G Series Progressive Cavity Pump (Single Screw Pump)
Inlet & Outlet Size: DN25–DN250
Flow Range: 0.15–150 m³/h
Pressure: 0.6–2.4 MPa
Motor Power: 0.75–55 kW
Speed: 10 r/min–960 r/min
Particle Size: 1.5–20 mm
Fiber Length: 25–150 mm
Voltage: 220V / 380V / 415V / 440V / 460V
What is G Series Progressive Cavity Pumps (Single Screw Pump)？
G series progressive cavity pump (single screw pump) is a versatile positive displacement pump that perfectly combines smooth flow with powerful adaptability. The pump features excellent suction lift and minimal pressure pulsation, allowing it to easily transfer standard flowable liquids, as well as efficiently handle high-viscosity, abrasive, or fiber-laden challenging media. Thanks to its high efficiency and reliability, it has become an ideal fluid-handling solution across a wide range of industrial fields.
Key Features:
Versatile Media Handling: Easily pumps high-viscosity fluids, sludges, pastes, and media with hard solids or fibers.
Smooth & Stable Transfer: Ensures excellent suction lift, stable continuous flow, and low pressure pulsation.
Cost-Effective: Industrial-grade performance with highly affordable pricing and simple maintenance, perfect for budget-conscious buyers.
Wide Applications: Wastewater treatment, Petroleum, Chemicals, Food & beverage, Brewing, Papermaking, Mining, Textiles, and Power plants.
Operating Principle
The progressive cavity pump (single screw pump) is a reliable positive displacement pump. Its core components are an eccentric screw (rotor) and a fixed rubber sleeve (stator). As the rotor turns, the media is continuously and smoothly transferred from the suction inlet to the discharge outlet.
Thanks to these features, the pump is ideal for the following applications:
-
Pumping high-viscosity media.
-
Handling fluids containing solid particles or fibers.
-
Requirements for continuous flow and stable pressure without pulsations.
-
Low-shear transfer that protects the structure of sensitive media.
-
Low noise operation.
Applications
As a versatile pump, the flow rate can be easily adjusted by changing the operation speed. The discharge pressure increases with the number of pump stages (0.6 MPa per stage). It is widely used in the following fields:
-
Environmental Protection: Industrial and domestic sewage, sludge water with solids or short fibers; ideal for oil-water separators and plate-and-frame filter presses.
-
Shipping & Marine: Bilge cleaning; transfer of oily water, oil sludge, and petroleum waste.
-
Petroleum Industry: Crude oil, oil-water mixtures, coalbed gas-water mixtures, and polymer injection.
-
Pharmaceuticals & Cosmetics: Various thick pastes, emulsions, and creams.
-
Food & Canning: Thick starch, cooking oil, honey, syrups, fruit pulp, cream, minced fish, and food processing waste.
-
Brewing & Distilling: Fermented mash, distillers' grains, grain residues, thick sauces, and viscous liquids with solid chunks.
-
Construction: Spraying and transferring cement mortar, lime slurry, coatings, and other pastes.
-
Mining: Pumping underground water and muddy water with solid particles from mines to the surface.
-
Chemical Industry: Various suspensions, greases, colloidal slurries, and adhesives.
-
Printing & Papermaking: High-viscosity inks, PVC paste for wallpaper, and various paper pulps or short-fiber slurries.
-
Boilers & Power Plants: Coal-water slurry (CWM) transfer.
