Flowserve T4E Durco Lined Plug Valve IOM - Manual (Page 12)

T4E - PFA lined Plug Valve
Ahaus GmbH
von-Braun-Straße 19a
D-48683 Ahaus
Postfach 1162 D-48661 Ahaus
Telefon: +49(0) 2561-686-100
Fax: +49(0) 2561-686-200
Register: 18
Page: 12
Date: 03.2004
Revision: 02.2007
Technical Manual
Disassembly instructions T4E
For all jobs which are to be carried out on an installed valve, the works safety requirements and
the general accident prevention instructions must be observed. Moreover, the general installation
and maintenance instructions for atomac fluorcarbon resin lined valves must be considered.
1. Prior to disassembly, the valve must be cleared of all fluid according to the
above-mentioned instructions. Particular care must be taken that during rinsing and
draining of the piping, the valve is opened and closed repeatedly. These cycles (open-
ing and closing) are to be repeated during draining of the piping. Only when following this
procedure, is it ensured that all remaining pressure inside the body is eliminated.
2. For disassemble the valve put the body on a work bench with a soft cover (rubber mat).
3. Disassemble the wrench by removing the bolt (190) and washer (180).
4. By pushing up the stop collar (130) the stop collar retainer (140) can easily be removed.
5. Unscrew the top cap bolts (100) and remove the top cap (080) from the body (010).
6. Turn the plug (020) several timer to make it move upwards.
7. Remove the grounding spring (070), thrust gland (060), metal diaphragm (050) (optional)
and the
PFA diaphragm (040).
8. If necessary the stop (110) can be removed
by unscrew the stop fasteners (120).