Ulvac PKS-030 User manual

SK00-4330-DI-002-01
No.030402
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INSTRUCTION MANUAL
OILSEALED ROTARY VACUUM PUMP
MODEL
PKS-016
PKS-030
PKS-070
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Components division
ULVAC, Inc.
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Readthismanualbeforeoperationandkeepitatyour
handforimmediatereference

CAUTION:
Subjectingthispumptolowtemperatures(below4℃)maycausewaterpipesand/orjackets
toburst.
Ifapumpislocatedoutsideandsubjectedtofreezingtemperatures,disconnectthewater
inletfromitswatersupply.Coolingwaterinthewaterpipeand/orjacketsshouldbe
blownoutbycompressedair.
Failuretodosomaycausethewatertofreeze,anddamagetothewaterpipeand/orjackets
mayresult.

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Table of Contents
1. Inspection ･･･････････････････････････････････････････････････････････ 4
2. Mounting ････････････････････････････････････････････････････････････ 5
3. Oil filling ････････････････････････････････････････････････････････････ 5
4. Electrical connections ･････････････････････････････････････････････････ 6
5. Fitting and detaching of V-belts ････････････････････････････････････････ 7
6. Vacuum system connection ････････････････････････････････････････････ 8
7. Gas ballast valve ･････････････････････････････････････････････････････ 10
8. Operation ････････････････････････････････････････････････････････････10
9. Ultimate pressure ････････････････････････････････････････････････････ 12
10. Periodical checking ･･･････････････････････････････････････････････････ 13
11. Oil replacement ･･･････････････････････････････････････････････････････13
12. Vacuum pump oil for low temperatures ･････････････････････････････････ 14
13. Major expendable parts ･･･････････････････････････････････････････････ 15
14. Pump oil characteristics table ･･････････････････････････････････････････16
 SERVICE CENTER

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INTRODUCTION
The ULVAC-PKS Series pumps are suitable for industrial use in medium or high
vacuum pumping systems.
The PKS Series are self-contained rotary, oil sealed piston type units, and are
designed for the best possible stability and small floor space, and have well proven
reliability. We recommend that you use "ULVOIL-R-7" rotary pump oil specified
by ULVAC for best results. However, any good quality mechanical vacuum pump
oil is suitable with the PKS Series, although we do suggest that you consult with a
vacuum specialist first.

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SPECIFICATIONSFORTHEPKS
Model
Description PKS-016 PKS-030 PKS-070
Displacement ［L/min］1600 3000 7000
6.7×10-1 6.7×10-1 6.7×10-1
*Ultimate Pressure ［Pa］
Ultimate Pressure with
gas-ballast ［Pa］6.7×1016.7×1016.7×101
Power required ［kW］2.2［4-poles］3.7［4-poles］11［6-poles］
Pump revolution ［RPM］425 400 400
Max. water vapor pumping
rate ［kg/hr］2.4 5 9
Oil required ［L］6.5 8 20
Cooling water required [L/min] --- 3 5
Weight (without motor) ［kg］225 380 900
* "Ultimate pressure" is measured by "Mcleod Gauge".

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1.Inspection
When unpacking, check the following items,
1) Is the pump received of the exact model you have ordered?
2) Are the complete accessories present?
2-1) In case you have ordered a motor-less pump, the following items should
be present in the pack:
2-2) In case you have ordered a pump, with motor, the following items should
be present in the pack:
2-1): Motor-less Pump 2-2): Pump with Motor
1.Pump 1.Pump
2.Pump-base 2.Pump-base
(Type: PKS-016 only) (Type PKS-016 only)
3.V-belts 3.V-belts
4.Belt-cover 4.Belt-cover
5. Pulley-cover 5. Pulley-cover
6.Motor-Pulley 6.Motor-Pulley
7.Anchor-bolts 7.Anchor-bolts
8.Pumpoil 8.Motor
9.Pumpoil
3) Visually inspect if there is any damage to the pump and the parts caused by
transportation.
4) Check for any looseness of screws or nuts, or for any disconnection of parts.
Note: Shouldyouhave noticedanytrouble ordamagewiththe pumpor its
accessories,pleaseimmediatelynotifyourdistributororcontactULVAC's
InternationalDepartmentdirectly.

