Home
Главная
CALPEDA
Центробежные насосы
N4 65-160B/A
Инструкция по эксплуатации Страница: 9

CALPEDA N4 65-160B/A [9/44] Horizontal end suction centrifugal pumps pn 10 with bearing bracket

Horizontal end-suction

centrifugal pumps PN 10

with bearing bracket

In accordance with european standard EN 733

N, N4

OPERATING INSTRUCTIONS

1. Operating conditions

Standard construction

- For clean liquids, without abrasives, non-explosi-

ve and non-aggressive for pump materials.

Maximum

liquid temperature: 90 °C.

Maximum permissible pressure in pump casing:

10 bar.

Maximum ambient

temperature: 40°C.

- Rated speed of rotation (50 Hz):

N = 2900 r.p.m.; N4 = 1450 r.p.m.

Maximum permissible rotation speed: see table

on page 12.

Rated motor power

N (2900 r.p.m.) up to kW: 2,2 7,5 30 75

N4 (1450 r.p.m.) up to kW: 7,5 30 75

Sound pressure dB (A) max: 70 80 85 90

Starts per hour max: 60 40 20 10

2. Installation

N, N4 pumps (with nominal duty points and main

dimensions in accordance with EN 733 are inten-

ded for use with standard electric motors in IM B3

construction form (IEC 34-7, IEC 72), connected

by means of a baseplate and driven by a flexible

coupling. The pump-motor units are intended for

use in the horizontal position.

Lift and transport the pump-motor unit as indica-

ted in fig. 1.

Place the pump as close as possible to the suc-

tion source (with consideration of

NPSH).

Normally, the pump-motor unit must be protected

from the weather and exposition to the sun’s rays.

Make sure motor ventilation is not impeded and

provide access around the unit for inspection and

maintenance during operation.

2.1. Foundation

The smaller units are mounted on a single-piece,

channel-steel baseplate with a high degree of

torsional strength.

Whith this type of construction a foundation is not

indispensable, in the case of units of limited wei-

ght and when light loads are expected through

pipelines.

However, a raised foundation will facilitate drai-

ning of pump casing and will provide extra height

for safety in the case of a risk of flooding.

When the smaller units, positioned on single-

piece, metal baseplates, are placed directly on a

floor surface, only the anchor bolts need to be

imbedded in concrete (fig. 2).

For the larger units and, in particular for those

mounted on a welded steel-section baseplate, it

is necessary to provide for a foundation base in

reinforced concrete to withstand the load and

strain derived from the unit and from the pipes, to

maintain the alignment and to avoid vibration of

the unit (see also sections 3.1., 4.).

Position the unit and provide support for the base-

plate with separators or wedges to obtain proper

horizontal alignment with a spirit-level, leaving

between the baseplate and the rough scarfed sur-

face of the foundation a clearance of 1-2 inches

(25÷50mm) for the grouting.

With the welded metal baseplates, it is sufficient

for the grout to rise a little above the lower part to

allow for imbedding of the anchor bolts and to

provide a stable base with uniform distribution of

the load over the support surface of the baseplate

(fig. 3).

Tighten uniformly all anchor bolts when the grout

has become solid (normally at least 48 hours after

pouring).

Fig. 1 Sling with ropes for lifting the pump-motor unit.

Fig. 2 Foundation for unit mounted on single-piece,

channel-steel baseplate.

Fig. 3 Foundation for unit mounted on welded,

steel-section baseplate.

4.93.036

.93.038/1

4.93.038

4.93.038/1

Содержание

Похожие устройства

Horizontal end suction centrifugal pumps PN 10 with bearing bracket Make sure motor ventilation is not impeded provide access around the unit for inspection maintenance during operation In accordance with european standard EN 733 The smaller units are mounted on a single piece channel steel baseplate with a high degree of torsional strength Whith this type of construction a foundation is not indispensable in the case of units of limited wei ght and when light loads are expected through pipelines However a raised foundation will facilitate drai ning of pump casing and will provide extra height for safety in the case of a risk of flooding When the smaller units positioned on single piece metal baseplates are placed directly on a floor surface only the anchor bolts need to be imbedded in concrete fig 2 2 1 Foundation N N4 OPERATING INSTRUCTIONS 1 Operating conditions Standard construction For clean liquids without abrasives non explosive and non aggressive for pump materials Maximum liquid temperature 90 C Maximum permissible pressure in pump casing 10 bar Maximum ambient temperature 40 C Rated speed of rotation 50 Hz N 2900 r p m N4 1450 r p m Maximum permissible rotation speed see table on page 12 Rated motor power N 2900 r p m up to kW 12 2 7 5 30 75 N4 1450 r p m upto kW 7 5 30 75 Sound pressure 70 80 85 90 60 40 20 10 dB Starts per hour max A max and and 2 Installation N N4 pumps with nominal duty points and main dimensions in accordance with EN 733 are inten ded for use with standard electric motors in IM B3 construction form IEC 34 7 IEC 72 connected by means of a baseplate and driven by a flexible coupling The pump motor units are intended for use in the horizontal position Lift and transport the pump motor unit as indica ted in fig 1 Fig 2 Foundation for unit mounted on single piece channel steel baseplate For the larger units and in particular for those mounted on a welded steel section baseplate it is necessary to provide for a foundation base in reinforced concrete to withstand the load and strain derived from the unit and from the pipes to maintain the alignment and to avoid vibration of the unit see also sections 3 1 4 Position the unit and provide support for the base plate with separators or wedges to obtain proper horizontal alignment with a spirit level leaving between the baseplate and the rough scarfed sur face of the foundation a clearance of 1 2 inches 25 F50mm for the grouting With the welded metal baseplates it is sufficient for the grout to rise a little above the lower part to allow for imbedding of the anchor bolts and to provide a stable base with uniform distribution of the load over the support surface of the baseplate Fig 1 Sling with ropes for lifting the pump motor unit Place the pump as close as possible to the suc tion source with consideration of NPSH Normally the pump motor unit must be from the weather and exposition to the sun s rays protected Fig 3 Foundation for unit mounted on welded steel section baseplate Tighten uniformly all anchor bolts when the grout has become solid normally at least 48 hours after pouring 9

Скачать