Product Description
Model Code Explanation
Product Introduction
The GDL vertical pipeline multistage clean water pump is designed and manufactured with reference to international advanced products. The impellers, guide vanes, and diffuser casings are formed by stainless steel stamping, drawing, and welding. It adopts hard alloy mechanical seals and guide bearings, featuring compact structure, light weight, high efficiency, energy-saving performance, low vibration and noise, stable operation, long service life, vertical installation, small footprint, and elegant appearance. It is an ideal product for upgrading and replacement.
Product Features
1. The GDL vertical pipeline multistage clean water pump adopts a vertical structure, featuring a small footprint. The pump’s center of gravity coincides with the center of the pump base, ensuring smooth operation, low vibration, and long life.
2. The pump inlet and outlet diameters are the same and lie on the same horizontal centerline, eliminating the need to modify the pipeline layout. It can be installed directly at any section of the pipeline, making installation extremely convenient.
3. With a rainproof cover on the motor, the pump can be used outdoors without constructing a pump room, greatly reducing infrastructure investment.
4. The pump head can be adjusted by changing the number of stages (number of impellers), providing a wide application range.
5. The shaft seal adopts a hard alloy mechanical seal, ensuring reliable sealing, no leakage, and minimal mechanical loss.
6. High efficiency, energy saving, and attractive appearance.
7. For diameters above 50 mm, internal components are cast-formed.
Product Applications
The GDL vertical pipeline multistage clean water pump is especially suitable for boiler feed water. It is also widely used for pressure vessel water supply, hot water circulation, high-rise building water supply, agricultural irrigation, fire boosting, hydraulic washing, food industry, brewing, pharmaceuticals, chemicals, aquaculture, environmental protection, chemical processes, and machine tool cooling systems, serving as a power device for water supply and drainage across industries.
Operating Conditions
1. Suitable for conveying clean water or liquids with physical and chemical properties similar to clean water.
2. The liquid should contain no solid particles, no fibers, no strong corrosive or explosive components.
3. Maximum liquid temperature: 120°C.
4. Maximum working pressure: 2.5 MPa.
5. Power supply: 3-phase 380V, 50 Hz. Voltage fluctuation within ±5%.
6. Ambient temperature should be below 40°C, and relative humidity below 95%.
Structure Diagram
|
No.
|
Name
|
No.
|
Name
|
|
1
|
Pump Body
|
11
|
Coupling
|
|
2
|
Tightening Bolt
|
12
|
Connecting Seat
|
|
3
|
Outer Casing
|
13
|
Air Vent
|
|
4
|
Impeller
|
14
|
Mechanical Seal
|
|
5
|
Impeller Sleeve
|
15
|
Shaft
|
|
6
|
Shaft Sleeve
