Definox VEOX PMO Operation and maintenance manual

MAINTENANCE NOTICE
NM-282 Revision 02 Page 1/31 March 2023
VEOX PMO INDEPENDENT SEAT MIXPROOF VALVES
www.definox.com

MAINTENANCE NOTICE
NM-282 Revision 02 Page 2/31 March 2023
TABLE OF CONTENTS
1 CHANGE MANAGEMENT 3
2 SAFETY 4
2.1 IMPORTANT INFORMATION 4
2.2 GENERAL INFORMATION 4
3 INTRODUCTION 5
3.1 DISASSEMBLING THE VALVE: (Extracting the isolation sub-assembly from the body of the valve). 5
3.2 DISASSEMBLING THE PNEUMATIC (Changing the internal seals). 5
4 DISASSEMBLING THE VALVE 6
4.1 DISMANTLING THE SIGNALLING BOX 6
4.2 BODY AND PLUG 7
4.3 DISASSEMBLING THE VEOX BREAKAWAY ACTUATOR (to change the seals and rings if required) 8
4.4 DISASSEMBLING VEOX PMO LOWER PLUGS 9
4.5 DISASSEMBLING THE VEOX PMO UPPER SEAL SUPPORT PLATE AND PLUGS: 10
4.6 DISASSEMBLING THE MAIN PNEUMATIC ACTUATOR 11
4.7 DISASSEMBLING THE LANTERN SUB-ASSEMBLY 12
4.8 DISASSEMBLING THE SHAFT/PISTON SUB-ASSEMBLY 13
5 REASSEMBLING THE VEOX PMO VALVE 14
5.1 REPLACING FAULTY COMPONENTS OR SEALS ON THE PLUGS 14
5.1.1 CHANGING THE PLUG SEALS ON THE VEOX PMO PLUGS. 14
5.1.2 REASSEMBLING THE VEOX PMO SHAFT/PISTON ASSEMBLY 16
5.1.3 REASSEMBLING THE VEOX PMO LANTERN ASSEMBLY 17
5.1.4 REASSEMBLING THE VEOX PMO ACTUATOR ASSEMBLY 18
5.1.5 REFITTING THE VALVE ASSEMBLY ON THE VEOX PMO BODY 19
6 VEOX PMO SPARE PARTS 20
6.1 SPARE PARTS FOR VEOX PMO BREAKAWAY SUB-ASSEMBLY (Seal kits § 6.8.1) 20
6.2 SPARE PARTS FOR VEOX PMO ACTUATOR (Seal kits § 6.8.2) 21
6.3 SPARE PARTS FOR VEOX PMO PLUG SUB-ASSEMBLY: ELASTOMER / ELASTOMER (Seal kits § 6.8.3, § 6.8.4) 22
6.4 SPARE PARTS FOR VEOX PMO BODY SUB-ASSEMBLY (Seal kits § 6.8.3 to § 6.8.4) 23
6.5 SPARE PARTS FOR VEOX PMO PLUG BREAKAWAY DETECTION OPTION 24
6.6 LANTERN-MOUNTED SENSOR ADJUSTMENT 25
6.7 VEOX PMO SPARE PARTS TABLE 27
6.8 REFERENCES OF SEAL KITS FOR VEOX PMO 28
6.8.1 VEOX PMO seal kits for NBR breakaway sub-assembly (Item: 56) 28
6.8.2 VEOX PMO seal kits for main actuator (Item: 55) 28
6.8.3 VEOX PMO EPDM body and ELASTOMER / ELASTOMER plug seal kits 29
6.8.4 VEOX PMO FKM FP75 body and ELASTOMER / ELASTOMER plug seal kits 29
6.8.5 Reference of greases 29
6.8.6 List of tool case for VEOX PMO valves 30

MAINTENANCE NOTICE
NM-282 Revision 02 Page 3/31 March 2023
1 CHANGE MANAGEMENT
CHANGES
INDEX
DATE
PAGES
INITIALS
Newversion
1
January2023
/
G. BEGAUD
Additionsnote and modificationRef:52 DN1’’ US to 2’’US
2
March2023
14/25/26-27
G. BEGAUD

MAINTENANCE NOTICE
NM-282 Revision 02 Page 4/31 March 2023
2 SAFETY
2.1 IMPORTANT INFORMATION
Always read the maintenance notice before working on the valve
Failure to observe these instructions can result in serious bodily injury or loss of life.
This can also result in less serious injuries or damage to the equipment.
Electricity can result in serious bodily injury or loss of life.
This can also result in less serious injuries or damage to the equipment.
2.2 GENERAL INFORMATION
The following advice is given to ensure optimum use of the equipment.
•The tasks must be performed in the order specified.
•A range of greases for cylinder seals and valve seals has been defined for
be in phase with their nature and the regulations according to the uses (See § 6.8.5).
IMPORTANT
DANGER!
CAUTION!
DANGER!
CAUTION!

