VAT 541 Series Assembly instructions

Installation, Operating &
Maintenance Instructions
291187ED
Edition
2015
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«Easy close» all-metal angle valve
with manual actuator
Series 541
DN 16 – 63 mm (I. D. ⅝" – 2½")
This manual is valid for the following product ordering numbers:
54124- . E02 - ....
54132- . E02 - ....
54136- . E02 - ....
Sample picture

Series
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Imprint
Manufacturer
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Website:
Phone:
Fax:
Email:
www.vatvalve.com
[phone]
[phone]
[email protected]om
Publisher VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Editor VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Print VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Copyright © VAT Vakuumventile AG 2015
No part of these instructions may be reproduced in any way (photo-
copies, microfilms or any other reproduction processes) nor may it be
manipulated with electronic systems, duplicated or distributed without
written permission from VAT. Offenders are liable to pay damages.
The original VAT firmware and updated state of the art versions of the
VAT firmware are intended for use with VAT products. The VAT firmware
contains a limited, time unlimited user license. The VAT firmware may not
be used for purposes other than those intended nor is it permitted to
make copies of the VAT firmware. In particular, it is strictly forbidden to
give copies of the VAT firmware to other people.
The use of trade names, brand names, trademarks, etc. in these
Instructions does not entitle third parties to consider these names to be
unprotected and to use them freely. This is in accordance with the
meaning of the laws and acts covering brand names and trademarks.

Series 541
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Contents
1 Description of product........................................................................4
1.1 Identification of product....................................................................................4
1.2 Use of product.................................................................................................4
1.3 Related documents..........................................................................................4
1.4 Important information.......................................................................................4
1.5 Technical data.................................................................................................4
2 Safety ...................................................................................................5
2.1 Compulsory reading material...........................................................................5
2.2 Danger levels ..................................................................................................5
2.3 Personnel qualifications...................................................................................6
2.4 Safety labels....................................................................................................6
3 Design and Function...........................................................................7
3.1 Design.............................................................................................................7
3.2 Function..........................................................................................................8
4 Installation...........................................................................................9
4.1 Unpacking.......................................................................................................9
4.2 Installation into the system.............................................................................10
4.2.1 Preparation for installation .................................................................10
4.2.2 Mounting to the system......................................................................12
5 Operation...........................................................................................13
5.1 Normal operation...........................................................................................13
5.2 Operation under increased temperature.........................................................13
5.3 Trouble shooting............................................................................................14
6 Maintenance ......................................................................................15
6.1 Maintenance intervals....................................................................................15
7 Repairs...............................................................................................16
7.1 Replacement of dynamic seal – FLEX VATRING...........................................17
8 Dismounting and Storage.................................................................21
8.1 Dismounting..................................................................................................21
8.2 Storage .........................................................................................................21
9 Packaging and Transport.................................................................22
9.1 Packaging .....................................................................................................23
9.2 Transport.......................................................................................................23
10 Disposal.............................................................................................24
11 Spare parts ........................................................................................25

DESCRIPTION OF PRODUCT Series
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1 Description of product
1.1 Identification of product
The fabrication number is engraved directly on the product.
Fabrication number
1.2 Use of product
Use product for clean and dry vacuum applications only. Other applications are only allowed
with the written permission of VAT. Suitable for XHV applications.
1.3 Related documents
•Product data sheet
•Dimensional drawing
1.4 Important information
This symbol points to a very important statement that requires particular
attention.
Example
:
VAT disclaims any liability for damages resulting from inappropriate packaging.
1.5 Technical data
See product data sheet and dimensional drawing.
Weights of standard valves:
DN 16: 0.4 kg
DN 40: 1.9 kg
DN 63: 6 kg
Weight of special valves, see product data sheet.

Series 541 SAFETY
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2 Safety
2.1 Compulsory reading material
Read this chapter prior to performing any work with or on the product. It contains important
information that is significant for your own personal safety. This chapter must have been
read and understood by all persons who perform any kind of work with or on the product
during any stage of its serviceable life.
NOTICE
Lack of knowledge
Failing to read this manual may result in property damage.
Firstly, read manual.
These Installation, Operating & Maintenance Instructions are an integral part
of a comprehensive documentation belonging to a complete technical
system. They must be stored together with the other documentation and
accessible for anybody who is authorized to work with the system at any
time.
2.2 Danger levels
DANGER
High risk
Indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
WARNING
Medium risk
Indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
CAUTION
Low risk
Indicates a hazardous situation which, if not avoided, may result in minor or
moderate injury.
NOTICE
Command
Indicates a hazardous situation which, if not avoided, may result in property
damage.

