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Centrifugal
Slurry
Pump
Wilfley
M o d e l KTechnical Handbook
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Wilfley Model K Pumps
A Slurry Pump for the Most Abrasive Slurries
Single stage Side suction Horizontal To 12" discharge
Sealess Design
The Wi lf ley Expeller No water gland, pump or piping
No mechanical seals No air pressure No stuffing box
A Wilfley Can Run Dry becausethere is no Rubbing Contact whileRunning
No dilution No contamination No leaking while running
Wilfleys are sealed by hydraulicpressure while running. Thiscentrifugal seal is created by theexpeller which was developed morethan 80 years ago. Wear isminimized on the Wilfley expellerbecause it operates against suctionpressure only.
Leakless at Shutdown
The Wi lf ley Check Valve Long wear life Low cost Reliable Easily cleaned
When the K is shut down, thecheck valve seals against the shortcylinder head.
Maintenance
The Wi lf ley Design Advantage Quick change wear parts Dual Side intake
Maintenance is a majorconsideration in the development of
all Wilfley Pumps. All moving partsin the K can be changed withoutdisturbing the suction or dischargepiping.
Service-Support
Wilfley Integrity Large replacement inventory Engineering assistance for the lifeof the pump Quality craftsmanship
A.R. Wi lf ley & Sons has alwaysproduced the finest sealesscentrifugal pumps. W ilfley iscommitted to quality, durability andcustomer satisfaction. Wilfley stillsells parts for and services pumpsthat have been in continuousservice for more than 80 years. It isa tradition at Wilfley. The Wilfley K continues the legacy that is A.R.Wilfley & Sons.
Discharge
Expeller createspressure keepingfluid from shaft.
Impeller pumpsfluid from intaketo discharge
Suction Inlet
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General Installation Recommendations
This list will help establish specificpumping conditions.
Solution Temperature Static Head Discharge Pipe Size Length, Discharge Pipe Discharge Pipe Fittings Equivalent Length Discharge Pipe Total Head
Maximum Suction Pressure Minimum Suction Pressure CapacityGPM Specific Gravity % Solids by Weight Maximum Size of Solid Particles Mesh Analysis Electrical Characteristics Viscosity
Choosing Pump Location
The following recommendationsmay be helpful when choosing thebest location for your pump.
a. Locate the pump as close to theliquid source as practical so thatthe suction pipe is short and directwith a minimum of elbows, fittingsand valves
b. Place the pump in a location sothat the unit is accessible forinspection during operation as wellas for maintenance operationsinvolving removal and disassembly.
Foundation
The founda tion should besufficiently substantial to absorbany vibration and to form apermanent, rigid support. A concrete foundation on a solid baseis satisfactory. Foundation bolts of the proper size should beembedded in the concrete locatedby the outline drawing.
Alignment The pump and motor are al igned atthe factory before shipment.Realignment may be necessary afterthe complete unit has been leveledon the foundation and after thefoundation bolts have beentightened. Explicit directions forchecking and aligning the pumpcomponents may be found in theHydraulic Institute Standards.
Wilfley hydraulic seal in actual operation.
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Features and Components
This closed type impeller withextra thick shrouds and vanesis available in standard portdesign or wide port design forviscous, frothy, or large particleslurries. The unique designhelps to maintain excellentperformance characteristicsthroughout its wear life.
Crane assembly (not illustrated)allows the case to be opened orremoved quickly without usingseparate lifting equipment.(available in sizes 3" through 8")
The extra heavy wall thickness andspecial volute design extends wear life.
The impeller bolt functions both asa shear pin and to hold the impelleragainst the taper of the shaft.
The integrated bell-shaped expellerprovides a positive hydraulic leakagesealing arrangement eliminatingmaintenance associated with packing,water glands, or mechanical seals.
The heavy section follower platecan be rotated to prolong wear life.
The frame protecting ring is made ofabrasion resistant material to protect
the inlet chamber from excessive wear.
The rear inlet design allows for removalof the case without disturbing piping,reduces surging, controls pre-whirl, andcan be vented for froth applications.
The case bolts are extra largeso that fewer are required.Each nut is convenientlylocated for quick disassembly.
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The discharge keeperassembly supports thedischarge piping duringmaintenance so that the
case can be opened orremoved withoutdisconnecting piping.
The centrifugallyoperated check valveprovides a seal atshut-down and opensthe seal at start-up toinsure that there is norubbing contact whilethe pump is running.
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The draw bolt is provided to adjust forwear to maintain peak pump performance.
