4SDM20 Large Flow High Efficiency Submersible Deep Well Water Pump
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The 4SDM20 Series Submersible Deep Well Water Pump is a high-performance solution designed for large flow applications in deep well environments. Engineered for reliability and efficiency, this pump is ideal for a variety of uses, including water supply from wells or reservoirs, domestic use, civil and industrial applications, and garden irrigation.
1. Electric motor with rewind capability
2. Single-phase: 220-240V/50Hz or Three-phase: 380-415V/50Hz compatibility
3. Equipped with a control box for manual start or digital automatic control
4. Pumps are designed with consideration for casing stress factors
5. Complies with NEMA dimensional standards
6. Curve tolerances adhere to ISO 9903 guidelines for accuracy.
Special mechanical seal
Single phase motor with built-in capacitor

|
Components |
Material |
|
Pump external casing |
AISI 304 SS |
|
Delivery casing |
①Cast-Cu ASTM C85500②AISI 304 SS |
|
Suction lantern |
①Cast-Cu ASTM C85500②AISI 304 SS |
|
Diffuser |
Plastic.PC |
|
Impeller |
Plastic.POM |
|
Shaft |
AISI 304 SS |
|
Shaft coupling |
AISI 304 SS |
|
Wear ring |
AISI 304 SS |
|
Motor external casing |
AISI 304 SS |
|
Top chock |
①Cast-Cu ASTM C85500②AISI 420 SS |
|
③Cast-iron ASTM NO.30 |
|
|
Bottom support |
AISI 304 SS |
|
Mechanical seal |
Special seal for deep well(Graphite-Ceramic/TC) |
|
Shaft |
AISI 304 SS-ASTM 5140 |
|
Seal lubricant oil |
Oil for food machinery and pharmaceutic use. |

|
Model |
Power |
Deliver |
||||||||||||
|
1~220-240V |
3~380-415V |
KW |
HP |
Q(m³/h) |
0 |
3 |
6 |
9 |
12 |
15 |
18 |
21 |
24 |
27 |
|
Q(l/min) |
0 |
50 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
||||
|
4SDM20/3 |
4SDM20/3 |
0.92 |
1.25 |
H(m) |
19 |
18 |
17 |
15 |
13 |
12 |
10 |
7 |
7 |
4 |
|
4SDM20/4 |
4SDM20/4 |
1.1 |
1.5 |
25 |
24 |
23 |
20 |
18 |
16 |
12 |
9 |
9 |
5 |
|
|
4SDM20/5 |
4SDM20/5 |
1.3 |
1.75 |
31 |
40 |
29 |
25 |
22 |
20 |
15 |
11 |
11 |
6 |
|
|
4SDM20/6 |
4SDM20/6 |
1.5 |
2 |
38 |
37 |
35 |
31 |
27 |
24 |
18 |
13 |
13 |
8 |
|
|
4SDM20/7 |
4SDM20/7 |
1.8 |
2.5 |
44 |
44 |
40 |
36 |
31 |
28 |
21 |
15 |
15 |
3 |
|
|
4SDM20/8 |
4SDM20/8 |
2.2 |
3 |
50 |
49 |
46 |
41 |
35 |
32 |
23 |
17 |
17 |
10 |
|
|
4SDM20/9 |
4SDM20/9 |
2.6 |
3.5 |
56 |
55 |
52 |
46 |
40 |
36 |
26 |
20 |
20 |
12 |
|
|
4SDM20/11 |
4SDM20/11 |
3 |
4 |
69 |
67 |
63 |
46 |
49 |
44 |
32 |
24 |
24 |
14 |
|
|
- |
4SDM20/13 |
3.7 |
5 |
81 |
79 |
75 |
66 |
57 |
52 |
38 |
28 |
28 |
17 |
|
|
- |
4SDM20/15 |
4 |
5.5 |
94 |
91 |
86 |
76 |
66 |
60 |
44 |
33 |
33 |
19 |
|
|
- |
4SDM20/18 |
5.5 |
7.5 |
113 |
110 |
104 |
92 |
80 |
72 |
53 |
39 |
39 |
23 |
|
|
- |
4SDM20/21 |
7.5 |
10 |
131 |
128 |
121 |
107 |
93 |
84 |
62 |
46 |
46 |
27 |
|
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