Progressive cavity pump spare parts
Mingjie supplies (both original and generic) replacement progressive cavity pump spare parts such as rotors, stators, coupling rod, driving shaft, seals, and are suitable for many well-known popular brands PC pumps. We have enough stock to ship at any time.
What are the
spare parts of progressive cavity pump?
Ready to Ship Just for You
Complete models and large stock of progressive cavity pump spare parts!
The Stator of a Progressive Cavity Pump
The stator is mostly made of rubber. Because it needs to form a closed meshing cavity with the rotor, it is an interference fit with the rotor. When the rotor (main shaft) rotates and causes continuous friction, it will wear naturally.
The Rotor of a Progressive Cavity Pump
The Progressive cavity pump rotor (also known as the main shaft) is mostly made of stainless steel, and can be selectively plated with chrome;
Due to its meshing relationship with the characteristic geometry of the stator, in addition to natural wear, it is also whether the conveyed medium contains solid particles and corrosive.
The Coupling Rod of a Progressive Cavity Pump
The coupling rod connects the rotor and the drive shaft. When the motor is running, the drive shaft drives the coupling rod, and the coupling rod then drives the rotor to play a transmission role. Except for the drive shaft, these mechanical components are located in the suction chamber of the pump.
The Drive Shaft of a Progressive Cavity Pump
The drive shaft is generally connected to the drive end (reducer or various drive motors), and its wear is mostly caused by natural wear or changes in media working conditions.
The Universal Joint Assembly a Progressive Cavity Pump
The universal joint assembly is located at both ends of the coupling rod. It successfully connects the rotor and the drive shaft to the coupling rod more stably and firmly; Since the universal joint assembly consists of a variety of small spare parts, we need to check its seal regularly And lubrication.
Mechanical Seal
Mechanical seals are generally used to transport media with corrosion resistance, high moisture content or no particles or even a small amount of particles.
Advantages: Long life, no leakage, good vibration resistance, and a wide range of applications;
Disadvantages: Complex structure, high processing requirements, troublesome installation and replacement.
Packing Seal
The packing seal is mostly polytetrafluoroethylene packing, which is generally used for conveyor belt particles or media with low moisture content;
Advantages: The packing seal is wear-resistant, low cost, easy to install and replace;
Disadvantages: The medium will leak out of the stuffing box as drops and needs to be cleaned regularly.
Progressive cavity pump parts material list
| No. | Name | Matiral |
|---|---|---|
| 1 | Material-out chamber | HT200, 1Cr18Ni9Ti, 304, 316L, 2205, Ti |
| 2 | Rotor | 45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr) |
| 3 | Stator | NR, NBR, Q, EPM, FKM |
| 4 | Suction chamber | HT200, 304, 316L, 2205, Ti |
| 5 | Driving shaft | 45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr) |
| 6 | Gear motor | / |
| 7 | Base plate | 45#, 2Cr13, 304, 316L, 2205, Ti |
| 8 | Coupling rod | 45#, 2Cr13, 304, 316L, 2205, Ti (Heat-treatable and electroplated Cr) |
| 9 | Universal joint assembly | NBR + 45#, 2Cr13, 304, 316L |
| 10 | Shaft sealing | Customized according to media |
Aftermarket Netzsch® Progressive Cavity Pumps and Pump Parts
Mingjie Pump stocks Netzsch® Brand NE series and NM series replacement aftermarket pumps and progressive cavity pump parts. Including stator, rotor, coupling rod, universal joint assembly, drive shaft, mechanical seal, mechanical seal casing, packing, packing chamber and pump body, almost all can be provided, except for special pump types.
