Flowserve FlowTop V726 Manuale utente
Disassembly / Reassembly Instructions
FlowTop
V726, V738, V740
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AI - FlowTop
Contents Page
1. Purpose 3
2. Use 3
3. Description of the Procedure 3
4. Disassambling the Valve 3 - 4
5. Subassembly - Body 5 - 28
6. Subassembly - Trim 30 - 32
7. Subassembly - Bonnet 34 - 59
8. Subassembly - Packing 61 - 62
9. Technical Tables - Tightening Moments 64 - 65
10. Special Tools 67
CAUTION !
The Control Valve must only be disassembled and reassembled by qualied sta. Qualied sta is
dened as personnel who are familiar with the disassembling, reassembling, installation and commis-
sioning of this product and possess the relevant qualications in their eld of activity.
Follow the relevant Installation and Operating Instructions during installing, commissioning and oper-
ating !
Follow these Disassembly / Reassembly Instructions and only use original Spare Parts, as well as the
recommended Special Tools in order to guarantee perfect function and reliablity of this product.
Failure to comply with these Disassembly and Reassembly Instructions will render the manufacturer's
guarantee and liability null and void. Unless otherwise agreed, the manufacturer's General Terms and
Conditions of Sale shall apply.
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1. Purpose
These instructions give guidelines on valve repair.
2. Use
Type: FlowTop Valve Type: V726
V738
V740
3. Description of the Procedure
CAUTION !
Only remove the Control Valve from the pipe in a depressurised and cooled / heated
state !
3.1 Disconnect air supply from the assembled accessories or actuator
3.2 Disassembling any accessories assembled
3.3 Disassembling the actuator from the valve
CAUTION !
In the event that the control valve is contaminated by toxic operating media, it must
be cleaned using the best possible available procedure !
Thepotentialhazardsourcesareundertheoperator'sinuence.Hemusttherefore
observe the national and international environmental conditions for removal from the
pipe and cleaning ! The permissible limit values are to be kept as suitable protective
measures and the service personnel are to be instructed.
3.4 Before disassembling:
• Are suitable securing devices available ?
The valve is "barrel shaped" and has a tendency to tip ! This can lead to injuries or damage !
• Do the recommended Wearing / Spare Parts exist ?
Should these be missing an attempt at repair not be completed successfully !
• Are suitable tools available ?
Improper use of tools can lead to damage the parts. It is possible that the valve is not working !
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AI - FlowTop
Data Field 1
The series number is in this eld. It is made up
e.g. as follows:
0620278001001
062 06 = Calendar year 2006
2 = Order ( 1 = Quotation )
0278 = consecutive series number
001 = Item within the series number
001 = ascending quantity within the item
The series number and the "part" required must
always be quoted when ordering Spare Parts.
Alternatively you can order using the part no. in
the Spare Parts List at your own risk.
Telephone: 0043 4242 41181 - 0
e-mail: schmidt@owserve.com
Data Field 2 and 3
These elds clearly identify the:
• Body Type (Page 5)
• Trim Type (Page 30 - 32)
• Bonnet Type (Page 34 - 36)
• Packing Type (Page 61 - 62)
marked in detail. This helps you to nd the steps
described at the end.
Rating plate "Type IT"
Rating plate "Type PB"
4. Disassembling the valve
4.1 Fix the valve on the disassembly table !
4.2 Identify the valve using the rating plate:
A rating plate is tted on every control valve for identi cation. In principle there are
two di erent rating plates, their information content is however identical.
• Rating plate "Type IT" for pneumatic linear actuators with internal air conduction.
• Rating plate "Type PB" for pneumatic linear actuators with external air conduction.
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AI - FlowTop
Body Type Data Field 2 Data Field 3 Page
Three Flange V7xx DxVNA - 7 - 9
Four Flange V7xx VxVNA - 11 - 15
Mixing V7xx WxVNA MOTP2LG 17 - 21
Distributing V7xx WxVNA VOTP2LG 23 - 28
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AI - FlowTop
7
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AI - FlowTop
Disassembly
Step 01
• Unscrew hexagon nuts (1.4)
Reassembly
Step 01
• Grease stud screws
CAUTION !
Lubrication as per Table 06 (Page 65)
• Screw hexagon nuts in place (1.4) and tighten in a
diagonally opposite sequence using the torque wrench
CAUTION !
Nut tightening moment (1.4)
as per Table 01 (Page 64)
When tightening the nuts pay attention to the
alignment of the plug ( do not rub or insert the
plug in the open / closed movement )
• Tighten the hexagon nuts of the gland (3.6)
using the torque wrench
CAUTION !
Tightening moment of the hexagon nuts (3.6)
as per Variant drawing (Page 61 - 63)
Three Flange Valve
SPM - Code : V7xx DxVNA
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AI - FlowTop
Disassembly
Step 02
• Unscrew hexagon nuts (3.6)
• Remove washer (3.8) and gland fl ange (3.4)
Reassembly
Step 02 not applicable
Arranging the packing unit see Step 0 7
Disassembly
Step 03
• Twist Special Tool (Ring-nut) on the stem
and put in place slowly
CAUTION !
Ensure it hangs vertically !
• Remove fl at gasket (1.2)
CAUTION !
Remove remains of fl at gasket (1.2)
in the body and on the bonnet.
Do not damage sealing surface !
Reassembly
Step 03
After work step "Reassembly" Ste p 06
• Insert at gasket (1.2)
CAUTION !
Usenewatgasket(1.2)!
• Twist Special Tool (Ring-nut) on the stem
and put in place slowly
CAUTION !
Ensure it hangs vertically !
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AI - FlowTop
Reassembly
Step 04
• Insert Special Tool (change seat - tool) in the body
(Ensure that the pin clicks in place!) and tighten using the
torque wrench
CAUTION !
Tightening moment for the screwed seat (2.1)
as per Table 02 (Page 64).
Disassembly
Step 04
• Insert Special Tool (change seat - tool) in the body
(Ensure that the pin clicks in place!) and remove using a
suitable tool
Disassembly
Step 05
• Remove screwed seat (2.1) and profi le ring (2.5)
CAUTION !
Remove profi le ring remains (2.5) in the body.
Do not damage sealing surface !
Reassembly
Step 05
Reassembly takes place in reverse order.
CAUTION !
Clean parts
Check screwed seat, thread in the body and
sealing surface for damage.
Usenewprolering(2.5)!
• Insert pro le ring (2.5) in the body, grease the thread
screwed seat (2.1) and screw in by hand
CAUTION !
Lubrication as per Table 06 (Page 65)
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AI - FlowTop
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