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2.Mounting
1) Set the PKS as near as possible to the vacuum equipment, insuring that
water and exhaust connections can be conveniently made.
2) The PKS should be mounted on a rigid foundation such as a concrete floor,
and made level by shimming or grouting if necessary, and bolted in place.
[Refer to Fig. 7, 8, 9]
Note:Excessiveenvironmentaldust,acidfumes,solventvaporetc.,shouldbe
avoided.
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3.OilFilling
[Refer to Fig. 7, 8, 9]
1) Remove the “Oil-Filler Cap” (See Fig. 4 〜6) and make sure that the “Oil
Drain Valve” is closed.
2) Fill the pump with ULVAC's specified oil (ULVOIL-R-7) until the oil level can
be observed at the oil level window attached to the side of the pump. (See Pig. 4
~ 6)
The optimum level is 5 mm above the lower line of the window glass while the
pump is running. This level will change slightly after the first few hours of use.
In most cases oil should be added after operating the pump for a short while.
Note:Iftheamountofoilcontainedinthepumpismotappropriate,the
performanceofthepumpwillbeunsatisfactory.

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3) Pour oil into the Oilers. (See Fig. 4 ~ 6)
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4.ElectricalConnections
Make all electrical connections in accordance with the following procedures.
1) Connect the power lines to the motor terminals before fitting the belts.
2) Check the fuses at the terminal. The fuses should be rated at the value
shown in the following table.
Type Motor Fuse
PKS-016 2.2 kW (4P) 20A
PKS-030 3.7kW (4P) 30A
PKS-070 11kW (6P) 100A

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3) Connect "oil feeding-solenoid valve" to the pump line to interlock with the
pump. (Refer to Fig. 1)
Fig. 1. Standard electrical connection
Note:Separatewiringwilleventuallybe,requiredifyouuseamotorrated
atdifferentlinevoltageandcyclefromthoseforthesolenoid.Make
surethepropervoltageandcurrentaresuppliedtoboththemotorand
thesolenoidcoil.Bothmayfailtooperateifthevoltageislessthan
90%ormorethan110%ofthatrated.
4) Activate the motor and observe the direction of rotation of the motor pulley.
5) An arrow SYMBOL [like this: ] is put on the belt-cover to
indicate the correct rotation direction. If the pump does not rotate in the right
direction, interchange any two of the three-phase leads.
6）Fit V-belts.
5.FittingandAdjustingtheV-belts
1) Never touch the V-belts while the pump is running.
2) At approximately the center of the span, between motor pulley and the pump,
apply 4 to 5 pounds of pressure on the V-belts by hand. If the tension is
correct, the resulting deflection should be about 1.5 cm (〜1/2").

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3) The belt becomes slightly longer after it has been used. Adjust the tension of
the belt once a week after the Start of operation.
4) The adjustment of the belt-tension should be made by shifting the motor base.
Tighten adjusting nuts or bolts securely after such adjustments.
Caution:Maintenanceofproperbelttensionisimportant.
Tootightorlooseadjustmentisharmfultotheshaft-bearings.Too
looseanadjustmentallowsthebelt-toslipandshortenthelife-time
ofthebelt.
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6.VacuumSystemConnection
1) Be sure that the inside of the vacuum equipment, i.e., pipes and vacuum
valves, are clean and free from excessive moisture or liquid, chips, rust, dust,
etc. before you connect the system with the PKS pump.
Caution:Mechanicaltroublewillresultifthepumpbreathsmetalchipsor
visibledust.Also,ifthepumpevacuatesexcessivemoisture,both
theguaranteedultimatepressureandthepump'sinternalmechanism
willbeeffected.Excessivemoisturemaycauseinternalcorrosion.

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2) It is recommendable to install a vacuum valve [A] between the equipntent
and the pump. (See Fig. 2)
[Fig. 2]
Standard vacuum system piping for PKS
When the pump stops, close vacuum valve [A] to keep the equipment under
vacuum, then open leak valve [B] to vent the pump, thus preventing oil
counter-flow within the pump.
3) It is advisable to install a metallic flexible connection between the pump
intake and vacuum piping to eliminate vibration.
Caution:Awirenet(i.e.,suctionfilter)isprovidedwithinthepump
intaketopreventlargersolidsfromenteringthepump.Pleasedo
notremovethiswiremesh.
Note:Thisnetshouldbecleanedperiodicallyaccordingtoyourspecific
maintenanceschedule.

