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2026-10-29 
Industry News 
As a BN series progressive cavity pump supplier, Jiangsu Sharp Pump Co., Ltd. supplies an interchangeable SEEPEX BN alternative engineered for direct replacement in existing installations. Based in Jingjiang, China, we build the BN series around standardized flange/thread connection sizes and shaft dimensions, so the pump drops into the current pipework and drive without rework. The design is intended for dewatered sludge, high-viscosity chemicals, crude oil and other fluids that require low-shear, non-pulsating transfer.
Interchangeable Design and Application Fit
The BN series is not a generic positive-displacement pump. We machine the rotor and stator geometry to match the original performance curve, so flow stability and pressure response remain consistent after replacement. Standardized connection dimensions cover both flange and threaded interfaces, and the shaft dimensions are prepared for direct coupling to the existing drive.
- Drop-in replacement with standardized flange/thread connections and shaft dimensions
- Precision-machined rotors in SS304/SS316 and high-elasticity stators in NBR/EPDM/Viton
- Suitable for fluids with high solid content or extreme viscosities
- Low-shear, non-pulsating flow for sludge, chemicals and crude oil
Rotor, Stator and Material Selection
We select rotor and stator materials around the fluid, temperature and abrasion conditions. Rotor and rotating shaft options include 304SS, 316LSS and duplex 2205. Stator elastomers include NBR, EPDM, FKM, HNBR, PTFE and silicone rubber, each matched to chemical compatibility and temperature range.
- Rotor metals: 304SS, 316LSS, duplex 2205
- Stator elastomers: NBR, EPDM, FKM, HNBR, PTFE, silicone rubber
- Material selection based on fluid name, temperature and solids content
- Custom material requests can be quoted from drawings or samples
Configuration and Integration
Each BN series pump is configured from the working point, not from a fixed catalogue line. We use the required flow rate, discharge pressure, fluid name and working temperature to select the stage count, rotor/stator pairing, seal arrangement and drive interface. Optional configurations include temperature transmitters, control cabinets, customized shafts and mobile bases for process or test-stand installations.
- Flow rate and discharge pressure define stage count and rotor/stator geometry
- Fluid name and temperature drive elastomer and metal selection
- Shaft seal options include packing, single and double mechanical seals, and cartridge mechanical seals
- Drive interface prepared for direct coupling or baseplate-mounted motor
Spare Parts and MRO Support
Because the BN series is an interchangeable platform, we keep the wear path serviceable. We supply compatible Rotors for BN Series, Stators for BN series, coupling rods and mechanical seals. Most spare parts are held in stock and can be dispatched within three days; complete pumps are typically produced in two to four weeks depending on model and configuration.
Quality Control and Acceptance
Every assembled pump is water-tested after assembly, and we provide a test report with the delivery. Material certificates are available for rotor, stator and shaft materials. Our production follows ISO-certified quality management, with in-house machining of rotors, stators, shafts and coupling rods to control fit and repeatability.
- Water test after assembly with test report
- Material certificates available on request
- ISO-certified quality management system
- In-house machining of rotor, stator, shaft and coupling rod
Installation, Commissioning and Maintenance
The BN series is designed for direct replacement, so installation follows the existing pipework and drive alignment. We provide disassembly and assembly guidance to reduce installation errors, and paid on-site installation support is available for project needs. The standard warranty is 12 months for the pump, excluding quick-wearing parts such as rotor, stator and mechanical seal.
- Drop-in connection dimensions reduce rework
- Disassembly/assembly guidance and training materials
- Paid on-site installation service available
- Standard 12-month pump warranty; extended warranty options available
Information We Use to Configure Your Solution
To prepare an accurate BN series proposal, we work from the operating point and fluid data. The table below shows the inputs we use and how each one affects the configuration.
| Project Input | What It Determines |
|---|---|
| Flow rate and discharge pressure | Stage count, rotor/stator geometry and drive sizing |
| Fluid name and working temperature | Rotor metal, stator elastomer and seal material selection |
| Solid content and viscosity | Rotor/stator clearance, feed conditions and wear allowance |
| Connection standard and shaft dimensions | Flange/thread interface and direct coupling fit |
| Drive and control interface | Motor coupling, baseplate, control cabinet or temperature transmitter options |
Related Progressive Cavity Pump Range
For applications outside the BN series envelope, we also supply the NM series progressive cavity pump for general industrial transfer, vertical configurations for limited footprint installations, and open hopper pumps with auger feed for extremely viscous or non-flowing media. The BN series remains the preferred choice when the existing installation is built around SEEPEX BN dimensions and the goal is a direct, low-risk replacement.
Frequently Asked Questions
Is the BN series a direct replacement for SEEPEX BN pumps?
Yes. We machine connection sizes and shaft dimensions to match the original equipment, so the pump installs without pipework or drive modification.
What materials are available for rotor and stator?
Rotor and rotating shaft options include 304SS, 316LSS and duplex 2205. Stator options include NBR, EPDM, FKM, HNBR, PTFE and silicone rubber, selected by fluid and temperature.
Can you customize a rotor or stator from our sample or drawing?
Yes. Send the sample or drawing, and we will design and produce a matching component. If no sample is available, we will specify the critical dimensions needed.
What test and documentation do you provide?
Each pump is water-tested after assembly and supplied with a test report. Material certificates are available for rotor, stator and shaft materials.
What is the delivery time?
Complete BN series pumps usually take 2-4 weeks depending on model. Most spare parts are in stock and can be dispatched within 3 days.
What warranty applies?
The standard warranty is 12 months for the pump, excluding quick-wearing parts such as rotor, stator and mechanical seal. Extended warranty options are available.
