VAT 168 Series Assembly instructions

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 1/17
Large pendulum valve
This manual is valid for the valve ordering number(s):
16852-.A14/24/34/44
16854-.A14/24/34/44
The fabrication number is indicated on each product as per the label
below (or similar):
made in Switzerland
Fabrication No.: patented . .
168
. .. – . .. . – .. .. /. . ..
A
– ... .. .
Fabrication number
Explanation of symbols:
Read declaration carefully before you start any other
action!
Keep body parts and objects away from the valve
opening!
Attention! Hot surfaces; do not touch!
Product is in conformity with EC guidelines,
if applicable!
Loaded springs and/or air cushions are potential
hazards!
Disconnect electrical power and compressed air
lines. Do not touch parts under voltage!
Wear gloves!
Read these «Installation, Operating & Maintenance Instructions» and the enclosed «General
Safety Instructions» carefully before you start any other action!

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 2/17
Imprint:
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Manufacturer
Website
www.vatvalve.com
Phone
[phone]
Fax
[phone]
Email
[e-mail]
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 2008
No part of these Instructions may be reproduced in any way (photocopies, 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.

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 3/17
Contents:
1Use of product .......................................................................................................................................................... 4
1.1 Technical data.................................................................................................................................................... 4
2Installation................................................................................................................................................................. 5
2.1 Unpacking.......................................................................................................................................................... 5
2.2 Installation into the system................................................................................................................................. 6
2.3 Admissible forces............................................................................................................................................... 6
2.4 Connections....................................................................................................................................................... 7
2.4.1 Compressed air connection..................................................................................................................... 7
2.4.2 Electrical connection................................................................................................................................ 7
3Operation.................................................................................................................................................................. 8
3.1 Normal operation................................................................................................................................................ 8
3.2 Operation under increased temperature............................................................................................................ 8
3.3 Behavior in case of compressed air pressure drop............................................................................................ 8
3.4 Behavior in case of power failure....................................................................................................................... 8
3.5 Emergency operation at power failure ............................................................................................................... 9
4Trouble shooting....................................................................................................................................................... 9
5Maintenance & repairs............................................................................................................................................ 10
5.1 Safety instruction.............................................................................................................................................. 11
5.2 Maintenance procedures.................................................................................................................................. 12
5.2.1 Cleaning and replacing procedure of gate and bonnet seal..................................................................12
5.2.2 Replacement of locking balls................................................................................................................. 13
6Drawing................................................................................................................................................................... 15
6.1 Mechanism Assembly Drawing........................................................................................................................ 16
7Spare parts............................................................................................................................................................. 17
8Warranty................................................................................................................................................................. 17

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 4/17
1 Use of product
Use product for clean and dry indoor vacuum applications under the conditions indicated in chapter «Technical data» only!
Other applications are only allowed with the written permission of VAT.
1.1 Technical data
Pressure range 1x10-7 mbar to 1.2 bar (abs)
Leak rate at body and valve seat < 1x10-9 mbar ls -1
Max. differential pressure at opening 30 mbar
Differential pressure on the gate 1.2 bar in either direction
Cycles until first service
- Open / Close 100’000 cycles 1)
Admissible temperature2)Valve body ≤120°C (static i.e. plate not actuated)
≤80°C (dynamic i.e. plate actuated)
Actuator ≤80°C
Position indicator ≤80°C
Solenoid ≤50°C
Position indicator Contact rating ≤250 V AC
≤6 A
Solenoid see tag on solenoid
Materials Valve body G-AlSi7Mg
Gate, counter-plate AIMgSi1
Mechanism AISI 301 (1.4310), AISI 303 (1.4305)
AISI 420 (1.4034), AISI 304 (1.4301)
AISI 52100 (1.3505)
Weight valve DN400 DN500
90.5kg (187 lbs) 120.5 kg (265 lbs)
Weight components DN 400 DN 500
Body 30 Kg (66 lbs) 42 Kg (93 lbs)
Bonnet 16 Kg (35 lbs) 24 Kg (53 lbs)
Mechanic 25 Kg (55 lbs) 31 Kg (69 lbs)
Mounting position any
1) Under room temperature and clean conditions
2) Maximum values: depending on operating conditions and sealing materials

