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  Two-Rotameter
 
2W.W TWIN SCREW PUMP
   


1.Briefintroduction 
 On the base of deeply researching overseas advanced technique, according to the present-day practical demands of gas-oil mixed transporting,2W.WH--type out board bearing double suction dual screw multiphase mixed transporting pump and 2W.Wseries double screw pump are researched and developed by our company, then we follow the regulations of the national standard GB11035-89 and produced it. Through engagement together between driving screw and driven screw and the match between screw and pump body hole, and then form many sealing empty cavities, when the screw is rotational ,these sealing empty cavities move ahead continually, push the liquid in the sealing cavity to the exit and then discharged, so the purpose of transporting the liquid can be realized.
Its working principle is as chart 1

2.The advantage of the twin-screw pump  
 1、Transporting the liquid smoothly without any disturbing and pulsation, no impulse, with less vibration and low noise.
 2、It has strong self-suction performance, when multiphase mixed transporting, the gas content can not over 80%,and the san content can not over 500g/m3.
 3、Outboard bearing structure which adopt independently lubricate, so all kinds of nonlubricate medium can be transported.
 4、It adopts synchronous gear driving, between the two rotors there is no touch at all, even though idling for short term is no problem.
 5、The pump body has heating jacket, so it can transport all kinds of clean or low viscosity or high viscosity medium which contain the particulate solids.(the diameter of the particulate is usually less than 0.12-0.2mm)
 6、If selecting the material correctly, some corrosive medium can be transported.
 7、Double-suction structure, and there is no axial force on the rotor.
 8、The shaft ends adopt mechanical seal or corrugated pipe mechanical seal, it has the characteristic of long-life, less leak, wide scope of application.
Performance scope  
 1、The highest pressure 4.0MPa
 2、 Capacity range 1~1000m3/h
 3、Temperature range -20~120℃
 4、Thee viscosity of the medium 1~3000mm2/s,when lower the speed of the rotation it can be up to 106mm2/s
 The viscosity of the medium will largely influence the twin screw pump, the nominal discharge of the pump means the discharge under the certain viscosity condition, in order to ensure the pump to work on the high efficiency working condition, when the test is not enough, we suggest to select the speed of the rotation according to the following viscosity.
  The viscosity of the medium cSt      Speed r/min
  <400                  1500
  400 ~1200                1000
  1200~3600                750
 When the viscosity of the medium is higher , the customer should contact with the manufacturer for the speed of rotation and motor power.
Application example
 1、Oil field:Used as the multiphase mixed transporting pump and crude oil transporting pump and the like which can transport oil,gas,water,tiny solid particulate.
 2、shipbuilding:Using as marine loading pump, ballast pump an sewage treatment pump , main machine lubricating pump and fuel oil pump.
 3、Petrochemical industry:Using as loading and transporting pump which can transport all kinds of resin,pigment , paraffinwax,paint,rinting ink, emulsoid, all kinds of oil crude oil, heavy oil and the like.
 4、Power plant:Using as heavy oil, crude oil transporting pump, main machine lubricating pump.
 5、Food industry:Using as transporting pump which can transport alcohol,honey,syryp,juide,fixde oil,milk,slurry oil.
Structure characteristics
 This kind of pump adopt double-suction structure , both ends of screw are in the same pressure cavity, axial force an be balanced automatically. The bearing of both ends adopt external installing, an being lubricated a lone by using lubricate, so it won't be influenced but the medium. A couple of synchronous gears are used to drive the screws, so the screws surface can't touch at all, and there is a tiny clearance between the two screws. the impurity in the medium can not fray the screws surface directly(except scour) .
 Except some less discharge pumps (below the 2w.w 4.0),generally, internal safety valve will be installed on the pump body, when the discharge pressure is over the rated value, it will have certain protection function. There are two entrance-exit directions ,one is horizontally enter and horizontally exit; the other is horizontally enter and vertically upwards exit; the user can choose according to their own demands.


