____________________________________________________________________________________
DESMI Pumping Technology A/S
1
Tagholm 1
9400 Nørresundby
–
Denmark
Tel: +45 96 32 81 11 Fax: +45 98 17 54 99
E-mail:
1. PRODUCT DESCRIPTION
These operation and maintenance instructions apply to the DESMI NSLH and NSLV Spacer pump.
The pump is a single-stage vertical end suction centrifugal pump equipped with stainless steel shaft,
mechanical shaft seal, and closed impeller.
The pump is suitable for the pumping of liquids with temperatures up to 80
o
C. With special shaft seal up
to 120
o
C. Max. working pressure and number of revolutions are indicated under Operating Data.
The pump is particularly suitable for the pumping of water in connection with cooling systems, cooling of
diesel engines, as bilge pumps, ballast pumps, fire pumps, brine pumps, pumps for irrigation, fish farms,
water works, district heating, salvage corps, army and navy, etc.
The descriptions in the operation and maintenance instructions are divided into two parts covering the
groups
ø215/265
and
ø330/415/465/525
, as the designs of these two groups are different. The numbers
refer to the standard impeller diameter of the pump. E.g.:
ø215/265:
Pumps with ø215 or ø265 impellers:
The back of the impeller is equipped with relief blades to reduce the load on the bearings.
ø330/415/465/525:
Pumps with ø330, ø415, ø465 or ø525 impellers:
The back and the front of the impeller are equipped with sealing rings and relief holes to reduce the load
on the bearings.
1.1 DELIVERY
- Check on delivery that the shipment is complete and undamaged.
- Defects and damages, if any, to be reported to the carrier and the supplier
immediately in order that a claim can be advanced.
2. TECHNICAL DATA
The pumps are manufactured in various material combinations which appear from the type number on the
name plate. See below.
2.1 EXPLANATION OF THE TYPE NUMBER
All the NSLH and NSLV pumps are provided with a name plate. The type number indicated on the name
plate is built up as follows:
NSLHXXX-YYY-MR-Z or NSLVXXX-YYY-MR-Z
XXX: Pressure branch diameter, YYY: Standard impeller diameter
M: The material combination of the pump.
R: The assembly combination of the pump.
Z: Other variants