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2.3 Personnel qualifications
WARNING
Unqualified personnel
Inappropriate handling may cause serious injury or property damage.
Only qualified personnel are allowed to carry out the described work.
2.4 Safety labels
Label Part No. Location on valve
T-9001-155 On protective covers of
flanges
Table 2-1

Series 541 DESIGN AND FUNCTION
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3 Design and Function
3.1 Design
With manual actuator:
Type 541 … - . E02 - ….
1 Actuator
2 Valve body
3 Connecting
flange
4 Sealing surface
Figure 3-1

DESIGN AND FUNCTION Series
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3.2 Function
Valve is closed and opened manually.
Closing: Turn hexagon head or inner square clockwise to its stop. For moving the plate
only a small closing torque is required. Then a second step with a steadily increasing torque
(sealing the valve) will follow until the stop is reached.
Opening: Turn hexagon head counter clockwise to its stop. The valve is completely open
when the stop is reached.
Figure 3-2 1 FLEX VATRING
2 Bonnet seal
3 Bellows
Valve seat side
1
3
2

Series 541 INSTALLATION
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4 Installation
WARNING
Unqualified personnel
Inappropriate handling may cause serious injury or property damage.
Only qualified personnel are allowed to carry out the described work.
4.1 Unpacking
•Make sure that the supplied products are in accordance with your order.
•Inspect the quality of the supplied products visually. If it does not meet
your requirements, please contact VAT immediately.
•Store the original packaging material. It may be useful if products must be
returned to VAT.
Don’t open the plastic bag before mounting into the system.
NOTICE
Sensitive product
Valve parts may get damaged.
–
When lifting the valve, pay attention that the valve does not touch any solid
objects.
–
Lift valve carefully and put it down on a clean surface or mount it to a clean
system.
Weight of standard valves; see chapter «1.5 Technical data».

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4.2 Installation into the system
NOTICE
Contamination
Product may get contaminated.
Always wear cleanroom gloves when handling the product.
NOTICE
Force effect from other components of the system
Valve body may get deformed and/or malfunctions may occur.
– Do not use valve to support other components.
– Make sure that forces from other components do not impair the valve;
use bellows sections, for instance.
4.2.1 Preparation for installation
WARNING
Danger of injury in case of insufficient skills
Inappropriate handling may cause serious injury or property damage.
Make sure that the valve does not topple or fall down while removing the
protective covers from the flanges.
NOTICE
Sensitive product
Valve parts may get damaged.
When removing the protective covers from the flanges, be careful to avoid
damage to the valve.

Series 541 INSTALLATION
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1. Remove plastic bag.
2. Remove protective covers (1); see «Figure 4-1».
1 Protective covers
Figure 4-1
Store protective covers. They may be useful when valve needs to be
repacked.
3. Clean sealing surfaces; see «Figure 3-1» on page 7, with cleanroom wiper soaked with
pure alcohol (Isopropanol).
4. Clean sealing surface with clean, oil free compressed air.

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4.2.2 Mounting to the system
1. Mount valve to your system by using appropriate flange screws
(different quantity of screws required – depending on valve size).
2. Mount screws evenly in crosswise order until the seal touches the sealing surface.
3. Tighten all screws with the torques appropriate for the property classes of the screws.
1 Flange A (valve seat side)
2 Flange B
3 Screw holes
Figure 4-2

Series 541 OPERATION
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5 Operation
WARNING
Unqualified personnel
Inappropriate handling may cause serious injury or property damage.
Only qualified personnel are allowed to carry out the described work.
5.1 Normal operation
Valve is closed and opened manually.
Closing: Turn hexagon head or inner square clockwise to its stop. For moving the plate only
a small closing torque is required. Then a second step with a steadily increasing torque
(sealing the valve) will follow until the stop is reached.
The sealing force of the valve can’t be increased with a higher torque. The
force to seal the valve is supplied by a spring, don’t overtorque.
Opening: Turn hexagon head counter clockwise to its stop. The valve is completely open
when the stop is reached.
If the mechanical stop in open position is reached, no additional torque
should be applied. To prevent any damage, the applied torque in fully open
position must not exceed 15 Nm.
For technical details, see product data sheet.
5.2 Operation under increased temperature
Maximum allowed temperature see product data sheet.
NOTICE
Inconstant temperatures
Performance of the valve may deteriorate.
– Actuate valve only after the bake-out temperature has been stable for two
hours.
– If valve must be actuated during bake-out, make sure that the heating or
cooling rate does not exceed 10 °C per hour in the temperature range
from 100 °C to 300 °C
– Make sure that the temperature differences over the whole body do not
exceed 60 °C.

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5.3 Trouble shooting
Failure Check Action See
Leak at gate Condition of gate
seal Please contact VAT www.vatvalve.com
Condition of
valve gate Please contact VAT www.vatvalve.com
Leak at body Condition of
bonnet seal and
sealing surface Please contact VAT www.vatvalve.com
Condition of
bellows Please contact VAT www.vatvalve.com
Table 5-1
If you need any further information, please contact one of our service centers. You will find
the addresses on our website www.vatvalve.com.

Series 541 MAINTENANCE
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6 Maintenance
6.1 Maintenance intervals
Under clean operating conditions the valve does not require any maintenance during
specified lifetime.
•Impacts from the process may require more frequent maintenance.
•When the valve has reached the specified lifetime; see product data sheet,
we recommend to have it serviced by VAT. Please contact your nearest
VAT service center to get recommendations and an offer. You will find the
addresses on our website www.vatvalve.com.