  ●
MODEL EXPLANATION AND EXAMPLE
2W.W
H 6.1 64 B
Series code Mix-transportation type Spec code Screw pitch Seal code Material code

1、The illustration of the code series
2W.W:horizontal outboard bearing
   2W.N:horizontal inboard bearing
 2、The illustration of the specification code
   Specification code express the size of pump and work capability scope, if the specification code is big, the size will be big and the pressure will be high , the details in the technical characteristics chart.
 3、The illustration of the seal code
   J:General mechanical seal
   B:Metal corrugated pipe mechanical seal
 4、The illustration of the material code
   Ⅰ:Mainly adopting the general engineering constructional steel
   Ⅱ:Mainly adopting the martensitic corrosion resisting steel
   Ⅲ:Mainly adopting the austenite corrosion resisting steel

Material of the main parts

Material kind Parts name
Pump casing
20
0Crl3
0Crl8Ni9
Drving,driven shaft
45
3Crl3
lCrl8Ni9
Screws
38CrMoAl
3Crl3
lCrl8Ni9
Insert
QT600-3
ZGlCrl3
ZG0Crl8Ni9

  If some other material needed, please consult with the manufacturer.

 The main point must be considered when choosing pump.
  
1、Lubricity, degree of cleaning, corrosivity of the medium.
  2、Viscosity, temperature of the medium.
  3、Then medium pressure of the entrance, exit and the installing height.
  4、Explosive-proof demands of the service field
  5、When ordering the product, please note the specification, type design pressure , speed of rotation,nedium viscosity,temperature,motor explosive-proof class,medium name.
 Eg:2W.W5.0-64-J-1,1.0MPa,980r/min,
 Medium viscosity: 500cSt,80℃,EXd2BT4
 Medium:heavy fuel oil
 When choosing, certain excess amount should be left , in order to make it safety and dependable.

