UNIWORLD Series
M/UNIWORLD-M/E ed. 01 2020
3.14.2.2
– VALVES 2600 EP – 5600 EP – 2700 EP – 5700 EP
ATTENTION
IF THE VALVE IS FITTED WITH A SOFT SEAL, CONSIDERING THE COMPLEXITY OF THE OPERATIONS FOR
PACKING AND BELLOWS REPLACEMENT, YOU ARE ADVISED TO CONTACT OUR SUPPORT SERVICE.
The operation to replace the packing involves dismantling the trim.
For
Types 2600-2700-5600-5700 EP
, the replacement operation of the packing can only be carried out with the valve dismantled from
the tubing.
Open the valve to half stroke
Fig. example “
2600 EP
– 5600 EP
”, proceed as follows:
Unscrewing the plug locking nuts ref. 3 with the relevant washer ref. 4, if the valve is model 2600-5600 EP, the plug remains inside the
compartments (same applies for 5700 EP DN15-20 ), then unscrew the locking nuts ref.17 and remove the servomotor / bonnet / trim
assembly, then proceed as follows:
remove the complete bonnet ref.7 and proceed to replace the packing as indicated in Fig. “PACKING” page 11
EXCEPTIONS:
1.
On diameters DN125-200 this operation involves removal of the bonnet with the closure floating flange.
If the valve is model 2700
– 5700 EP DN25-200, the lower profile ref. 5 – see figure example “2700 – 5700 EP” page 10, it will be
removed from the stem and remain in hand together with the locking nuts and relevant washer.
Then, the servomotor / bonnet / trim assembly can be removed.
For 5700 EP type valves, you are always advised to firstly remove the trunk ref.1°, to facilitate the unscrewing operation of the internal
nuts and obviously to replace the lower gasket of the trunk.
When the packing is changed, the body gasket must also be changed, see 3.14.1
Then proceed to assemble the new packing following the previous operations in the reverse order, see Fig. “PACKING”.
Then, proceed to assemble in the reverse order.
3.14.3
– REPLACEMENT OF THE PLUG PROFILE - SOFT SEAL and COMPARTMENT
ATTENTION
IF THE VALVE IS FITTED WITH A SOFT SEAL, CONSIDERING THE COMPLEXITY OF THE OPERATIONS FOR TRIM
REPLACEMENT, YOU ARE ADVISED TO CONTACT OUR SUPPORT SERVICE.
EXCEPTIONS:
1.
The UNIWORLD valves compartment is screwed onto the valve body with sealing paste. To replace it, the entire valve body
must be changed.
2.
For 3-way valves Type 2600-2700-5600-5700 EP, replacement of the plug profile and the compartments must be carried out
in our plant due to the complexity of the procedure.
3.
For 2-way valves Double Seat Type 5800 EP, replacement of the plug profile and the compartments must be carried out in
our plant due to the complexity of the procedure.
For valves
EP
, page no. 23, proceed as follows:
Open the valve to half stroke
unscrew the locking nuts ref. 17 that tighten the yoke ref. 18 for version 5000 DA always unscrew the lower nuts ref. 17 that tighten the
lower flange ref. no. 1a, at the same time remove the overall servomotor with the bonnet and trim connected, unscrew the nuts ref.4
and remove the washer ref.4, then remove the plug profile ref.5 and change the profile.
THE SAME PROCEDURE MUST ALSO BE APPLIED TO REPLACE THE SOFT SEAL. IN THIS CASE, REMOVE THE PROFILE
AND REPLACE THE SOFT SEAL RING IN PTFE or PTFE/GR FITTED IN THE BOTTOM
– see “SEAL TIGHTENING FORCES
TABLE”
When the profile is changed, the body gasket must also be changed, see 3.14.1
Proceed to assemble in the reverse order.
SOFT SEAL TIGHTENING FORCES TABLE
DN 15-20
DN 25-32
DN 40-50
DN 65-100
DN 125-200
6/7 Nm
8/9 Nm
9/10 Nm
8/9 Nm each screw
9/10 Nm each screw
