SPECIAL FEATURES :
The Monoscrew pumps are rotating positive displacement pumps. With a
positive displacement pump , the mechanical energy produced by a motor, is
transferred via a displacement unit , being either a eccentric screw or a
rotor ; in the form of pressurised energy, over to the liquid residual in
the displacement area. Since the movement of the displacement unit is
rotary one, we talk of rotating positive displacement pumps.
Their
function combines the advantages of centrifugal pumps and oscillating
reciprocating pumps. The mono screw pumps consist of a rotating element,
the displacement unit; being either an eccentric screw or a rotor; and
also a static element , the stator.
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VERTICAL BARREL
PUMP
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The
rotating part, the rotor, has the form of a round rapid motion spiral
spindle with a large pitch. The static element, the stator, is in the
shape of a double- lead interior screw, thereby enabling a double pitch of
the rotor.
Consequently
there are cavities between the rotor and stator which always have the same
size during the rotation of the rotor.
If
the rotor is made to rotate, then these cavities ; and consequently the
substances to be conveyed; are shoved in a screw- like manner from
the suction to the pressure side. The rotors of the PUMPAID mono screw
pumps possess a relatively large eccentricity with respect to the pitch.
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Whereupon it is possible to convey large solid objects through the pumps
without damage. Furthermore the construction length of the pump is reduced
to a minimum. The relatively small rotor surface with minimum friction
permits a low performance from the pumps.
In
order to transfer this movement from the central one of the drive onto the
rotor it is necessary to have a universal joint- propeller shaft with two
compensating knuckle joints. These universal-joint propeller shafts
connect the drive and the rotor. It is not necessary to have another
bedding for the rotor other than in the stator. |
MICROPROCESSOR
OPERATED DOSING PUMP WITH AUTO STORAGE CONTROLLER
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The
watertight line between the rotor and the stator is specified for each
rotor setting. This means that the pressure area is always separated from
the suction area. The mono screw pumps can withdraw themselves and are
thereby regenerative. This self-priming capability is achieved without the
assistance of fluids.
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CONSTRUCTION
* Casing & Covers : Pressure tested graded cast iron.
* Gears & Shafts : Carbon steel-spur or Double helical gears
* Bearings : Antifriction or Bush Bearings.
* Sealing : Lip type or Mechanical seal. Gland packing for Abrasive or
highly
viscous liquids.
* Testing : Each pump tested for its performance.
Tests can be offered to any inspection authority.
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