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Turbine Pump
UTX type (PAT.)
Outstanding self-priming performance with nearly 9m suction lift
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A turbine pump is a convenient pump suitable for handling relatively small
amounts of liquid with high total head.
The YOKOTA Self-Priming Turbine Pump has such strong self-priming power
that it can be used for suction from deep wells with continuous pumping
even if suction or mixture of air occurs. This pump is also suitable for
industrial applications such as filter suction pumping and extraction from
sealed tanks (vacuum tanks).
In any application, this pump enables automatic operation with high reliability.
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Outstanding self-priming performance
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The patented self-priming (water-air separating) mechanism reaches a maximum
vacuum of 90kPa (9m water column) and displays outstanding self-priming
power.
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A large amount of incoming air can be separated and discharged during pumping.
Even if pumping becomes subject to suction or mixture of air due to fluctuations
of suction conditions, it continues pumping, constantly discharging air,
and restores normal pumping operation as soon as suction conditions return
to normal. Even continuous suction of air-containing water (i.e., gas-liquid
two-phase pumping) is possible
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Even if cavitation develops due to fluctuations of suction conditions such
as water level, temperature, or vacuum level on the suction side, this
pump can still continue its pumping operation. Therefore, this pump does
not require allowance for NPSH, and enables stable pumping operation even
under fluctuating suction conditions.
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Thus, it can pump water from a 9m deep well, and it also shows outstanding
performance for extraction from sealed (vacuum) tanks.
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Simple structure without any inlet valve, No need for a foot valve
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Due to its simple structure without any inlet check valve, it is robust
and easy to maintain. Moreover, there is no need for installing a foot
valve or an intermediate valve on the intake side under ordinary operating
conditions.
Operation is also easy with no need for priming.
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Large selection of materials
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A wide variety of materials are available, including FC, SCS and YOKOTA's corrosion and wear resistant special stainless steel casting (YST), to meet the needs of various kinds of liquid.
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Applications
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Self-priming bilge pumps for ships (This pump can be set on the deck of
a medium-size ship for pumping water from the tank bottom.)
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Gas-liquid two-phase flow pumps
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Self-priming water well pumps
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Cooling water pumps for refrigeration and cooling devices
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Pumps for small-scale water-supply systems
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Chemical pumps for chemical industry equipment
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Other
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YOKOTA's proposal: Suctioning up residual liquid from the bottom of mid-sized
chemical tankers ... A bilge pump that can be installed on-deck
The holding tanks on mid-sized chemical tankers must be cleaned when loading
and unloading chemical liquids. As a final step, the residual chemicals
or cleaning liquids that accumulate at the bottom of the tanks must be
completely stripped away and discharged off the ship. A bilge pump is used
for this bottom-stripping operation.
Although a portable submerged pump is normally used as a bilge pump aboard
mid-sized chemical tankers, pulling the pump back up from the bottom of
the tanks and then replacing it is troublesome and can be dangerous aboard
chemical tankers that carry a large amount of toxic or flammable liquids.
For this reason, a pump that is installed on the deck is optimal when considering
ease of use and safety issues. However, there exist difficulties such as
the high suction position and the possibility that a great deal of air
may mix with the pumped liquid due to the pitching of the ship. Therefore,
if a conventional pump tried to suction the liquid under these conditions,
there would be a loss of pumping capacity and pump stoppage, and for this
reason on-deck pumps have not been used.
These concerns have been resolved thanks to the YOKOTA Turbine Pump UTX
type installed on the deck and used for the "bilge pump system".
As seen in the figure below, the YOKOTA Bilge Pump System is installed
on the deck and the pump can easily discharge incoming air while performing
stripping operation to suction away all the liquid to the very last drop.
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YOKOTA Bilge Pump System layout
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Can be installed on the deck.
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Can substantially improve the efficiency of
loading/unloading.
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Safe
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Maintenance is easy and economical.
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YOKOTA Bilge Pump System structure
The YOKOTA Turbine Pump UTX type, in itself, has a strong self-priming
power that allows for continuous suction pumping while discharging air
even if air becomes mixed with the pumped liquid.
However, when performing sweeping operation (stripping) on a chemical tanker:
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A large quantity of air may be suctioned as the liquid sloshes due to the
pitching of the ship.
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Suction piping length is increased for loading/unloading work when switching
out tank contents to a remote one.
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And, even under these more severe than normal conditions, suction pumping
must be performed very rapidly.
For this reason, the Turbine Pump UTX type with a strong self-priming capability
is used as the main pump and is supplemented by a bleed (vacuum) pump to
further increase air discharge capability and reduce self-priming time.
Also, pumped liquid is prevented from penetrating the vacuum pump due to
the operation of the vacuum tank and the float valve installed before the
main pump.