The shaft is made of extrastrength, high quality steel.Bearing shoulder diameters areground for precision bearing fits.
Convenient, sturdy oil fillerelbow allows for simplepositive check on oil level.
The long cylinder has a largeoil reservoir for superior bearinglubrication. Bearing bores aremachined to precise concentricityfor proper bearing alignment.
The frame base is made of castiron with heavy rib reinforcementto withstand stresses.
Rubber Lined Intake Chamber optional
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1. Impeller Seal Face Adjustment -to maintain efficiency
One of the losses in a centrifugalpump is the re-circulation of thepumpage in the pump case backinto the suction of the impeller. Theamount of re-circulation dependsupon the clearance between theimpeller and the follower plate.On the Wilfley Model K pump aMINIMUM clearance is maintainedby a simple adjustment. This Wilfleyfeature is appreciated by all operatorsbecause it eliminates the need forincreasing the pump speed, addingmakeup water, early replacement of pump parts and other methods of maintaining efficiency.
2. Quick Change out of Wear Parts -to minimize down time
The five key wear parts case,impeller, follower plate, frameprotecting ring and die ring canbe changed within a few minuteswithout disturbing the suction or
discharge piping. This quick changeis made possible by the case crane(available on sizes 3"-8"), dischargekeeper, the use of only four casebolts, and the manner in which theimpeller is attached to the shaft.
This exclusive Wilfley feature savesvaluable time and manpower overother solids handling pumps that mayrequire hours to make accomplishsuch required maintenance.
Maintenance Features
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K Pump Capacities
2x1 2 1 / 2 x11 / 2
175
150
125
100
75
50
25
H - F
T .
10 100 1,000 10,000
CapacityGPM
4x24x2 1 / 2
5x3 6x4 8x5 10x6
12x8
14x10
16x12
Model K 2" x 1" through 12" x 8"Model L 14" x 10" through 16" x 12"
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General Characteristics
Model K pumps are available indischarge sizes ranging from 1"to 12". Cram arm assemblies thatsupport the case during maintenanceare available in discharge sizes 3"to 8". Larger pumps, designatemodel L use support base to slidethe case away from the pump.Special pump configurations areavailable for high suction head andextreme horsepower services. Eachpump is engineered to match serviceand system requirements.
Special Modifications
We are equipped to modify pumpsthat are used for special services.Such things as flush ports, speciallubrication systems and specialdrain plugs are common. We willalso engineer modifications requiredto fit your specific installation.
We provide engineering modificationsfor related pumping problems such
as maintenance and installation. Manyapplications require specific motor
and drive configurations as well asbase plates and mounting brackets.We will design and produce theseitems to your specifications andsatisfaction. We also have the capabilityto supply pumps with a number of exotic corrosion resistant paints.
Materials of Construction
A.R. Wilfley & Sons produces model K pumps in a variety of hard irons andstainless steels including proprietaryallows specially developed to standup to the difficult erosive-corrosiveconditions found in slurry services.
Wilfley Model K pumps are alsoavailable in natural rubber, syntheticelastimers and urethane.
Wear in a slurry pump is a complexprocess. It is a function of: The size and concentration of the
solid particles The shape and hardness of the
solid particles Temperature PH level
This type of wear invo lves sl idingand impact erosion in conjunctionwith corrosion. This combinationintensifies the effects of eachindividual type of wear. Materialhardness, fracture toughness andcorrosion resistance must beproperly balanced to providereasonable wear resistance. A.R.Wilfley & Sons developed proprietaryalloys that optimize this balance forpumping conditions where standardallows were not adequate. Maxalloy5 and Maxalloy 8 are two proprietaryalloys that significantly surpasstraditional white iron and NiHard incorrosion, erosion and corrosion-erosion services.
A. R. Wil fl ey & So ns has ov er80 years of experience designing,manufacturing and applying slurrypumps and can provide theexpertise to assist in selection of pumps and materials for a widevariety of difficult services.
