supply air under the membrane.
Failure to do this will cause the valve bonnet to
spring-out when the clamp is released due to the
spring pressure acting between the plug and seat.
Observe electrical connection voltage, as necessary
switch off power supply.
7.1 Disconnect pneumatic and electrical feed lines.
7.2 On air-to-open /spring-to-close actuators tension
actuator springs.
7.3 Remove actuator
Remove the coupling between the actuator stem and
the plug stem (3). Loosen the slotted nut (M38 x
1.5) on the valve bonnet (2) and remove the actua-
tor.
7.4 Release the tension on actuator springs.
7.5 Loosen and remove the TC clamp (3).
CAUTION: Do not rotate the stem (3) while the
diapragm is clamped to the body. This can damage
the stem and loosen the threaded connection between
stem(3) and plug (10) and the valve will leak.
7.6 Remove the bonnet (2) assy from the body (1).
CAUTION: To avoid damage to the aseptic diaphragm
(6) do not turn the bonnet.
7.7 Pull the plug/stem and diaphragm assy. (4+6+10) out
of the bonnet (2).
7.8 Carefully remove the wiper (5).
7.9 Remove the O-Ring (7) which serves as the stem seal
(191800 only).
7.10 Remove the PTFE-guide (8) from the bonnet (2).
7.11 Disassemble the aseptic plug:
7.11.1 Using a suitable tool, loosen and remove the plug (10)
from the stem (4).
7.11.2 Remove the diaphragm (6) from the stem (4)
7.11.3 Unscrew the diaphragm support ring (9) from the
stem (4).
8 ASSEMBLY
Please observe separate documentation for assembly
of the actuator.
Before assembly:
Thoroughly clean all surfaces.
8.1 Place O-Ring (7) in the bonnet (2) (191800 only).
8.2 Assemble the aseptic plug:
8.21 Screw the diaphragm support ring (9) onto the stem
(4), the flat side towards the stem.
8.2.2 Place the diaphragm (10) on the plug with the convex
side facing up.
8.2.3 Screw the plug (10) with diaphragm (6) onto the stem
(4) and tighten to 25 Nm.
8.3 Place the wiper (5) in the bonnet (2).
8.4 Insert the PTFE-guide (8) carefully in the bonnet (2)
and ensure it is seated correctly to prevent damage to
the guide.
8.5 Insert the plug/stem and diaphragm assy. (4+6+10)
into the bonnet
(2).
8.6 Place the outside rim of the diapragm (10) in the
shoulder on the bonnet (2).
CAUTION: Insert the bonnet straight. Ensure that the
outside rim of the diaphragm is correctly seated in the
groove in the bonnet. To avoid damage to the aseptic
diaphragm (6) do not turn the bonnet.
8.7 Place the bonnet assy. (2) on the body (1).
8.8 Replace the TC clamp (3) and tighten securely.
8.9 On air-to-open /spring-to-close actuators tension
actuator springs.
8.10 Mount the actuator on the valve and secure with slot-
ted nut (M38 x 1.5).
8.11 Attach the coupling between valve and actuator.
8.12 Release tension on the actuator springs.
8.13 Reconnect pneumatic and electrical feed lines and
prepare the valve for cleaning.