Products / Kral / Screw Pumps / Screw Pump Series K
Universal use up to 16 bar.
K series pumps are universal three screw pumps, making them the most
sold KRAL pump. The K pumps have a feed pressure of 16 bar and
housing made from nodular cast iron. They are approved for use
onboard ships. In addition, they are equipped with sealed external
bearings that are pre-lubricated for their lifetime so they are not
stressed by the material being pumped and require no maintenance.
How the K three screw pump fits into the KRAL product program.
The K series three screw pump is available with DIN flanges in an inline
configuration, and the KFT series three screw pump is available with DIN
flanges at the top. Various installation methods are possible for
flange-mounting, pedestal and base three screw pumps.
Advantages of t hree screw pumps.
Compared to other types of pumps, KRAL three screw pumps offer high
capacity without taking up much space. This applies in particular at
high differential pressure. The three screw pumps are self-priming, with
low pulsation delivery and can be easily regulated. The single three
screw pumps, single stations and double stations are extremely compact.
All K three screw pumps have an internal safety valve.
Stop coupling damage.
With some liquids, residue can build up, which may cause the pump to
fail. A typical spot for residue to build up is at the mechanical seal.
The residue damages the ball bearing, which runs hot, melts the
elastomeric ring and damages the coupling. With the K series three screw
pump, there is a weep hole next to the mechanical seal, to prevent the
fluid from collecting and building up as residue.
The new generation three screw pumps series K has been thoroughly
reengineered. As the most sold universal three screw pump series K
offers a number of benefits. The three screw pump prevents the
accumulation of residue forming fluids by locating the leakage hole
before the ball bearing. Secondly, KRAL offers the advanced quality of
SiC mechanical seals, which contains graphite, as a solid lubricant to
reduce the coefficient of friction in dry running conditions. The O
rings with high fluorine content are suitable for higher temperatures
and are chemically stable. The three screw pump series K offers
innovative seal concepts. A proven selection of radial rotary shaft
seals, mechanical seals and a hermetically sealed magnetic coupling are
available as standard. A robust and compact design rounds off the
profile.