NMV industrial screw pump with variable frequency motor
NMV industrial screw pump with variable frequency motor - Image 2
NMV industrial screw pump with variable frequency motor - Image 3
NMV industrial screw pump with variable frequency motor - Image 4
Progressive Cavity Pump

NMV industrial screw pump with variable frequency motor

  • Flow Range: 2 to 300 m³/h
  • Head Range: 60 to 120 m
  • Diameter: 25 to 150 mm
  • Working Pressure: ≤1.6 MPa
  • Medium Temperature: ≤80°C
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Overview——NMV screw pump with VFD motor

The NMV industrial screw pump with variable frequency motor（VFD）operates on the principle of rotary positive displacement. The main working components are the eccentric screw (rotor) and the stationary liner (stator). Due to the unique geometry of these two components, separate sealing chambers are formed, allowing the medium to flow axially and uniformly. This design results in low internal flow velocity, minimal noise, constant volume, and stable pressure. Consequently, there are no vortices or turbulence, and the medium’s inherent structure remains intact.

The stator is made from various elastic materials, which allows the screw pump to handle high-viscosity fluids and media containing hard suspended particles or fibers more effectively than conventional pumps.

Advantages

    • Uniform Liquid Discharge, Stable Pressure: Unlike centrifugal pumps, screw pumps do not require valve installations, resulting in more stable flow rates and pulsation-free pressure.
    • Stronger Self-Priming Capability: Compared to piston pumps, single screw pumps offer superior self-priming ability, allowing them to handle various conditions with greater efficiency.
    • Multi-phase Medium Transport: Single screw pumps can handle a range of mixed media including liquids, gases, and solids, unlike diaphragm pumps. They can transport mediums containing gases and solid particles or fibers, and are also capable of handling corrosive substances.
    • High Viscosity Transport: Unlike gear pumps, screw pumps can handle higher viscosity mediums, making them suitable for transporting very thick fluids.
    • Chemical Dosing and Metering: Single screw pumps are used for chemical dosing and metering, providing a different capability compared to piston pumps, diaphragm pumps, and gear pumps.
    • Innovative Structural Design: The pump’s pitch is shortened, reducing its overall volume. The optimized universal joint design effectively reduces mechanical vibrations, extending the pump’s operational life.
    • Strong Medium Adaptability: Screw pumps are versatile, capable of handling lubricating or non-lubricating media, corrosive substances, mediums with small solid particles, and a wide range of viscosities from low to extremely high.

