5
40
1.5
35
50
2
50
65
2.5
70
80
3
50
100
4
60
125
5
65
150
6
70
200
8
95
250
10
100
300
12
115
350
14
140
400
16
170
450
18
190
500
20
220
600
24
280
700
28
275
750
30
-
800
32
386
900
36
453
NEOTECHA
NEOSEAL BUTTERFLY VALVE
INSTALLATION AND MAINTENANCE INSTRUCTIONS
RECOMMENDED TIGHTENING
TORQUES (Nm) OF BOLTED
CONNECTIONS FOR INSTALLING
BUTTERRFLY VALVES
DN
Torque
mm
inches
Nm
6.5 Final checks
Inspection of the valve position as far as
the fully open position.
Cleaning and flushing the pipeline before
the first closure.
Repeated opening and closing of the valve
to ensure unrestricted movement of the
valve disc.
7 NOTES ON DANGERS DURING
INSTALLATION, OPERATION AND
MAINTENANCE
Safe operation of the valve is only guaranteed
if it has been correctly installed, commissioned
and maintained by qualified personnel
(see ‘Qualified Personnel’), taking into account
the warning information of these installation
and maintenance instructions. In addition,
compliance with the general installation and
safety regulations for the pipeline or plant
construction, together with the correct use
of tools and protective equipment, must
be ensured.
The installation and maintenance instructions
must be strictly followed when any work is
carried out on the valve or when handling the
valve. Non-observance can result in injuries or
damage to property. When the valve is used as a
final termination, a safety measure e.g. a blank
or dummy flange is recommended when carrying
out maintenance work. If the valve is operated
as an end of line valve, the information given in
DIN EN 294 point 5 must be observed.
9 OPERATION (HAND LEVER)
Model variants
Nominal diameter 40-150 (1½”-6”)
Hand lever with notched plate with
10° divisions, range 90°
Operating element: detent lever
The hand lever and graduated lever must
not be modified.
The locking function will otherwise be
adversely affected.
Damaged hand levers should be exchanged.
The butterfly valve should be mounted so
that operating staff can operate the valve
without danger.
When drives or gear units are used, the
instructions of the particular manufacturer
are applicable.
8 COMMISSIONING
8.1 General commissioning
Before commissioning, the information relating
to material, pressure and temperature should
be checked against the installation diagram of
the pipeline system.
Tools for increasing the lever or handwheel
torque are not allowed.
Any debris left in the pipeline and valves
(dirt, welding beads, etc.) will inevitably
lead to leakage.
Before each commissioning of a new system or
re-commissioning of a system after repair or
modification, it must be ensured that:
- All installation and assembly work has been
completed in accordance with the regulations!
- Commissioning is only undertaken by ‘Qualified
Personnel’.
- The valve is in the correct operating position.
- New protective equipment is installed or
existing protective equipment repaired.
8.2 Mounting additional modules
Where valves are fitted with additional options
(limit switches etc.), these should be connected
according to their operating mode in line with
the installation diagram.
Detent lever