Since this bilge pump system can perform self-priming even if the suction
piping goes over elevated areas or has a large overall length, the bottom
of all tanks can be efficiently stripped and cleaned by using the piping
that branches out from a single pump to each tank and the opening and closing
of the tank valves as shown in the figure above.
Photos of field test performed in shipyard dry dock (Liquid used: water)
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Mock suction piping layout on deck of ship
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Suction height between liquid level (A) and apex (B): 8.5m
Horizontal distance from apex (B) to pump (C): 50m
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This field test demonstrates that a ship using a similar on-deck piping
layout can easily suction liquid to 8.5m high (with a specific gravity
of 1.0).
Therefore, introduction of this bilge pump system will significantly improve
loading/unloading for any midsize tanker with a distance of 8.5m or less
(with a specific gravity of 1.0) from the deck to the bottom of its tank.
Also available for chemical cargo loading/unloading is the YOKOTA Enhanced
Self-Priming Pump UPS type, which can also be installed on the deck to
perform suction pumping. For details, please refer to "Current Topics: Tanker Cargo Handling". |
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Structure
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Part name
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Part name
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1
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Casing
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231
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Stop ring
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2
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Casing cover
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232
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Stop ring
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3
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Partitioning plate
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242
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labyrinth seal
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4-1
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1st-stage impeller
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243
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V-ring
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4-2
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2nd-stage impeller
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25
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Gland packing
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7
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Suction pipe
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27
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Deflector
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9
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Stuffing box
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27-1
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O-ring
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10
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Bearing bracket
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29
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Coupling key
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11
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Bearing cover
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30
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Casing packing
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14
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Gland
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35
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Oil level gauge
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15
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Shaft
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361
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Gasket
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16
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Impeller spacer
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37
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Oil cap
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18
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Seal ring
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39
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Gasket
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19
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Impeller nut
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40
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Key
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20
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Impeller washer
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44
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Support ring
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21
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Ball bearing
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47
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O-ring
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22
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Ball bearing
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49
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O-ring
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As for shaft seal, gland packing, mechanical seals, other, can be selected
in accordance with the application.
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Selection table & Outer dimensions
Selection table
Model
No.
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Bore
(mm) |
Total head
(m)
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50Hz 1500min-1
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Total head
(m)
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60Hz 1800min-1
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10
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15
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20
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25
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30
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40
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15
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20
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30
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40
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50
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60
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Motor
(kW)
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Capacity (L/min)
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Motor
(kW)
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Capacity (L/min)
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UT-X120
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40
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1.5
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50
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30
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20
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1.5
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50
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35
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15
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UT-X220
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40
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1.5
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50
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30
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18
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2.2
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100
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70
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40
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UT-X320
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50
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2.2
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110
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90
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70
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40
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3.7
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140
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105
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70
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30
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UT-X520
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50
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3.7
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115
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100
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85
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55
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5.5
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130
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110
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85
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50
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Outer dimensions
Model
No.
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Motor
(kW)
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Dimensions
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Pump weight
(kg)
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A
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B
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C
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D
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E
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F
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G
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J
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K
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N
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L
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M
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P
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P'
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Z
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n
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X
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UT-X120
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1.5
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342
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143
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135
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115
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105
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185
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314
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152
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110
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350
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570
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250
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50
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14
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15
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3
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90
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35
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UT-X220
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1.5
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342
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143
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135
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115
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105
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185
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314
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152
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110
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350
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570
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250
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50
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14
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15
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3
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90
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35
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2.2
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342
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143
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135
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115
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105
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190
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348
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152
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120
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390
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630
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280
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55
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18
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15
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3
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100
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35
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UT-X320
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2.2
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345
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155
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135
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140
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130
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190
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348
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155
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120
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390
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630
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280
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55
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18
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15
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3
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100
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42
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3.7
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345
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155
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135
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140
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130
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190
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376
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160
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120
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390
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630
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280
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55
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18
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15
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3
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112
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42
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UT-X520
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3.7
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345
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155
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135
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140
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130
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190
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376
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160
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120
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390
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630
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280
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55
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18
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15
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3
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112
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48
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5.5
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345
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155
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135
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140
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130
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205
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445
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140
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150
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480
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780
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330
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70
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25
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19
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3
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132
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48
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Note:
Flange dimensions are based on JIS 10K.
Notes for operation
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At initial operation after installation, please remove the priming plug
on the upper part of the pump casing and fill the pump with water.
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If there is the possibility of freezing in the pump casing when the pump
is stopped under freezing conditions, remaining water inside the pump should
be drained off by removing the drain plug on the lower part of the casing.
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It is characteristic of this type of pump that capacity decreases and horse
power increases when total head is high, therefore please make sure that
the valve on the discharge side is not shut off during operation.
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Installation and piping: Please install an inverse U-bent pipe as suction
piping for efficient self-priming. For details, please refer to the page
for the UHN type.
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Specifications stated here may be subject to change without notice due
to product improvement.
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