PD66342 GB 2001-02 SRU Rotary Lobe Pump Application The SRU range of rotary lobe pumps has been designed for use on wide ranging applications within the Brewing, Dairy, Food, Pharmaceutical and Chemical industries. The SRU pump can handle from low to high viscosity media and is suitable for CIP (Cleaning In Place) and conforms to USA 3A Sanitary Standard. The characteristic smooth, low shear pumping action is ideal for products such as creams, gels, emulsions, aerated mixtures, and delicate cells and organic solids in suspension. The SRU range is compact in size and highly efficient, capable of flow rates up to 106 m³/h and pressures up to 20 bar. The new improved modular design provides for greater application flexibility and cost effective easy maintenance. Standard Design Pump Gearbox The SRU pump with its conventional lobe pump design concept has a robust cast iron gearbox, which provides maximum shaft rigidity and easy oil seal replacement. The SRU range in series 1-4 has a universal gearbox design. This gives the flexibility of mounting pumps with the inlet and outlet ports in either a vertical or horizontal plane by changing the foot position. The SRU range in series 5 & 6 has dedicated gearbox castings, which also allows the inlet and outlet ports to be in either the vertical or horizontal plane. A quality epoxy paint system is used on the gearbox exterior for optimum protection against natural and corrosive elements. Pumphead Construction The SRU in standard specification has sanitary design full bore inlet and outlet ports to International Standards, maximising inlet and outlet port efficiency and NPSH characteristics. Enlarged diameter and rectangular ports are also available to handle very high viscosity products. The SRU in standard specification has tri-lobe rotors with the option of bi-lobe rotors for handling fluids containing large delicate solids. All rotors are available in three temperature ratings allowing the pump to be operated at maximum process temperatures of 70°C, 130°C and 200°C for both fluid pumped and CIP.
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PD66342 GB2001-02
SRU Rotary Lobe Pump
ApplicationThe SRU range of rotary lobe pumps has beendesigned for use on wide ranging applications within theBrewing, Dairy, Food, Pharmaceutical and Chemicalindustries. The SRU pump can handle from low to highviscosity media and is suitable for CIP (Cleaning InPlace) and conforms to USA 3A Sanitary Standard.The characteristic smooth, low shear pumping action isideal for products such as creams, gels, emulsions,aerated mixtures, and delicate cells and organic solidsin suspension.
The SRU range is compact in size and highly efficient,capable of flow rates up to 106 m³/h and pressures upto 20 bar. The new improved modular design providesfor greater application flexibility and cost effective easymaintenance.
Standard DesignPump GearboxThe SRU pump with its conventional lobe pump designconcept has a robust cast iron gearbox, which providesmaximum shaft rigidity and easy oil seal replacement.The SRU range in series 1-4 has a universal gearboxdesign. This gives the flexibility of mounting pumps withthe inlet and outlet ports in either a vertical or horizontalplane by changing the foot position. The SRU range inseries 5 & 6 has dedicated gearbox castings, which alsoallows the inlet and outlet ports to be in either thevertical or horizontal plane.A quality epoxy paint system is used on the gearboxexterior for optimum protection against natural andcorrosive elements.
Pumphead ConstructionThe SRU in standard specification has sanitary design fullbore inlet and outlet ports to International Standards,maximising inlet and outlet port efficiency and NPSHcharacteristics. Enlarged diameter and rectangular portsare also available to handle very high viscosity products.
The SRU in standard specification has tri-lobe rotorswith the option of bi-lobe rotors for handling fluidscontaining large delicate solids. All rotors are availablein three temperature ratings allowing the pump to beoperated at maximum process temperatures of 70°C,130°C and 200°C for both fluid pumped and CIP.
Max. size of spherical solids (mm)
Tri-lobe rotors
6
6
6
9
9
11
11
15
15
18
18
24
Bi-lobe rotors
8
8
8
13
13
16
16
22
22
27
27
37
SRU1/005
SRU1/008
SRU2/013
SRU2/018
SRU3/027
SRU3/038
SRU4/055
SRU4/079
SRU5/116
SRU5/168
SRU6/260
SRU6/353
Maximum Solid Size Capability
Materials of ConstructionPump gearbox – high quality grade CIGR14 grey castiron.Pumphead – product wetted components in 316 typestainless steel.Product wetted elastomers of EPDM, NBR, FPM all FDAconforming. Also PTFE for chemical applications.
