Operating and installation instructions
Disc check valves
®
CHECKO
-D DN125-350
Contents
1.0 General information on operating
instructions...............................................2-2
2.0 Notes on possible dangers...................... 2-2
2.1 Significance of symbols .................................... 2-2
2.2 Explanatory notes on safety information ........... 2-2
3.0 Storage and transport ............................. 2-2
4.0 Description................................................2-3
4.1 Scope of applications ........................................ 2-3
4.2 Operating principles .......................................... 2-3
4.3 Diagram............................................................. 2-4
4.4 Technical data - remarks ................................... 2-4
4.5 Marking ............................................................. 2-4
5.0 Installation................................................. 2-5
5.1 General notes on installation............................. 2-5
6.0 Putting the valve into operation..............2-6
7.0 Care and maintenance .............................2-7
Rev. 0040106001 2613 englisch page 2-1
8.0 Troubleshooting ....................................... 2-7
9.0 Troubleshooting table ............................ 2-7
10.0 Dismantling the valve or the top part .. 2-8
11.0 Warranty / Guarantee ............................. 2-8
Operating and installation instructions
®
CHECKO
-D DN 125-350
1.0 General information on operating instructions
These operating instructions provide information on mounting and maintaining the fittings.
Please contact the supplier or the manufacturer in case of problems which cannot be
solved by reference to the operating instructions.
They are binding on the transport, storage, installation, start-up, operation, maintenance
and repair.
The notes and warnings must be observed and adhered to.
- Handling and all work must be carried out by expert personnel or all activities must be
supervised and checked.
It is the owner’s responsibility to define areas of responsibility and competence and to
monitor the personnel.
- In addition, current regional safety requirements must be applied and observed when
taking the fittings out of service as well as when maintaining and repairing them.
The manufacturer reserves the right to introduce technical modifications at any time.
These Operating Instructions comply with the requirements of EU Directives.
2.0 Notes on possible dangers
2.1 Significance of symbols
ATTENTION !
. . .
Warning of general danger.
2.2 Explanatory notes on safety information
In these Operating and Installation Instructions dangers, risks and items of safety
information are highlighted to attract special attention.
Information marked with the above symbol and “ATTENTION!” describe practices, a failure
to comply with which 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 specifically emphasised such as transport, installation, operating
and maintenance instructions as well as technical data (in the operating instructions,
product documentation and on the device itself) must also be complied with to the fullest
extent in order to avoid faults which in turn can cause serious injury to persons or damage
to property.
3.0 Storage and transport
ATTENTION !
- Protect against external force (like impact, vibration, etc.).
- Suitable materials handling and lifting equipment should be used.
See catalog sheet for weights.
- At -20°C to +65°C.
Page 2-2 Rev. 0040106001 2613
Operating and installation instructions
®
CHECKO
-D DN 125-350
4.0 Description
4.1 Scope of applications
Valves are used for „preventing mediums from flowing back along pipe lines“.
ATTENTION !
- Refer to the data sheet for applications, limits on use and possibilities.
- Certain media require or preclude the use of special materials.
- The valves are designed for standard operating conditions. If conditions exceed
these requirements, e.g. aggressive or abrasive media, the operator should
state the higher requirements when ordering.
- The use in areas subject to explosion hazards is possible.
The information complies to the Pressure Equipment Directive 97/23/EC.
It is the responsibility of the machine planner to ensure compliance.
The special markings on the valve must be taken into account.
Refer to the catalogue sheet to see which materials are used in standard versions.
Please contact the supplier or the manufacturer if you have any questions.
4.2 Operating principles
The flowing medium presses against the bottom of the plug
(opening pressure: refer to the data sheet), thereby lifting it. The valve closes when the
pressure drops below the opening pressure.
This prevents the medium above the plug resp. behind the valve plate from flowing back.
ATTENTION !
When sizing the check valves please note, that a particular volume flow is
necessary to bring the valve into a stable full-opened position
(refer to data sheet).
If this full-opened position is not achieved, the valve is oversized and will result
chattering noises. This means a higher abrasion and causes a valve malfunction.
Rev. 0040106001 2613 Page 2-3
4.3 Diagram
A
A
4
1
8
9
10
A - A
Operating and installation instructions
CHECKO
Fig. 1: CHECKO®-D - Disc check valve
(1.4408)
®
-D DN 125-350
Refer to the data sheet for information about materials with designations and figure
numbers.
4.4 Technical data - remarks
for
- Principal dimensions
- Pressure-temperature-ratings
- Valves with butt weld ends, etc. refer to data sheet.
4.5 Marking
Details of the CE-marking on the valve:
CE-marking
1250 Notified body
Manufacturer
Figur Type
CS1316265 Year of manufacture (example) (stamped on the body)
Address of manufacturer:
refer to item 11.0 Warranty / Guarantee
Page 2-4 Rev. 0040106001 2613
Operating and installation instructions
®
CHECKO
-D DN 125-350
5.0 Installation
5.1 General notes on installation
The following points should be taken into account besides the general principles governing
installation work:
ATTENTION !
- Remove flange covers if present.
- The interior of valve and pipeline must be free from foreign particles.
- Note installation position with reference to flow, see mark on valve. The
pressure of the medium must press against the bottom of the plug.
- Steam line systems should be designed to prevent water accumulation.
- Lay pipelines so that damaging transverse, bending and torsional forces are
avoided.
- Protect valves from dirt during construction work.
