TECHNICAL SPECIFICATION
DESMI Pumping Technology A/S
Tagholm 1
9400 Nørresundby
– Denmark
Tlf. nr.: +45 96 32 81 11
Fax +45 98 17 54 99
21
E-mail: [email protected] www.desmi.com
4.
TECHNICAL SPECIFICATION
4.1. Work range
The working range depends on the basic hydraulic design, the type of connection and sealings.
The module in the pumps with the strictest specification determines the allowable pressure and
temperature of the medium in the pumps. Pumps with ATEX (explosion safety) marking, which are
applied in explosive hazardous atmospheres, have an additional restriction of the medium
temperature. The general working specifications can be summarized as follows:
Media temperature range for:
Lower limit temperature: - 20°C (minus 40°C for brine pumps in ductile iron with spec. seal)
Upper limit temperature: +80°C for fresh water (up to 150°C with special shaft seal),
+40°C for sea water (up to +60°C seawater in Super Duplex pumps
with special shaft seal)
(The pump is suitable for pumping of clean fresh water with temperatures up to 100
C when ball bearing mounted on
pump shaft, and up to 140
C when without ball bearing mounted on pump shaft. For pumping of clean fresh water with
temperatures above 100
C, DESMI only delivers ductile iron (for instance GGG40) or martensitic stainless steel (for
instance 1.4436) for pump casing and rear cover.)
Ambient temperature range for:
Lower limit temperature: - 20 °C
Upper limit temperature: + 45 °C
(1. Avoid freezing the pump.
2. If the ambient temperature exceeds the above value or the motor is located more than 1000 m above sea level, the
motor cooling is less effective and could require an adapted motor power. Please contact your supplier for more detailed
advice.)
Media density and viscosity
Density: Max. 2500 kg/m3
Viscosity: Max. 500 cSt.
(Pumping liquids with a higher density and/or viscosity than water requires more mechanical torque from pump shaft and
more power from the electric motor. This could cause overloading of the pump shaft and motor. Contact your supplier for
advice, if needed.)
Summary of Contents for NSL 100-215
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