Material
White ironNiHard 4
Maxalloy 5
Maxalloy 8
HardnessHBN
400-600620-670
580-720
415-520
TensileStrength(psi)
45,00080,000
80,000
90,000
FractureToughness(psi)
12,00022,000
30,000
20,000
ApplicationRange(pH)
5 84.5 8.5
3.6 9.5
1.3 12.2
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Pump Weights and Sump Dimensions
Complete Metal Pumps
Pump Size
Bare Pump
Direct Driven Pump with baseplate and flexible coupling
Overhead V-Belt Driven Pump withFixture (Less Sheeves & Belts)
Approximate Shipping Weight in Pounds
1
430
640
700
1 1 / 2
450
665
720
2
680
1060
950
21 / 2
690
1060
960
3
1030
1350
1300
4
1675
2120
2185
5
2150
2600
2820
6
2550
3350
3140
8
4150
5450
4850
10
6320
8230
7420
12
7900
10290
9275
14
9875
12860
11600
Sump DimensionsPump Size
WInches
HInches
I Inches
1" & 1 1 / 2"
18
36
46
2" & 2 1 / 2"
24
36
57
3"
30
42
68
4"
36
48
79
5"
4842 Min.
54
9690 Min.
6"
6048 Min.
66
118106 Min.
8"
7260 Min.
72
135123 Min
10"
8475 Min.
8475 Min.
166150 Min.
12"
132120 Min.
8475 Min.
166150 Min.
14"
150
96
192
16"
190
108
210
Intake Sump
It is desirable to feed the Wilfleypump by means of sump tank orfeed box placed as close to thepump as possible. Recommendedsump sizes are given below. Whenthe feed to the pump is increasedor decreased, the material in thesump simply seeks a higher orlower level, respectively. Hopperbottom sumps are much moresatisfactory than flat bottom sumps.
A sloping pipe from the intake sumpinto the pump is particularly desirablewhen handling materials that settlequickly, such as concentrates andcoarse sands, or when the quantityis small for the size of intake pipeand pump. Long suction pipesrequire sufficient velocity in the pipeto prevent setting.
Suction Piping
Suction pipe may be connected toeither or both sides of the pump andneed not be disturbed to change thepumping parts or bearing unit.
It is preferred that thesump tank is designatedfor a minimum of 3minutes restriction time.
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I
CL of Intake
45 o
45 o
45 o
H
WW
Alternative SumpConstruction
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Dimensions in Inches
Size
111 / 2221 / 234
568
Discharge
111 / 2221 / 234
568
Suction
221 / 24456
81012
A
5959651 / 2651 / 267801 / 2
91931 / 2114
B
11 1 / 411 1 / 4131 / 8131 / 8145 / 8157 / 8
171 / 2181 / 224
C
3737423 / 4423 / 4423 / 4461 / 4
6361763 / 4
D
101011 3 / 411 3 / 4131 / 4141 / 2
1617223 / 8
E
11111212121 / 416
14161 / 4243 / 4
F
1111103 / 4103 / 412181 / 4
14161 / 4121 / 2
G
93 / 893 / 811 1 / 211 1 / 2131 / 8141 / 8
153 / 8165 / 8215 / 8
*H
2424281 / 2285 / 83140
433 / 8553 / 4627 / 8
J
13131515161 / 4203 / 8
22233 / 4281 / 4
K
1111131 / 2135 / 8143 / 4195 / 8
213 / 831**345 / 8
L
11 / 211 / 213 / 413 / 431 / 25
851 / 291 / 2
M
51 / 451 / 261 / 261 / 277 / 893 / 4
11 3 / 8121 / 4133 / 4
N
101 / 4101 / 411 3 / 411 3 / 4131 / 215
151 / 2187 / 820
O
2233 / 833 / 853 / 861 / 4
33 / 453 / 491 / 4
P
75 / 875 / 891 / 891 / 8137 / 8121 / 2
20171 / 422
Q
11 / 211 / 217 / 817 / 817 / 817 / 8
11 / 217 / 821 / 4
R3 / 43 / 43 / 43 / 43 / 43 / 4
7 / 87 / 87 / 8
S
223 / 8223 / 8253 / 4253 / 42315 / 16273 / 4
34377 / 8375 / 8
T
11 / 811 / 811 / 211 / 211 / 211 / 2
13 / 413 / 413 / 4
U
411 / 16413 / 1657 / 16511 / 1677 / 891 / 2
103 / 411 3 / 4161 / 4
V
413 / 16413 / 1661 / 1661 / 16513 / 168
33 / 445 / 810 1 / 4