MAINTENANCE NOTICE
NM-282 Revision 02 Page 5/31 March 2023
MAINTENANCE NOTICE VEOX PMO Mixproof valves
3 INTRODUCTION
CAUTION: Before carrying out any maintenance work, check with the supervisor that
the installation is stopped and drained (pipes empty and depressurised, pumps stopped,
tanks shut off or empty).
The disassembly process for mixproof valves is divided into two distinct steps.
3.1 DISASSEMBLING THE VALVE: (Extracting the isolation sub-assembly from the body
of the valve).
This operation enables access to the isolation seals (Changing the seals, see § 6.8.6 for
lubrication) and the removal of the pneumatic actuator.
This is a straightforward procedure and can be performed on-site as it does not present
any particular problems.
This is the case in the majority of maintenance operations on this type of valve.
3.2 DISASSEMBLING THE PNEUMATIC (Changing the internal seals).
CAUTION: This operation must be performed using a special tool ensuring that
the necessary precautions are taken. (CAUTION: stressed spring)
NOTE: After carrying out any maintenance work on DEFINOX products it is essential
that you check the correct function of the equipment concerned: tightness, pressure,
etc.
CAUTION: In the lower section of the valve, NEVER BLOCK or RESTRICT the flow
from the LEAKAGE CHAMBER.
CAUTION: Ensure that the lubricants used are compatible with elastomer seals (See
§ 6.9.6).
VEOX PMO
CAUTION!
IMPORTANT
CAUTION!
CAUTION!

MAINTENANCE NOTICE
NM-282 Revision 02 Page 6/31 March 2023
4 DISASSEMBLING THE VALVE
Before starting the disassembly procedure, if the valve is fitted with a signalling unit it may
be necessary to detach the signalling system from the actuator.
4.1 DISMANTLING THE SIGNALLING BOX
Dismantling without disconnection
CAUTION: Before starting any work on the box, it is important to ensure that the
air supply is closed and that the circuit is purged.
Dismantling with disconnection
CAUTION: Before starting any work on the box, it is important to ensure that the
mains supply is switched off, that the air supply is closed and that the circuit is
purged.
To fit and remove box, refer to maintenance notice:
Sorio®box
Maintenance notice
NM-275
CAUTION!
CAUTION!

MAINTENANCE NOTICE
NM-282 Revision 02 Page 7/31 March 2023
4.2 BODY AND PLUG
Supply air to the main air cylinder to relieve the upper clamp collar of the
compression force from the spring.
If a signaling box is installed on the valve, use the box’s air circuit to maneuver the
valve into the open position.
•Unscrew the sensor cam [38].
•Disassemble the upper clamp collar [46].
•Interrupt the air supply to the actuator (the valve returns to a closed position).
•Remove the isolation (pneumatic actuator) assembly [A] from the body of the
VEOX PMO [45].
•Disassemble the lower clamp collar [46] and remove the protector [47].
38
46
46
A
45
47

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4.3 DISASSEMBLING THE VEOX BREAKAWAY ACTUATOR
(to change the seals and rings if required)
•Remove the screws [33] attaching the breakaway actuator body [28].
•Unscrew the lower plug breakaway piston shaft [30].
•Remove the breakaway piston rod [31].
•Remove the breakaway piston [29] from the cover.
•Remove the seals [32] [34] [36] and the ring [35].
•See VEOX breakaway actuator seal kit (Seals kits § 6.8.1).
32
33
35
31
28
36
34
30
29