Netzsch® NM series spare parts list
Pump identification no. N010844-NM031BY01P05B (For reference only)
| Part no. | Description | Quantity | Identification no. |
|---|---|---|---|
| pin | 2 | NLP8000068 | |
| hexagon. Nut | 2 | NLP6007847 | |
| 0085 | drive stool | 1 | 5066509 |
| 0365 | elbow | 1 | 520096 |
| 1020 | name plate | 1 | NLP8000314 |
| 1020 | number plate | 1 | 892897 |
| 1030 | pin | 1 | 5067630 |
| 1035 | thrower | 1 | NMP5066416 |
| 1050 | connecting shaft | 1 | NLP6002301 |
| 1998 | coupling rod | 1 | NLP6000534 |
| 1999 | rotor | 1 | 5060244 |
| 2005 | end socket | 1 | 955217 |
| 2010 | pump housing | 1 | NLP6011279 |
| 2015 | drain plug | 3 | NLP8000290 |
| 2016 | drain plug | 1 | NLP8000269 |
| 2020 | bolt | 4 | 687463 |
| 2035 | support | 1 | 955466 |
| 3005 | stator | 1 | 5072602 |
| 3010 | thru bolt | 4 | 955464 |
| 3015 | spring washer | 8 | 502014 |
| 3070 | washer | 4 | 502002 |
| 5065 | circlip | 2 | 512277 |
| 5115 | sleeve | 2 | 861394 |
| 5425 | clamp ring | 2 | NLP8000448 |
| 7015 | stuffing box housing | 1 | NLP6001432 |
| 7030 | bolt | 2 | NLP8000387 |
| 7040 | packing | 6 | 691464 |
| 8010 | gasket | 3 | 422526 |
| 8012 | gasket | 1 | 422527 |
| 8015 | O-ring | 1 | 516326 |
| 8060 | O-ring | 4 | 516955 |
| 8235 | SM-pin joint seal | 2 | 878237 |
| 9510 | helical geared motors | 1 | RC06900 |
Aftermarket Seepex® Progressive Cavity Pumps and Pump Parts
We offer Sepeex ® Brand BN series and MD series replacement aftermarket progressing cavity pumps parts and pumps. Including stator, rotor, coupling rod, universal joint assembly, drive shaft, mechanical seal, mechanical seal casing, packing, packing chamber and pump body, almost all can be provided, except for special pump types.
Index of BN series spare parts and recommended spare/reserve parts
05-24, 1-6, 1-12, 2-6L…202-6L
| Part No. | Description | Quantity |
|---|---|---|
| 200 | lantern | 1 |
| 202 | round head grooved pins | 2 |
| 203 | type plate | 1 |
| 210 | hexagon bolt | 4 |
| 211 | hexagon bolt | |
| 212 | spring washer | 4 |
| 213 | hexagon nut | 4 |
| 307 | plug-in shaft | 1 |
| 309 | plug-in shaft pin | 1 |
| 310 | splash ring | 1 |
| 400 | coupling rod | 1 |
| 401 | retaining sleeve | 2 |
| 402 | coupling rod pin | 2 |
| 403 | guide bushing | 4 |
| 404 | coupling rod bushing | 2 |
| 405 | universal joint sleeve | 2 |
| 406 | holding band | 2 |
| 407 | holding band | 2 |
| 500 | suction casing | 1 |
| 501 | casing gasket | 1 |
| 502 | screwed plug | 3 |
| 503 | sealing ring | 3 |
| 506 | hexagon bolt | 4 |
| 507 | fan type lock washer | 4 |
| 509 | hexagon nut | 4 |
| °) 510 | cleanout | 2 |
| °) 511 | gasket | 2 |
| °) 512 | hexagon bolt | 8 |
| °) 516 | screwed plug | 2 |
| °) 517 | sealing ring | 2 |
| 600 | rotor | 1 |
| 601 | stator | 1 |
| 602 | tie bolt | 2 |
| 603 | tie bolt | 2 |
| 604 | hexagon nut | 8 |
| 606 | washer | 8 |
| 607 | trestle | 1 |
| 700 | pressure branch | 1 |
| 705 | screwed plug | 1 |
| 706 | sealing ring | 1 |
| 098 | seepex joint grease |
Aftermarket Mono® Progressive Cavity Pumps and Pump Parts
Sed mollis
We provide you with aftermarket pumps and progressive cavity pump spare parts for the following Mono® Pump Models.
