VAT 10.8 Series Assembly instructions

Installation, Operating & Maintenance Instructions
Series 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 1/14
UHV gate valve
with pneumatic actuator
This manual is valid for the valve ordering number(s):
10836-.E14/24/34/44
10840-.E14/24/34/44
10844-.E14/24/34/44
10846-.E14/24/34/44
The fabrication number is indicated on each product as per the label
below (or similar):
made in Switzerland
Fabrication No.:
patented
. .
10
...
–
.. . .
–
... ./ ....
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 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 2/14
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 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 3/14
Contents:
1Use of product .......................................................................................................................................................... 4
1.1 Technical data.................................................................................................................................................... 4
2Installation................................................................................................................................................................. 4
2.1 Installation into the system................................................................................................................................. 4
2.2 Connections....................................................................................................................................................... 5
2.2.1 Compressed air connection..................................................................................................................... 5
2.2.2 Electrical connection................................................................................................................................ 5
3Operation.................................................................................................................................................................. 6
3.1 Normal operation................................................................................................................................................ 6
3.2 Operation under increased temperature............................................................................................................ 6
3.3 Behavior in case of compressed air pressure drop............................................................................................ 6
3.4 Behavior in case of power failure....................................................................................................................... 6
3.5 Behavior in case of other failures....................................................................................................................... 6
4Trouble shooting....................................................................................................................................................... 7
5Maintenance & repairs.............................................................................................................................................. 8
5.1 Replacement of actuator / mechanism assembly .............................................................................................. 9
5.2 Replacement of gate........................................................................................................................................ 10
6Drawing................................................................................................................................................................... 11
7Spare parts ............................................................................................................................................................. 12
8Warranty................................................................................................................................................................. 14

Installation, Operating & Maintenance Instructions
Series 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 4/14
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 1 x 10-10 mbar to 1.6 bar (abs)
Differential pressure on the gate ≤1.6 bar in either direction
Differential pressure at opening ≤30 mbar
Admissible temperature: Valve ≤250°C open, 200°C closed
Pneumatic actuator ≤200°C
Position indicator ≤80°C
Solenoid ≤50°C
Position indicator: contact rating 5 A / 250 V AC, 3 A / 50 V DC
Solenoid see tag on solenoid
2 Installation
2.1 Installation into the system
Admissible forces
Forces from evacuating the system, from the weight of other components, and from baking 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
63 2½ 2000 448 80 59
100 4 2500 560 100 74
160 6 3000 672 150 110
200 8 3000 672 150 110
If a combination of both forces («FA» and «M») occurs, the values mentioned
above are invalid. Please contact VAT for more information.
FAM

Installation, Operating & Maintenance Instructions
Series 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 5/14
2.2 Connections
2.2.1 Compressed air connection
Connect compressed air only if
- valve has been installed into the vacuum system
- moving parts cannot be touched
With solenoid: Connect compressed air to IN (internal thread R 1/8“, 1/8“ NPT for USA)
Without solenoid: Connect compressed air to OPEN and CLOSE (internal thread 1/8")
Solenoid delivered separately:
Compressed air connection on pneumatics
cylinder:
Internal thread 1/8"
Remove 2 vent plugs from «A» and «B»
Compressed air to connection <A>:
Valve opens
Compressed air to connection <B>:
Valve closes
Compressed air pressure (min. - max. overpressure): 4 - 7 bar / 55 - 100 psig
Use only clean, dry or slightly oiled air!
2.2.2 Electrical connection
Do not touch electrical parts under voltage!
Connect electrical power only if
- valve has been installed into 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 Solenoid for impulse actuation (option)
MV
2
1
power 2
1
2
1
close
open
1
2
power
2
1
1
2
MV
MV
MV = coil of solenoid MV = coil of solenoid
Minimum pulse duration 50 ms
Continuous voltage does not damage the coil

Installation, Operating & Maintenance Instructions
Series 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 6/14
Standard position indicator Double position indicator (option)
12
3
4
56
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)
AB
C
D
E
G
HJK
L
M
F
L (11)
Lo
Lo
Lg
Lg
Lo = position indicator «open»
Lg = position indicator «closed» Lo = position indicator «open» Lg = position indicator «closed»
Position indicator 250° C (option)
3
1
2
4
6
5
Lo
Lg
Lo = position indicator «open»
Lg = position indicator «closed»
3 Operation
3.1 Normal operation
Valve is opened and closed by means of compressed air.
3.2 Operation under increased temperature
See «1.1 Technical data»
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 closes
Solenoid for impulse actuation (option): valve position does not change, but a started movement will be completed
3.5 Behavior in case of other failures
Standard solenoid: valve closes
Solenoid for impulse actuation (option): valve position does not change, but a started movement will be completed

Installation, Operating & Maintenance Instructions
Series 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 7/14
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:valve opens Pull push-button: 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!
Replace gate, if damaged!
Correct air pressure?
Leak at body: Flanges leaktight?
Replace bonnet seal!
Global leak at bonnet seal after heating the valve!
Due to a possible settlement of screw and VATSEAL it could happen that after a heat up and cool down procedure the
bonnet seal becomes slight leaky. In this case please check the torque (see below) of bonnet screw (see page 11 item 61)
and tighten the screws if necessary with a torque wrench.
Remark:
Do tight screws crosswise!
Necessary torque of screws is for
DN63, DN100 and DN 160; 20 Nm /15 lbf .ft.
DN200; 40 Nm / 30 lbf .ft.
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 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 8/14
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 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 9/14
5.1 Replacement of actuator / mechanism assembly
- Vent chambers and open valve
- Disconnect compressed air and electrical power from valve
- Remove bonnet screws (61) in crosswise order
- Withdraw actuator/mechanism assembly carefully from body
- Check and clean sealing surfaces of bonnet and valve seat
- Put new bonnet seal (60) on body or bonnet (depending on mounting position). If the actuator is directed downwards,
proceed according to the following drawing:
- Reassemble in reverse direction
Note! Tighten screws in crosswise order!
Torque: DN 63 - 160 20 Nm / 15 lbf .ft
DN 200 40 Nm / 30 lbf .ft
Body
Adhesive tape
Bonnet seal
Bonnet

Installation, Operating & Maintenance Instructions
Series 10.8, DN 63 - 200 (2½" - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel [phone] Fax [phone] [e-mail] www.vatvalve.com 205841ED
2008-01-26 10/14
5.2 Replacement of gate
Remove actuator/mechanism assembly as described in the section «Replacement of
actuator/mechanism assembly»
- Put mechanism into horizontal position to prevent the locking balls falling out
- Lift up valve plate manually at «H» and insert tool (W1) between spring (21/6) and ball guidance
(21/3). Refer to figure 2.
- Remove gate (21/4) in direction of the arrow
- Insert new gate in reverse direction
- Remove tool (W1)
- Check whether gate is properly inserted. The markings ∆ and ∇ (W2) of ball guidance and gate must
face each other.