  ● 2W.WTYPE TWIN SCREW PUMP TECHNICAL PERFORMANCE CHART

type

Pressure

MPa

1450r/nin
950r/min
720r/min

30cSt

75cSt

150cSt

300cSt

450cSt

750cSt

1500cSt

2500cSt

m3/h

kw

m3/h

kw

m3/h

kw

m3/h

kw

m3/h

kw

m3/h

kw

m3/h

kw

m3/h

kw

2.5-15
0.6
2.4
1.5
3
2.2
3.2
2.2
3.3
2.2
1.8
1.5
1.8
2.2
1.3
2.2
1.3
2.2
1.0
1.7
2.2
2.6
2.2
2.9
3
3.1
3
1.7
2.2
1.7
2.2
1.2
2.2
1.2
2.2
2.5-20
0.4
3.9
1.5
4.3
1.5
4.4
2.2
4.5
2.2
2.6
1.5
2.6
2.2
1.9
2.2
1.9
2.2
0.6
3.4
1.5
4
2.2
4.2
2.2
4.3
2.2
2.5
2.2
2.5
2.2
1.8
1.5
1.8
2.2
2.8-18
0.6
4.3
2.2
4.8
2.2
4.9
3
5
3
2.9
2.2
2.9
3
2.1
3
2.1
3
1.0
3.7
3
4.4
4
4.7
4
4.8
4
2.7
3
2.7
3
2
3
2
4
2.8-24
0.4
6.3
2.2
6.6
2.2
6.7
3
6.8
3
4
2.2
4
3
2.9
2.2
2.9
3
0.6
5.9
2.2
6.4
4
6.5
4
6.6
4
3.8
3
3.8
3
2.7
3
2.7
3
3.1-22
0.6
7.7
3
8.2
4
8.3
4
8.4
4
5
3
5
4
3.7
3
3.7
4
1.0
7
4
7.8
5.5
8
5.5
8.1
5.5
4.8
4
4.8
5.5
3.5
4
3.5
5.5
3.1-30
0.4
11.1
3
11.4
3
11.5
4
11.6
5.5
6.9
3
6.9
4
5.1
3
5.1
4
0.6
10.6
4
11.1
5.5
11.3
5.5
11.4
5.5
6.7
4
6.7
5.5
4.9
4
4.9
5.5
3.2-18
1.6
-
-
4.8
7.5
5.8
7.5
6.3
7.5
2.4
5.5
2.4
5.5
0.9
4.0
0.9
5.5
2.0
-
-
4.2
7.5
5.5
7.5
6.1
11
2.3
7.5
2.3
7.5
0.9
4.0
0.9
5.5
2.5
-
-
3.4
11
5.0
11
5.8
11
2.1
7.5
2.1
7.5
0.8
5.5
0.8
5.5
3.2-24
1.0
5.5
5.5
7.6
7.5
8.4
11
8.7
11
4.6
5.5
4.6
5.5
2.7
5.5
2.7
5.5
1.25
4.6
7.5
7.2
11
8.2
11
8.5
11
4.5
5.5
4.5
7.5
2.6
5.5
2.6
7.5
1.6
3.4
7.5
6.7
11
7.8
11
8.3
11
4.3
7.5
4.3
7.5
2.5
5.5
2.5
7.5
3.2-30
0.6
9.7
5.5
11
5.5
11.5
5.5
11.7
7.5
6.8
5.5
6.8
5.5
4.3
5.5
4.3
5.5
1.0
8.0
7.5
10.2
7.5
10.9
7.5
11.2
7.5
6.5
5.5
6.5
5.5
4.3
5.5
4.3
5.5
3.2-44
0.4
16.4
5.5
17.5
7.5
17.9
7.5
18.1
7.5
11.2
4.0
11.3
5.5
8.0
4.0
8.0
4.0
0.6
15.2
7.5
17
7.5
17.4
7.5
17.6
7.5
10.9
5.5
11
5.5
7.8
5.5
7.8
5.5
3.4-24
1.6
-
-
7.4
11
9
11
9.8
11
5.7
7.5
5.7
7.5
4.3
7.5
4.3
11
2.0
-
-
6.5
11
8.5
11
9.5
15
5.5
11
5.5
11
4.1
7.5
4.1
11
2.5
-
-
5.3
15
7.8
15
9.1
15
5.1
11
5.1
11
3.9
11
3.9
11
3.4-30
1.0
8.3
7.5
11.4
7.5
12.4
11
12.9
11
7.6
7.5
7.6
7.5
5.6
7.5
5.6
7.5
1.25
6.9
11
10.7
11
12.1
11
12.6
11
7.4
7.5
7.4
11
5.5
7.5
5.5
11
1.6
5
11
9.9
11
11.5
11
12.3
15
7.1
11
7.1
11
5.3
7.5
5.3
11
3.4-40
0.6
14.8
5.5
16.8
7.5
17.5
7.5
17.8
11
10.6
7.5
10.6
7.5
7.8
7.5
7.8
7.5
1.0
12.2
11
15.5
11
16.6
11
17.2
11
10
7.5
10
7.5
7.4
7.5
7.4
7.5
3.4-56
0.4
21.8
5.5
23.2
7.5
23.7
7.5
24
11
14.3
5.5
14.4
7.5
10.5
5.5
10.5
7.5
0.6
20.2
7.5
22.5
11
23.1
11
23.4
11
13.8
7.5
13.9
7.5
10.1
7.5
10.1
7.5
4.0-26
1.6
 
 
12.4
15
14.6
15
15.7
18.5
9.3
11
9.3
15
7
11
7
15
2.0
 
 
11.2
15
13.9
18.5
15.3
22
9
15
9
15
6.8
15
6.8
15
2.5
 
 
9.6
18.5
13.1
22
14.8
22
8.6
15
8.6
15
6.6
15
6.6
15
4.0-32
1.0
13.9
11
18.2
15
19.6
15
20.3
15
12.2
11
12.2
15
9.1
11
9.1
11
1.25
12
15
17.3
15
19.1
15
20
18.5
11.9
11
11.9
15
8.9
11
8.9
15
1.6
 
