Shaft Group

Story of 3 R‘s
Pum
pen
1
Intel
ligen
z
Various Standard for End Suction Pumps
Pum
pen
2
Intel
ligen
z
Comparison of ET & NL
Options
ET
NL
MoC Beyond Cat A & B
Yes
No
MoC Variants within Cat A & B
Yes
No
Vertical Execution
Yes
No
SemiOpen Design
Yes
No
Inspection/Witnessing
Yes
No
Quality Assurance Plan
Yes
No
Fire duties
Yes
No
Mech Seal variant
Optional
standard
Oil Lubrication
Optional
No
Shaft Groups
4 sizes
3 sizes
Temperature range
110 deg.C
3
120 deg.C
NL End Suction Back Pull Out Pumps
Horizontal
Radially split
Single stage
Single entry,
Volute casing
Radial impeller
Back pull out design
ng
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rm
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n
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3
C
7
N
E
to
EN 733 & ISO 2858
EN 733 : European standard
EN 733 needs lesser space – important for Building Service
Shaft
Group
1
2
3
4
“F” as per
EN 733
360
470
530
“F” as per
ISO 2858
385
500
530
670
f
Proven Bearing design to withstand even 1400 C
5
Designation
NL 32-200-B-0.75-4- 05- XX B
Norm pump code
Ø Discharge side (mm)
Ø max. Impeller (mm)
Hydraulic version
Motor power (Kw)
No. of poles
Construction Variant
Technical definition code
Index of technical evolution
Applications
NL
HVAC
Typical
Applications
Industry
Water supply
Fire protection
Biotech and
Pharma
Operating Parameters
Pump Delivery Size DN
Capacity
Q
Head
H
End Pressure
P
Operating temp.
T
Max. Suction Pressure
32-150mm
up to 600 m³/hr
up to 150 m
up to 16 bar
-20°C up to 120°C
10 bar
Operation Zone (Continuous operation)
Size of the
pump
0.3 Qopt < Q < 1,1 Qopt
32-125 to 80-400,
100-315 to 100-400,
125-315 to 125-400
150-250 to 150-400
0.5 Qopt < Q < 1,1 Qopt
100-160 to100-250
125-200 to 125-250, 150-200
Family Curve – 1450 rpm
Family Curve – 2900 rpm
Essential Parameters for Pump Selection
Capacity
Total Head
NPSHa
Pumped liquid temperature
Density
Drive unit speed
Maximum discharge pressure
Q = m³/hr
H = m (water column)
= m (water column)
T = °C
ρ = kg/dm³
n = rpm
P = bar
Pump Selection to be done as per the individual performance curves for
finalization taking into consideration the above factors.
The NPSH values given in individual characteristic curves are the
minimum values which correspond to cavitation limits & are valid for
water without gases. The individual curves are for nominal speed &
selection should be corrected based on effective speed of the drive unit.
__________________________________________________________
NPSHavailable must be more than NPSH required by atleast 0.5m.
Selection Guidelines - Individual curve
1> The pump curves indicate differential pressure head generated at the
given impeller diameter. For operating points following in between two
curves, the diameter should be calculated suitably.
2> The model wise limitations of the flow (Qmin & Qmax) must be taken
care while selecting the pumps. As a good engineering practice, the
selection should be closer to Qopt to have the minimum bkW.
3> The NPSH values given in pump curves are the minimum values which
correspond to cavitation limits & are valid for water without gases.
NPSHavailable must be more than NPSH required by at least 0.5m
3> Pump curves are for nominal speed & selection should be corrected
based on effective speed of the drive unit.
4> Pump curves are valid for water (Density equal to 1.0 kg/dm³). For
other liquids proper care should be taken to arrive at the power required.
Product Sizes at a glance
DN /
Impeller Dia
125
160
200
250
315
400
Shaft
Group
32
40
25
50
65
35
80
100
125
150
45
Design Features
1> Bearings :
Deep groove ball bearing packed with grease for life time of bearing
Only three shaft groups covering all sizes.
Shaft Group
25
35
45
Bearing Size.
6306 2Z C3
6308 2Z C3
6311 2Z C3
2> Flanges :
Flange drilling confirms to DIN 2533 PN16
3> Pump performance :
The values of tolerance factors for pump performance are as per ISO
9906 grade II.
4> Pressure rating
The entire range is suitable for PN16
Design Features
5> Painting :
In WILO Green as a standard. Painting as per internal Standards.
However customized painting can be offered at extra costs.
6> Construction Features
Reduced shaft deflection (compliance with ISO 5199)
Oversized bearings
Improved lubrication and cooling of seal through conical seal chamber
and vortex breaking ribs
Improved hydraulic efficiency.
6> Recommended Power Reserve :
bkW
Up to 10 kW
Above 10 kW
(%) Power Reserve.
