Vertical Multi-Stage Centrifugal Pumps BL

Vertical Multi-Stage Centrifugal Pumps BL

Model:BL

The following is about Vertical Multi-Stage Centrifugal Pumps BL related BL, I hope to help you better understand Vertical Multi-Stage Centrifugal Pumps BL.

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High-efficiency standard motor, Japan NSK bearings and cold-rolled 50ww800 silicon steel sheet made the pump high efficiency, low noise and maintenance-free. Totally enclosed shaft seal, IP55 protection grade, F class insulation grade, the special "double-lock" drive end bearing made the pump withstand higher inlet pressure.
Balanced & container-type shaft seal with all the parts assembled together, no axial rotating to prevent the shaft and rubber parts from wearing, with the characteristics of rapid changing, easy installation and safe operation.Dynamic sealing is made of cemented carbide materials and the static sealing is fluorine rubber material which make the mechanical seal to be high temperature resistance, long service life, easy changing and other significant characteristics.
Being produced by the most advanced international laser welding technology,, no eliminate welding, ensure the high intensity and efficiency. The processing technology: precision casting, CNC lathe, CNC machining center, the modern advanced technology such as the laser welding technique and processing equipment.2T-4T is spot welding,16T and above is laser welding.
The built-in floating sealing ring of the pump cavity body could minimize the internal leakage produced by the differential pressure and prevent the energy consumption when liquid leaking back to the pump cavity body.
The pump core parts are designed to be multilevel interlocking, fastening nut locked, component system interlock assembly industry, to minimize the gap between the impeller per level, improve the efficiency of the impeller water conservancy, and ensure the stability, reliablity and efficiency of the pump core components.
Cold extrusion spline shaft with good surface quality, high machining accuracy, at the same time improve the comprehensive mechanical properties of the shaft and the reliability of the pump.
Model Instruction

Overview Of The Product

BL(T) series stainless steel multi-stage centrifugal pump (afterwards called pump)boasts characters of high efficiency, low noise, steady operation, etc.The pump set adopts the non-self-priming vertical multi-stage structure, which makes a compact whole,its installation easy, its operation and maintenance convenient.

Application Limits
Medium temperature: normal type:0℃ ~68℃ hot water type:0℃ ~120℃,

Ambient temperature:+40℃ ,

Max ambient pressure:1.0MPa,

Advisable to use motor of higher power in case that the density or viscosity of medium is above that of water.

PH: 5 to 8
Applications Fields

Water supply

BL

BLT

Filtration and transfer at waterworks

Distribution from waterworks

Pressureboosting in mains

Pressure boosting in high-rise buildins,hotels,etc.

Pressure boosting for industrial water supply

Industry



Pressure boosting



Process water systems

Washing and cleaning systems

Vehicle washing tunnels

Fire fighting systems

Liquid transfer



Cooling and air-conditioning systems(refrigerants)

Boiler feed and condensate systems

Machine tools(cooling lubricants)

Aquafarming

Transfer



Oil and alcohol

Glycol and coolants

Water treatment



Ultra-filtration systems

Reverse osmosis systems

Softening, ionising, demineralizing systems

Distillation sys tems

Separators

Swimming baths

lrrigation



Field irrigation(flooding)

Sprinkler irrigation

Drip-feed irrigation

Certificate

Electric Motor
Full-enclosed and ventilating two-pole standard motor

Protection clsas: IP55

Insulation class: F

Standard voltage Single phase 220V-50Hz Three phase:380/400V-50Hz

Energy Efficiency Standard (IEC60034)

Calculation Of minimum Inlet Pressure

If the pressure in pump is lower than the vapour pressure of medium, cavitation will occur, which will affect the performance of pump. To avoid the cavitation and ensure the pump inlet has a minimum pressure, maximum suction head should be calculated as following:

H=Pbx10.2-NPSH-Hf-hv-Hs

Pb: Atmospheric pressure, bar (In close pipeline system, it can be considered as the system pressure );
NPSH: Net positive suction head, m (Value at maximum flow of Q-NPSH curve);
Hf: Suction pipe line loss (Value at maximum flow of corresponding pipeline);
Hv: Medium vapour pressure, m (Medium vapour pressure at corresponding temperature, the default medium is water, as shown in figure4 on the right );
Hs: Safety margin, m, general value is 0.5.
Calculation result: if H is positive, the pump is installed in suction way, otherwise, it is installed in downdraft way.