|
16
|
Intermediate Section
|
|
7
|
Gasket
|
17
|
Shaft Sleeve Nut
|
|
8
|
Nut
|
18
|
Bearing Bush
|
|
9
|
Key
|
19
|
Return Pipe Assembly
|
|
10
|
Motor
|
Performance Curve Chart
Performance Parameters
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
25GDL2-12
|
3
|
2
|
36
|
2900
|
1.1
|
30
|
2.9
|
58
|
|
25GDL2-12
|
4
|
2
|
48
|
2900
|
1.1
|
30
|
2.9
|
62
|
|
25GDL2-12
|
5
|
2
|
60
|
2900
|
2
|
30
|
2.9
|
68
|
|
25GDL2-12
|
6
|
2
|
72
|
2900
|
2
|
30
|
2.9
|
72
|
|
25GDL2-12
|
7
|
2
|
84
|
2900
|
2
|
30
|
2.9
|
78
|
|
25GDL2-12
|
8
|
2
|
96
|
2900
|
2.2
|
30
|
2.9
|
82
|
|
25GDL2-12
|
9
|
2
|
108
|
2900
|
2
|
30
|
2.9
|
86
|
|
25GDL2-12
|
10
|
2
|
120
|
2900
|
3
|
30
|
2.9
|
98
|
|
25GDL2-12
|
11
|
2
|
132
|
2900
|
3
|
30
|
2.9
|
102
|
|
25GDL2-12
|
12
|
2
|
144
|
2900
|
3
|
30
|
2.9
|
|
|
25GDL2-12
|
13
|
2
|
156
|
2900
|
4
|
30
|
2.9
|
|
|
25GDL2-12
|
14
|
2
|
168
|
2900
|
4
|
30
|
2.9
|
|
|
25GDL2-12
|
15
|
2
|
180
|
2900
|
4
|
30
|
2.9
|
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
25GDL4-11
|
3
|
4
|
33
|
2900
|
1.1
|
42
|
2.9
|
58
|
|
25GDL4-11
|
4
|
4
|
44
|
2900
|
1.5
|
42
|
2.9
|
65
|
|
25GDL4-11
|
5
|
4
|
55
|
2900
|
2.2
|
42
|
2.9
|
72
|
|
25GDL4-11
|
6
|
4
|
66
|
2900
|
2.2
|
42
|
2.9
|
76
|
|
25GDL4-11
|
7
|
4
|
77
|
2900
|
3
|
42
|
2.9
|
86
|
|
25GDL4-11
|
8
|
4
|
88
|
2900
|
3
|
42
|
2.9
|
90
|
|
25GDL4-11
|
9
|
4
|
99
|
2900
|
3
|
42
|
2.9
|
94
|
|
25GDL4-11
|
10
|
4
|
110
|
2900
|
4
|
42
|
2.9
|
110
|
|
25GDL4-11
|
11
|
4
|
121
|
2900
|
4
|
42
|
2.9
|
114
|
|
25GDL4-11
|
12
|
4
|
132
|
2900
|
4
|
42
|
2.9
|
|
|
25GDL4-11
|
13
|
4
|
143
|
2900
|
4
|
42
|
2.9
|
|
|
25GDL4-11
|
14
|
4
|
154
|
2900
|
5.5
|
42
|
2.9
|
|
|
25GDL4-11
|
15
|
4
|
165
|
2900
|
5.5
|
42
|
2.9
|
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
40GDL6-12
|
3
|
6
|
36
|
2900
|
1.5
|
52
|
2.9
|
72
|
|
40GDL6-12
|
4
|
6
|
48
|
2900
|
2.2
|
52
|
2.9
|
78
|
|
40GDL6-12
|
5
|
6
|
60
|
2900
|
2.2
|
52
|
2.9
|
82
|
|
40GDL6-12
|
6
|
6
|
72
|
2900
|
3
|
52
|
2.9
|
92
|
|
40GDL6-12
|
7
|
6
|
84
|
2900
|
3
|
52
|
2.9
|
96
|
|
40GDL6-12
|
8
|
6
|
96
|
2900
|
4
|
52
|
2.9
|
112
|
|
40GDL6-12
|
9
|
6
|
108
|
2900
|
4
|
52
|
2.9
|
116
|
|
40GDL6-12
|
10
|
6
|
120
|
2900
|
4
|
52
|
2.9
|
120
|
|
40GDL6-12
|
11
|
6
|
132
|
2900
|
5.5
|
52
|
2.9
|
140
|
|
40GDL6-12
|
12
|
6
|
144
|
2900
|
5.5
|
52
|
2.9
|
|
|
40GDL6-12
|
13
|
6
|
156
|
2900
|
7.5
|
52
|
2.9
|
|
|
40GDL6-12
|
14
|
6
|
168
|
2900
|
7.5
|
52
|
2.9
|
|
|
40GDL6-12
|
15
|
6
|
180
|
2900
|
7.5
|
52
|
2.9
|
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
50GDL12-15
|
2
|
12
|
30
|
2900
|
2.2
|
57
|
3.5
|
113
|
|
50GDL12-15
|
3
|
12
|
45
|
2900
|
3
|
57
|
3.5
|
129
|
|
50GDL12-15
|
4
|
12
|
60
|
2900
|
4
|
57
|
3.5
|
149
|
|
50GDL12-15
|
5
|
12
|
75
|
2900
|
5.5
|
57
|
3.5
|
181
|
|
50GDL12-15
|
6
|
12
|
90
|
2900
|
5.5
|
57
|
3.5
|
190
|
|
50GDL12-15
|
7
|
12
|
105
|
2900
|
7.5
|
57
|
3.5
|
204