Drawing Reference Numbers
C1XK AND ABOVE EXCLUDING 4 – STAGE MODELS
| DRG. REF | DESCRIPTION | DRG. REF | DESCRIPTION |
|---|---|---|---|
| 01A | BODY-STD C.I. | P201 | TAPER PLUG |
| 10A | MECHANICAL SEAL | P202 | TAPER PLUG |
| 15A | THROWER GUARD | P203 | HEX. SOC. SETSCREW |
| 20B | GASKET-GLAND | ||
| 22A | STATOR-MTM NITRILE RUBBER | P401 | TORL SEAL RING |
| 23A | SUCTION CHAMBER | P402 | TORL SEAL RING |
| 23B | SUCT CHAMB EXTENSION | P403 | SPIRAL RET.RING |
| 24A | END COVER | P404 | SPIRAL RET.RING |
| 25A | ROTOR | P405 | TIE-SEALING COVER |
| 26A | COUPLING ROD | P406 | TIE SEALING COVER |
| 28A | SEALING COVER | ||
| 28B | SEALING COVER | P501 | TAPER PLUG |
| 29A | COUPLING ROD PIN | P502 | TAPER PLUG |
| 29B | COUPLING ROD PIN | P503 | HEX. NUT |
| 29C | SHAFT PIN | P504 | WASHER |
| 32A | DRIVE SHAFT | P505 | SNGL. COIL SPR. WASHER |
| 42A | THROWER | P506 | HEX. NUT |
| 62A | SUPPORT FOOT | P507 | WASHER |
| 65A | MECH SEAL CARRIER | P508 | SNGL. COIL SPR. WASHER |
| 66A | ABUTMENT RING | P509 | TORL SEAL RING |
| 74A | SLEEVE (ROTOR-SHAFT) | P510 | TORL SEAL RING |
| 74B | SLEEVE (ROTOR-SHAFT) | P519 | TAPER PLUG |
| 95A | TIE ROD | P520 | HEX. HD. BOLT |
| P521 | HEX. NUT | ||
| P104 | HEX. HD. BOLT | P522 | WASHER |
| P105 | HEX. NUT | P523 | SNGL. COIL SPR. WASHER |
| P106 | WASHER | ||
| P107 | SNGL. COIL SPR. WASHER | P601 | HEX HD BOLT |
| P109 | HEX NUT | P602 | SNGL. COIL SPR. WASHER |
| P603 | WASHER | ||
| P604 | HEX. NUT |
Aftermarket Moyno® Progressive Cavity Pumps and Pump Parts
We provide you with aftermarket pumps and progressive cavity pump spare parts for the following Moyno® Pump Models.
Index of spare parts and recommended spare/reserve parts
| REF. DESCRIPTION | TYPE | A2A PART NO. | A1B PART NO. | A2B PART NO. | A1C PART NO. | A2C PART NO. |
|---|---|---|---|---|---|---|
| 0100 BEARING HOUSING | CD/SS | CC A2A0110 | CC A2A0110 | CC A2A0110 | CC A2A0110 | CC A2A0110 |
| 0900 PACKING GLAND | CD/SS | SC A2A0910 | SC A2A0910 | SC A2A0910 | SC A2A0910 | SC A2A0910 |
| 1000 STUFFING BOX | CD SS | CC A2A1010 SC A2A1010 | CC A2A1010 SC A2A1010 | CC A2A1010 SC A2A1010 | CC A2A1010 SC A2A1010 | CC A2A1010 SC A2A1010 |
| 1000 SEAL * HOUSING ** | CD/SS CD/SS | SC A2A1011 4240833007 | SC A2A1011 4240833007 | SC A2A1011 4240833007 | SC A2A1011 4240833007 | SC A2A1011 4240833007 |
| 1100 SUCTION CHAMBER | CD SS | CC A2A1110 SC A2A1110 | CC A1B1110 SC A1B1110 | CC A1B1110 SC A1B1110 | CC A1C1110 SC A1C1110 | CC A1C1110 SC A1C1110 |
| 1200 STATOR GASKET | Q/R F B | GG A2A1200 GF A2A1200 GB A2A1200 | GG A1B1200 GF A1B1200 GB A1B1200 | GG A1B1200 GF A1B1200 GB A1B1200 | GG A1C1200 GF A1C1200 GB A1C1200 | GG A1C1200 GF A1C1200 GB A1C1200 |