Note: It is not necessary to do above calculation under general conditions. Only when we use pump in the following situations do we need to calculate the H:
1. Medium temperature is high;
2.The velocity of flow is larger than rated value;
3.Suction head is big or inlet pipeline is long;
4.System pressure is small;
5.Inlet condition is bad.


Selection Of Pumps

Selection of pumps should be based on:
Duty point of the pump.
Dimensional data such as pressure loss as aresult of height differences,friction loss in the pipework,
Pump efficiency etc.
Pump materials
Pump connections
Commonly used mechanical seal configuration tables

1. Duty point of the pump:

From a duty point it is possible to select a pump on the basis of the curve charts shown in "performance curves/technical" data.

2. Dimensional data:

When sizing a pump the following must be taken into accounting: •Required flow and pressure at the draw-off point. •Pressure loss as a result of height differences. •Friction loss in the pipework(Hf) (Refer to Fig.1) It may. •Best efficiency at the estimated duty point. •NPSH value. •For calculation of the NPSH value, see corresponding curves chart.

3. Pump efficiency:

Before determining the best efficiency point, the operation pattern of the pump needs to be identified. If the pump expected to operate as the same duty point, then select a BL pump which is operating at a duty point corresponding with the best efficiency of the pump.
As the pump is sized on the basis of the highest possible flow, it is important always to have the duty point to the right on the efficiency curve(eta) in order to keep efficiency high when the flow drops.

4. Pump material:

Selection of pump connection depend on the rated pressure and pipe work. the pump offer a wide range of ftexible connection such as:

5. Commonly used mechanical seal configuration tables

Application Field Shaft seal type Shaft seal material  
Normal Special 1 2 3
4
5
Type key
Rotating part Code Stationary part Code Elastomers Code Compression spring Collor Code
0℃ to +90℃ clean water   Graphite A SiC S FPM F SUS304 C ASFC
0℃ to +90℃ clean water   WC W Graphite A FPM F SUS304 C WAFC
+90℃ to +120℃ corrosion resistance   SiC S SiC S EPDM E SUS304 C SSEC
up to 0℃   WC W WC W EPDM E SUS304 C WWEC
Mechanical seal type Pump model d1 d2 h
NJK BL(T)2/4 12 12 55
BL(T)8/12/16/20 16 16 57.5
BL(T)32/45/60/90 22 22 72
NDA BW(J)2/4 12.7 16 32
BW(J)8/16 17.4 20 33.5


Maximum Work Pressure

Model

Curve No.

BL(T)2,4

2

BL(T)8,12,16,20

3

BL(T)32-2-2~BL(T)32-7

1

BL(T)32-8-2~BL(T)32-12

4

BL(T)32-13~BL(T)32-15-2

5

BL(T)45-2-2~BL(T)45-6

1

BL(T)45-7-2~BL(T)45-9

4

BL(T)45-10-2~BL(T)45-13-2

5

BL(T)64-2-2~BL(T)64-5-2

1

BL(T)64-5-1~BL(T)64-8

4

BL(T)90-2-2~BL(T)90-4-2

1

BL(T)90-4~BL(T)90-6

4

BL(T)120,150

6


The limits of pressure and temperature are shown in the following fig.4,the pressure and temperature must be in the shown in the fig. 4.

Maximum Ambient Temperature

When the pump is operating in the place where ambient temperature is higher than 40℃ or altitude is higher than 1000m,the output power of motor P2 will decrease because of poor cooling caused by low air density.Therefore, in that case,the pump should be equipped with high-power motor.

Performance Range
Product Range

Performance Curve - BL(T)2

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)4

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)8

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)12

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)16

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)20

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)32

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)45

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)64

It is recommended to be used within lift range.

Performance Table

PN25-40/DN100 standard flange, on request.

Performance Curve - BL(T)90

It is recommended to be used within lift range.

Performance Table

PN25-40/DN100 standard flange, on request.

Performance Curve - BL(T)120

It is recommended to be used within lift range.

Performance Table

Performance Curve - BL(T)150

It is recommended to be used within lift range.

Performance Table

Components & Materials

Packing Sizes & Weight

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