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Idiomas disponibles
Idiomas disponibles
Pulsation Dampener
It consists of a liquid chamber that receives
pulsating fluid, a diaphragm that increases
or decreases the volume of the liquid
chamber, an air chamber that regulates the
pressure in the liquid chamber, and valves
that regulate the pressure in the air chamber.
When the pressure in the liquid chamber rises due to the
pulsation of the pump operation, the diaphragm rises to the
air chamber to absorb the pulsating fluid pressure.
When the pressure in the liquid chamber drops, the
pressure in the air chamber causes the diaphragm to drop to
compensate for the pressure.
Air in the air chamber is exhausted when the diaphragm drops
to the lower limit by the valve connected to the diaphragm,
exhaust is stopped when the diaphragm rises, and the
pressure in the air chamber is kept within a certain range. The
diaphragm is controlled to the intermediate position to keep
the pulsation cushioning at all times.
SERVICE LIFE
Frequency of the regular service or maintenance is
determined by the application of the pump. Regularly check
the functionality of the product. In case of malfunction or
capacity reduction, always consult your local authorized
YAMADA Distributor or download the operation and
maintenance manual. Technical data can be found on the
YAMADA website at
https://www.yamada-europe.com/downloads
2. MARKING AND INDICATIONS
On the product, the following markings and tags are present:
TYPE PLATE
The type plate is attached to the product. Refer to DOC-1 in
the APPENDIX, for the location of the markings and tags.
Without the type plate, CE-ATEX/UKCA
WARNING
certification is no longer valid.
WARNING LABELS AND TAGS
Attached as a yellow plastic tag together
with the type plate to the products.
It states:
WARNING
• Read all instructions carefully before
operation.
• Conform to the product specifications.
• Use compressed air or nitrogen for
operation.
• DO NOT exceed the maximum
operating pressure.
• Wear personal protective equipment.
Company logo
Product type
Model pump type
Item number
Serial number
Manufacturing Year-Month
Maximum liquid process temperature
Ambient temperature
Maximum air operating pressure
Contact data
ATEX rating code Gas
ATEX rating code Gas and Dust
Notified body certificate number
CE/UKCA mark
Country of production
• Establish a ground connection in flammable environment or
when handling flammable liquid.
• Perform a daily inspection at the beginning of each day.
• Immediately stop operation if any defect is found.
• Liquid may spurt out of the exhaust port due to mechanical
failure. Take protective measures.
• Remove residual pressure and residual liquid before
disassembly.
• Follow safe handling precautions/SDS provided by the
manufacturer when handling the liquid being pumped.
CAUTION
• Retighten bolts before operation to avoid potential fluid
leaks. (Refer to maintenance manual.)
IN/OUT LABELS
The product typically has two fluid ports: the fluid inlet port
indicated with "IN" and the fluid discharge port indicated with
"OUT". This indication can also be marked on the product's
casting parts.
CAUTION/INSTRUCTION LABELS
(PLASTIC CASING ONLY)
For plastic casings, additional caution should be taken
during installation. The white sticker label on the body/pump
chamber of the pump states:
When connecting joint for piping or hose connector to
manifold, never fasten it too strongly. Otherwise, manifold
may be damaged.
Connect it to manifold as follows:
1) Bind sealing tape doubly on the screws of joint or
connector to be connected to manifold.
2) Screw it into manifold correctly and fasten it fully by hand.
3) Then, fasten it further for two rounds with a tool. If there
would be a leakage, fasten it little by little additionally.
MODEL NUMBER
Refer to DOC-2 in the APPENDIX.
ATEX 114 (2014/34/EU)
The product models listed in the Declaration of Conformity
may be used in some potentially explosive atmospheres.
Products must be used in an environment
which comply with the marking. Otherwise
WARNING
products can be the source of ignition.
The specific models are marked:
II 2G
Ex h .... Gb
II 2G / 2D Ex h .... Gb / Ex h .... Db
CONCEPT OF EXPLOSION PROTECTION
For this product the type of protection constructional safety
"c" is applied, as indicated by the marking Ex h. The product
can be used with flammable liquids as process medium
and can be installed in hazardous areas classified as zone
1 or zone 2 caused by the presence of flammable gas and/
or vapour (as indicated by the marking 2 G) or in hazardous
areas classified as zone 21 or zone 22 caused by the
presence of combustible dust or fibers (as indicated by the
marking 2 G / 2 D). The explosion protection is only valid if
the product is operated within the specifications and if all
applicable specific conditions of use are fulfilled.
ATEX CODING DESCRIPTION
Refer to DOC-3 in the APPENDIX.
GB
GB-3
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