|
|
50GDL12-15
|
8
|
12
|
120
|
2900
|
7.5
|
57
|
3.5
|
212
|
|
50GDL12-15
|
9
|
12
|
135
|
2900
|
11
|
57
|
3.5
|
265
|
|
50GDL12-15
|
10
|
12
|
150
|
2900
|
11
|
57
|
3.5
|
273
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
50GDL18-15
|
2
|
18
|
30
|
2900
|
3
|
63
|
4.0
|
122
|
|
50GDL18-15
|
3
|
18
|
45
|
2900
|
4
|
63
|
4.0
|
142
|
|
50GDL18-15
|
4
|
18
|
60
|
2900
|
5.5
|
63
|
4.0
|
175
|
|
50GDL18-15
|
5
|
18
|
75
|
2900
|
7.5
|
63
|
4.0
|
189
|
|
50GDL18-15
|
6
|
18
|
90
|
2900
|
7.5
|
63
|
4.0
|
198
|
|
50GDL18-15
|
7
|
18
|
105
|
2900
|
11
|
63
|
4.0
|
252
|
|
50GDL18-15
|
8
|
18
|
120
|
2900
|
11
|
63
|
4.0
|
261
|
|
50GDL18-15
|
9
|
18
|
135
|
2900
|
15
|
63
|
4.0
|
280
|
|
50GDL18-15
|
10
|
18
|
150
|
2900
|
15
|
63
|
4.0
|
289
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
65GDL24-12
|
2
|
24
|
24
|
2900
|
3
|
63
|
4.0
|
122
|
|
65GDL24-12
|
3
|
24
|
36
|
2900
|
4
|
63
|
4.0
|
142
|
|
65GDL24-12
|
4
|
24
|
48
|
2900
|
5.5
|
63
|
4.0
|
175
|
|
65GDL24-12
|
5
|
24
|
60
|
2900
|
7.5
|
63
|
4.0
|
189
|
|
65GDL24-12
|
6
|
24
|
72
|
2900
|
7.5
|
63
|
4.0
|
252
|
|
65GDL24-12
|
7
|
24
|
84
|
2900
|
11
|
63
|
4.0
|
261
|
|
65GDL24-12
|
8
|
24
|
96
|
2900
|
11
|
63
|
4.0
|
280
|
|
65GDL24-12
|
9
|
24
|
108
|
2900
|
15
|
63
|
4.0
|
289
|
|
65GDL24-12
|
10
|
24
|
120
|
2900
|
15
|
63
|
4.0
|
298
|
|
65GDL24-12
|
11
|
24
|
132
|
2900
|
15
|
63
|
4.0
|
317
|
|
65GDL24-12
|
12
|
24
|
144
|
2900
|
18.5
|
63
|
4.0
|
346
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
80GDL36-12
|
2
|
36
|
24
|
2900
|
4
|
71
|
4.2
|
193
|
|
80GDL36-12
|
3
|
36
|
36
|
2900
|
5.5
|
71
|
4.2
|
227
|
|
80GDL36-12
|
4
|
36
|
48
|
2900
|
7.5
|
71
|
4.2
|
244
|
|
80GDL36-12
|
5
|
36
|
60
|
2900
|
11
|
71
|
4.2
|
292
|
|
80GDL36-12
|
6
|
36
|
72
|
2900
|
11
|
71
|
4.2
|
302
|
|
80GDL36-12
|
7
|
36
|
84
|
2900
|
15
|
71
|
4.2
|
322
|
|
80GDL36-12
|
8
|
36
|
96
|
2900
|
15
|
71
|
4.2
|
332
|
|
80GDL36-12
|
9
|
36
|
108
|
2900
|
18.5
|
71
|
4.2
|
365
|
|
80GDL36-12
|
10
|
36
|
120
|
2900
|
18.5
|
71
|
4.2
|
375
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
80GDL54-14
|
2
|
54
|
28
|
2900
|
7.5
|
73
|
4.0
|
218
|
|
80GDL54-14
|
3
|
54
|
42
|
2900
|
11
|
73
|
4.0
|
267
|
|
80GDL54-14
|
4
|
54
|
56
|
2900
|
15
|
73
|
4.0
|
287
|
|
80GDL54-14
|
5
|
54
|
70
|
2900
|
18.5
|
73
|
4.0
|
320
|
|
80GDL54-14
|
6
|
54
|
84
|
2900
|
18.5
|
73
|
4.0
|
330
|
|
80GDL54-14
|
7
|
54
|
98
|
2900
|
22
|
73
|
4.0
|
373
|
|
80GDL54-14
|
8
|
54
|
112
|
2900
|
30
|
73
|
4.0
|
400
|
|
80GDL54-14
|
9
|
54
|
126
|
2900
|
30
|
73
|
4.0
|
421
|
|
80GDL54-14
|
10
|
54
|
140
|
2900
|
37
|
73
|
4.0
|
432
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
100GDL72-14
|
2
|
72
|
28
|
2900
|
11
|
73
|
4.5
|
276
|
|
100GDL72-14
|
3
|
72
|
42
|
2900
|
15
|
73
|
4.5
|
298
|
|
100GDL72-14
|
4
|
72
|
56
|
2900
|
18.5
|
73
|
4.5
|
336
|
|
100GDL72-14
|
5
|
72
|
70
|
2900
|
22
|
73
|
4.5
|
381