- Connection flanges must mate exactly.
- Suitable materials handling and lifting equipment should be used.
See data sheet for weights.
- Centering between the flanges is achived on the centering collar integrated in
the body and by the flange connection screws or the loose enclosed centering
ring (see product data sheet, table „Dimensions“)
- Centre gaskets between the flanges.
- Install compensators to compensate for thermal expansion of the piping.
- Critical applications, immediately downstream of pumps, compressors, etc.,
where severe turbulence and pulsating pressure surges may occur, may affect
the valve‘s function.
- Inner parts with sharp edges may cause cut injuries to the hands. Use work
gloves when changing the valve.
- Planners / construction companies or operators are responsible for positioning and
installing products.
- The valves are designed for application, not influenced from weather.
- For application outside or in adverse environments like corrosion-promoting conditions
(sea water, chemical vapours, etc.), special constructions or protective measures are
recommended.
Rev. 0040106001 2613 Page 2-5
Operating and installation instructions
6.0 Putting the valve into operation
ATTENTION !
- Before putting the valve into operation, check material, pressure, temperature
and direction of flow.
- Regional safety instructions must be adhered to.
- Residues in piping and valves (dirt, weld beads, etc.) inevitably lead to leakage.
- Touching the valve when it is operating at high (> 50°C) or low (< 0°C) media
temperatures can cause injury.
Affix warning notice or protective insulation as appropriate!
Before putting a new plant into operation or restarting a plant after repairs or
modification, always make sure that:
- All works has been completed!
- The valve is in the correct position for its function.
- Safety devices have been attached.
- The leak-tightness of the flange gaskets of the valve has to be checked directly
during commissioning / recommissioning.
CHECKO
®
-D DN 125-350
Page 2-6 Rev. 0040106001 2613
Operating and installation instructions
®
CHECKO
-D DN 125-350
7.0 Care and maintenance
Maintanance and maintenance-intervals have to be defined by the operator according to
the requirements.
ATTENTION !
- See point 10.0 before dismantling the valve.
8.0 Troubleshooting
In the event of malfunction or faulty operating performance check that the installation and
adjustment work has been carried out and completed in accordance with these Operating
Instructions.
ATTENTION !
-
It is essential that the safety regulations are observed when identifying faults.
If malfunctions cannot be eliminate with the help of the following table
“9.0 Troubleshooting table”, the supplier or manufacturer should be consulted.
9.0 Troubleshooting table
ATTENTION !
- read point 10.0 and 11.0 prior to dismantling and repair work!
- read point 6.0 before restarting the plant !
Fault Possible cause Corrective measures
No flow Wrong flow direction Correct the installation
Little flow Dirt sieve clogged. Clean / replace sieve.
Piping system clogged. Check piping system.
Leakage across valve seat. Body (pos.1) / valve plate (pos. 8) dam-
aged by foreign particles (Fig. 1)
Medium contaminated
(suspended solids).
Rattling / banging
of the plug resp. of the
valve plate
Nominal diameter of the valve in compliance to the flow rate is t
- high flow turbulences;
- the check valve is mounted directly by
a centrifuged pump;
- behind pressure reduction stations;
- behind pipe elbows;
- in compact plants;
- expansion joints are missing;
- the pump is not mounted on a damper;
- there is no flow stabilizing pipe length;
- there is no start-up bypass line
oo big
Replaced valve, consult supplier/manufacturer.
Clean valve.
Install dirt screen upstream of valve.
Choose smaller nominal diameter
Alter the system
Rev. 0040106001 2613 Page 2-7
Operating and installation instructions
®
CHECKO
-D DN 125-350
10.0 Dismantling the valve or the top part
ATTENTION !
The following points must be observed:
- Pressureless pipe system.
- Medium must be cool.
- Plant must be drained.
- Purge piping systems and compartments in case of caustic, inflammable,
aggressive or toxic media.
11.0 Warranty / Guarantee
The extent and period of warranty cover are specified in the "Standard Terms and
Conditions of Albert Richter GmbH & Co. KG“ valid at the time of delivery or, by way of
departure, in the contract of sale itself.
We guarantee freedom of faults in compliance with state-of-the-art technology and the
confirmed application.
No warranty claims can be made for any damage caused as the result of incorrect handling
or disregard of operating and installation instructions, datasheets and relavant regulations.
This warranty also does not cover any damage which occurs during operation under
conditions deviating from those laid down by specifications or other agreements.
Justified complaints will be eliminated by repair carried out by us or by a specialist
appointed by us.
No claims will be accepted beyond the scope of this warranty. The right to replacement
delivery is excluded.
The warranty shall not cover maintenance work, installation of external parts, design
modifications or natural wear.
Any damage incurred during transport should not be reported to us but rather to the
competent cargo-handling depot, the railway company or carrier company immediately or
else claims for replacements from these companies will be invalidated.
Technology for the Future.
GERMAN QUALITY VALVES
ARI-Armaturen Albert Richter GmbH & Co. KG, D-33756 Schloß Holte-Stukenbrock
Telephone (+49 5207) 994-0 Telefax (+49 5207) 994-158 or 159
Internet: http://www.ari-armaturen.com E-mail: info.vertrieb@ari-armaturen.com
Manufacturer:
ChemValve Schmid AG
Valve technology
Duennernstraße 540
CH-4716 Welschenrohr
Page 2-8 Rev. 0040106001 2613
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