Coax Quadax Series Operating Instructions Manual
Operating Instructions
Quadax Series Butterfly Valves
(with actuator)
Version January 2011
müller co-ax ag
Gottfried-Müller-Str. 1
74670 Forchtenberg
Germany
Tel. +49 7947 828-0
Fax +49 7947 828-11
E-Mail
Internet
info@co-ax.com
www.co-ax.com
Operating Instructions Quadax Series Butterfly Valves with Actuator
Table of contents
0 Introduction 3
1 Intended use 3
2 Safety instructions 3
2.1 General safety instructions 3
2.2 Safety instructions for the operator 3
2.3 Particular hazards 4
2.4 Labeling of the butterfly valve 5
3 Transport and storage 5
4 Installation in the pipeline 6
4.1 General 6
4.2 Working steps 6
5 Pressure test and commissioning 8
6 Normal operation and maintenance 9
7 Troubleshooting 9
8 Warnings 10
9 Further information 11
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Operating Instructions Quadax Series Butterfly Valves with Actuator
0 Introduction
These operating instructions are designed to offer the user of butterfly valves from the
QUADAX series support in terms of installation, operation and maintenance and warn of any
hazards in particular.
Non-adherence to the following caution and warning notices may lead to
hazards, which in turn may cause the warranty to become invalid.
Attention
Please contact the manufacturer for any questions. For addresses please refer to
section 9.
1 Intended use
Butterfly valves from the QUADAX series are only to be used - following the installation of a
pipeline system (between flanges or by welding) and following the connection of the actuator
to the controls - to close off or pass on media or to regulate flow within the permitted
pressure and temperature limits. These butterfly valves are not recommended for media with
more than just a low amount of solid particulates, they are especially not recommended for
wear-causing solid media.
The maximum pressure (Ps), that may not be exceeded, is specified on the type plate, as is
the temperature range (Ts) that may not be exceeded. The precise relation between
pressure and temperature can be requested from the manufacturer.
When using the valve please ensure that section 2.2 < Safety instructions for the operator> is
observed.
If there is a pressure difference larger than 0.4 bar (liquid agents at ca. 20°C) for
valves used for uninterrupted operation for controlling, please discuss the respective
Attention
application limits with the manufacture. Cavitations must be avoided.
2 Safety instructions
2.1 General safety instructions
The same safety instructions apply to valves as to the remaining piping system in which it is
installed, as well as the control system to which the actuator is connected. These instructions
only offer safety instructions that should be observed additionally
for valves.
For actuator assemblies please refer to the additional safety instructions in the instructions of
the assembly manufacturer.
2.2 Safety instructions for the operator
It is not the responsibility of the manufacturer CO-AX and, it should therefore be ensured
prior to use of the valve that:
the valve is only used as intended, as described in section 1.
No valve may be operated, whose permissible pressure/temperature range (=
"rating") is insufficient for operating conditions: The permissible range can be
Danger -
Life
threatening
requested from the manufacturer. For materials, pressures or temperatures that have
not been approved by the manufacturer during the offer phase, permissible pressures
above room temperature must be released by the manufacture.
Non-observance of these instructions can endanger life and limb and may
cause damage to the pipe system.
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Operating Instructions Quadax Series Butterfly Valves with Actuator
It must be ensured that the selected materials for the parts of the valve that come into
contact with media must be suitable for the media used. The manufacturer assumes
no liability for damages that have been caused by corrosion or aggressive media.
Caution
Non-observance of these instructions can endanger life and limb and may
cause damage to the pipe system.
An actuating unit which was subsequently mounted on the valve, which was adjusted
to the valve and in both end positions correctly adjusted. In the closed position, the
end stop must be in the seat of the valve. A stroke limitation in the actuating unit for
the closed position should either be reset or made ineffective.
The pipe system and the control system were professionally mounted. The wall
thickness of the valve body is dimensioned so that in such professionally routed
pipelines an axial pipe force F
considered. With butterfly valves for clamping even higher values for F
as per Barlow's formula (F
z
= π/4٠DN²٠PS) is
z
can be
z
permitted. Any shear forces applies to the valve may not exceed 10% of the
aforementioned forces.
(PS = maximum permissible rated pressure at room temperature),
The valve is professionally connected to these systems, especially such valves which
are connected to the pipeline by welding,
The operating time of a pneumatic/hydraulic actuator is adjusted to the system
parameters,
In this pipe system the usual flow rates (e.g. 4 m/s for liquids) in continuous operation
are not exceeded and abnormal operating conditions such as vibrations, water
hammers, temperature shocks, cavitations, wet steam with a high water content and
more than insignificant portions of solids in the medium - particularly abrasive ones are cleared with the manufacturer,
Valves which are operated at operating temperatures of >50°C or <-20°C are
protected against contact together with the pipe connections,
The valves are only operated and maintained by specialized and trained personnel.
2.3 Particular hazards
The valve shaft is sealed by a stuffing box. Before the nuts on the stuffing box gland
Danger -
Life
threatening
are loosened or unscrewed, the pressure in the pipeline has to be completely
reduced and the pipe system empty, so that no medium escapes from the stuffing
box.
Before loosening the plug (or the cover) on the body or before removing the valve
from the pipeline the pressure in the pipeline has to be completely reduced so
Danger -
Life
threatening
that no medium can escape from the line uncontrollably. It must be ensured that the
valve is opened 5°-10, so that any pressure can escape from both sides of the
valve. The actuator may – if required – be disassembled only once the valve has
been opened for for this purpose and that it remains in this opened position.
For valves used as terminal valves:
With normal operation, especially with gaseous, hot and/or hazardous media a
dummy flange or a sealing cover has to be mounted on the free connecting
Caution
socket or (only for short-term use!) the valve has to be securely locked in “CLOSED”
position.
Caution when closing such as valve: Danger of crushing!
Caution
If a valve has to be opened in a pressurized line as a terminal valve, this must be
accomplished with utmost caution so that spurting medium does not cause any
damage.
Caution when closing such as valve: Danger of crushing!
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