Features; Application; Pump Selection - PYD Electrobombas CX Série Manuel D'instructions

1. Features:

CX series horizontal stainless steel single-stage
centrifugal pump: axial inlet and radial outlet.
Motor drawn out from pump design is easy to di-
sassemble the motor and impeller without disas-
sembling the pump casing and pipe line.
∞ Max operation pressure is 1.0MPa(10bar).
∞ Wet end is all made of SUS304 material.SUS316
material is on request.
∞ Standard mechanical seal is Carbon / Ceramic
/NBR, other mechanical seal is on request. Me-
chanical seal is not suitable for liquid with solid
particles.
∞ CX pump attached with long shaft electric mo-
tor. It is totally enclosed, fan-cooled motor.
∞ CX pump adopt advanced manufacture technic
as stainless steel by cold pressing, hydroforming,
welding and etc. It is the innovated new structure
centrifugal pump. It can replace the traditional IS
pumps and general corrosion-resistance pumps.
It has the following features:
∞ Adopt new manufacture technic as hydrofor-
ming, with compact construction.
∞ A volute fluid-flow design to achieve more effi-
ciency.
∞ Wet end (pump body, pump cover, impeller ) is
made of SUS304 material.
∞ Square motor design, optimization appearance.
∞ Portable structure, suitable for slightly corrosive
liquid, and durable.
∞ Mechanical shaft seal, security and not easy to
leak.
∞ Connection type: Standard DIN flange connec-
tion.

2. Application:

CX pump is a kind of multifunctional product
with a wide range of application. It could be
used to convey various medium including wa-
ter, industrial liquid with different flow rate and
pressure.
∞ Water supply: water transport in waterworks,
boosting of main pipeline.
∞ Industrial boosting: process water system,
cleaning system, wine-brewing and food sys-
tem.
∞ Industrial liquid transfer: boiler feed, cooling
and airconditioning system, condensate sys-
tem, weak acids and weak alkali.
∞ Water treatment: water transfer, swimming
pool system.
∞ Farmland irrigation, medical and health, pe-
trochemical, aquafarming, etc.

3. Pump selection:

1) Pump specification:
Pump selection should be based on:
∞ Required flow and pressure at the permissible
working range.
∞ Pressure loss as a result of height differences.
∞ Loss in connection should consider the loss
of long pipes, bends or valves, etc.
∞ Best efficiency point should at the estimated
duty point.
2) Pump efficiency:
If the pump expected to operate at the same
duty point, then select a pump which is opera-
ting at a duty point with the best efficiency of
the pump.
If want to control the operation and the con-
sumption, then select a pump that the best effi-
ciency point should fall to the rated range that
could meet the maximum power consumption.
3)Pump material:
Material selection should be based on the liquid
(SUS304 OR SUS316).
4) Mimimum inlet pressure-NPSH
Calculation of the inlet pressure "H" is recom-
mended when:
∞ The liquid temperature is high.
∞ The flow is significantly higher than the rated
flow.
∞ Water is drawn from depths.
∞ Water is drawn through long pipes.
Inlet conditions are poor. o avoid cavitation,
make sure that there is a minimum pressure on
the suction side of the pump.
The maximum suction lift "H" in metres head
can be calculated as follows:
H=Pb*10.2-NPSH-Hf-Hv-Hs
Pb=Barometric pressure in bar. (Barometric pres-
sure can be set to 1 bar). in closed systems,Pb
indicates the system pressure in bar.
NPSH=Net positive suction Head in metres
head. (To be read from the NPSH curve at
the highest flow the pump will be deivering).
Hf=Friction loss in suction pipe(unit:m).(At the
highest flow the pump will be delivering.)
Hv=Vapour pressure (unit:m).
Hs=safty margin=minimum 0.5 metres head.
If the"H" calculted is positive,the pump can ope-
rate at a suction lift of maximum "H" metres head.
If the "H" calculted is negative, an inlet pressure
of minimum "H" metres head is required.
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