WORKING PRINCIPLE
The MQ series are
self-priming centrifugal pumps suitable for suction from deep
wells.Self-priming is achieved using an ejector,housed in the
jet body,which can be installed directly on the pump body or
more often lowered in a well and connected to the pump body by
two pipes.the total delivery produced by the closed
centrifugal impeller is sent only partly to the delivery
opening .The remaining (driving)water is recirculated through
the ejector ,which is connected to the suction chamber where
it generates the necessary vacuum to draw up water from the
point where the jet body is immersed. The water from the jet
body opening mixes in the diffuser with recirculating water
from the pump,thus increasing its pressure at the expense of
the recirculating water,and is drawn into the pump through the
suction pipe.when the jet body is directly installed on the
pump body the MQ series works like the mj,mjsw series.
PUMP INSTALLATION AND
APPLICATIONS
These pumps are suitable for pumping
clean water and fluids which are not chemically aggressive to
the pump components.The mq series installed above ground with
the jet body submerged guarantees functioning even when the
static level of the well water falls as far as 50 meters below
the level of the installed pump .For this reason these pumps
are extremely reliable, economical and simple to use and find
many uses in domestic applications and the automatic
distribution of water from small and medium-sized surge tanks
,watering gardens ,etc.In all cases where the suction depth
exceeds the normal capacity (9 meters)for surface pumps.Always
install a retention valve on the jet body opening.It is
advisable to install a valve on the pump delivery opening ,to
ensure adequate counter-pressure when working. Fill the pump
body and the piping connecting the pump to the jet body with
water before starting up.When drawing water from depths not
exceeding 9 meters the jet body (4"ejector only)can be
installed directly onto the pump body.In this case,when first
starting up fill the pump body with water,without bothering to
fill the suction piping.These pumps should be installed in a
covered area, protected against the weather.
PERFORMANCE
The wide range of pumps in
the MQ series satisfies the most varied requirements with
features such as:
¡ù high heads compared to required power
levels;
¡ù high tolerance of the presence of entrained air
in the fluid to be pumped;
¡ù suction depth down to 50
meters in installations with submerged jet systems.
STRUCTURAL CHARACTERISTICS
¡ù cast iron
body
¡ù cast iron jet body
¡ù brass impeller with
centrifugal radial flow type
¡ù stainless steel shaft(Hi-Cr
plated 45# steel up to 0.75kw)
¡ù stainless steel mechanicel
seal (graphite to ceramic or graphite to SiC)
¡ù protection
IP44
¡ù with thermal overload protector in single phase
motor
¡ù NSK bearing or local bearing
WARRANTY: 1 YEAR(according to our general sales
conditions)
OPERATING DATA N=2900MIN-1 LIFT H=METRES WITH
EXTERNAL EJECTOR
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