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7.3 INSPECTION
Check the absence of:
• Excessive abrasion of the thermoplastic parts.
• Clots and/or agglomerates due to the pumped fluid.
• Deformations and/or surface lesions of the Diaphragm.
• Deformations and/or fractures on the valve seats.
Replace parts which are broken, cracked or deformed.
Reopen all clogged ducts and eliminate any chemical agglomerates.
Clean all surfaces before reassembly, particularly the OR gaskets seats (risk of leaks or dripping).
CLEANING AND REPLACING THE Diaphragm
• Control and internal cleaning every 500.000 cycles .
• Diaphragm check every 5.000.000 cycles.
• Diaphragm replacement every 20.000.000 cycles.
8. SAFETY RISKS
WARNING! CHEMICAL RISK.
Pumps are intended for operation with different types of fluids and che-
mical solutions. Follow the specific internal instructions for decontamination during the inspection or
maintenance operations.
WARNING! ELECTRICAL RISK. The pump must always be earthed independently to other elements
connected to it. Safety requirements and explosion risk prevention are not fulfilled if the pump is not
earthed or is incorrectly earthed.
WARNING:
• The Diaphragm (in contact with the product and external) are components subject to extreme wear.
Their duration is strongly affected by the conditions of use and by chemical and physical stresses. By
tests carried out on thousands of pumps installed with head value from 0° to 18°C, the ordinary life ex-
ceeds one hundred million cycles. For safety reasons, in environments with explosion risk it is necessa-
ry to disassemble and check the Diaphragm every five million cycles and to replace them every twenty
million cycles.
• In the case of Diaphragm breaking completely, fluid may enter into the pneumatic circuit, damage it
and come out through the discharge port. Therefore it is necessary to direct the air discharge up to a
safe area (using pipes).
• In situations where the user foresees the possibility of exceeding the temperature limits indicated
in this manual, it is necessary to install a protection device on the equipment that prevents to achieve
the maximum operating temperature allowed to be exceeded. If exceeded, respect to the maximum
marking temperature is not guaranteed.
REMEMBER!
Safety risks to persons are mainly caused by improper use or accidental damage.
These risks may be caused by operators working on the open pump, or caused by the nature of the
fluids that are conveyed by this type of pump. Therefore it is extremely important to diligently carry
out all the instructions contained in this manual in order to eliminate the causes of accidents that may
Operating Instructions Diaphragm Pumps
GB