 
16.1
18.5
18.4
18.5
19.5
22
11.5
15
11.5
15
8.6
11
8.6
15
4.0-44
0.6
24.6
11
27.4
11
28.3
11
28.8
15
17.3
11
17.3
11
12.8
11
12.8
11
1.0
21.1
15
25.7
15
27.2
15
27.9
18.5
16.6
11
16.6
15
12.3
11
12.3
15
4.0-64
0.4
37.2
11
39.1
11
39.8
11
40.1
15
24.1
11
24.2
11
17.8
11
17.8
11
0.6
35
11
38
15
38.9
15
39.4
18.5
23.5
11
23.7
11
17.3
11
17.3
11
4.5-30
1.6
17.4
18.5
22.3
22
24
22
24.8
30
14.9
18.5
15
18.5
11.1
18.5
11.2
18.5
2.0
15.1
22
21.3
30
23.4
30
24.4
30
14.5
22
14.6
22
10.9
18.5
11
22
2.5
12.3
30
20
30
22.6
30
23.9
30
14.2
22
14.3
22
10.6
18.5
10.6
22
4.5-40
1.0
29.1
18.5
32.4
18.5
33.5
22
34
22
20.5
18.5
20.6
18.5
15.3
15
15.3
18.5
1.25
27.5
18.5
31.6
22
33
30
33.7
30
20.2
18.5
20.3
22
15
18.5
15.1
22
1.6
25.3
30
30.6
30
32.3
30
33.2
30
19.9
22
20
22
14.7
18.5
14.8
22
4.5-52
0.6
41.8
15
43.9
15
44.6
18.5
45
22
27.3
15
27.4
18.5
20.3
15
20.3
15
1.0
38.9
22
42.4
22
43.6
30
44.2
30
26.6
18.5
26.7
18.5
19.7
15
19.7
18.5
4.5-72
0.4
57.3
15
58.8
15
59.3
18.5
59.6
22
36.1
15
36.2
15
26.9
15
26.9
18.5
0.6
55.5
18.5
57.7
22
58.5
22
58.9
22
35.5
22
35.6
18.5
26.3
18.5
26.3
22
5.0-28
2.5
17.3
37
24.7
37
27.2
37
28.4
45
17.1
30
17.3
37
12.9
30
12.9
37
3.2
 
 
23.1
45
26.3
45
27.9
55
16.7
37
17
45
12.7
37
12.8
37
4.0
 
 
21.3
55
25.3
55
27.3
75
16.2
45
16.5
45
12.4
37
12.6
45
5.0-40
1.6
34.6
37
39.5
45
41.1
45
42
45
25.4
30
25.6
37
19.9
30
20
37
2.0
32.3
37
38.4
45
40.5
45
41.5
45
25.1
37
25.3
37
18.8
37
18.9
37
5.0-40
2.5
29.4
45
37.1
45
39.7
55
41
55
24.7
37
24.9
37
18.5
37
18.6
37
5.0-52
1.0
50.7
30
53.9
30
55
37
55.5
37
33.8
30
34
30
25.3
30
25.4
30
1.25
49.1
30
53.1
37
54.4
37
55.1
45
33.5
30
33.7
37
25
30
25.1
37
1.6
46.9
37
52
45
53.7
45
54.6
55
33.1
37
33.3
37
24.7
30
24.7
37
5.0-64
0.6
66.1
22
68.1
22
68.8
30
39.1
37
42.3
22
42.4
30
31.6
22
31.7
30
1.0
63.2
30
66.6
37
67.7
37
68.2
45
41.5
30
41.7
30
30.9
30
31
30
5.0-96
0.4
96.7
22
98.1
22
98.6
30
98.8
37
60.3
22
60.4
30
45.1
22
45.1
30
0.6
89.7
30
96.9
37
97.7
37
98
45
59.6
30
59.7
30
44.4
30
44.5
30
5.0-30
2.5
26.7
45
34.1
45
36.6
55
37.8
75
22.7
45
23
45
17.1
45
17.3
45
3.2
23
55
32.5
55
35.7
75
37.2
75
22.2
45
22.5
55
16.8
45
17
55
4.0
 
