©COMEV
AL
V
AL
VE SYSTEMS
Technical Dept. Ref. IOM - PIST
ON (LIFT
DISC) CHECK V
AL
VES, UNIFLOW® 3P-35 - Ed.18/02
Comeval V
alve Systems reserves the right to alter any technical data contained in this Manual without prior notice. Regularly updated data on www
.comeval.es
IOM - PISTON (LIFT DISC) CHECK VALVES, UNIFLOW® 3P-35
Page 2
1. GENERAL INFORMATION ON THE MANUAL
- This Manual provides information on safely using the product, being binding for preservation, storage, handling, transport,
installation, commissioning, operation, maintenance, repair and disposal, and must be thoroughly observed at any step.
- Please contact the supplier or the manufacturer in case of issues which cannot be solved by reference to this Manual.
- Any deviation from this Manual and sound engineering practice or modification on the product shall be notified to manu
-
facturer for advice or approval.
- In addition, regional safety requirements must be always applied and observed at any step.
- All the work related to the product must be carried out, supervised and inspected by specialist personnel. It is the owner’s
responsibility to define areas of responsibility and competence and to ensure the proper monitoring.
- This Manual is in accordance with Directive 2014/68/EU on Pressure Equipment (PED).
-
In case of compliance with ATEX Directive 2014/34/EU, please observe also additional ATEX specific Instructions.
- The manufacturer reserves the right to make technical modifications at any time.
2. NOTES ON POSSIBLE DANGERS
2.1 Significance 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.
The rest of information not specifically emphasized in this Manual, along with Data Sheet and product marking, must also
be observed and complied with for safely using the product.
3. PRESERVATION, STORAGE, HANDLING AND TRANSPORT
ATTENTION!
- Protect against external force (impacts, vibrations, etc.).
- Allow only skilled personnel; suitable handling and lifting equipment must be used.
- Always use suitable protection equipment, and minimize the use of human body force at any step to avoid inju-
ries. See Data Sheet for weights or consult manufacturer.
- There is a risk of body member (hand, finger, arm…) crushed against any other solid element (wall, pipe, floor,
etc.) during handling. Take this into account and handle with care.
- There is a crushing hazard between the disc and the seat area. Ensure the disc is in rest position in case a hand
is introduced inside the valve.
- Check correct position of nameplate and handle with care to avoid personnel cuttings.
- Use proper packing for transportation.
- Keep storage protection before installation.
- In order to prevent damage, corrosion or rust on the surface, avoid extreme temperatures (keep at 5ºC to 50ºC), avoid
high environmental humidity or corrosive environment. Keep the valves away from direct sunlight, dust, flames or rain. 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
Piston Check Valves, also known as Lift Disc Check Valves, are devices for preventing the reverse of flow in a piping sys
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tem, by means of its guided disc that can be spring loaded.
Valve diagram with parts can be seen at the last page of the Manual.
4.2 Area of Application
They are used for fluids like water, oil, petroleum products, natural gas, air and other liquids and gases compatible with
materials of construction.
4.3 Technical data – remarks
Check valve selection, material compatibility, pressure and temperature limits and other essential parameters. Ensure pro
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per safety devices/measures are implemented to prevent exceeding intended use of the product. Contact the manufacturer
for advice in case of pressure tests exceeding the intended use. Refer to Data Sheet for data such as main features, duties/
limits of use, dimensions, weights, etc. and consult the manufacturer for further information.