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 5/17
2 Installation
2.1 Unpacking
Open the box and install appropriated certified lifting eye bolts at the threads which are indicated in
the valve drawing with the symbol . (Appropriate lifting eye bolt kit from VAT: P/N: 392932)
VAT recommends to install three eye bolts as shown in the picture below
Remarks: At some valve configurations the valve will already come with appropriate eye bolts
installed
ATTENTION: Not appropriate lifting eye blots or installation of the lifting eye bolts at the wrong
location at the valve can result in serious human safety issues
Install appropriate lifting strips and lift the crane hook slowly until the strips are under pull force. Keep
lifting the hook and move the hook step by step in direction center of gravity until the valve is in
horizontal position. Lift the valve out off the box and move it forward to the mounting chamber flange
Open the box Install appropriate lifting eye bolts
Lift the valve out off the box

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 6/17
2.2 Installation into the system
1. Clean the sealing surface and the O-ring seal of the mating flange.
2. Move the pendulum valve in the correct mounting position with the crane. ATTENTION: Do not hit the sealing
surfaces during manipulation!
3. Set 2 screws in one line
4. Set two additional two screws 90° to the line which is build by the first two screws.
5. Fasten the 4 screws crosswise until the O-ring seal gets in contact with the valve sealing surface.
6. Apply all remaining screws
7. Fasten all screws gradually in crosswise order. Suggested admissible torque for A2-50 screws with a friction
coefficient of 0.1 see table below. (calculated screw pre load bellow is approx. 80% to 90%)
DN (nom. I.D.) Tightening torque
ISO JIS ASA
mm inch
Torque
<Nm> Torque <ft lbs> Screw
size Torque
<Nm> Torque <ft lbs>
Screw
size Torque
<Nm> Torque <ft lbs> Screw size
400 16 19-21 14-16 M12 47-53 35-39 M16 - - -
500 20 19-21 14-16 M12 47-53 35-39 M16 - - -
- ANSI 14.0 - - - - - - 68-77 50-57 ¾” UNC
- ANSI 16.0 - - - - - - 160-180 118-132 1” UNC
- ANSI 18.0 - - - - - - 160-180 118-132 1” UNC
- ANSI 20.0 - - - - - - 160-180 118-132 1” UNC
2.3 Admissible forces
Forces from evacuating the system and from the weight of other components can lead to deformation of the valve body
and to malfunction of the valve. The stress has to be relieved by suitable means, e.g. bellows sections. The following
forces are admissible:
DN (nom. I.D.) Axial tensile or
compressive force «FA» Bending moment «M»
mm inch N lbf Nm
lbf .ft
400 16 7840 1760 980 722
500 20 8820 1980 1078 800
If a combination of both forces («FA» and «M») occurs, the values mentioned
above are invalid. Please contact VAT for more information.

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 7/17
2.4 Connections
2.4.1 Compressed air connection
Connect compressed air only if
- valve has been installed to the vacuum system
- moving parts cannot be touched
With solenoid: Connect compressed air to the IN port of the solenoid (internal thread R 1/8“; 1/8”
NPT for USA)
Without solenoid: Connect compressed air to the OPEN and CLOSE port at the valve actuator
(internal thread 1/8“ ISO/NPT)
Compressed air pressure (min. - max. overpressure): 5 - 7 bar / 75 - 100 psig
Use clean, dry or slightly oiled air only!
2.4.2 Electrical connection
Do not touch any electrically charged parts!
Connect electrical power only if
- valve has been installed to the vacuum system
- moving parts cannot be touched
Verify that mains voltage matches voltage stated on the solenoid! Sockets for position indicator and
solenoid are supplied with the valve.
Wire solenoid and position indicator according to the following diagrams:
Standard Solenoid Impulse solenoid (optional)
MV
2
1
power 2
1
2
1
close
open
1
2
power
2
1
1
2
MV
MV
MV1 = coils solenoid MV1 = coils solenoid

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 8/17
Position Indicator Double Position Indicator
1
2
3
4
5
6
1
2
6
5
4
3
Lo
Lg
C (3)
A (1)
B (2)
J (9)
G (7)
H (8)
D (4)
F (6)
E (5)
K (10)
M (12)
A B
C
D
E
G
H J K
L
M
F
L (11)
Lo
Lo
Lg
Lg
Lo = position indicator « OPEN»
Lg = position indicator « CLOSE»
Lo = position indicator « OPEN»
Lg = position indicator « CLOSE»
3 Operation
3.1 Normal operation
Valve is opened and closed by means of compressed air.
3.2 Operation under increased temperature
Cycling under temperatures above room temperature may reduce the number of cycle until first service.
VAT recommends an exchange of the locking balls after 50’000 cycles if the valve is cycled above room temperature. (see
capture 5 to replace locking balls)
3.3 Behavior in case of compressed air pressure drop
Valve closed: valve remains closed
Valve open: valve position is undefined
3.4 Behavior in case of power failure
Standard solenoid: valve will close
Solenoid for impulse actuation (option): valve position does not change, but movement will be completed