 
30.6
75
34.6
75
36.6
75
21.8
55
22.1
55
16.6
55
16.8
55
5.5-44
1.6
43
45
51.7
45
54.6
55
56
55
33.8
37
34.1
45
25.5
37
25.6
45
2.0
39
55
49.9
55
53.6
55
55.4
75
33.2
45
33.6
55
25
45
25.2
55
2.5
34.1
55
47.8
75
52.3
75
54.6
75
32.7
55
33.3
55
24.7
45
24.8
55
5.5-56
1.0
64.3
37
70
37
71.9
45
72.9
55
44.1
37
44.4
45
33
37
33.2
45
1.25
61.6
45
68.8
45
71.1
55
72.2
75
43.7
37
44
45
32.7
37
32.8
45
1.6
57.9
55
67
55
70
75
71.5
75
43.1
45
43.4
45
32.3
37
32.4
45
5.5-80
0.6
99.7
30
103
37
104
45
105
45
64
30
64.2
37
48
30
48
37
1.0
94.6
45
100
55
102
55
103
75
62.8
45
63.1
45
46.9
37
47
45
5.5-120
0.4
146
30
149
37
150
45
150
55
91.8
30
92
37
68.6
30
68.7
37
0.6
143
45
147
55
148
55
149
55
90.7
37
90.9
45
67.6
37
67.6
45
6.1-36
2.5
40.9
75
51.9
75
55.7
75
57.4
90
33
55
33.4
75
24.9
55
25
75
3.2
35.4
75
49.5
90
54.2
90
56.6
110
32.4
75
32.9
75
24.5
75
24.7
75
4.0
 
 
46.8
110
52.7
110
55.6
110
31.7
75
32.4
90
24
75
24.3
75
6.1-48
1.6
67.6
55
74.8
75
77.3
75
78.5
75
47.5
55
47.8
75
35.7
55
35.8
75
2.0
64.2
75
73.3
75
76.3
75
77.8
90
47
75
47.5
75
35.2
55
35.3
75
2.5
60
75
71.4
90
75.2
90
77.1
110
46.4
75
46.9
75
34.9
55
34.9
75
6.1-64
1.0
99
45
103
55
105
75
106
75
64.5
45
64.7
55
48.4
45
48.5
55
1.25
96.6
55
102
75
104
75
105
90
64.1
55
64.3
75
48
55
48
75
1.6
93.3
75
101
75
103
90
104
90
63.2
75
63.7
75
47.2
55
47.5
75
6.1-96
0.6
155
45
158
55
160
75
160
75
98
45
98
55
73.2
45
73.3
55
1.0
151
75
156
75
158
75
158
90
96.4
55
96.7
75
72
55
72.1
75
6.1-144
0.4
225
45
228
55
228
55
229
75
140
45
140
55
104
45
105
55
0.6
222
75
225
75
227
75
227
90
138
55
138
75
103
55
103
75
6.9-40
2.5
61.3
90
74
90
78.2
110
80.3
110
46.3
75
46.8
90
35
75
35.1
90
3.2
54.9
110
71.2
110
76.6
132
79.3
132
45.6
90
46.2
110
34.5
90
34.7
110
4.0
 