| 1220 SUCTION CHAM. GASKET | Q/R F B | GG A2A1220 GF A2A1220 GB A2A1220 | GG A2A1220 GF A2A1220 GB A2A1220 | GG A2A1220 GF A2A1220 GB A2A1220 | GG A2A1220 GF A2A1220 GB A2A1220 | GG A2A1220 GF A2A1220 GB A2A1220 |
| 1400 DISCHARGE FLANGE | CD SS | MS A2A1410 SS A2A1410 | MS A1B1410 SS A1B1410 | MS A1B1410 SS A1B1410 | MS A1C1410 SS A1C1410 | MS A1C1410 SS A1C1410 |
| 1700 STATOR SUPPORT | CD/SS | MS A2A1710 | MS A2A1710 | MS A2A1710 | MS A1C1710 | MS A1C1710 |
| 1800 CLAMP RING | CD/SS | MS A2A1810 | MS A1B1810 | MS A1B1810 | MS A1C1810 | MS A1C1810 |
| 2000 SHAFT PIN | CD/SS | 4220487017 | 4220487017 | 4220487017 | 4220487017 | 4220487017 |
| 2100 INTERMEDIATE SHAFT | CD SS | 4250392001 4250392017 | 4250392001 4250392017 | 4250392001 4250392017 | 4250393001 4250393017 | 4250393001 4250393017 |
| 2200 SEAL RING | Q/R F B | 3207902206 3207905206 3207904206 | 3207902206 3207905206 3207904206 | 3207902206 3207905206 3207904206 | 3207902206 3207905206 3207904206 | 3207902206 3207905206 3207904206 |
| 5000 ROTOR | CD SS | TS A2A5000 SS A2A5000 | TS A1B5000 SS A1B5000 | TS A2B5000 SS A2B5000 | TS A1C5000 SS A1C5000 | TS A2C5000 SS A2C5000 |
| 6000 DRIVE SHAFT | CD SS | AS A2A6000 SS A2A6000 | AS A2A6000 SS A2A6000 | AS A2A6000 SS A2A6000 | AS A1C6000 SS A1C6000 | AS A1C6000 SS A1C6000 |
| 6000 DRIVE SHAFT (2-PIECE OPTION) | CD SS | 4250378001 4250378017 | 4250378001 4250378017 | 4250378001 4250378017 | 4250378001 4250378015 | 4250378001 4250378015 |
| 6100 RETAINING RING | CD/SS | ST A2A6100 | ST A2A6100 | ST A2A6100 | ST A1C6100 | ST A1C6100 |
| 6200 CONNECTING ROD | CD/SS | AS A2A6200 | AS A2A6200 | AS A2A6200 | AS A1C6200 | AS A1C6200 |
| 6300 DRIVE PIN | CD/SS | TR A2A6300 | TR A2A6300 | TR A2A6300 | TR A1C6300 | TR A1C6300 |
| 6400 JOINT SEAL | Q/R F/B | RD A2A6400 RF A2A6400 | RD A2A6400 RF A2A6400 | RD A2A6400 RF A2A6400 | RD A1C6400 RF A1C6400 | RD A1C6400 RF A1C6400 |
| 6500 STATOR | Q R F B | RQ A2A6510 RR A2A6510 RF A2A6510 RB A2A6510 | RQ A1B6510 RR A1B6510 RF A1B6510 RB A1B6510 | RQ A2B6510 RR A2B6510 RF A2B6510 RB A2B6510 | RQ A1C6510 RR A1C6510 RF A1C6510 RB A1C6510 | RQ A2C6510 RR A2C6510 RF A2C6510 RB A2C6510 |
| 6800 SLINGER RING | CD/SS | RZ A2A6800 | RZ A2A6800 | RZ A2A6800 | RZ A2A6800 | RZ A2A6800 |
| 6800 SLINGER/PIN RETNR (2-PIECE OPTION) | CD/SS | 423052800 | 423052800 | 423052800 | 423052800 | 423052800 |
| 6850 LANTERN RING | CD/SS | GR A2A6850 | GR A2A6850 | GR A2A6850 | GR A2A6850 | GR A2A6850 |
| 6900 PACKING | STD. PTFE | PC A2A6901 3403655001 | PC A2A6901 3403655001 | PC A2A6901 3403655001 | PC A2A6901 3403655001 | PC A2A6901 3403655001 |
| 7000 NAME PLATE | CD/SS | GA A2A7000 | GA A2A7000 | GA A2A7000 | GA A2A7000 | GA A2A7000 |