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4.4 DISASSEMBLING VEOX PMO LOWER PLUGS
•Screw the protection screw [79] onto the actuator rod [1] to protect the tapped hole.
•Using a plug valve wrench [75] on the lower plug side [58] and the holding wrench
[77] on the flats on the actuator rod side [1], unscrew the lower plug sub-assembly
of the pneumatic actuator [55]. (See drawing below)
LOWER PLUG TOOLS
Diameter
DN1’’ US
DN1’’1/2 – 2’’ US
DN2’’1/2 – 3’’ US
DN4’’ US
Plug valve wrench [75]
No. 7141988
No. 7141979
No. 7142224
Holding wrench [77]
No. 7142226
Protection screw [79]
No. 7190769
No. 7190770
•Using the flats on the lower valve shaft [57] (In a vice with protective clamping jaws or
with an open-end wrench) and a ratchet wrench, loosen the lock nut [66].
•Using the plug valve wrench [75] on the plug side and the flats on the breakaway
piston side [57]. (In a vice with protective clamping jaws or with an open-end wrench),
unscrew the lower valve nut [65] from the shaft [57] to separate the lower valve
assembly. (See drawing below).
•Remove the O ring seals [59] and [61]. (To change the seals if necessary)
•When removing the O-ring seal [59], also remove the insert [60] and retain it for
insertion in the new seal.
CAUTION!
75
59
8
57
60
and
65
66
61
77
55
1
58
75
79

MAINTENANCE NOTICE
NM-282 Revision 02 Page 10/31 March 2023
4.5 DISASSEMBLING THE VEOX PMO UPPER SEAL SUPPORT PLATE AND PLUGS:
•Unscrew the 2 fastening screws [40] in order to remove the lantern protection plate
[39].
•Unscrew the indexing screw [52].
•Unscrew the two fastening screws [51].
•Remove the clamp collar [50] from the lantern [9].
•Next, remove the upper plug [53].
•Remove the seal support plate [41] from the lantern.
•Remove and replace faulty seals: ring [42], upper plug seal [44], body seal [43].
9
42
41
44
43
53
51
50
39
40
52

MAINTENANCE NOTICE
NM-282 Revision 02 Page 11/31 March 2023
4.6 DISASSEMBLING THE MAIN PNEUMATIC ACTUATOR
•Disassemble the air pipes [13] and [14] from the upper plug supply.
•Position the actuator sub-assembly [55] on the press. (See drawing below).
•Ensure that the stroke of the press is adapted to dimensions [A] and [B].
•Use a tube [C] to prevent damage to the upper part of the actuator lantern [55].
•Press the springs to release the snap-ring [15].
•Remove the snap-ring [15] from its housing using a screwdriver, then release
the pressure.
•Remove the sub-assembly for the lantern/rod/piston [6] [7] [8] [9], the stop [10],
the shaft/main actuator [1] [3] [5], the springs [20] and [23] from the actuator body [2].
Diameter
DN1’’ to 2’’ US
DN2’’1/2 – 3’’ US
DN4’’ US
Maximum compression A
(mm)
182
214
263
Minimum expansion B
(mm)
361
427
442
Ø Tube (mm) C
external Ø:
82 maximum
internal Ø:
66 minimum
external Ø:
107 maximum
internal Ø:
80 minimum
external Ø:
120 maximum
internal Ø:
80 minimum
6
C
2
13
14
15
55
9
15
8
7
10
20
1
23
2
5
3

MAINTENANCE NOTICE
NM-282 Revision 02 Page 12/31 March 2023
4.7 DISASSEMBLING THE LANTERN SUB-ASSEMBLY
•Hold the clamp pin [8] with the clamp pin guide [78] held in a vice.
•Unscrew the breakaway piston nut [6] using a plug valve wrench [76].
•Release the nut [6], the breakaway piston [7] and the clamp pin [8] on the lantern
assembly [9].
Diameter
DN1’’ to 2’’ US
DN2’’1/2 to 4’’ US
Plug valve wrench nut [76]
No. 7141988
No. 7141989
Clamp pin guide [78]
No. 7193222
76
8
78
6
7
9
8

