Operating manual
AQUA S.p.A.
ENGLISH
Page 5
ENVIRONMENT AND SAFETY REQUESTS
ICONS AND SUGGESTIONS IN T HE F OLLOW ING I NSTRUCTI ONS
Metering pumps are machines composed by dangerous parts, so:
•
Improper use or tampering,
•
Safety devices removal or disconnection
,
•
Missing or infrequent maintenance
Can provide critical damage to object and personnel
In particular, the staff must be informed about danger deriving from:
Malfunction and/or damages to device or personnel.
Explosions.
Parts in tension
Rotating or moving parts
Corrosive or pressurized pumped
Hot surface
POTENTALLY EXPL OSIVE AREA USE
PDM metering pumps in STANDARD version ARE NOT adequate for potentially explosive areas!
ATTENTION: classified area version must be ordered for this kind of use! In ATEX area require ONLY machines in ATEX execution
with flameproof motor .
Such machines are suitable for Group II category 3, in 2/22 Zone purpose (no risks during normal use)
ATTENTION: In any case PDM metering pumps ARE NOT suitable for use in zone 0/20 or 1/21 !
SAFETY VALVE
ATTENTION: Diaphragm metering pumps are volumetric pumps that MUST HAVE an external safety valve installed on the
discharge pipe to protect against overpressures. Working pressure can’t in any case be above the max admittable pressure indicated on
the pump sticker, even during safety valve discharge.
SUITABIL ITY AND CHEMI CAL COMPATIBILITY CHECK
PDM pumps are suitable to LIQUID chemical dosing ONLY. All pumps are supplied in agreement to order request.
PLEASE NOTE: any different use that agreeded with AQUA during the order is not appliable and will cause warranty dissolution.
ELECTROMAGNETI C COMPATIBILITY NOT E:
If correctly installed
and directly connected to the power supply
, PDM metering pumps respect the limit indicated by electromagnetic rules (EMC
– generic rules for industrial facilities).
Pumps with inverter connection or other electrical components have to be ordered for this use. Customer have to take care about
checks and expedients to comply to those limits.