REPAIRS Series
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7 Repairs
WARNING
Unqualified personnel
Inappropriate handling may cause serious injury or property damage.
Only qualified personnel are allowed to carry out the described work.
WARNING
Danger of injury in case of insufficient skills
Inappropriate handling may cause serious injury or property damage.
Make sure that the valve does not topple or fall down while removing the
protective covers from the flanges.
NOTICE
Contamination
Product may get contaminated.
Always wear cleanroom gloves when handling the product.

Series 541 REPAIRS
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7.1 Replacement of dynamic seal – FLEX VATRING
In case of a seat seal leak caused by environmental influences, the FLEX VATRING seal
can be replaced twice without the need for re-machining the valve seat.
Three seal rings of different diameters enable leak tight sealing on three different levels of
pre-prepared sealing surface provided in the valve body. If there is damage on one level,
the replacement seal ring, of a different diameter, will seal at the next level.
VAT offers a range of service kits; see «Table 11-1» on page 25. The seal exchange is
easily carried out by the user.
Initial sealing system
(maximum seal ring diameter)
Sealing system after installation of the
service kit 1
(intermediate seal ring diameter)
Sealing system after installation of the
service kit 2
(minimum seal ring diameter)
21/1 Valve gate
36/1 Maximum seal ring diameter (Initial seal)
Y1 Intermediate seal ring diameter (Service kit 1)
Y2 Minimum seal ring diameter (Service kit 2)
36/2 Flat seal
60 Holding ring
65 Nut
66 Washer
X1 Washer (Service kit 1)
X2 Washers (Service kit 2)
68 Bonnet screws
A Flange A (valve seat side)
B Flange B
Figure 7-1
21/1
36/1
60
66
65
21/1
Y1
X1
60
66
65
21/1
Y2
X2
60
66
65

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Required material: Service kit 1 or 2
Ordering information: See chapter «11 Spare parts» on page 25
and «Figure 7-1» on page 17
NOTICE
Inappropriate mounting position of valve
Maintenance may be troublesome and parts may drop down.
Ideally dismount valve from the system and put it on a clean workbench with
the actuator upwards.
Procedure:
The item numbers in brackets refer to «Figure 7-1» on page 17.
1. Close valve.
Make sure that the valve is closed to mechanical stop! This is required to
protect the bellows from twisting and the seal ring from sliding.
2. Loosen the nut (65) but don’t remove.
3. Open valve.
Make sure that valve is opened to mechanical stop!
4. Remove bonnet screws (68).
5. Pull valve insert carefully out of the valve body without touching the body wall.
Touching the body wall may cause severe damage to delicate parts of the insert.
6. Remove flat seal (36/2).
If you intend to use the flat seal again, please note/mark the bonnet side of the
seal. This to be able to use the seal in the same orientation again.
7. Remove the nut (65).
8. Remove washer (66).
9. Remove holding ring (60).
10. Remove FLEX VATRING (36/1).
11. Clean sealing surface of plate (21/1) with pure alcohol (Isopropanol), use a cleanroom
wiper.

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Make sure that the sealing surface is free of scratches.
12. Put new FLEX VATRING (Y1 or Y2) on sealing surface of plate (21/1).
Make sure that the seal ring is installed in the correct direction. The marks on
the ring (see figure 7-2) have to point towards the holding ring and not towards
the bellows.
Initial condition
FLEX VATRING (36/1)
without mark
Service kit 1
FLEX VATRING (Y1)
with 1 mark
Service kit 2
FLEX VATRING (Y2)
with 2 marks
Figure 7-2
13. Put 1 washer (X1) for service kit 1 or 2 washer (X2) for service kit 2 on plate (21/1).
14. Put holding ring (60) on plate (21/1).
15. Put washer (66) on plate (21/1).
16. Insert nut 65 and tighten the nut slightly. The seal ring, holding ring and washer should
only slightly be fixed in their position.
17. Level out FLEX VATRING (Y1 or Y2) and plate (21/1) along the whole circumference.
Height difference shall not exceed 0.1 mm. Check height difference accurately at four
spots (measured angle 90°) around the whole circumference.
Figure 7-3
18. Clean sealing surfaces of bonnet and seat of valve body with pure alcohol
(Isopropanol), use cleanroom wiper.

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19. Put the flat seal (36/2) on sealing surface of valve body.
VAT recommends using a new flat seal.
In case of reutilization of the used flat seal please assemble it in the same
direction as removed before.
20. Move valve insert (in open position) carefully into body without touching the body wall.
Touching the body wall may cause severe damage to delicate parts of the insert.
21. Insert all bonnet screws (68) and screw them in until they touch the bonnet flange (do
not tighten).
22. Turn spindle in closing direction until the FLEX VATRING (Y1 or Y2) touches the seal
surface to align the valve insert (do not tighten).
23. Tighten all bonnet screws (68) gradually in crosswise order with the following torques:
DN 16: 2.5 Nm
DN 40: 7 Nm
DN 63: 15 Nm
24. Close valve to mechanical stop!
25. Tighten nut (65) with the following torque:
DN 16: 2.5 Nm
DN 40: 7 Nm
DN 63: 15 Nm
Valve is ready for use.