 
68
160
74.8
160
78.2
185
44.8
110
45.6
132
33.9
110
34.2
132
6.9-56
1.6
102
110
110
110
113
132
114
132
69.8
75
70.2
90
52.5
75
52.6
90
2.0
98
132
108
132
112
160
144
160
69
90
69.6
110
51.9
90
52
110
2.5
93
132
106
132
110
160
113
160
68.4
110
68.9
110
51.4
90
51.5
110
6.9-80
1.0
157
110
163
110
165
132
166
132
101
75
101
90
75.9
75
76
90
1.25
154
132
161
132
164
160
165
160
100
90
100
110
75.3
90
75.4
110
1.6
150
160
159
160
162
185
164
185
99.7
110
100
110
74.6
90
74.8
110
6.9-112
0.6
228
90
232
90
233
110
234
110
143
75
143
90
107
75
107
90
1.0
222
132
228
132
231
160
232
160
142
90
142
110
106
90
106
110
6.9-144
0.4
283
75
285
75
286
90
287
90
176
55
176
75
132
55
132
75
0.6
279
110
283
110
284
132
285
132
174
75
174
90
130
75
130
90
7.6-96
0.6
261
110
265
110
267
132
267
132
165
75
165
90
124
75
124
90
1.0
254
160
262
160
264
185
266
185
163
110
163
110
123
90
123
110
7.6-112
0.6
305
110
309
110
311
132
312
32
192
75
192
90
144
75
144
90
0.8
301
160
308
160
310
185
311
185
191
110
191
132
143
110
143
132
7.6-160
0.4
420
110
423
110
424
132
424
132
261
75
261
90
197
75
197
90
0.6
415
160
420
160
422
185
423
185
259
90
259
110
195
90
195
110
7.6-56
1.6
81.8
90
92.9
110
96.7
110
98.5
110
70.2
75
70.3
90
56.4
75
56.4
90
2.0
76.7
110
90.6
132
95.3
132
97.6
132
69.4
90
69.5
110
55.9
90
55.9
110
2.5
70.3
110
87.8
132
93.6
132
96.5
132
68.6
110
69.3
110
55.3
90
55.3
110
7.6-80
1.0
132
90
139
90
141
110
143
110
102
75
102
90
81.7
75
81.7
90
1.25
128
110
137
110
140
132
142
132
101
90
101
110
81.2
90
81.2
110
1.6
123
132
135
132
139
160
141
160
100
110
100
110
80.4
90
80.4
110
7.6-96
0.6
166
75
171
90
172
90
173
90
124
55
124
75
99
55
99
75
1.0
160
110
168
132
170
132
171
132
122
75
122
90
97
75
97
90
7.6-112
0.6
195
90
200
90
201
90
202
90
144
75
144
75
115
75
115
75
0.8
191
110
198
110
200
110
201
110
143
75
143
75
114
75
114
75
7.6-160
0.4
270
75
274
75
275
75
276
75
196
55
196
75
157
55
157
75
0.6
266
110
271
132
273
132
268
132
194
75
194
90
155
75
155
90
8.3-64
1.6
112
132
126
132
131
132
133
132
95.2
110
95.4
110
76.5
90
76.5
90
2.0
106
132
123
160
129
160
132
160
94.3
110
95
132
75.8
110
75.8
110
2.5
98.4
160
120
185
127
185
131
185
93.2
132
94.1
185
75
132
75
185
8.3-96
1.0
189
132
198
132
202
132
203
132
145
110
145
110
134
110
134
110
1.25
185
132
196
160
200
160
202
160
144
110
144
110
115
110
115
110
1.6
178
160
193
185
198
185
200
185
143
132
143
132
114
132
114
132
8.3-120
0.6
248
110
253
110
255
110
256
110
183
75
183
75
146
75
146
75
1.0
239
160
249
160
252
160
254
160
181
110
181
110
144
110
144
110
8.3-144
0.6
298
110
304
132
306
132
307
132
202
90
202
90
175
90
175
90
0.8
293
160
302
160
304
160
306
160
218
110
218
110
174
110
174
110
8.3-192
0.4
385
110
389
110
390
110
391
110
279
75
279
75
222
75
222
75
0.6
378
132
385
132
387
132
388
132
276
110
276
110
220
110
220
110


 

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