salmson NFCH series, Installation And Operating Instructions Manual

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ENGLISH
10
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
tm
/ E
20b
With E
20b
: material modulus of elasticity at 20°C and E
tm
at calculation
temperature.
Assembly on cast iron base frame :
Discharge z axis :
DN
flan
ge F
y
(N)
F
z
(N)
F
x
(N)

F
(N)
M
y
(N.m)
M
z
(N.m)
M
x
(N.m)

M
(N.m)
32 490 610 520 940 440 490 640 920
40 580 730 640 1130 520 610 750 1100
50 780 960 870 1510 580 670 810 1200
65 990 1220 1070 1900 640 700 870 1280
80 1190 1450 1310 2280 670 750 930 1370
100 1570 1940 1740 3040 730 840 1020 1500
125 1860 2290 2060 3600 870 1100 1220 1860
Suction x axis :
DN
flan
ge F
y
(N)
F
z
(N)
F
x
(N)

F
(N)
M
y
(N.m)
M
z
(N.m)
M
x
(N.m)

M
N.m)
50 870 780 960 1510 580 670 810 1200
65 1070 990 1220 1900 640 700 870 1280
80 1310 1190 1450 2280 670 750 930 1370
100 1740 1570 1940 3040 730 840 1020 1500
125 2060 1860 2290 3600 870 1100 1220 1860
150 2610 2350 2900 4550 1020 1190 1450 2130
Assembly on grouted cast iron base frame :
Discharge z axis :
DN
flan
ge F
y
(N)
F
z
(N)
F
x
(N)

F
(N)
M
y
(N.m)
M
z
(N.m)
M
x
(N.m)

M
(N.m)
32 550 680 580 1040 490 560 720 1030
40 690 860 760 1340 610 710 870 1280
50 980 1200 1090 1890 700 800 970 1440
65 1290 1590 1400 2480 800 880 1100 1620
80 1600 1950 1750 3070 880 1000 1220 1810
100 2150 2670 2390 4180 1020 1180 1420 2110
125 2600 3210 2880 5030 1310 1650 1830 2790
Suction x axis :
DN
flan
ge F
y
(N)
F
z
(N)
F
x
(N)

F
(N)
M
y
(N.m)
M
z
(N.m)
M
x
(N.m)

M
N.m)
50 1090 980 1200 1890 700 800 970 1440
65 1400 1290 1590 2480 800 880 1100 1620
80 1750 1600 1950 3070 880 1000 1220 1810
100 2390 2150 2670 4180 1020 1180 1420 2110
125 2880 2600 3210 5030 1310 1650 1830 2790
150 3700 3330 4110 6450 1620 1900 2320 3410
5.2.7 SCOPE OF DELIVERY
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
6.1 PRODUCT INFORMATION
NFCH pump is a single stage PN16 volute casing pump designed for
horizontal installation. Dimensions meet EN733 requirements.
The back pull ‐ out design of the bearing assembly permits dismantling of
the impeller while suction and discharge lines are fastened to casing
flanges.
If a coupling spacer is used the motor won’t have to be moved rearward
during maintenance operation.
This pump is designed to handle thermal oils up to 350°C.
A carbon ‐ antimony bearing located behind the impeller reduces the
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
specific design a standard sealing without external cooling is used.
The mechanical seal housing design added to a vent valve makes pump
venting easier and reduces the risk of dry running.
6.2 FUNCTION
NFCH pump is a centrifugal pump with axial fluid inlet and radial outlet.
Depending on required discharge pressure the pump speed can be 1450
or 2900 RPM.
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.
NFCH pumps are not self ‐ priming pumps. Suction line and pump casing
should be completely filled with liquid before pump start.
When necessary or when a maximum pumping efficiency is required
several possibilities are offered to adapt capacity/pressure.
Modification of the system hydraulic characteristics :
A regulating valve is added at the discharge side of the pump. The
hydraulic loss can be adjusted and so the pump duty point.
Modification of pump characteristics :
Use of a frequency inverter gives the possibility to adjust pump speed.
The pump hydraulic curve is modified to reach required duty point but
impeller diameter is unchanged.