|
|
100GDL72-14
|
6
|
72
|
84
|
2900
|
30
|
73
|
4.5
|
453
|
|
100GDL72-14
|
7
|
72
|
98
|
2900
|
30
|
73
|
4.5
|
466
|
|
100GDL72-14
|
8
|
72
|
112
|
2900
|
37
|
73
|
4.5
|
493
|
|
100GDL72-14
|
9
|
72
|
126
|
2900
|
37
|
73
|
4.5
|
582
|
|
100GDL72-14
|
10
|
72
|
140
|
2900
|
45
|
73
|
4.5
|
595
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
100GDL100-20
|
2
|
108
|
40
|
2900
|
18.5
|
74
|
4.5
|
292
|
|
100GDL100-20
|
3
|
108
|
60
|
2900
|
30
|
74
|
4.5
|
430
|
|
100GDL100-20
|
4
|
108
|
80
|
2900
|
37
|
74
|
4.5
|
463
|
|
100GDL100-20
|
5
|
108
|
100
|
2900
|
45
|
74
|
4.5
|
555
|
|
100GDL100-20
|
6
|
108
|
120
|
2900
|
55
|
74
|
4.5
|
640
|
|
100GDL100-20
|
7
|
108
|
140
|
2900
|
75
|
74
|
4.5
|
840
|
|
100GDL100-20
|
8
|
108
|
160
|
2900
|
75
|
74
|
4.5
|
855
|
|
100GDL100-20
|
9
|
108
|
180
|
2900
|
90
|
74
|
4.5
|
870
|
|
100GDL100-20
|
10
|
108
|
200
|
2900
|
90
|
74
|
4.5
|
955
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
125GDL100-20
|
2
|
108
|
40
|
2900
|
18.5
|
74
|
4.5
|
292
|
|
125GDL100-20
|
3
|
108
|
60
|
2900
|
30
|
74
|
4.5
|
430
|
|
125GDL100-20
|
4
|
108
|
80
|
2900
|
37
|
74
|
4.5
|
463
|
|
125GDL100-20
|
5
|
108
|
100
|
2900
|
45
|
74
|
4.5
|
555
|
|
125GDL100-20
|
6
|
108
|
120
|
2900
|
55
|
74
|
4.5
|
640
|
|
125GDL100-20
|
7
|
108
|
140
|
2900
|
75
|
74
|
4.5
|
840
|
|
125GDL100-20
|
8
|
108
|
160
|
2900
|
75
|
74
|
4.5
|
855
|
|
125GDL100-20
|
9
|
108
|
180
|
2900
|
90
|
74
|
4.5
|
870
|
|
125GDL100-20
|
10
|
108
|
200
|
2900
|
90
|
74
|
4.5
|
955
|
|
Model
|
Stages
|
Flow Rate
|
Head
|
Speed
|
Motor Power
|
Efficiency
|
NPSH (Required)
|
Weight
|
|
m³/h
|
m
|
r/min
|
kW
|
%
|
NPSH
|
kg
|
||
|
150GDL160-20
|
2
|
160
|
40
|
2900
|
30
|
78
|
4.5
|
422
|
|
150GDL160-20
|
3
|
160
|
60
|
2900
|
37
|
78
|
4.5
|
452
|
|
150GDL160-20
|
4
|
160
|
80
|
2900
|
55
|
78
|
4.5
|
613
|
|
150GDL160-20
|
5
|
160
|
100
|
2900
|
75
|
78
|
4.5
|
820
|
|
150GDL160-20
|
6
|
160
|
120
|
2900
|
75
|
78
|
4.5
|
836
|
|
150GDL160-20
|
7
|
160
|
140
|
2900
|
90
|
78
|
4.5
|
922
|
Installation Dimensions
|
Model
|
H1
|
L
|
B
|
4-φd1
|
Inlet Flange (J)
|
||
|
DN
|
N-φD2
|
φD
|
|||||
|
25GDL
|
60
|
300
|
200
|
4-φ18
|
25
|
4-φ14
|
85
|
|
40GDL
|
80
|
360
|
235
|
4-φ18
|
40
|
4-φ18
|
110
|
|
50GDL
|
100
|
360
|
235
|
4-φ18
|
50
|
4-φ18
|
125
|
|
65GDL
|
110
|
360
|
235
|
4-φ18
|
65
|
4-φ18
|
145
|
|
80GDL
|
130
|
420
|
300
|
4-φ18
|
80
|
8-φ18
|
160
|
|
100GDL
|
160
|
520
|
350
|
4-φ18
|
100
|
8-φ18
|
180
|
|
125GDL
|
160
|
500
|
400
|
4-φ18
|
125
|
8-φ18
|
210
|
|
150GDL
|
180
|
600
|
400
|
4-φ18
|
150
|
8-φ22
|
245
|
Installation Instructions
1. The pipeline system must not impose any weight on the pump; otherwise, the pump may be damaged.
2. The pump and motor are an integrated structure and have been aligned by the manufacturer before delivery. Therefore, no adjustment is required during installation, making the process very convenient.
