Spare parts of progressive cavity pump?

We can provide conventional stators, rotors, connecting rods, universal joint components, mechanical seals/packing seals, drive shafts, etc.

We can also provide after-sales replacement parts for the following brands：
Netzsch®, Seepex®, Mono Pumps®, Allweiler®, PCM®, Wangen®, etc.

If you are other brands of spare parts and have old parts or drawings, we can also produce them.

You need to provide the pump model (the pump label can be provided), serial number (optional), the position number of the part, and the description or name of the part. If there is nothing, you can provide the photos of the spare parts you need or the measured size.

We believe that the most important factor to consider is that your pump will be frequently or prematurely worn or damaged after replacement of new spare parts. If this situation still occurs after excluding system factors, you need to replace the pump with a new one, because it is likely that there is a problem with the selection of the pump. Of course, if you are replacing spare parts for the first time, you only need to consider the value of the replacement spare parts or the value of a brand new pump.

Tips：
General spare parts only need to replace the stator, rotor, and universal joint components. Occasionally, connecting rods, drive shafts, mechanical seals or packing are required.

Of course!
First of all, you have to determine whether you need to ensure the installation size, if necessary, we have to redesign the size of the pump to meet your working conditions and size.
Then you need to provide the most conventional information: the fluid delivered by the pump, viscosity, temperature, physical and chemical properties, required flow rate, outlet pressure, inlet pressure and pipe inner diameter.

The special geometry of the stator and rotor makes them cooperate with each other to form several mutually unconnected sealing cavities (cavities), and the cooperation between them is interference fit. When the motor operates, it will transfer power to the rotor and make the rotor move planetary along the axial direction, so as to push the sealing cavity to move to the discharge end and achieve the purpose of conveying liquid.

When the stator begins to wear, the fit gap between the rotor and stator will become larger, which may cause the rotor not to be too tight in the stator.

When the delivered fluid reaches the outlet of the pump, the discharge pressure of the circuit must be overcome;

However, the fluid will generally seek the path with the least resistance;

If the resistance of the seal chamber between the stator and the rotor is the minimum, part of the liquid will leak to the previous chamber.

Generally according to different working conditions and the medium to choose the right material.

It can be roughly divided into two factors: chemical compatibility and wear resistance.

Chemical compatibility: generally, the medium is chemically corrosive, in this case, we usually choose stainless steel (304, 316, duplex stainless steel) or titanium alloy material.

According to the chemical corrosivity, we will choose the appropriate stainless steel material.

Of course, stainless steel is also used in the food industry.

Wear resistance: when the medium contains fine particles, we need to fully consider its wear resistance;

And ways to improve wear resistance:

1. Use hard materials such as hardened tool steel (1.2436). It can also be subjected to heat treatment or nitriding treatment to improve its wear resistance.

2. Chrome plating on the surface of the rotor.（ We are plated with 5mm chromium on one side, and can also be plated according to your requirements.)

Whether it is hardened tool steel or stainless steel, we can electroplate on its surface.

Note: if the electroplated layer is damaged, the stator will be damaged.

Need more outlet pressure, please choose high pressure pump with bearing.

Generally our progressive cavity pump pressure is 0.6MPa as a unit level, and then gradually increase.

To increase the pressure, we will consider increasing the number of continuous seal chambers in the pump.

This also results in an increase in the number of seal lines between the stator and the rotor.

At a given pressure, when the number of sealing lines increases, the internal leakage rate of the pump will decrease.