Table 1: Performance Parameters at Fixed Speed
|
Model |
Flow Rate (m³/h) |
Pressure (MPa) |
Max. Allowable Speed (rpm) |
Motor Power (kW) |
NPSHr (m) |
Inlet Flange Dia. (mm) |
Outlet Flange Dia. (mm) |
Max. Particle Dia. (mm) |
Max. Fiber Length (mm) |
|
G20-1 |
0.8 |
0.6 |
960 |
0.75 |
4 |
25 |
25 |
1.5 |
25 |
|
G20-2 |
0.8 |
1.2 |
960 |
1.1 |
4 |
25 |
25 |
1.5 |
25 |
|
G25-1 |
2 |
0.6 |
960 |
1.5 |
4 |
32 |
25 |
2 |
30 |
|
G25-2 |
2 |
1.2 |
960 |
2.2 |
4 |
32 |
25 |
2 |
30 |
|
G30-1 |
5 |
0.6 |
960 |
2.2 |
4 |
50 |
40 |
2.5 |
35 |
|
G30-2 |
5 |
1.2 |
960 |
3 |
4 |
50 |
40 |
2.5 |
35 |
|
G35-1 |
8 |
0.6 |
960 |
3 |
4 |
65 |
50 |
3 |
40 |
|
G35-2 |
8 |
1.2 |
960 |
4 |
4 |
65 |
50 |
3 |
40 |
|
G40-1 |
12 |
0.6 |
960 |
4 |
4 |
80 |
65 |
3.8 |
45 |
|
G40-2 |
12 |
1.2 |
960 |
5.5 |
4 |
80 |
65 |
3.8 |
45 |
|
G50-1 |
20 |
0.6 |
960 |
5.5 |
4.5 |
100 |
80 |
5 |
50 |
|
G50-2 |
20 |
1.2 |
960 |
7.5 |
4.5 |
100 |
80 |
5 |
50 |
|
G60-1 |
30 |
0.6 |
960 |
11 |
5 |
125 |
100 |
6 |
60 |
|
G60-2 |
30 |
1.2 |
960 |
15 |
5 |
125 |
100 |
6 |
60 |
|
G70-1 |
38 |
0.6 |
720 |
11 |
5 |
150 |
125 |
8 |
70 |
|
G70-2 |
38 |
1.2 |
720 |
15 |
5 |
150 |
125 |
8 |
70 |
|
G85-1 |
60 |
0.6 |
720 |
18.5 |
5 |
150 |
150 |
10 |
80 |
|
G85-2 |
50 |
1.2 |
600 |
22 |
5 |
150 |
150 |
10 |
80 |
|
G105-1 |
80 |
0.6 |
380 |
22 |
5 |
200 |
200 |
15 |
110 |
|
G105-2 |
80 |
1.2 |
380 |
37 |
5 |
200 |
200 |
15 |
110 |
|
G135-1 |
150 |
0.6 |
380 |
37 |
5 |
250 |
250 |
20 |
150 |
|
G135-2 |
150 |
1.2 |
380 |
55 |
5 |
250 |
250 |
20 |
150 |
Table2: Single-Stage Screw Pump with Variable Speed Gearbox / Motor Drive
|
Model |
Gear Reducer Drive (0.6MPa Working Pressure) |
Variable Speed Motor Drive (Adjustable) |
|||||||
|
Speed (rpm) |
Flow Rate (m³/h) |
Motor Spec. (kW) |
Speed (rpm) |
Flow Rate (m³/h) |
Motor Spec. (kW) |
Speed (rpm) |
Flow Rate (m³/h) |
Motor Power (kW) |
|
|
G20-1 |
960 |
0.8 |
0.75-6P |
480 |
0.4 |
0.55-4P / Gearbox |
200~1000 |
0.16~0.8 |
0.75 |
|
720 |
0.8 |
0.75-8P |
320 |
0.27 |
0.55-4P / Gearbox |
||||
|
640 |
0.54 |
0.75-4P / Gearbox |
200 |
0.16 |
0.55-4P / Gearbox |
||||
|
G25-1 |
960 |
2 |
1.5-6P |
480 |
1 |
1.1-4P / Gearbox |
200~1000 |
0.41~2 |
1.5 |
|
720 |
1.5 |
1.5-8P |
320 |
0.66 |
0.75-4P / Gearbox |
||||
|
640 |
1.3 |
1.5-4P / Gearbox |
200 |
0.41 |
0.75-4P / Gearbox |
||||
|
G30-1 |
960 |
5 |
2.2-6P |
480 |
2.5 |
1.5-4P / Gearbox |
200~1000 |
1.04~5 |
2.2 |
|
720 |
3.74 |
2.2-8P |
320 |
1.66 |
1.1-4P / Gearbox |
||||
|
640 |
3.33 |
2.2-4P / Gearbox |
200 |
1.04 |
1.1-4P / Gearbox |
||||
|
G35-1 |
960 |
8 |
3-6P |
480 |
4 |
2.2-4P / Gearbox |
200~1000 |
1.66~8 |
3 |
|
720 |
6 |
3-8P |
320 |
2.66 |
1.5-4P / Gearbox |
||||
|
640 |
5.33 |
3-4P / Gearbox |
200 |
1.66 |
1.5-4P / Gearbox |
||||
|
G40-1 |
960 |
12 |
4-6P |
480 |
6 |
3-4P / Gearbox |
200~1000 |
2.5~12 |
4 |
|
720 |
9 |
4-8P |
320 |
4 |
2.2-4P / Gearbox |
||||
|
640 |
8 |
4-4P / Gearbox |
200 |
2.5 |
2.2-4P / Gearbox |
||||
|
G50-1 |
960 |
20 |
5.5-6P |
480 |
10 |
4-4P / Gearbox |
200~1000 |
4.16~20 |
5.5 |
|
720 |
15 |
5.5-8P |
320 |
6.66 |
3-4P / Gearbox |