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 9/17
3.5 Emergency operation at power failure
In case of a power failure, the valve can be actuated manually if compressed air is available.
Standard solenoid Solenoid for impulse actuation (option)
Press push-button: valve opens
Release push-button: valve closes
Press push-button on the left: valve opens
Press push-button on the right: valve closes
4 Trouble shooting
Valve does not close/open: Power available?
Compressed air available?
Solenoid defective?
Check voltage!
Check air pressure!
Leak at gate: Clean valve seat and gate seal!
Replace gate seal, if damaged!
Correct air pressure?
Leak at body: Flanges leak tight?
Screws at upper part of body tightened?
Replace bonnet seal!
If you need any further information, please contact one of our service centers. You can find the addresses on our website:
http://www.vat.ch

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 10/17
5 Maintenance & repairs
Under clean operating conditions, the valve does not require any maintenance during the specified cycle life.
Contamination from the process may influence the function and requires more frequent maintenance.
Before carrying out any maintenance or repairs, please contact VAT. It has to be individually decided whether the
maintenance/repair can be performed by the customer or has to be carried out by VAT. The fabrication number on the
valve
made in Switzerland
Fabrication No.: patented . .
. . . . . – . . . . – . . . . / .. . .
A
– . . . . . .
Fabrication number
has always to be specified.
All supplies (e. g. compressed air, electrical power) must be disconnected for removal/installation of the valve from/into
the system and for maintenance work.
Even with disconnected supply, loaded springs and/or air cushions in cylinders can be potential hazards.
Keep fingers and objects away from the valve opening!
Products returned to VAT must be free of harmful substances such as e.g. toxical, caustic or microbiological ones. If
products are radioactively contaminated, fill in the VAT form «Contamination and Radiation Report» and send it with the
product. The form is available at VAT. The maximum values indicated in the form must not be exceeded.

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 11/17
2.
5.1 Safety instruction
WARNING
Serious personal safety hazard by air pressure loaded plugs
The plug #1 or #2 can be catapulted out during manipulation at the plugs at pressurized
actuator
Do not turn or remove plug #1 or #2. (see pictures below)
For all service or repair reasons at the actuator always contact VAT
1.
1. 2.

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 12/17
5.2 Maintenance procedures
5.2.1 Cleaning and replacing procedure of gate and bonnet seal
(Numbers in brackets refer to the picture on page 15 and 16)
1. Vent the camber on each side of the valve to atmosphere
2. Move the gate of the valve to the open position by applying compressed air to the open port
3. Disconnect complete air supply to the valve
4. Disconnect electrical main supply to the valve
5. ATTENTION: Heavy bonnet cover (2/1)! In advance of the following steps make sure, that the bonnet cover is
securely supported to prevent any hazard due to the heavy weight of the bonnet cover. Use the attachments
points indicated in the drawing on page 15 to mount eye bolts for lifting.
6. Remove the four bonnet screws (61/1)
7. Remove the bonnet cover carefully (2/1)
8. Place bonnet cover (2/1) on a clean and flat surface and securely support the cover (2/1) to prevent any
hazards.
9. Unscrew the four position indicator screws (42/1/33)
10. Remove position indicator (42)
11. Unscrew the four centering ring screws (42/7)
12. Remove centering ring (42/4)
13. Unscrew the two tappet screws (42/6)
14. Remove tappet (42/5)
15. ATTENTION: Heavy gate mechanism (21)! In advance of the following steps make sure, that the gate
mechanism is securely supported to prevent any hazard due to the heavy weight of the gate mechanism. Use
the attachments points indicated in the drawing on page15 to mount eye bolts for lifting.
16. Unscrew the gate mechanism fastening screw (61/10)
17. Remove gate mechanism (21)
18. Place gate mechanism (21) on a clean and flat surface and securely support the gate mechanism (21) to
prevent any hazards
19. Clean gate seal (21/32) and counter gate seal (21/32) with alcohol or replace the seals if necessary
20. Clean seat and counter seat surface of the valve housing (1) with alcohol
21. Clean bonnet seal (2/2) with alcohol or replace bonnet seal if necessary
22. Clean bonnet seal surface at the valve housing (1/1) with alcohol
23. ATTENTION: Heavy gate mechanism (21)! In advance of the following steps make sure, that the gate
mechanism is securely supported to prevent any hazard due to the heavy weight of the gate mechanism. Use
the attachments points indicated in the drawing on page 15 to mount eye bolts for lifting.
24. Install gate mechanism (21)
25. Fasten the gate mechanism (21) with the mechanism fastening screw (61/10) (Torque 128 Nm / 94.4 lbf.ft)
26. ATTENTION: Installed eye bolts on the gate mechanism can seriously damage the valve! Remove eye bolts of
the gate mechanism in advance of the following steps.
27. Install the tappet (42/5) with the two tapped screws (42/6)
28. Install the centering ring (42/4) with the four centering screws (42/7)
29. Install the position indicator (42) with the four position indicator screws (42/1/33)
30. ATTENTION: Heavy bonnet cover (2/1)! In advance of the following steps make sure, that the bonnet cover is
securely supported to prevent any hazard due to the heavy weight of the bonnet cover. Use the attachments
points indicated in the drawing on page 15 to mount eye bolts for lifting.
31. Install bonnet cover (2/1) and fasten the four bonnet screws (61/1)