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7.Gas-BallastValve
A gas ballast valve is provided on the side of the PKS. (Ref. DWG. Fig. 4 ~ 6)
When condensable gases such as steam or solvents, etc. are pumped, compressed
gases may be condensed and mixed into the pump oil.
Such gases circulate inside the pump and may effect both the ultimate pressure
and also shorten the life of the pump's shaft seals and bearings. Consequently
the life of the pump itself will be shortened. But in this pump, when a
condensable gas is pumped, such a gas can be discharged out of the pump through
the exhaust valve without condensing it into the pump oil, by opening the gas
ballast valve after the pump temperature increases sufficiently. (When gases
other than condensable gases are pumped, operate the pump with the gas ballast
valve closed).
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8.Operation
8.1Pumpstart
Recheck the prescribed installation once more. Operate the pump in
accordance with the following procedures to obtain the best performance of the
pump.
1) Close the vacuum valve [A] (as shown in Fig. 2) and open the leak valve [B].
2) Turn the motor-switch on.
3) Close the leak valve [B] when the pump is rotating at a constant speed.
4) Check the oil-feeding solenoid valve for proper operation.
Note:Ifthepumpdoesnotrotatesmoothly,dothefollowing;
1) Checkthepowersupply
2) Checkthechargedoillevel.Iftheproblemstillpersists,contact
ULVACorULVAC'sdistributor.

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5) When the pump is kept running for several hours, the oil temperature in
the case will be rise to about 70℃at a room temperature of 20℃. If the oil
temperature exceed 70℃when the gas ballast valve is kept closed, some
trouble might be suspected. Please stop the pump and contact ULVAC or
ULVAC's distributor at once.
6) If the pump does not start rotating, the pump cylinder might be filled with
oil. Open the leak valve to attempt to correct this problem.

8.2Pumpstop
1）Close vacuum valve [A].
2）Stop the motor and vent the pump. Open the leak-valve [B].

Note:Makesuretheleakvalveisopenedwhenthepumpisstoppedor,in
thecageofapowerfailure,preventthepumpandvacuumsystemfrom
floodingwithoil.
Note:Oilcirculation
Pump oil will be introduced into the filter case through the
oil-feedingsolenoidvalve.
1) PKS-016oil-flowcheck.
Removethefilterbodycap,Observetheoil-flow[SeeFig.4]
2) PKS-030orPKS-070oil-flowcheck.
Observetheoilfilterwindow.[SeeFig.5〜6]
Note:Coolingwaterconnection
1)ThePKS-016pumpisair-cooled.
2)ThePKS-030orPKS-070pumpiswater-cooled,soyoumustconnect
thepumptoawatersupply.(Ref.Fig.3)


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[ Fig. 3]

9.UltimatePressure
"Ultimate Pressure" refers to the lowest attainable pressure of the pump.
Therefore, this pressure should be measured under the most favorable conditions.
It should be measured, using new pump oil, by means of a vacuum gauge installed
at the inlet of the pump; the rest of the vacuum system should be functionally
disconnected from the pump.
The measured values of the ultimate pressure of the rotary vacuum pump may
slightly a depending upon the kind of vacuum gauge used. According to the
"Japan Industrial Standard" [JIS] "ultimate pressure" is determined by means of a
McLeod gauge which is capable of measuring the partial pressure of air only.
If the ultimate pressure is measured without disconnecting the vacuum
equipment, the observed pressure may be higher than the specified ultimate
pressure of the pump due to the influence of the vapor or various kinds of gas
produced from water condensation or rust adhering to the inner wall of the
equipment. If any other gauge except McLeod gauge is used, the
above-mentioned difference may be very larger.