| K O-RING | Q/R F/B | CA137 CF137 | CA137 CF137 | CA137 CF137 | CA141 CF141 | CA141 CF141 |
| J SNAP RING | CD SS | EB007 EB507 | EB007 EB507 | EB007 EB507 | EB015 EB015 | EB015 EB015 |
| R STATOR RING | CD/SS | EC022 | EC028 | EC028 | EC034 | EC034 |
*FRICTION DRIVEN SEAL, TYPE 43 OR EQUAL
**POSITIVE DRIVE SEAL, TYPE 680 OR EQUAL
NOTE: CONTACT FACTORY FOR REPLACEMENT MECHANICAL SEAL PART NUMBERS
Aftermarket Allweiler® Progressive Cavity Pumps and Pump Parts
Although Allweiler pump has a tailored code, we can provide most spare parts.
Index of spare parts and recommended spare/reserve parts
Series AEB.E, AEB.N, AEB.H, AEB.L, AEDB.E, AEDB.N Design IE
| Part no. | Description | Recommended spare parts: | Quantity | Mark |
|---|---|---|---|---|
| 122 | Motor bracket | 1 | ||
| 123 | Clamp set | 1 | ||
| 125 | Hollow shaft | R | 1 | |
| 201 | T-head bolt | 2 | ||
| 202 | Self locking nut | 2 | ||
| 203 | Gland | 1 | ||
| 204 | Gland housing | 1 | ||
| 207 | Gland packing | R, r | ① | |
| 208 | Flushing ring | 1 | ||
| 209 | Lantern ring | 1 | ||
| 212 | Screw plug | 1 | ||
| 213 | Sealing tape | 1 | ||
| 214 | Mechanical seal housing | 1 | ||
| 215 | Mechanical seal cover | 1 | ||
| 218 | O-ring | R | 1 | |
| 219 | Mechanical seal | R | 1 | |
| 220 | Retaining pin | 1 | ||
| 232 | Shaft seal ring | R | 1 | |
| 234 | Throttle ring | R | 1 | |
| 235 | O-ring | R | 1 | |
| 236 | Retaining pin | R | 2 | |
| 245 | Hexagon head bolt | 3 | ||
| 251 | Sealing agent | 1 | ||
| 301 | Coupling rod pin | R, r | 2 | |
| 302 | Coupling rod bush | R, r | 2 | ⑤ |
| 303 | Guide bush | R, r | 4 | |
| 304 | Retaining sleeve | R, r | 2 | |
| 305 | Joint oil | R, r | ① | |
| 306 | Clamping band | R, r | 4 | |
| 307 | Coupling rod | R, r | 1 | |
| 308 | Cover sleeve | R, r | 2 | |
| 401 | Rotor | R, r | 1 | |
| 402 | Stator | R, r | 1 | |
| 403 | Stator gasket, discharge side | R, r | 1 | |
| 404 | Stator gasket, suction side | R, r | 1 | |
| 501 | Suction casing gasket | R, r | 1 | |
| 502 | Screw plug | 1 | ||
| 503 | Seal ring | R | 1 | ③ |
| 504 | Discharge casing | 1 | ③ | |
| 505 | Suction casing | 1 | ||
| 506 | Suction casing cover | 2 | ||
| 507 | Gasket | R | 2 | |
| 508 | Stud | 8 | ||
| 509 | Nut | 8 | ||
| 512 | Reducing flange | 1 | ||
| 513 | O-ring | R | 1 | |
| 525 | Washer | 8 | ||
| 601 | Name plate | 1 | ||
| 602 | Dome headed groove pin | 4 | ||
| 603 | Commissioning label | 1 | ||
| 604 | Suction label | 1 | ||
| 605 | Discharge label | 1 | ||
| 606 | Hexagon head bolt | 4 | ||
| 607 | Hexagon nut | 4 | ||
| 608 | Serrated lock washer | 4 | ||
| 609 | Hexagon nut | 4 | ||
| 610 | Washer | 4 | ||
| 611 | Connecting bolt | 4 | ||
| 612 | Stay | 1 | ② | |
