| VERTICAL
GLANDLESS PUMP |
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FOR
LEAKPROOF AND MAINTENANCE FREE |
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PUMPING
OF CORROSIVE AND ABRASIVE LIQUIDS |
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WITHOUT STUFFING BOX & SEAL |
| Principal
of the Glandless Pump |
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| The
"VIJAY" Pump is similar hydraulic
design to any conventional centrifugal pump. It differs in so far as it is always
mounted in the vertical position. A restriction is provided above the impeller
and need for any from of liquid seal is obylated by allowing a small leakage to
escape by way of an overflow connection in the upper pump body return to suction
vessel. The
most suitable method of installation will depend on the pumping application. The
simplest and most widely adopted method is to mount the pump close to the feed
tank at such a level that the impeller is flooded and the pump therefore pumped
when the liquid reaches a certain height in the tank. The pump will deliver liquid
until the suction pipe becomes uncovered, when it will run dry until the liquid
level is restored to the point where re-printing can take place, this cycle of
operation may be repeated indefinitely.
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| Operation
Advantage of Glandless Pumps |
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The obvious main advantage is the removal of problems arising from the use of
mechanical seal, stuffing box and internal bearing.
The
ability of pump to run dry removes one cause of breakdown which is often attributable
to the human element this feature is very useful in process requiring continuous
transfer of a corrosive liquid with a high degree of reliability e.g. Disposal
of acid effluent.
The
glandless pumps lend itself to process incorporating automatic control of a pump
discharge valve. The "controlled leakage" acts as an integral
by-pass. The pump suffers no ill effects if the discharge valve is partially or
fully closed.
The
most important gains to be derived from the use of glandless pump are in the sphere
of maintenance and consequent reduction in down time production losses. Normal
maintenance on the glandless pump is confined to lubrication of the driving
|
| The
Salient Features of Vertical Glandless Pump |
- No mechanical
seal, stuffing box and internal bearings provided.
-
No maintenance since the pump can even run dry indefinitely as there is no packing,
bushes or internal Bearings.
-
Reduction of downtime production losses in view of above features.
- All
the wet-end parts are in solid molded construction to with stand corrosion and
erosion.
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The impeller is semi-open type used in our all-vertical pumps to suit both clear
and polluted fluids.
- Pump
mounted outside the suction tank and is not submerged type.
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| Application |
PHOSPHORIC
ACID PLANTS : | | H3PO4,
H2SO4, HF and their mixtures with or without solids (gypsum) up to 40% conc. |
| GAS
WASHING PLANTS : | | Scrubbed
liquids contining F, CL, SO2, Ammonia gases etc. With solids Replace hastally. |
| RAYON
PLANTS : | | Spin
bath solution (H2SO4, ZnSO4, Na2SO4 etc.) | | CAUSTIC
SODA PLANTS : | | Chlorinated
brine, conc. HCL, H2SO4 etc. Other application are in metal refineries, pickling
Installations, paper and fertilizer plants-in fact all chemical process industries. |
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| Range
of Performance |
Because
glandless pumps do not have any packing bush or internal bearing, full advantage
can be taken of available drive speeds. The pump may be run at 1450 and 2900 RPM
respectively and a range of impeller diameter for each pump size gives a wide
spread of performance.
In
general the range cover flow up to 100m3/hr. and discharge head up to 50 meters.
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