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10.PeriodicalChecking
Check the following points periodically.
1) Check for looseness of bolts and nuts.
2) Check to see if the gas-ballast valve is properly operating.
3) Check the wire net on the inlet port and clean it.
4) Check the oil amount circulating and the degree of contamination through the
transparent glass on the filter lid. (in case of Type PKS-016: See the oil level
gauge)
Replace the vacuum pump oil periodically. It is advisable to replace the oil 2
~ 3 times a year.
11.Oil replacement
It might be necessary to exchange oil when the ultimate pressure of the pump
itself is higher or the oil becomes too dirty. It is often the case where the ultimate
pressure is not attainable simply because the pump oil is too old. It is most
important to replace the pump oil if any condensable gases have been pumped or if
any sludge is present on the bottom of the oil basin. If sludge is present, it is
necessary to wash it out by repetitive oil changes. Please replace oil in accordance
with the following procedures.
1) Open the drain-valve and drain most of the oil. Activate the pump for 3 ~ 5
seconds. This will cause the remaining to be completely drained.
2) Close the drain plug and fill new oil from the suction pipe.(means inlet)
After running for a minute, drain the oil in the same way as the above step.
3) Repeat steps 1) ~ 2) several times. The pump will be almost clean
4) Finally, close the drain valve and fill the specified amount of new oil.

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12. Vacuum Pump Oil for Low Temperature
The specified oil is ULVOIL-R-7. In low temperatures (below about. 10℃) may
experience difficulty with starting the pump. Therefore, cheek the following
points carefully; belt tension, motor fuse, smoothness of rotation. If the pump
still can not be started easily, despite normal behavior the above check points, try
using ULVOIL-R-4 oil.
Caution:Inhightemperature(aboveabout10℃),(ULVOIL-R-7)oilshould
beused.


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13.MajorExpendableParts(PartsNo.:SeeFig.-9,10)
Model1: PKS-016 (Parts No.: See Fig. 10)
Parts No. Description Q'ty
(18) Bearing No.6307 2
(24) Oil-seal VC-40625 2
(23) Oil-seal SC-406212 2
(25) Oil-seal SC-355511 1
(11) O-ring JISB-2401 G-75 2
(8) O-ring JISB-2401 G-105 2
Model2: PKS-030 (Parts No.: See Fig. 11)
Parts No. Description Q'ty
(22) Bearing No.6410 2
(25) Oil-seal VC-65885 2
(26) Oil-seal SC-658812 2
(27) Oil-seal TC-478012 2
(21A) O-ring JISB-2401 P-50 2
(12A) O-ring JISB-2401 G-130 1
Model3: PKS-070 (Parts No.: See Fig. 12)
Parts No. Description Q'ty
(19) Bearing No.21313 2
(22) Oil-seal VC-70955 1
(23) Oil-seal SC-709513
(Vacuum tight type) 1
(25) Oil-seal VC-65886 1
(26) Oil-seal SC-658812
(Vacuum tight type) 1
(24) Oil-seal TC-658812 2
(13) O-ring AN 6230-31 2

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14.PumpOilCharacteristicsTable
(Table-1) shows the characteristics of pump oils. If you could not get the
specified oil ULVOIL-R-7, you may use another kind of pump oil having almost the
same characteristics as (Table-1).
ROTARY VACUUM PUMP OIL
[Table - 1]
OIL ULVOIL-R-4 ULVOIL-R-7
Component (%)
Saturated
Hydrocarbon 85
Unsaturated
Hydrocarbon 15
Saturated
Hydrocarbon 85
Unsaturated
Hydrocarbon 15
Molecular weight 400 〜420 450 〜470
Specific Gravity
at 15℃0.89 0.89
Viscosity 37.8℃
(Centistokes) 98.9℃
40 〜50
5 〜7
65〜75
7 〜9
Viscosity 50℃
(Redwood second) 80℃
100 〜120
>50
170 〜180
> 60
PourPoint (℃) -15℃-15℃
FirePoint (℃) > 210 > 210
Acid Value (mg KOH/gr) < 0.01 < 0.01
Residual Carborn (%) < 0.05 < 0.1
Vaporized Componemt (%)
98℃x 5hr < 0.03 < 0.02
VapourPressure (Torr) <1X10
-4 < 1 X 10-5

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