Installation, Operating & Maintenance Instructions
Series 203 + 204, DN 63 - 200 (I.D. 2½ - 8")
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
229793EE
2006-03-17
9/11
5.3 Replacement of position indicator (7)
The item numbers in brackets refer to the drawing on page 10
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Switch off electrical power
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Remove plug from position indicator (7)
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Remove screws (8)
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Remove position indicator (7)
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Fasten new position indicator (7) by the screws (8)
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Connect plug to position indicator (7)
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Switch on electrical power
5.4 Replacement of bonnet seal/feedthrough O-ring (9)
The item numbers in brackets refer to the drawing on page 10
Valve must be removed from the system!
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Dismount plate from valve according to «5.1.1 Dismount plate from
valve»
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Remove both screws (10)
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Vertically withdraw actuator with shaft
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Remove O-ring (9)
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Clean sealing surfaces on body and shaft
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Put grease layer on shaft (see picture)
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Lubricate new O-ring (9) with plenty of vacuum grease
(see «7 Spare parts») and insert it
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Insert actuator with shaft
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Insert both screws (10) and fasten them alternately step-by-step
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Mount plate to valve according to «5.1.3 Mount plate to valve»