| 613 | Hexagon nut | 2 | ④ |
Recommended spare parts:
R = large repair kit
r = small repair kit
- ① See Section 7.1.2.4
- ② 2 pieces for AEB4H 100-IE, AEB4H 200-IE
- ③ 2 pieces for connection piece positions 2 and 4
- ④ 4 pieces for AEB4H 100-IE, AEB4H 200-IE
- ⑤ not required for AEB1E 50 / AEB2E 50 / AEB1N 25 / AEB2N 25 / AEDB1E 75 / AEDB2N 38 / AEB1L 99 / AEB4H 12)
Aftermarket PCM® Progressive Cavity Pumps and Pump Parts
We offer PCM ® Brand I series, ID series and H series replacement aftermarket progressing cavity pumps parts and pumps. Including stator, rotor, coupling rod, universal joint assembly, drive shaft, mechanical seal, mechanical seal casing, packing, packing chamber and pump body, almost all can be provided, except for special pump types.
Parts of lists
011M6F, 075M6F, 1M6F, 2M6F, 3M6F
| Part no. | Description | Quantity |
|---|---|---|
| 1 | STATOR | 1 |
| 11 | PIN | 1 |
| 13 | SEAL | 1 |
| 16/17 | GASKET | 1 |
| 20 | ROTOR | 1 |
| 34 | SHAFT RING | 1 |
| 36 | CTRL SHAFT | 1 |
| 50 | BODY | 1 |
| 54 | PORT | 1 |
| 57 | MS SUPPORT | 1 |
| 88 | SPACER | 1 |
| 90 | SEAL | 2 |
| 102 | WASHER | 4 |
| 102A | WASHER | 4 |
| 104 | SCREW | 4 |
| 104A | SCREW | 4 |
| 107 | NUT | 8 |
| 110 | PLUG | 1 |
| 110A | PLUG | 1 |
| 111 | PLUG SEAL | 1 |
| 227 | WASHER | 4 |
| 242 | WASHER | 2 |
| 250 | SCREW | 4 |
OEM Your Own PC Pump Parts
Advanced Equipment Mature Technology
FAQ – Frequently Asked Questions
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.
Of course, when a problem occurs with your pump, spare parts need to be replaced. Usually the flow rate and pressure decrease, or the pump has abnormal noise, the pump does not rotate, the motor is rotating, and so on. At this time, we need to disassemble, inspect, remove and find the damaged parts of the pump. Then check the drawing to find the corresponding part description and position number.
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 have to consider many factors for this; Common reasons are system problems or wrong pump selection and material selection.
- If there is a problem with the system, the most common one is pump dry grinding;
- The wrong material selection will cause the spare parts to corrode and wear quickly.
- The wrong pump model selection will also cause the spare parts to wear out quickly, or even fail to work in serious cases.
If you need our help to determine the cause of the pump failure, you should provide the following information as far as possible: the fluid delivered by the pump, viscosity, temperature, physical and chemical properties, required flow rate, pressure, inlet conditions and pipe inner diameter.
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.