Dimension P is the minimum clearance for removing wearing parts. Provide ample clearance at this point for removing the wearingparts as they are very heavy.Dimension K is distance from center of pump to outside of discharge sleeve.Dimension N is distance from center of pump to outside of suction flange. the feed may be from either side.Use 1 1/2" pipe sleeves around foundation bolts and allow 1/2" for grouting. Place valves in suction and discharge lines near pump.The suction line should be short, free from elbows if possible, and sloping when heavy materials or large particles are to be pumped.*Dimension H is the maximum height of the pump.**Rubber pump 22
Direct Driven
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Size
111 / 2221 / 234
568
Discharge
111 / 2221 / 234
568
Suction
221 / 24456
81012
A
281 / 4281 / 4303 / 4303 / 4295 / 8321 / 4
36401 / 2483 / 4
B
81 / 481 / 497 / 897 / 811 1 / 81213 / 16
141520
C
233 / 4233 / 4263 / 8263 / 8267 / 826
30351 / 840
D
7785 / 885 / 897 / 8119 / 16
121 / 2131 / 2181 / 2
E
11 / 411 / 411 / 411 / 411 / 411 / 4
11 / 211 / 211 / 2
F
41 / 241 / 243 / 843 / 823 / 461 / 4
653 / 883 / 4
G
61 / 261 / 28891 / 4107 / 8
12131 / 2171 / 4
*H
2121251 / 8251 / 8271 / 2351 / 2
393 / 8503 / 4565 / 8
J
10101119 / 321119 / 32123 / 4157 / 8
18183 / 422
K
1111131 / 2131 / 2143 / 4195 / 8
213 / 831**345 / 8
L
11 / 211 / 213 / 413 / 431 / 25
851 / 291 / 2
M
51 / 451 / 261 / 261 / 277 / 893 / 4
11 3 / 8121 / 4133 / 4
N
101 / 4101 / 411 3 / 411 3 / 4131 / 215
151 / 2187 / 820
O
45 / 845 / 861 / 461 / 4883 / 4
89121 / 4
P
991111151 / 415
231925
Q
11 / 211 / 213 / 413 / 413 / 421 / 2
221 / 43
R3 / 43 / 43 / 43 / 43 / 43 / 4
7 / 87 / 87 / 8
S
21 / 221 / 241 / 841 / 8315 / 169
91 / 4103 / 8105 / 8
T
7781 / 281 / 2611 / 16151 / 4
151 / 4153 / 4193 / 8
U
11 / 811 / 423 / 825 / 841 / 164
31 / 433 / 843 / 4
V
39 / 1639 / 1631 / 1631 / 16313 / 1651 / 2
71 / 283 / 811 1 / 2
W
771 / 287 / 891 / 811 5 / 8141 / 2
163 / 8167 / 8195 / 8
X
17 / 1617 / 16111 / 16111 / 1621 / 823 / 16
25 / 825 / 833 / 16
Y
31 / 431 / 441 / 241 / 241 / 267 / 16
73 / 1673 / 1685 / 16
AA3 / 83 / 83 / 83 / 81 / 21 / 2
5 / 85 / 83 / 4
AB3 / 163 / 163 / 163 / 161 / 41 / 4
5 / 165 / 163 / 8
Dimension P is the minimum clearance for removing wearing parts. Provide ample clearance at this point for removing the wearingparts as they are very heavy.Dimension K is distance from center of pump to outside of discharge sleeve.Dimension N is distance from center of pump to outside of suction flange. the feed may be from either side.Use 1 1/2" pipe sleeves around foundation bolts and allow 1/2" for grouting. Place valves in suction and discharge lines near pump.The suction line should be short, free from elbows if possible, and sloping when heavy materials or large particles are to be pumped.*Dimension H is the maximum height of the pump.**Rubber pump 22
Bare Pump
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Dimensions in Inches
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Pump
10L12XL12L
A
171 / 4171 / 422
B
261 / 4261 / 417
C
202031
D
232331
E
1818235 / 8
F
793 / 4793 / 487
G
23 / 423 / 42
H
51 / 251 / 279 / 16
J
183 / 419219 / 16
K
241 / 2241 / 2281 / 2
L
111171 / 4
M
191923 1 / 4
N
181 / 2201 / 2211 / 2
OMin.-Max.
171 / 2-19 1 / 220-2220-22
PMin.-Max.
66-68703 / 4-72 3 / 472-74
QAve.
2111 / 162111 / 16231 / 2
R
929 / 32929 / 32133 / 16
SDia.
33 / 433 / 441 / 8
Key
1 / 2 X11 / 2 X11 / 2 X1
T
161518
U
5858593 / 4
Suction & Discharge Flange Diameters (125 Lb. Amer. Std.)
Pump10L12XL12L
AA141418
BB10,12,1412,14,16,18,2012,14,16,18,20
Pump14XL14L16XL
AA182020
BB14,16,18, 20,2414,16,18, 20,2416, 18, 20, 24, 30
L Series
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Dimensions in Inches
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A.R. Wi lf ley & Sons, Inc.
P.O. Box 2330
Denver, Colorado 80201
303/779-1777
1-800-525-9930
FAX 303/779-1277
www.wilfley.com