1.Progressive Cavity Pump Connecting Rod
As a professional progressive cavity pump manufacturer, we also produce high quality cavity pump connecting rods to guarantee top pump performances. We can customize the connecting rod to meet exact customer requirements, and in different structures, such as the asymmetrical connecting rod, taper connecting rod, or multi-layer connecting rod.
Weifang Subtor as a German Subtor invested company in China, offers wide range of progressive cavity pumps and connecting rod components. With German supported technology and rich marketing resources, Subtor provides quality PCP pumps as well as rotor stator parts for global clients.
2. Progressive Cavity Pump Stator
A stator is one of the most important components to a progressive cavity pump, and is often divided into two types: a rubber stator, or a rigid stator. We offer customized stators according to actual field conditions and the transmission medium.
1. Rubber stator: Stators are a vulnerable part of progressive cavity pump. When the stator surface becomes worn, the sealing performance between the rotor and the stator decreases, which results in a decreased flow. Different rubbers, such as NBR, NBRH, HNBR, EPDM and FKM with corrosion resistance and high temperature resistance need to be chosen to suit different mediums.
2. Rigid stator: Rigid stators include a metal stator or PTFE stator. A rigid stator is recommended in specialized work environments, such as the transportation of hot oil, high temperature bitumen, high temperature heavy oil, concentrated acid or alkali, and a high concentration of chloride ions.
Features of rigid stator
1. It features a high temperature resistance- up to 300℃.
2. The rigid stator can bear a high pressure medium. They feature a small torque and a single stage pressure of up to 12 bar.
3. In a progressive cavity pump with the same flow, a pump with a rigid stator will be smaller than one with a rubber stator.
4. Metal stators feature a quick heat dissipation, no abrasion and a longer service life.
5. PTFE stators are suitable for strong acidic and alkaline environments, as well as mediums with a high chlorine content.
Introduction of common stator material
Material |
Corrosion resistance |
Swelling resistance |
Abrasion resistance |
High temperature resistance |
Temperature range |
Suitable Application |
NBR |
general |
good |
general |
general |
+110℃ |
Petroleum, sewage, food and beverage, chemical, or paper making industry |
NBRH |
good |
excellent |
good |
general |
+120℃ |
Oil refining, chemical, waste water |
EPDM |
good |
poor |
good |
general |
+120℃ |
Chemical industry, chemical reagent, paper making |
FKM |
excellent |
excellent |
poor |
excellent |
+180℃ |
High temperature and corrosive fluid |
HNBR |
excellent |
good |
good |
excellent |
+170℃ |
Petroleum, petrochemical and chemical industry |
PTFE |
excellent |
excellent |
poor |
excellent |
+230℃ |
Acid & alkali and other strong corrosive medium, high temperature and high hygiene requirements of the food and beverage industry |
Note: All information above can be combined based on specific requirements, the particular medium that needs moving, and the working conditions. Please contact us for more details.
3. Progressive Cavity Pump Rotor
We can design and process rotors in different geometric shapes to meet specific customer requirements. The metal materials used can also be treated for surface hardening or vacuum heating, with the hardness of the metal after treatment reaching HRC60-65°. The surface can also be sprayed with a tungsten carbide or chromium carbide in specific industries to give the surface a hardness of HRC68° in order to improve its wear resistance.
Material |
Corrosion resistance |
Abrasion resistance |
Chlorine resistant Cl- concentration(ppm) |
Suitable Application |
Carbon steel |
general |
general |
poor |
For abrasive but noncorrosive fluid, cannot be used for food |
Carbon steel (harden treatment) |
general |
excellent |
poor |
For non-corrosive but highly abrasive fluid |
SS420 (harden treatment) |
general |
good |
poor |
For slightly corrosive and abrasive fluid |
SS304 |
good |
general |
< 100 |
Can be used in the food industry and for non-corrosive acidic fluid |
SS304 (harden treatment) |
good |
good |
< 100 |
For corrosive and abrasive fluid, cannot be used for food |
SS316 |
good |
general |
100~2000 |
Can be used in the food industry and for non-abrasive acid fluid |
SS316 (harden treatment) |
excellent |
excellent |
100~2000 |
For corrosive and abrasive fluid, cannot be used for food |
Duplex SS |
excellent |
excellent |
1000~40000 |
For corrosive fluid with high content of Cl ion but non-abrasive acid fluid |
Duplex SS (harden treatment) |
excellent |
excellent |
1000~40000 |
For corrosive fluid with high content of Cl ion and abrasive acid fluid |
Introduction of common material of rotor
Note: the materials used in the rotor detailed above can be combined based on specific customer requirements, the particularity of the medium or actual work conditions. Please contact us for more detail.
Weifang Subtor as a German Subtor invested company in China, offers wide range of progressive cavity pumps and rotor components. We provide carbon steel rotor, stainless steel rotor, duplex stainless steel rotor, etc. With German supported technology and rich marketing resources, Subtor provides quality PCP pumps as well as rotor parts for global clients.
4.ther Progressive Cavity Pump Replacement Parts
We maintain a stock of common progressive cavity pump spare parts, including a universal joint sheath, O seal ring, universal joint component and more. By doing so, we can ensure a quick, on-time delivery to meet customer needs.
Weifang Subtor as a German Subtor invested company in China, offers wide range of progressive cavity pumps and components. With German supported technology and rich marketing resources, Subtor provides quality PCP pumps as well as pump seal parts for global clients.
