Table des Matières
Publicité
Les langues disponibles
Les langues disponibles
ENGLISH
Following coefficients were applied to basic values :
Pump assembled on cast iron base:
Forces : 0,4 x F
base
Moments : 0,4 x F
base
Pump assembled on grouted cast iron base frame :
Forces : F x [1,5 – (12,5/Flange DN)]
Moments : M x (1 + Flange DN/250)
Coefficient due to flange rating :
C = 1,45 on forces and moments
Temperature correction for temperature > 110°C :
C = E
/ E
tm
20b
With E
: material modulus of elasticity at 20°C and E
20b
temperature.
Assembly on cast iron base frame :
Discharge z axis :
F
F
F
y
z
x
(N)
(N)
(N)
32
490
610
520
40
580
730
640
50
780
960
870
65
990
1220
1070
80
1190
1450
1310
100
1570
1940
1740
125
1860
2290
2060
Suction x axis :
F
F
F
y
z
x
(N)
(N)
(N)
50
870
780
960
65
1070
990
1220
80
1310
1190
1450
100
1740
1570
1940
125
2060
1860
2290
150
2610
2350
2900
Assembly on grouted cast iron base frame :
Discharge z axis :
F
F
F
y
z
x
(N)
(N)
(N)
32
550
680
580
40
690
860
760
50
980
1200
1090
65
1290
1590
1400
80
1600
1950
1750
100
2150
2670
2390
125
2600
3210
2880
at calculation
tm
F
M
M
M
y
z
x
(N)
(N.m)
(N.m)
(N.m)
940
440
490
640
1130
520
610
750
1510
580
670
810
1900
640
700
870
2280
670
750
930
3040
730
840
1020
3600
870
1100
1220
F
M
M
M
y
z
x
(N)
(N.m)
(N.m)
(N.m)
1510
580
670
810
1900
640
700
870
2280
670
750
930
3040
730
840
1020
3600
870
1100
1220
4550
1020
1190
1450
F
M
M
M
y
z
x
(N)
(N.m)
(N.m)
(N.m)
1040
490
560
720
1340
610
710
870
1890
700
800
970
2480
800
880
1100
3070
880
1000
1220
4180
1020
1180
1420
5030
1310
1650
1830
Suction x axis :
F
y
(N)
50
1090
65
1400
80
1750
100
2390
125
2880
150
3700
5.2.7
Pump can be delivered as a complete pump set including electrical
motor, flexible coupling, coupling guard and baseplate. It can be also
delivered without one of those parts. A CE integration certificate is then
supplied.
This instructions and operating manual is part of the pump supply and
should be delivered attached to the pump. If not, ask SALMSON
Customer department to get it.
ATEX pumps may be delivered with specific instrumentation. Refer
to pump technical datasheet or to acknowledgment of order to
know exhaustive scope of supply.
6
DESCRIPTION AND WORKING PRINCIPLE
M
6.1 PRODUCT INFORMATION
(N.m)
NFCH pump is a single stage PN16 volute casing pump designed for
920
horizontal installation. Dimensions meet EN733 requirements.
The back pull-out design of the bearing assembly permits dismantling of
1100
the impeller while suction and discharge lines are fastened to casing
1200
flanges.
1280
If a coupling spacer is used the motor won't have to be moved rearward
during maintenance operation.
1370
This pump is designed to handle thermal oils up to 350°C.
1500
A carbon-antimony bearing located behind the impeller reduces the
1860
overhang. Mechanical seal is located close to the ball bearing assembly.
The length of the mechanical seal housing and its inner diameter
adjusted to pump shaft diameter added to external cooling fins reduce
drastically fluid temperature in mechanical seal chamber. Thanks to this
M
N.m)
specific design a standard sealing without external cooling is used.
The mechanical seal housing design added to a vent valve makes pump
1200
venting easier and reduces the risk of dry running.
1280
6.2 FUNCTION
1370
NFCH pump is a centrifugal pump with axial fluid inlet and radial outlet.
1500
Depending on required discharge pressure the pump speed can be 1450
1860
or 2900 RPM.
2130
An impeller turns inside the pump casing (direction of rotation is
clockwise seen from drive end). The rotation movement is transmitted
to the fluid that is driven to the vanes and then pumped to the discharge
flange where it leaves the pump. In the flow passage of the pump casing
the kinetic energy of the fluid is converted into pressure energy.
M
NFCH pumps are not self-priming pumps. Suction line and pump casing
(N.m)
should be completely filled with liquid before pump start.
When necessary or when a maximum pumping efficiency is required
1030
several possibilities are offered to adapt capacity/pressure.
1280
Modification of the system hydraulic characteristics :
1440
A regulating valve is added at the discharge side of the pump. The
hydraulic loss can be adjusted and so the pump duty point.
1620
Modification of pump characteristics :
1810
Use of a frequency inverter gives the possibility to adjust pump speed.
2110
The pump hydraulic curve is modified to reach required duty point but
impeller diameter is unchanged.
2790
10
F
F
F
M
z
x
(N)
(N)
(N)
(N.m)
980
1200
1890
700
1290
1590
2480
800
1600
1950
3070
880
2150
2670
4180
1020
2600
3210
5030
1310
3330
4110
6450
1620
SCOPE OF DELIVERY
M
M
M
y
z
x
(N.m)
(N.m)
N.m)
800
970
1440
880
1100
1620
1000
1220
1810
1180
1420
2110
1650
1830
2790
1900
2320
3410
Publicité
Table des Matières
