Flowserve Torex butterfly valves User Manual
1
Fi 41.42(4)GB
08.01
NAF-Torex butterfly valves
Maintenance and installation instructions
List of spare parts
Contents
SAFETY
General 1
Lifting 2
Receiving inspection 3
Installation 4
Flange gaskets 5
Starting up 6
List of materials and spare parts 7
Ordering of spare parts 8
Maintenance 9
To remove the valve from the pipework 9.1
To change an Inconel seat ring 9.2
To replace EPDM, FPM and PTFE seat rings 9.3
To replace PTFE seat rings 9.4
To adjust a new seat ring in a valve with
manual operating lever or worm gear unit 9.5
To adjust the seat ring in a valve with
pneumatic actuator 9.6
To change the upper shaft seal of O-ring type 9.7
To inspect and replace the upper shaft seal
of graphite type 9.8
To change the packing, item no. 9 9.9
To replace the shafts and valve disc 10
Fitting the actuator to the valve 11
SAFETY
- Assess all the risks to eliminate the risk of personal
injury and material damage. Read these instructions
thoroughly!
- Always use the necessary protective equipment
and comply with applicable safety directives when
working with hazardous or hot/cold medium.
- Never operate a valve without first ensuring that there
is no risk of crush injuries. The risk is highest with
automatic valves.
- Take necessary safety precautions to prevent
unintentional manoeuvre - i.e to atmosphere.
- Never dismantle a valve or part of a valve without
ensuring that the line is free of pressure and any
content.
- Always check that the valve type and material is
suitable for its intended use. This applies especially to
highly oxidising and corrosive medium. Observe also
the risk of erosion and explosion as well as decaying
medium. If in doubt, always request a written
recommendation from NAF AB.
1. General
The instructions and list of spare parts in the
succeeding apply to NAF-Torex butterfly valves in
accordance with catalogue sheet Fk 41.42GB.
The product codes of NAF-Torex valves are as follows:
238ZBB - XXXX - 05 238Z BB - XXXX - 06
238ZBB - XXXX - 07 238Z BB - XXXX - 17
238Z BB - XXXX - 55 238Z BB - XXXX - 66
238Z BB - XXXX - 85 238Z BB - XXXX - 86
238Z BB - XXXX - 88
1)
Z = Pressure class
2)
XXXX = Size
3)
05 — 88 = Sealing type
2. Lifting
All lifting must be carried out on the valve itself and not
on the actuator.
3. Receiving inspection
All valves leaving our works are inspected and tested in
accordance with the relevant requirements or in accordance with the special provisions specified by the purchaser.
Valves equipped with actuators are subjected to
functional testing and are adjusted in such a manner that
every unit is completely ready for direct installation in the
pipework.
However, in view of damage that may have occurred
during transport, it is advisable that receiving inspection
be carried out as follows
- Check that the valve delivered is correct in terms of
type, size, equipment, etc.
- Examine the valve, actuator and valve positioner
regarding possible damages.
- Operate the valve to the limits of its travel to
check the settings of the limit stops.
2
4. Installation
Before installing the valve, ensure that the pipework is
free from impurities, that the pipe ends between which
the valve is to be installed are parallel and are correctly
aligned, and that the distance between the pipe ends corresponds to the valve length, including gaskets.
The valve must not be used for drawing together or aligning incorrectly run pipes (see Fig. 2).
Wrong installation Correct installation
Fig.2.
NAF-Torex valves can be installed in any position
,
regardless of the direction of flow. However, we
recommend that, if installed in a horizontal run of pipe,
the valve should be mounted with the shafts horizontal,
in order to prevent the accumulation of dirt and other
impurities around the shaft ends.
The butterfly valve body is marked with an arrow which
indicates that best tightness thereby that the differential
pressure gives an additional torque in the closing
direction while a differential pressure towards the plane
side gives an extra torque in the opening direction.
Locate the valve so that it will be easily accessible
for inspection and service, particularly if the valve is
equipped with an actuator and a valve positioner.
Ensure that the valve is installed so that the connected
pipe ends do not obstruct the free movement of the disc
when the valve is operated.
The pipes should be supported on each side of the
butterfly valve, in order to relieve the valve of loads and
avoid vibrations.
5. Flange gasket
Gaskets to the dimensions specified in SS 359, DIN 2690
or ANSI B 16.5, 1988, Table E1, Figure E2, Class 150 can
be used.
6. Starting up
Before starting up, flush the pipework - with all valves
in the open position - so that any impurities that may
damage the sealing surfaces of the valve and impede its
operation will be flushed away.
For other information concerning starting up, see
”Instructions for valve positioners” Fi 41.82A.
Ensure that the pipe ends align and have the correct
distance
7. List of materials and spare parts
Item Qty Part Material Sealtype
1 1 Body EN 1.4408/CF8M
2 1 Disc EN 1.4408/CF8M
3 1 Gland cover EN 1.4408/CF8M
4 1 Stem, upper EN 1.4460
5 1 Stem, lower EN 1.4460
6 1 Clamp ring
DN >250 EN1.4408/CF8M
DN<=250 EN1.4436/
AISI316
7 1 Retaining EN1.4436
8* 1 Gasket Graphite
9* 1 Gasket Graphite
10* 1 Seat ring Inconel 718 05-07,17
11* 1 Seat ring EPDM 66
12* 1 Seat ring FPM 55
14* 1 Seat ring PTFE carbon reinforced 85,86,8A,8B
15*1)1 Clamp ring
DN >250 EN1.4408/CF8M
DN<=250 EN1.4436/
AISI316
16* 1 O-ring EPDM 06,66,86
17* 1 O-ring EPDM 06,66,86
18* 1 O-ring FPM 05,55,85
19* 1 O-ring FPM 05,55,85
20* 1 Backing ring PTFE
21* 1 Boxpacking Graphite 07,17
22 1 Cup spring EN1.4310 0B, 8B
23 1 Gland cover EN 1.4408/CF8M
24A 1
Boxpacking Zebra-
CL™
V-ring PTFE
0A, 8A
24B 1 Boxpacking Safeguard V-ring PTFE liveloaded 0B,8B
26 1 Stem bearing Metaloplast
27 1 Stem bearing Metaloplast
28 2 Screw A4
29 2 Nut A4
30 2 Screw A4
31
2)
Screw A4
37 1 Washer Metaloplast
1) Clamp ring item15 must be included if the valve is to be
converted from some other type of seat to a PTFE seat ring.
2) Quantity depending on dimension.
*) Recommended spare parts.
Other material combinations are available to order - consult your NAF representative.
3
26
27
37
-07, -17
Zebra-CL™ 0A, 8A
Safeguard 0B, 8B
29
29
23
23
24
25
22
28
28
20
18
20
18
Fig 3. NAF-Torex - spareparts, shaft sealing and seatring types
Seal type -85, -86 Seal type -55, -66
Seal type -05, -06, -07, -17
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