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 13/17
5.2.2 Replacement of locking balls
(Numbers in brackets refer to the picture on page 15 and 16)
1. Vent the camber on each side of the valve to atmosphere
2. Move the gate of the valve to the open position by applying compressed air to the open port
3. Disconnect complete air supply to the valve
4. Disconnect electrical main supply to the valve
5. ATTENTION: Heavy bonnet cover (2/1)! In advance of the following steps make sure, that the bonnet cover
is securely supported to prevent any hazard due to the heavy weight of the bonnet cover. Use the
attachments points indicated in the drawing on page 15 to mount eye bolts for lifting.
6. Remove the four bonnet screws (61/1)
7. Remove the bonnet cover (2/1)
8. Place bonnet cover (2/1) on a clean and flat surface and securely support the cover (2) to prevent any
hazards.
9. Unscrew the four position indicator screws (42/1/33)
10. Remove position indicator (42)
11. Unscrew the four centering ring screws (42/7)
12. Remove centering ring (42/4)
13. Unscrew the two tappet screws (42/6)
14. Remove tappet (42/5)
15. ATTENTION: Heavy gate mechanism (21)! In advance of the following steps make sure, that the gate
mechanism is securely supported to prevent any hazard due to the heavy weight of the gate mechanism.
Use the attachments points indicated in the drawing on page15 to mount eye bolts for lifting.
16. Unscrew the gate mechanism fastening screw (61/10)
17. Remove gate mechanism (21)
18. Place gate mechanism (21) with the gate downwards on a clean and flat surface and securely support the
gate mechanism (21) to prevent any hazards
19. Gradually unscrew the four nuts in crosswise direction (21/27) of the gate mechanism (21)
20. Remove the four bushings (21/13)
21. Remove the four springs (21/15)
22. Remove the four bushings (21/12)
23. Place counter plate (21/2) with the counter place o-ring (21/32) downwards on a clean surface.
24. Place gate mechanism frame (21/3) which includes the ball guidance (21/4) and qty 14 balls (21/30) on a
clean flat surface
25. Remove balls (21/30) from the ball guidance (21/4) and the gate (21/1)
26. Clean ball tracks of gate (21/1) and counter gate (21/2)
27. VAT recommends to replace gate (21/1) or counter gate (21/2) if wear at the ball track is visible
28. Clean the qty 28 ball bushings (21/5)
29. VAT recommends to replace ball guidance (21/4) if wear at the ball bushings (21/5) is detectable
30. Place qty 14 lubricated locking balls (21/30) into ball tracks of the gate (21/1)
31. Place the gate mechanism frame (21/3) which includes the ball guidance (21/4) on the gate (21/1) so that
the guide pins (21/9) and the guide holes of the frame (21/3) match.
32. Place qty 14 lubricated locking balls (21/30) into the ball bushings (21/5) of the guidance piece (21/4)
33. Install counter gate (21/2) with the four bushings (21/12), the four springs (21/15) and the four bushings
(21/13)
34. Fasten the four nuts (21/27) of the gate mechanism in crosswise direction (Torque 18 Nm / 13.3 lbf.ft)
35. Clean gate seal (21/32) and counter gate seal (21/32) with alcohol or replace the seals if necessary
36. Clean seat and counter seat surface of the valve housing (1/1) with alcohol
37. Clean bonnet seal (2/2) with alcohol or replace bonnet seal if necessary
38. Clean bonnet seal surface at the valve housing (1/1) with alcohol
39. ATTENTION: Heavy gate mechanism (21)! In advance of the following steps make sure, that the gate
mechanism is securely supported to prevent any hazard due to the heavy weight of the gate mechanism.
Use the attachments points indicated in the drawing on page15 to mount eye bolts for lifting.

