VAG Operation and Maintenance Instructions • 3
1 General
1.1 Safety
These Operation and Maintenance Instructions must
be observed and applied at all times along with the
general “VAG Installation and Operation Instructions
for Valves” (see www.vag-group.com / Category: Ins-
tallation and Operation Instructions).
When using this valve, the generally acknowledged rules of tech-
nology have to be observed (e.g. international standards, etc.) The
installation must only be carried out by qualified staff (see also
Section 7.1 General safety instructions). For further technical in-
formation such as dimensions, materials or applications, please
refer to the respective documentation (KAT-A 1912).
VAG valves are designed and manufactured to the highest stan-
dards and their safety of operation is generally ensured. However,
valves may be potentially dangerous if they are operated impro-
perly or are not installed for their intended use.
Everyone dealing with the assembly, disassembly, operation,
maintenance and repair of the valves must have read and under-
stood the complete Operating and Maintenance Instructions (and
also Accident Prevention Regulations and ANSI Z535).
Before removing any protective devices and/or performing any
work on the valves, depressurise the pipeline section and ensure
it is free of hazards. Unauthorised, unintentional and unexpected
actuation as well as any hazardous movements caused by stored
energy (pressurised air, water under pressure) must be prevented.
In case of equipment that must be monitored and inspected, all
relevant laws and regulations, such as the Industrial Code, the
Accident Prevention Regulations, the Ordinance of Steam Boilers
and instructional pamphlets issued by the Pressure Vessels Study
Group must be complied with. In addition, the local accident pre-
vention regulations must be observed.
1.2 Proper use
The VAG DUOJET
®
Automatic Air Valve is a valve for flanging to
the pipeline.
The standard type is suitable for the automatic aeration and ven-
ting of water supply systems.
For the respective technical application ranges (e.g. operating
pressure, medium, temperature) please refer to the product-rela-
ted documentation (KAT 1912-A).
For any alternative operating conditions and applications, the
manufacturer’s written approval must be obtained!
These Operation and Maintenance Instructions contain important
information on the safe and reliable operation of the VAG DUO-
JET
®
Automatic Air Valve.
Observing these Operation and Maintenance Instructions helps
you to:
• Prevent hazards
• Reduce repair costs and down-time of the valve and/or the en-
tire equipment
• Improve the operational safety and useful life of the equipment.
1.3 Identification
According to DIN EN 19 all valves bear an identification label spe-
cifying the nominal diameter (DN), nominal pressure (PN), body
material and the manufacturer’s logo.
A rating plate is attached to the body and contains at least the
following information:
VAG
Manufacturer’s name
Valve type
DN
Nominal diameter of the valve
PN
Nominal pressure of the valve
Body material EN-JS 1030 (GGG-40)
Date of manufacture
2 Transport and Storage
2.1 Transport
For transportation to its installation site, the valve must
be packed in stable packaging material suitable for the
size of the valve. It must be ensured that the valve is pro-
tected against atmospheric influences and external da-
mage. When the valve is shipped under specific climatic
conditions (e.g. overseas transport), it must be specially
protected and wrapped in plastic film and a desiccant
must be added.
The factory-applied corrosion protection and any assemblies
must be protected against damage by external influences during
transport and storage.
The VAG DUOJET
®
Automatic Air Valve must be transported and
stored in a secure transport position. It is recommended to affix
retaining bolts to the flange base for transport, if required.
Picture 1: Transport position (top view)
2.2 Storage
The elastomeric parts (seals) must be protected against direct
sunlight and/or UV light as otherwise their long-term sealing
function cannot be guaranteed. Store the valve in a dry and well-
aerated place and avoid direct heat. Protect any assembly com-
ponents necessary for the satisfactory function of the valve such
as the ball and the small orifice for air release during operation
against dust and other dirt by adequate covering.
