______________________________________________________________________________
DESMI Pumping Technology A/S
3
Tagholm 1
9400 Nørresundby – Denmark
Tel: +45 96 32 81 11 Fax: +45 98 17 54 99
E-mail:
[email protected] www.desmi.com
1. PRODUCT DESCRIPTION
These operation and maintenance instructions apply to the DESMI MODULAR H Monobloc pump
series. The pumps are available in sizes ranging from 40 to 80 mm on the pressure flange. The
suction flange is bigger than the pressure flange. DESMI H is a single-stage centrifugal pump with
stainless steel shaft, mechanical shaft seal, and closed impeller. The pump is suitable for the
pumping of clean and polluted liquids with temperatures between 0 and 80°C. With special shaft
seal and ball bearing up to 120°C. Max. number of revolutions: 3600 RPM.
The pump has horizontal inlet on the centre line and vertical outlet at the top. The back of the
impeller is equipped with relief blades to reduce the load on the bearings. Relief holes in the
impeller ensure circulation of liquid for the shaft seal and prevent overheating of the shaft seal
during normal operation.
The pump is particularly suitable for the pumping of water in connection with washing plants, air
conditioning, cooling systems, and sanitary systems, etc. Furthermore, in the majority of cases
where the transport of liquid is required within industry.
1.1 DELIVERY
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Check on delivery that the shipment is complete and undamaged.
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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 nameplate. See below.
2.1 EXPLANATION OF THE TYPE NUMBER
All the H-pumps are provided with a nameplate. The type number indicated on the nameplate is
built up as follows:
H-XX-YYY-MR
XX.YYY: Pump size
M: The material combination of the pump.
R: The assembly combination of the pump.
M may be the following:
A: Standard. Casing: GG20. Impeller:AlBz.
C: All cast iron.
D: Casing: RG5, Impeller: AlBz.
E: Casing and shaft seal cover: NiAlBz and bronze alloy. Impeller and sealing rings: NiAlBz.