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 14/17
40. Install gate mechanism (21)
41. Fasten the gate mechanism (21) with the mechanism fastening screw (61/10) (Torque 128 Nm / 94.4 lbf.ft)
42. ATTENTION: Installed eye bolts on the gate mechanism can seriously damage the valve! Remove eye
bolts of the gate mechanism in advance of the following steps.
43. Install the tapped (42/5) with the two tapped screws (42/6)
44. Install the centering ring (42/4) with the four centering screws (42/7)
45. Install the position indicator (42) with the four position indicator screws (42/1/33)
46. ATTENTION: Heavy bonnet cover (2/1)! In advance of the following steps make sure, that the bonnet cover
is securely supported to prevent any hazard due to the heavy weight of the bonnet cover. Use the
attachments points indicated in the drawing on page 15 to mount eye bolts for lifting.
47. Install bonnet cover (2/1) and fasten the four bonnet screws (61/1)

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 15/17
6 Drawing

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 16/17
6.1 Mechanism Assembly Drawing

Installation, Operating & Maintenance Instructions
Series 168, DN 400-500 (I.D. 16-20")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 240763EL
18.05.2009 17/17
7 Spare parts
Item Description DN 400 DN500 QTY required per valve
2/2 Bonnet seal N-5100-386 N-5100-390 1
21/32 Gate seal or counter gate seal N-5100-461 N-5100-469 1
26 Actuator module 239607 239605 1
19 Rotary feed through module 323482 263036 1
21/30 QTY 28 Lubricated Locking balls 245973 245974 1
(Items refer to the numbers on page 15 and 16 )
8 Warranty
Each product sold by VAT Vakuumventile AG (VAT) is warranted to be free from the manufacturing defects that adversely
affect the normal functioning thereof during the warranty period stated in VAT's «Terms of Sale» immediately following
delivery thereof by VAT, provided that the same is properly operated under conditions of normal use and that regular,
periodic maintenance and service is performed or replacements made, in accordance with the instructions provided by
VAT. The foregoing warranty shall not apply to any product or component that has been repaired or altered by anyone
other than an authorized VAT representative or that has been subject to improper installation or abuse, misuse,
negligence or accident. VAT shall not be liable for any damage, loss, or expense, whether consequential, special,
incidental, direct or otherwise, caused by, arising out of or connected with the manufacture, delivery (including any delay
in or failure to deliver), packaging, storage or use of any product sold or delivered by VAT shall fail to conform to the
foregoing warranty or to the description thereof contained herein, the purchaser thereof, as its exclusive remedy, shall
upon prompt notice to VAT of any such defect or failure and upon the return of the product, part or component in question
to VAT at its factory, with transportation charges prepaid, and upon VAT's inspection confirming the existence of any
defect inconsistent with said warranty or any such failure, be entitled to have such defect or failure cured at VAT's factory
and at no charge therefor, by replacement or repair of said product, as VAT may elect. VAT MAKES NO WARRANTY OR
REPRESENTATION OF ANY KIND, EXPRESS OR IMPLIED, (INCLUDING NO WARRANTY OR MERCHANTABILITY),
EXCEPT FOR THE FOREGOING WARRANTY AND THE WARRANTY THAT EACH PRODUCT SHALL CONFORM TO
THE DESCRIPTION THEREOF CONTAINED HEREIN, and no warranty shall be implied by law.
Furthermore, the «Terms of sale» at the back of the price list are applicable.