Weight
Model Bare Shaft Pump (kg)Horizontal Vertical
porting portingSRU1/005 15 16SRU1/008 17 18SRU2/013 28 30SRU2/018 29 31SRU3/027 53 56SRU3/038 56 59SRU4/055 105 111SRU4/079 110 116SRU5/116 152 152SRU5/168 160 160SRU6/260 260 260SRU6/353 265 265
Shaft Seal Options• Single or single flush/quench (steam barrier for
aseptic application) R90 or Hyclean type mechanicalseals.
• Double R90 type mechanical seal for flush.• Packed gland (unflushed or flushed versions).
Materials for Mechanical SealsCarbon/Stainless steel, Tungsten Carbide/TungstenCarbide, Silicon Carbide/Silicon Carbide or variations ofthese materials to suit fluid being pumped and/orapplication requirements. (N.B. Material variants are notavailable on all R90/Hyclean seal types)
Pump SizingIn order to correctly size a rotary lobe pump someessential information is required. Provision of thisinformation listed below enables our Customer Supportpersonnel to obtain the optimum pump selection.
Product/Fluid Data- Fluid to be pumped- Viscosity- SG/Density- Pumping temperature, minimum, normal and
maximum- Cleaning in Place temperature(s), minimum, normal and
maximum
Performance Data- Flow rate, minimum, normal and maximum- Discharge head/pressure (closest to pump outlet)- Suction condition
Standard Specification Options- Specification of inlet and outlet ports (Screwed male to
BSP, DIN11851, Rdg, SMS. ISS/IDF, RJT, IAMD/3A,Tri-clamp and other standards, or Flanged to BS4504/DIN2533, ASA/ANSI 150, BS10E and other standards)
- Rotorcase Cover with integral Pressure Relief Valve- Heating/Cooling Saddle Jackets for Rotorcase and
Jacket for Rotorcase Cover (not available when reliefvalve fitted)
- Bi-lobe Rotors in stainless steel and non-galling alloy.- Electropolished product wetted components- Complete pump unit comprising: Pump + Baseplate
(mild or stainless steel) + coupling with guard +Geared electric motor suitable for (or supplied with)frequency speed control or manual variable speeddrive (advise motor enclosure and electrical supply).
Fig. 1
Flows/Pressures/Connections
Note 1. These pressure ratings may vary for pumps with certain threaded connections.
1 3
3
005008
013013018018
027027038038
055055079079
116116168168
260260353353
L or HL or H
L or HL or HL or HL or H
L or HL or HL or HL or H
L or HL or HL or HL or H
L or HL or HL or HL or H
L or HL or HL or HL or H
DD
SDSD
SDSD
SDSD
SDSD
SDSD
SRU1/005/LD or HDSRU1/008/LD or HD
SRU2/013/LS or HSSRU2/013/LD or HDSRU2/018/LS or HSSRU2/018/LD or HD
SRU3/027/LS or HSSRU3/027/LD or HDSRU3/038/LS or HSSRU3/038/LD or HD
SRU4/055/LS or HSSRU4/055/LD or HDSRU4/079/LS or HSSRU4/079/LD or HD
SRU5/116/LS or HSSRU5/116/LD or HDSRU5/168/LS or HSSRU5/168/LD or HD
SRU6/260/LS or HSSRU6/260/LD or HDSRU6/353/LS or HSSRU6/353/LD or HD
Litres/rev
0.0530.085
0.1280.1280.1810.181
0.2660.2660.3840.384
0.5540.5540.790.79
1.161.161.681.68
2.602.603.533.53
Imp gall/100 rev
1.171.87
2.822.823.983.98
5.855.858.458.45
12.1912.1917.3817.38
25.5225.5236.9536.95
57.2057.2077.6577.65
US gall/100 rev
1.42.25
3.383.384.784.78
7.037.0310.1510.15
14.6414.6420.8720.87
30.6530.6544.3944.39
68.7068.7093.2693.26
mm
2525
25254040
40405050
50506565
65658080
100100100100
in
11
11
1.51.5
1.51.522
22
2.52.5
2.52.533
4444
mm
-40
40405050
50506565
65658080
8080100100
100100150150
in
-1.5
1.51.522
22
2.52.5
2.52.533
3344
4466
bar
85
1015710
1015710
1020715
1020715
1020715
psi
11575
145215100145
145215100145
145290100215
145290100215
145290100215
rev/min
10001000
1000100010001000
1000100010001000
1000100010001000
600600600600
500500500500
Pum
p he
ad C
ode
Gea
rbox
L - H
oriz
onta
l Por
ting
H -
Ver
tical
Por
ting
Sha
ftS
- S
tain
less
Ste
elD
- D
uple
x S
tain
less
Ste
el
1
2
3
4
5
6
Sanitary Enlarged
SRU Build Selection SRU Model Displacement Inlet and Outlet Differential MaximumSeries Connection Size Pressure Speed
See Note 1
Working PrincipleThe positive displacement of the SRU pump is provided by non-contacting, contra rotating tri-lobe or bi-loberotors within a fully swept pump chamber. All SRU pumps are capable of bi-rotational flow without modification.