MAINTENANCE NOTICE
NM-282 Revision 02 Page 13/31 March 2023
4.8 DISASSEMBLING THE SHAFT/PISTON SUB-ASSEMBLY
•Screw the protection screw [79] onto the actuator rod [1] to protect the tapped hole.
•Release the set screw [4] on the nut [3].
•Unscrew the main piston [5] screw [3] using a plug valve wrench [76]
and the holding wrench [77].
•Release the main piston [5] screw [3] and remove the valve actuator shaft [1].
SHAFT-PISTON DISASSEMBLY TOOLS
Diameter
DN1’’ to 2’’ US
DN2’’1/2 to 4’’ US
Plug valve wrench nut [76]
No. 7141988
Holding wrench [77]
No. 7142226
Protection screw [79]
No. 7190769
No. 7190770
4
3
5
1
77
76
79

MAINTENANCE NOTICE
NM-282 Revision 02 Page 14/31 March 2023
5 REASSEMBLING THE VEOX PMO VALVE
5.1 REPLACING FAULTY COMPONENTS OR SEALS ON THE PLUGS
5.1.1 CHANGING THE PLUG SEALS ON THE VEOX PMO PLUGS.
CAUTION: It is essential that you disassemble the lower plug before replacing
the seals located on the upper plug.
NOTE: Please consult the lubrication manual NDT-020, to know the applications for
lubricating the parts.
•Before replacing faulty seals (see list of seals and kits at the end of the notice),
grease the seals with a suitable lubricant.
•For the process seals [63] in contact with the product use a food grade silicone
grease (Paraliq 703 GTE type, see § 6.8.5).
•For the dry-mounted external seals [64] of the upper plug [53].
•It is essential that the seals [64] is not twisted when mounting.
•Be sure to distribute the volume of the seal into the groove to provide a uniform
contact surface around its entire rim.
•Remove the O-ring seal [63] as well as the ring [62]. (If a replacement is required,
see parts reference at the end of this notice).
CAUTION!
53
62
64
63
IMPORTANT

MAINTENANCE NOTICE
NM-282 Revision 02 Page 15/31 March 2023
•Before replacing faulty seals on the lower plug. (See list of seals and kits at the
end of the notice)
•Dry fit the seal [59] on the insert [60] and fit the lightly greased assembly between
marks [57] and [58]. Make sure it is concentrically mounted on the plug.
•Fit the seal [61] between the marks [57] and [65].
•Tighten the lower plug nut [65] using the plug valve wrench [75] and the retaining flats
on the actuator rod side [57]. (Preferably in a vice with protective jaws or failing
that with an open-end wrench as a last resort).
•Tighten the lower valve nut [65] on the shaft [57] until the shaft and the lower valve
[58] until a metal/metal contact is achieved.
•Screw and tighten the lock nut [66] so that it comes into metal/metal contact with the
lower valve nut [65].
Diameter
DN1’’ US
DN1’’1/2 – 2’’ US
DN2’’1/2 – 4’’ US
Plug valve wrench [75]
No. 7141988
No. 7141979
No. 7142224
58
57
61
59
75
60
65
66

MAINTENANCE NOTICE
NM-282 Revision 02 Page 16/31 March 2023
5.1.2 REASSEMBLING THE VEOX PMO SHAFT/PISTON ASSEMBLY
•Remove the O-ring seals [19] and [21] (If a replacement is required, see parts
reference at the end of this notice),lubricate the seals with grease.
(4025 H1 QUINPLEX type by Lubrication Engineers, see § 6.8.5)
•Remove the rings [18] and [22] (If a replacement is required, see parts reference
at the end of this notice). Ref.: [18] Assembled only on DN2’’1/2 to 4’’ US.
•After replacing the seals and rings, reassemble the shaft [1] in the main piston [5].
•Screw the protection screw [79] onto the actuator rod [1] to protect the tapped hole.
•Tighten the nut [3] using a plug valve wrench nut [76] and the holding wrench [77].
•Then lock the set screw [4].
SHAFT-PISTON REASSEMBLY TOOLS
Diameter
DN1’’ to 2’’ US
DN2’’1/2 to 4’’ US
Plug valve wrench nut [76]
No. 7141988
Holding wrench [77]
No. 7142226
Protection screw [79]
No. 7190769
No. 7190770
19
18
5
3
4
1
21
22
77
76
79

