Gerotor fumes
The gerotor pair is the consumable working part of a single-screw pumping unit and consists of two main elements: a rotor and a stator. It is these details that determine the working process of the pump.
General Information
Rotor + stator
The gerotor pair consists of a metal rotor and an elastomeric stator, which is the heart of the screw pump.
5 standard pressure sizes
From 00 (6 bar) to 04 (24 bar) — for any task: from standard to maximum
4 Stator materials
HNBR, xNBR, EPDM, FKM (Viton) — suitable for any environment: petroleum products, chemicals, abrasive, high temperatures
4 Rotor materials
From heat—treated steel 1.2436 to chrome-plated 1.4571 HV with a coating of 250 microns - high strength and wear resistance
Standard pressure sizes:
| Designation | Pressure | Note |
| 00 | 6 bar | Standard version |
| 01 | 6 bar | Productivity is 2 times higher at the same RPM |
| 02 | 12 bar | Increased blood pressure |
| 03 | 18 bar | High pressure |
| 04 | 24 bar | Maximum pressure |
Materials of stators (elastomers)
The choice of stator material is determined by the properties of the pumped medium and the operating conditions.:
- HNBR (hydrogenated butadiene-nitrile rubber) is resistant to high temperatures and abrasive wear, and has good physical properties. Temperature range: -40 to +125 °C. It surpasses traditional butadiene-nitrile rubber in oil and heat resistance.
- xNBR (carboxylated butadiene-nitrile rubber) is a modification with the addition of acid groups. Temperature range: -40 to +100 °C. It is characterized by increased elongation and improved resistance to abrasive wear.
- EPDM (ethylene-propylene-diene rubber) is a chemically resistant elastomer. It is resistant to acidic and alkaline solutions (up to 10%), as well as to abrasive particles. Temperature range: -55 to +110 °C.
- FKM (Viton, fluorinated rubber) is used in oil production, when pumping petroleum products, aggressive chemical liquids and salt solutions. Temperature range: -20 to +180 °C. Moderate resistance to abrasives.
Rotor materials
The rotors of the Belgorod Hydromechanical Plant are made of the following types of steel:
- 1.2436 (analog 40X) — heat-treated steel, high strength;
- 1.4571 (analog 10X17H13M2T) — corrosion-resistant stainless steel;
- 1.4571 HV — corrosion-resistant chrome-plated steel;
- 1.4571 HV (250 µm HVC) is a corrosion—resistant chrome-plated steel with increased wear resistance.
Features and Advantages
Gerotor steam is a consumable working part that determines the working process of the pump
5 standard pressure sizes: from 6 to 24 bar (00, 01, 02, 03, 04)
Version 01 — performance is 2 times higher at the same RPM
4 stator materials for any media: HNBR, xNBR, EPDM, FKM (Viton)
HNBR — resistance to high temperatures (up to +125°C), oils and abrasive wear
xNBR — increased tensile strength and improved resistance to abrasive wear
EPDM — chemical resistance to acids and alkalis (up to 10%), operating from -55 to +110°C
FKM (Viton) — for oil production, aggressive chemicals, salt solutions, operation up to +180°C
4 rotor materials: 1.2436 (40X), 1.4571 (stainless steel), 1.4571 HV (chrome plated), 1.4571 HV (250 microns) — increased wear resistance
Corrosion-resistant stainless steel 1.4571 for aggressive environments
Chrome-plated steel 1.4571 HV coated up to 250 microns for maximum wear resistance
Own production — full quality control at all stages
Stators
Stator elastomers are made of the following materials:
- HNBR (hydrogenated butadiene-nitrile rubber). It has relative resistance to high temperatures, abrasive wear and good physical properties. The temperature range is -40 to +125 °C. Better resistance to high temperatures and oils than traditional nitrile butadiene rubber.
- xNBR (carboxylated butadiene-nitrile rubber). Modification of butadiene-nitrile rubber by adding acid groups. The temperature range is -40 to +100 °C. The tensile strength and resistance to abrasive wear are increased compared to traditional butadiene-nitrile rubber.
- EPDM (ethylene propylene-diene rubber). Chemically resistant elastomer. It is resistant to solutions with an acid or alkali concentration of up to 10%, as well as to the presence of abrasive particles in the pumped liquid. Operating temperature -55…+1100C
- FKM (Viton) (fluorinated rubber). It is used in pumps for oil production, when pumping petroleum products, aggressive chemical liquids and salt solutions. Wide operating temperature range -20…+1800C. Resistance to abrasive particles is moderate
Rotors
The rotors of the Belgorod Hydromechanical Plant can be made of the following types of steel:
- 1.2436 – heat-treated, 40X analog
- 1.4571 – corrosion resistant, analog of 10X17H13M2T
- 1.4571HV – corrosion-resistant chrome-plated steel
- 1.4571HV(250µmHVC) – corrosion-resistant chrome-plated steel with increased wear resistance
Pick up Equipment
Submit a request and our engineers will help you choose the right pump for your needs