||||
|
640 |
13.3 |
5.5-4P / Gearbox |
200 |
4.16 |
3-4P / Gearbox |
||||
|
G60-1 |
960 |
30 |
11-6P |
480 |
15 |
7.5-4P / Gearbox |
200~1000 |
6.25~30 |
11 |
|
720 |
22.5 |
11-8P |
320 |
10 |
5.5-4P / Gearbox |
||||
|
640 |
20 |
11-4P / Gearbox |
200 |
6.25 |
5.5-4P / Gearbox |
||||
|
G70-1 |
720 |
38 |
11-8P |
400 |
21.11 |
11-4P / Gearbox |
200~720 |
12.5~38 |
11 |
|
600 |
31.2 |
11-4P / Gearbox |
300 |
15.83 |
7.5-4P / Gearbox |
||||
|
500 |
26.38 |
11-4P / Gearbox |
200 |
10.55 |
7.5-4P / Gearbox |
||||
|
G85-1 |
720 |
60 |
18.5-8P |
400 |
33.33 |
15-4P / Gearbox |
200~720 |
16.66~60 |
18.5 |
|
600 |
50 |
18.5-4P / Gearbox |
300 |
25 |
11-4P / Gearbox |
||||
|
500 |
41.66 |
15-4P / Gearbox |
200 |
16.66 |
11-4P / Gearbox |
||||
|
G105-1 |
380 |
80 |
22-4P / Gearbox |
200 |
42.1 |
18.5-4P / Gearbox |
32~90 |
3~50 |
22 |
|
320 |
67.36 |
22-4P / Gearbox |
160 |
33.68 |
18.5-4P / Gearbox |
||||
|
260 |
54.73 |
22-4P / Gearbox |
100 |
21.05 |
15-4P / Gearbox |
||||
|
G135-1 |
380 |
120 |
37-4P / Gearbox |
200 |
63.15 |
30-4P / Gearbox |
18~180 |
3~56 |
45 |
|
320 |
101 |
37-4P / Gearbox |
160 |
50.52 |
30-4P / Gearbox |
||||
|
260 |
82 |
37-4P / Gearbox |
100 |
31.57 |
22-4P / Gearbox |
||||
Table3：Performance Parameters (Pressure: 1.2 MPa / Head: 120 m)
|
Model |
Gear Reducer Drive (1.2MPa Working Pressure / 120m Head) |
Variable Speed Motor Drive (Adjustable) |
|||||||
|
Speed (rpm) |
Flow Rate (m³/h) |
Motor Spec. (kW) |
Speed (rpm) |
Flow Rate (m³/h) |
Motor Spec. (kW) |
Speed (rpm) |
Flow Rate (m³/h) |
Motor Power (kW) |
|
|
G20-2 |
960 |
0.8 |
1.1-6P |
480 |
0.4 |
0.75-4P / Gearbox |
200~1000 |
0.16~0.8 |
1.1 |
|
720 |
0.8 |
1.1-8P |
320 |
0.27 |
0.55-4P / Gearbox |
||||
|
640 |
0.54 |
1.1-4P / Gearbox |
200 |
0.16 |
0.55-4P / Gearbox |
||||
|
G25-2 |
960 |
2 |
2.2-6P |
480 |
1 |
1.5-4P / Gearbox |
200~1000 |
0.41~2 |
2.2 |
|
720 |
1.5 |
2.2-8P |
320 |
0.66 |
1.1-4P / Gearbox |
||||
|
640 |
1.3 |
2.2-4P / Gearbox |
200 |
0.41 |
1.1-4P / Gearbox |
||||
|
G30-2 |
960 |
5 |
3-6P |
480 |
2.5 |
2.2-4P / Gearbox |
200~1000 |
1.04~5 |
3 |
|
720 |
3.74 |
3-8P |
320 |
1.66 |
1.5-4P / Gearbox |
||||
|
640 |
3.33 |
3-4P / Gearbox |
200 |
1.04 |
1.5-4P / Gearbox |
||||
|
G35-2 |
960 |
8 |
4-6P |
480 |
4 |
3-4P / Gearbox |
200~1000 |
1.66~8 |
4 |
|
720 |
6 |
4-8P |
320 |
2.66 |
2.2-4P / Gearbox |
||||
|
640 |
5.33 |
4-4P / Gearbox |
200 |
1.66 |
2.2-4P / Gearbox |
||||
|
G40-2 |
960 |
12 |
5.5-6P |
480 |
6 |
4-4P / Gearbox |
200~1000 |
2.5~12 |
5.5 |
|
720 |
9 |
5.5-8P |
320 |
4 |
3-4P / Gearbox |
||||
|
640 |
8 |
5.5-4P / Gearbox |
200 |
2.5 |
3-4P / Gearbox |
||||
|
G50-2 |
960 |
20 |
7.5-6P |
480 |
10 |
5.5-4P / Gearbox |
200~1000 |
4.16~20 |
7.5 |
|
720 |
15 |
7.5-8P |
320 |
6.66 |
4-4P / Gearbox |
||||
|
640 |
13.3 |
7.5-4P / Gearbox |
200 |
4.16 |
4-4P / Gearbox |
||||
|
G60-2 |
720 |
30 |
11-8P |
400 |
16.66 |
7.5-4P / Gearbox |
63~630 |
1~20 |
15 |
|
600 |
25 |
11-4P / Gearbox |
300 |
12.5 |
5.5-4P / Gearbox |
||||
|
500 |
20.83 |
11-4P / Gearbox |
200 |
8.33 |
5.5-4P / Gearbox |
||||
|
G70-2 |