MAINTENANCE NOTICE
NM-282 Revision 02 Page 17/31 March 2023
5.1.3 REASSEMBLING THE VEOX PMO LANTERN ASSEMBLY
•Remove the O-ring seals [11], [16], [17] and [27] (If a replacement is required,
see parts reference at the end of this notice),lubricate the seals with grease.
(4025 H1 QUINPLEX type by Lubrication Engineers, see § 6.8.5)
•Remove the rings [12] and [26] (If a replacement is required, see parts reference
at the end of this notice).
•After replacing the seals and rings, position the protector [73] on the thread of the
clamp pin [8].
•Insert the clamp pin [8] in the lantern [9] and the breakaway piston [7].
•Remove the protector [73] to tighten the nut [6] on the thread of the clamp pin [8].
•Use the clamp pin guide [78] and the plug valve wrench [B] to tighten the assembly.
(See table below)
Diameter
DN1’’ to 2’’ US
DN2’’1/2 to 4’’ US
Valve protector [73]
No. 7141886
No. 7141887
Plug valve wrench [76]
No. 7141988
No. 7141989
Clamp pin guide [78]
No. 7193222
76
B
78
6
12
17
16
9
73
26
27
8
11
7
12
11

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5.1.4 REASSEMBLING THE VEOX PMO ACTUATOR ASSEMBLY
•Tighten the guides [74] and [72] on the shaft [1]. (See table and drawing below).
•Position the spring [23] on the body [2], reassemble the shaft/piston assembly
on the spring [23], position in the spring assembly [20] and thread the lantern
assembly on the guide [74]. (See drawing below).
•Mount the assembly on the press to position the snap-ring correctly [15].
(For press strokes see page 11, ditto disassembly).
•Reassemble the connectors [13] and [14] on the lantern [9]. (Be sure to check
the alignment of the connectors, see drawing below).
•
VALVE ACTUATOR ASSEMBLY TOOLS
Diameter
DN1’’ to 2’’ US
DN2’’1/2 to 4’’ US
Clamp pin guide [74]
No.7190943
No. 7190944
Actuator body guide [72]
No. 7142227
No. 7142228
14
15
9
74
1
20
23
72
2
When reassembling, align the air connection holes
13

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NM-282 Revision 02 Page 19/31 March 2023
5.1.5 REFITTING THE VALVE ASSEMBLY ON THE VEOX PMO BODY
•Check that the old seal [49] has been removed.
•Lubricate the interior diameter of the new seal [49]
with auxiliary silicone grease (Kluber Paraliq GTE
703 type).
•Fit the seal [49] in the lower part of the valve body.
•(It must hold on its own and the entire perimeter of
the upper toric part of the seal must be visible
when looking into the body through the upper
opening).
•Insert the protector [47] into which you have
placed the lubricated segment [48] (Kluber Paraliq
GTE 703 type) into its inside diameter, until it
touches the seal [49].
•Place the lower clamp collar [46] around the body
[45] and the protector [47] "WITHOUT
TIGHTENING" the collar (you must still be able to
rotate the guide and collar).
•Insert the isolating assembly [58] via the upper
opening, ensuring that no seal (old or new) has
been forgotten.
•Screw in the detection cam [38].
•Fix the Sorio casing to its related valve and
connect its pneumatic Rilsans to the actuator
connectors.
•Manually operate the main actuator control
solenoid valve 1 in order to place the valve in the
open position.
•Place the upper clamp collar [46] around the body
[45] and the lantern of the isolating assembly and
tighten it by distributing the tightening force over
the two diametrically opposed screws (tap on the
collar with a hammer), the tightening torque of
the clamp collars is 10 Nm.
•Manually operate the main actuator control
solenoid valve 1 in order to return the valve in the
closed position.
•Tighten the lower collar with the same precautions
as the upper one. (Check via the openings of the
upper and lower clamp collars that the two
tightened parts have a good metal/metal contact
for the correct alignment of the guides)
•Check the strike of the upper and lower valves by
manually acting on the pulse controls for solenoid
valves 2 and 3. Ensure that the LEDs of the AS-i
module light up for the desired sensing position.
•Open and close the valve fully two or three times
via solenoid valve 1, checking that the sensors
indicate the O and C positions and that the valve
operates smoothly in both directions.
•Position and close the housing cover.
38
47
48
46
45
46
49
Isolating
assembly

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6 VEOX PMO SPARE PARTS
6.1 SPARE PARTS FOR VEOX PMO BREAKAWAY SUB-ASSEMBLY (Seal kits § 6.8.1)
33
32
31
28
37
36
29
34
30
35