42
1 42
Sanitary Equipment, HeadquarterAlfa Laval ABP O Box 73SE-221 00 LUND, SwedenTelephone: +46 46 367000Fax: +46 46 367150Email: [email protected]
PD
663
42 G
B 2
001-
02
Dimensions
PUMP
SRU1/005/LSRU1/008/L
SRU2/013/LSRU2/018/L
SRU3/027/LSRU3/038/L
SRU4/055/LSRU4/079/L
SRU5/116/LSRU5/168/L
SRU6/260/LSRU6/353/L
A
2525
2540
4050
5065
6580
100100
B
9595
105105
125125
150150
175175
190190
C
90.590.5
115115
137.5137.5
163163
195195
225225
D
189189
233233
273273
325325
376376
429429
E
1010
1515
1818
2020
2020
2020
F
1616
2222
2828
3838
4545
4848
G
4040
5050
6161
8080
110110
110110
HB
6868
8585
100100
115115
135135
155155
HT
113113
145145
175175
211211
255255
295295
J
3030
3232
4040
6363
7070
7070
K
55
66
88
1010
1414
1414
L
285295
339348
437450
541558
627650
748777
M2
4248
6063
82.587
101110
97108
124.5140
N
124124
131131
176176
224224
279279
266266
P
8080
100100
125125
150150
180180
260260
Q
1010
1919
3030
3535
3535
4040
R
100100
132132
181181
202202
275275
370370
S
100100
124124
154154
184184
210210
220220
T
8080
100100
125125
150150
180180
190190
U
1010
1212
1414
1414
1414
1414
Vertically ported
Horizontally ported
All dimensions in mm
The information contained herein iscorrect at the time of issue, but may besubject to change without prior notice.
PUMP
SRU1/005/HSRU1/008/H
SRU2/013/HSRU2/018/H
SRU3/027/HSRU3/038/H
SRU4/055/HSRU4/079/H
SRU5/116/HSRU5/168/H
SRU6/260/HSRU6/353/H
A
2525
2540
4050
5065
6580
100100
B
9595
105105
125125
150150
175175
190190
C
113113
147147
175175
213213
256.5256.5
295295
D
208208
252252
300300
363363
431.5431.5
485485
E
1515
1515
2222
2525
3030
3030
F
1616
2222
2828
3838
4545
4848
G
4040
5050
6161
8080
110110
110110
J
3030
3232
4040
6363
7070
7070
K
55
66
88
1010
1414
1414
L
285295
339348
437450
541558
627650
748777
M1
5357.5
70.573.5
71.579.5
8695
100.5112
134146
N
117117
124124
161161
197197
264264
267267
P
8080
100100
155155
200200
200200
260260
Q
2222
1212
1515
1717
2020
2020
R
114114
124124
185185
234234
240240
300300
S
104104
124124
155155
184184
220220
250250
T
8080
100100
125125
150150
180180
210210
U
1010
1212
1414
1414
1414
1414
X
22.522.5
3030
37.537.5
4848
6060
7070
All dimensions in mm
M1
4650.5
63.566.5
86.594.5
109118
106117
134.5147
M2
4955
6770
67.572
7887
91.5103
124139
M1 denotes standard port dimension forsuperseded range.
M2 refers to enlarged or sanitary port.
M1 denotes standard port dimension forsuperseded range.
M2 refers to enlarged or sanitary port.
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