720 |
38 |
15-8P |
400 |
21.11 |
11-4P / Gearbox |
56~560 |
1~22 |
15 |
|
600 |
31.66 |
15-4P / Gearbox |
300 |
15.83 |
11-4P / Gearbox |
||||
|
500 |
26.38 |
15-4P / Gearbox |
200 |
10.55 |
7.5-4P / Gearbox |
||||
|
G85-2 |
600 |
50 |
22-4P / Gearbox |
300 |
25 |
15-4P / Gearbox |
37~370 |
2~24 |
22 |
|
500 |
41.66 |
22-4P / Gearbox |
200 |
16.66 |
11-4P / Gearbox |
||||
|
400 |
33.33 |
18.5-4P / Gearbox |
100 |
8.33 |
11-4P / Gearbox |
||||
|
G105-2 |
380 |
80 |
37-4P / Gearbox |
200 |
42.1 |
22-4P / Gearbox |
29~290 |
3~50 |
37 |
|
320 |
67.36 |
37-4P / Gearbox |
160 |
33.68 |
22-4P / Gearbox |
||||
|
260 |
54.73 |
37-4P / Gearbox |
100 |
21.05 |
22-4P / Gearbox |
||||
Table4：Performance Parameters for Single & Two-Stage Screw Pumps
|
Pump Model |
Flow Rate (m³/h) |
Working Pressure (MPa) |
Speed (rpm) |
Gear Reducer Matched Adjustable Motor Model (kW) |
|
G30-2 |
0.15~1.56 |
1.2 |
30~300 |
YCT160/4A-2.2 |
|
G35-2 |
0.25~2.5 |
1.2 |
30~300 |
YCT160/4A-2.2 |
|
G40-2 |
0.37~3.5 |
1.2 |
30~280 |
YCT160/4A-3 |
|
G50-1 |
0.58~5.83 |
0.6 |
28~280 |
YCT180/4A-4 |
|
G50-2 |
0.52~5.2 |
1.2 |
25~250 |
YCT200/4A-5.5 |
|
G60-1 |
0.78~7.81 |
0.6 |
25~250 |
YCT200/4A-5.5 |
|
G60-2 |
1.04~10.41 |
1.2 |
25~250 |
YCT200/4B-7.5 |
|
G70-1 |
1.31~11.61 |
0.6 |
25~220 |
YCT200/4B-7.5 |
|
G85-1 |
1.5~15 |
0.6 |
18~180 |
YCT225/4A-11 |
|
G105-1 |
2.94~29.47 |
0.6 |
14~140 |
YCT225/4B-15 |
|
G135-1 |
3.15~31.57 |
0.6 |
10~100 |
YCT250/4B-22 |
Q1: What kind of heavy or thick liquids can this screw pump transfer?
The G series is built for tough, viscous liquids that normal water pumps cannot handle. It smoothly transfers thick fluids like wastewater sludge, food pastes, syrup, coatings, chemical resins, and liquids containing small solid particles or fibers without clogging or shaking the pipeline.
Q2: Why is a screw pump better at precise liquid transfer and steady flow?
Inside the pump, a steel screw turns inside a rubber sleeve, creating sealed cavities that push liquid forward continuously. This design delivers a steady, smooth flow with zero splashing. Because output speed directly controls flow volume, it is perfect for precise chemical feeding and process measurement.
Q3: How do I choose the right rubber sleeve (stator) material for my liquid?
NR / NBR (Rubber): Best for standard sewage, oily wastewater, and general industrial liquids.
EPDM: Ideal for hot water, mild acid/alkali solutions, and applications needing high-temperature steam cleaning.
FKM (Viton): Designed for harsh chemicals, strong acids, solvents, and high-temperature corrosive fluids.
Q4: What is the most important rule to keep in mind when operating this pump?
Never run the pump dry. The internal rubber sleeve needs liquid for lubrication and cooling. Before starting the pump, always fill the casing with liquid. Running it empty will cause friction heat to burn out the rubber sleeve very quickly.
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Telephone
+86 18167392360
Mailbox
Address
No.16 Linwu Road, Oubei Street, Yongjia, Wenzhou, Zhejiang, China