IOM -
SELF-ACTING DIAPHRAGM VALVES
MAXOMATIC VMXBERL24C
©COMEV
AL
V
A
L
VE SYSTEMS
T
echnical Dept. Ref. IOM-SELF-ACTING DIAPHRAGM V
A
L
VES, MAXOMA
TIC VMXBXERL24C-Ed.15/05
Comeval V
alve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly u
pdated data on www
.comeval.es
1.–GENERAL INFORMATION ON THE MANUAL
- This Manual provides information on safely mounting and maintaining the product. Please contact the supplier or the
manufacturer in case of problems which cannot be solved by reference to this Manual.
- This Manual is binding for transport, storage, installation, commissioning, operation, maintenance or repair.
- Manual must be read before commissioning the valve.
- The notes and warnings must be observed and complied with.
- Handling and all other work must be carried out by specialist personnel, or all the activities must be supervised and
inspected.
- It is the owner’s responsibility to defi ne areas of responsibility and competence and to monitor the personnel.
- In addition, current regional safety requirements must be always applied and observed, also when decommisioning,
maintaining and repairing the valves.
- Any deviation from this Manual or from usual installation guidelines should be notifi ed to us for recommendation and
approval.
- The manufacturer reserves the right to make technical modifi cations at any time.
- This Manual complies with the requirements of EU Directives.
2. – NOTES ON POSSIBLE DANGERS
2.1 Signifi cance of symbols
ATTENTION!
. . . Warning of general danger
2.2 Explanatory notes on safety information
In this Manual dangers, risks and items of safety information are highlighted to attract special attention.
Information marked with the symbol above describes practices, which if fail to comply with, can result in serious injury or
danger of death for users or third parties or in material damage to the system or the environment. It is vital to comply with
these practices and to monitor compliance.
All other information not specifi cally emphasized, as well as technical data in Data Sheets and product marking, must
also be observed and complied with to the fullest extent in order to avoid faults which in turn can cause serious injury to
persons or damage to property.
3. – PRESERVATION, STORAGE AND TRANSPORT
ATTENTION!
- Use proper packing for transportation.
- Keep storage protection before installation.
- The valve surface is protected by an epoxy paint. In order to prevent damage, corrosion or rust on the surface, avoid ex-
treme temperatures (keep at 5ºC to 50ºC), avoid high environmental humidity or corrosive environment. Keep the valves
away from direct sunlight, dust, fl ames or rain. Protect rubbers also against UV light. Do not pile up excessive weight. In
case of severe bumping inspect the material for any damage and replace if necessary.
4. – DESCRIPTION
4.1 General Description / Operating principles
Self-acting Diaphragm Valves consist of a main valve and a pilot system commanding the action of the main valve
through the controlled variable, using the own energy of the fl uid. The valve operates without any input of signal or energy
from external sources, with exception of Solenoids to open/close function.
The main valve basically includes the body, the cover and the rubber diaphragm especially designed and reinforced,
that divides the inner cavity of the valve into fl uid fl owing area under the diaphragm and activation chamber above the
diaphragm. The Pilot circuit commands the closing and partial or total opening of the diaphragm by fi lling or emptying the
activation chamber with the same fl uid fl owing through the valve. The system reaches the equilibrium when the degree
of diaphragm opening is the one needed to keep the controlled variable at the preset value.
The soft sealing provided by the rubber diaphragm offers an optimum seat tightness.
Valve diagram with parts can be seen at the last page of the Manual.
- Protect against external force (impacts, vibrations, etc.)
- Product parts such as pilot circuit must not be used to take up external forces that they are not designed for:
e.g. do not use them as climbing aids, or as connecting points for lifting gear, etc.
- Allow only skilled personnel; suitable handling and lifting equipment must be used. See data sheet for
weights or consult manufacturer.
- Check correct position of nameplate and handle with care to avoid personnel cuttings.
- When the valve is operated, there is a crushing hazard between the diaphragm and the body. Ensure the
valve is not under operation in case hands are introduced inside the valve.
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