3. Before installation, carefully check whether there are any hard objects inside the flow passage (such as stones, metal particles, etc.) to avoid damaging hydraulic components during operation.
4. The foundation bolts must be tightened during installation. After installation, inspect the pump periodically to prevent bolt loosening, which may cause severe vibration at startup and affect performance.
5. For easier maintenance and safe operation, install a regulating valve and a pressure gauge on both the inlet and outlet pipelines. For high-head applications, install a check valve in front of the discharge gate valve to prevent water hammer and ensure safe operation during sudden power outages.
6. When the pump is used under suction conditions, a foot valve must be installed. The inlet pipeline must not have excessive bends and must be free from air or water leakage to avoid affecting suction performance.
7. To prevent impurities from entering the pump and clogging the flow passage, a strainer should be installed in front of the pump inlet.
8. Before installing the pipeline, rotate the pump rotor by hand. There should be no rubbing or jamming. If abnormal resistance occurs, disassemble the pump to identify the cause.
Preparation Work
Preparation Before Start-Up
1. Rotate the coupling by hand; the impeller should rotate freely without friction.
2. Open the inlet valve and the exhaust valve to fill the pump chamber completely with liquid, then close the exhaust valve.
3. When pumping hot liquid, preheat the pump before startup. The temperature rise rate should not exceed 50°C/h. Preheating is achieved by circulating the pumped liquid so that the pump heats evenly.
4. Manually rotate the pump several turns to allow lubricating water to reach the mechanical seal faces.
5. Jog the motor to check whether the rotation direction is correct.
Start-Up and Operation
1. Fully open the inlet valve and close the discharge valve.
2. Power on the motor. When the GDL multistage booster pump reaches normal speed, gradually open the discharge valve and adjust to the required working condition.
3. Observe instrument readings and check seal leakage. Normal mechanical seal leakage is about 3 drops/min. Check the temperature of the motor and bearings (≤70°C). Stop the pump immediately if any abnormal condition is found.
Shutdown
1. Gradually close the discharge valve.
2. Close the inlet valve.
3. If ambient temperature is below 0°C, drain the liquid inside the pump to prevent freezing damage.
4. For long-term shutdown, disassemble, clean and properly store the pump.
Maintenance & Service
Maintenance During Operation
1. The inlet pipeline must be well sealed and free from water or air leakage.
2. The pump must not operate under cavitation conditions for extended periods.
3. The pump must not run continuously at excessive flow where the motor may overload.
4. Regularly check the motor current and ensure the pump operates within its design range.
5. The pump should be monitored by a dedicated operator during operation.
6. Lubricate the bearings every 500 operating hours.
7. After long-term continuous operation, mechanical wear may increase noise and vibration. Stop the pump for inspection; replace worn parts and bearings if necessary. Major maintenance is generally recommended once per year.
Mechanical Seal Maintenance
1. The mechanical seal flushing liquid must be clean and free of solid particles.
2. Dry running of the mechanical seal is strictly prohibited.
3. Before start-up, rotate the pump (or motor) several turns to avoid sudden start-up damage to the mechanical seal.
OEM & Custom Solutions
We offer OEM/ODM customization, including stainless steel materials, special voltages (220V/415V/460V), explosion-proof motors, and control panel integration. Optional flange standards (DIN/ANSI/JIS) and private labeling are supported. All products comply with ISO9001 and CE certification for export to global markets.
FAQs for Oversea Buyers
Q: What’s the main application of GDL pumps?
A: They are used in building water supply, HVAC, boiler feed, and clean water circulation systems.
Q: What temperature range can it handle?
A: Standard type ≤120°C, suitable for hot and cold clean water.
Q: What material options are available?
A: Standard stainless steel 304; optional 316L or cast iron versions are available.
Q: Can it operate under continuous duty?
A: Yes, it is designed for 24-hour operation with low noise and high reliability.
Q: What is the maximum system pressure?
A: Up to 2.0 MPa, depending on model configuration.
Q: How often should maintenance be done?
A: Bearings should be lubricated every 500 hours; mechanical seals inspected every 3–6 months.
Q: Which markets use this pump?
A: The GDL series is widely exported to Southeast Asia, the Middle East, and Africa for HVAC, water supply, and industrial use.