Performance

GIM FLUID® NMV Series Technical Parameters

No.ModelSpeed (rpm)Flow (m³/h)Pressure (Mpa)Power (kW)
1NMV20-1125～12500.1～1.50.1 ～0.61.1
2NMV20-1125～12500.1～1.50.1 ～0.61.1
3NMV20-1125～12500.1～1.50.1 ～0.61.1
4NMV25-1125～12500.1～30.1 ～0.61.5
5NMV25-1125～12500.1～30.1 ～0.61.5
6NMV25-1125～12500.1～30.1 ～0.61.5
7NMV30-1125～12500.2～40.1 ～0.62.2
8NMV30-1125～12500.2～40.1 ～0.62.2
9NMV30-1125～12500.2～40.1 ～0.62.2
10NMV35-1125～8900.3～50.1 ～0.63
11NMV35-1125～8900.3～50.1 ～0.63
12NMV35-1125～8900.3～50.1 ～0.63
13NMV40-1125～8900.3～100.1 ～0.64
14NMV40-1125～8900.3～100.1 ～0.64
15NMV40-1125～8900.3～100.1 ～0.64
16NMV50-180～7501～180.1 ～0.65.5
17NMV50-180～7501～180.1 ～0.65.5
18NMV50-180～7501～180.1 ～0.65.5
19NMV60-163～6301～200.1 ～0.611
20NMV60-163～6301～200.1 ～0.611
21NMV60-163～6301～200.1 ～0.611
22NMV70-156～5601～220.1 ～0.611
23NMV70-156～5601～220.1 ～0.611
24NMV70-156～5601～220.1 ～0.611
25NMV85-137～3702～240.1 ～0.615
26NMV85-137～3702～240.1 ～0.615
27NMV85-137～3702～240.1 ～0.615
28NMV105-129～2903～500.1 ～0.622
29NMV105-129～2903～500.1 ～0.622
30NMV105-129～2903～500.1 ～0.622
31NMV135-118～1803～560.1 ～0.645
32NMV135-118～1803～560.1 ～0.645
33NMV135-118～1803～560.1 ～0.645
34NMV20-2125～12500.1～1.50.1 ～1.21.5
35NMV20-2125～12500.1～1.50.1 ～1.21.5
36NMV20-2125～12500.1～1.50.1 ～1.21.5
37NMV25-2125～12500.1～30.1 ～1.22.2
38NMV25-2125～12500.1～30.1 ～1.22.2
39NMV25-2125～12500.1～30.1 ～1.22.2
40NMV30-2125～12500.2～40.1 ～1.23
41NMV30-2125～12500.2～40.1 ～1.23
42NMV30-2125～12500.2～40.1 ～1.23
43NMV35-2125～8900.3～50.1 ～1.24
44NMV35-2125～8900.3～50.1 ～1.24
45NMV35-2125～8900.3～50.1 ～1.24
46NMV40-2125～8900.3～100.1 ～1.25.5
47NMV40-2125～8900.3～100.1 ～1.25.5
48NMV40-2125～8900.3～100.1 ～1.25.5
49NMV50-280～7501～180.1 ～1.27.5
50NMV50-280～7501～180.1 ～1.27.5
51NMV50-280～7501～180.1 ～1.27.5
52NMV60-263～6301～200.1 ～1.215
53NMV60-263～6301～200.1 ～1.215
54NMV60-263～6301～200.1 ～1.215
55NMV70-256～5601～220.1 ～1.218.5
56NMV70-256～5601～220.1 ～1.218.5
57NMV70-256～5601～220.1 ～1.218.5
58NMV85-237～3702～240.1 ～1.222
59NMV85-237～3702～240.1 ～1.222
60NMV85-237～3702～240.1 ～1.222
61NMV105-229～2903～500.1 ～1.237
62NMV105-229～2903～500.1 ～1.237
63NMV105-229～2903～500.1 ～1.237
64NMV135-218～1803～560.1 ～1.275
65NMV135-218～1803～560.1 ～1.275
66NMV135-218～1803～560.1 ～1.275

For more information, please contact us.

Selection Principles

1. According to the viscosity of the medium

Viscosity（cst）1~10001000~1000010000~100000100000~1000000
Speed（rpm）400~1000200~400＜200＜100

2. According to the wear condition of the medium

Media wear conditionMediumSpeed（rpm）
No wear and tearFreshwater, coagulants, oil, pulp, soapy water, blood, glycerin, etc400~1000
General wear and tearIndustrial wastewater, paint pigments, adhesive mortar, fish, wheat bran. Sediments from filtered rapeseed oil, etc200~400
Severe wear and tearMud, lime slurry, plaster, clay, clay, etc50~200

3. According to the output pressure level

AbrasivenessLevel 1Level 2AbrasivenessLevel 1Level 2AbrasivenessLevel 1Level 2
None0.6Mpa1.2MpaOrdinary0.4Mpa0.8MpaSerious0.2Mpa0.4Mpa

Material Features

MaterialNitrile rubberFluororubberEDPM rubberNatural rubber
FeaturesNBRFPMEPDMNR
Temperature tolerance+100℃+150℃+120℃+60℃
Wear resistance○○●○
Aging resistance●○○×
Ozone resistance×○○×
Steam resistant●○○×
flame resistance●○○×
Note●: Excellent ○: Good ×: Bad
MaterialNitrile rubberFluororubberFood-grade rubberEPDM rubberNatural rubber
FeaturesNBRFPMW-NBREPDMNR
Water/sewage●●●●△
Vegetable oil●●●△×
Mineral oil●●●××
Ammonia●×●△●
Aromatic solvent×●×××
Concentrated alkali●×●●×
Concentrated nitric acid×△×××
Glacial acetic acid●●●×△
Diluted sulfuric acid●●●●●
Concentrated sulfuric acid×●×△×
Diluted hydrochloric acid●●×●●
Hydrochloric acid●●●●●
Hot-water△×△●×
Gasoline●●●××
Toluene×●×××
Xylene×●×××
Ethanol●●●△●
Kerosene●●●××
Diesel oil●●●××
Argon chloride×△×××
Ketone×××●×
Alcoholic●●●●●
Lipid×××●×
Ethers×××●×
Mud●△●●●
Phosphoric acid△△△●●
Sodium carbonate●×●●●
Glucuronic acid△△△●×
Benzene×●×××
acetone×××●×
Linseed oil●●●●×
Carbon disulfide×●×××
Notes●: Excellent △: ordinary ×: Bad
For more medium please contact us

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