15%
10%
Design Features
Shaft Sealing : Gland packing
Shaft sealing can be done either by gland packing or mechanical seal.
Shaft
Group
25
35
45
a
D1 d1
Dimensions in
mm
d1
D1
a
32
48
40
40
60
50
55
75
50
Packing size
mm
qty
8x8
3 nos.+ 1
lantern
10x10
ring
Design Features
Shaft Sealing : Mechanical Seal
Shaft sealing by Mechanical seal : make Burgmann Type : MG12 AQ1EGG
Dimension L1k of the standard ISO24960 in the diameter 24, 32 and 45.
Øs
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l
Material Combinations
Standard material Combinations offered :
PART
NO.
PART NAME
MATERIAL EXECUTION
06
10.2
Volute Casing
16.1
Casing Cover
21
Shaft
23
Impeller
26
08
C.I.
STAINLESS STEEL
C.I.
CI
BR
Bearing Bracket
C.I.
47.1
Mech. Seal Sleeve
STAINLESS STEEL
52.3
Shaft Seal
BR
ACRYL FIBRE
Stuffing Box
Casing Back Cover
ARAMID FIBRE WITH NBR BINDER
67.2
Casing Plug
EPDM
43.3
Mechanical Seal
Gland Packing
44
EPDM
ROUGHED
COTTON
EPDM
ROUGHED
COTTON
Accessories
Standard Accessories that can be supplied along with the pump “
1> Coupling
2> Coupling Guard 3> Baseplate with Foundation Bolt
4> Prime Mover-Electric Motor/ Diesel Engine
Couplings
The coupling between pump and prime mover can be either flexible or spacer type.
For ease of maintenance and to take advantage of back pull out feature of the
pump, spacer type coupling is recommended.
Prime Mover
Prime mover to be used is electric motor as standard. Steam turbine or an I.C.
engines can be used upon request.
Auxiliary Connections
Um1: Pressure gauge. Only available on request.
Um2: Pressure gauge. Only available on request.
UAL: Drainage for leakage.
Us: Sensor
Ue: Drainage
Pump Dimensions
Pump Dimensions
Sectional Drawing
List Of Components
10.20
16.10
18.30
21.00
23.00
32.10
33.00
43.30
46.10
52.40
Volute Casing
Casing Cover
Support Foot
Shaft
Impeller
Ball Bearing
Bearing Bkt
Mech. Seal
Stuffing Box
Shaft Sleeve
(Stuffing Box)
Pump Motor Matrix – 2900 rpm
Pump Motor Matrix – 1450 rpm
Forces & Moments
26
Noise Level
The noise levels of the pump comply with the Directive 001/30 1992 of the EUROPUMP Commission. The following table provides
approximate values:.
Notes :
Additional noise can be
generated by:
• The driver.
• A possible misalignment
of the coupling.
• Pipework
(The larger the pipe
diameter, the lower
the pipe noise.)
27
What’s new ?
28
Innovative Coupling guards
Grooves for 2 fonctions :
Cutting guide for lengh ajustment
Cover fixation for smallest motor
Cover
29
Confined Gasket for better sealing
30
Increased life of Mechanical Seal
Conical seal
chamber
Avoids vortex
formation
Anti-Rotation
rib
31
Reduces the
possibility of
pressure drop in
Mech seal area
Features
Flanges machined to DIN Std
Less complex design
requires fewer parts,
resulting in faster
delivery and
easier maintenance
Confined gasket enclosed between
cover and casing, preventing
leakage
Small number of bearing brackets,
each equipped with connections for
“SPM” vibration and temperature
sensors
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Ball bearings type 2Z (greased for life),
oversized, maintenance free with V seal
Features
Axial thrust lower
than other makes
so longer MTBF.
Improved hydraulics for higher flow
rates and better efficiencies, giving
savings in operating costs.
Shaft deflection meets ISO 5199 thereby
extending seal and bearings life.
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Special sealing rings, closed
at standstill (prevent water
ingress into bearings during
cleaning operations), open
when running (reducing
friction).
Features
Seal chamber provided
with anti - rotation ribs
for best seal
performance and
longer operating life.
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Enhanced safety by using
precision moulded
protective covers.
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No shaft sleeve used for mechanical seal
option. Avoids danger of leakage between
shaft and sleeve. Pump with soft packing equipped with
shaft sleeve for low cost maintenance
Mechanical seal
standards:
•Burgmann MG12
NL & KSB MEGA @ 1450 RPM
KSB MEGA
NL
NL & KSB MEGA @ 2900 RPM
KSB MEGA
NL
NL & KBL DB @ 2900 RPM
KBL DB
NL
NL & KBL DB @ 1450 RPM
KBL DB
NL
NL & ET@ 2900 RPM
ET 2900
NL
NL & ET @ 1450 RPM
ET 1500
NL

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