Replacement Mechanical Seals for CNP Pumps
Hong Teng supplies aftermarket replacement mechanical seals for selected CNP vertical multistage, horizontal multistage, inline circulation, self-priming, sewage, chemical and industrial pump applications.
Our available range includes replacement seals for selected CNP CDLF, CDMF, CHL, CHLF, CHM, CHMF, TD, SP, ZW, QY and other pump configurations, with different shaft sizes, stationary-seat designs and material options.
Browse the CNP replacement seals currently listed below, or send us the complete pump model, nameplate, old seal photos and dimensions for identification.
Find a CNP Mechanical Seal by Pump Series / Reference
Use the table below as a quick reference for CNP replacement mechanical seals currently available from Hong Teng. Mechanical seal design can vary by pump series, shaft size, stationary-seat geometry and installation length, so the complete pump model and removed seal should always be confirmed before ordering.
| Pump Series / Application | Seal Reference | Size | Seal Type | Action |
|---|---|---|---|---|
| CDLF / CDMF Vertical Multistage Pumps | CDLA | 12 / 16 / 22 mm | Multistage Pump Seal | View Seal |
| CHL / CHLF / CHLKF Horizontal Multistage Pumps | NDA / NDB / CHL | 16 / 20 mm | Horizontal Multistage Seal | View Seal |
| CHM / CHMF Horizontal Multistage Pumps | CHM | 14 / 19 mm | Horizontal Multistage Seal | View Seal |
| TD / Pipeline Pump Applications | TD5 / NG | 40 / 43 / 48 / 55 mm | Inline / Pipeline Pump Seal | View Seal |
| SP Self-Priming Sewage Pumps | SP | 38.1 / 47.6 mm | Sewage Pump Seal | View Seal |
| ZW Self-Priming Pump Applications | WZ / ZW | 25 / 30 / 35 / 40 / 45 / 50 / 55 / 65 mm | Self-Priming Pump Seal | View Seal |
| Chemical / SZ Pump Applications | WB2 / SZ | 30 / 35 / 40 / 45 / 50 / 55 mm | Chemical Pump Seal | View Seal |
| Selected CNP Pump Applications | Three-Hole - Machined Type | Confirm dimensions from drawing or old seal | Machined / Turned Construction | View Machined-Type Seal |
| Selected CNP Pump Applications | Three-Hole - Stamped Type | Confirm dimensions from drawing or old seal | Stamped Construction | View Stamped-Type Seal |
Cannot find your CNP seal in the table? Send us the pump model, nameplate, old seal photos and dimensions for identification →
All CNP Replacement Mechanical Seals
Browse our currently available replacement mechanical seals for selected CNP vertical multistage, horizontal multistage, inline circulation, self-priming, sewage and chemical pump applications.
If the exact CNP seal you need is not listed, send us the complete pump model, pump nameplate, old seal photos and measured dimensions for identification.
Compatibility varies by pump version and seal arrangement. Please confirm the pump model and existing seal before ordering.
CNP Pump Families & Seal Configurations
CNP manufactures different pump families for water supply, boosting, HVAC, industrial processing, wastewater and chemical applications. The mechanical seal arrangement depends on the pump construction, shaft size and operating conditions, so different CNP pump families should not be treated as using one universal seal.
VERTICAL MULTISTAGE
CNP CDM / CDMF / CDLF Series
CNP vertical multistage pumps are widely used for water treatment, boosting, HVAC and industrial liquid transportation. Current CNP CDM/CDMF designs use a cartridge-type mechanical seal, while replacement requirements can vary by pump generation and size.
Current Hong Teng reference: CDLA · 12 / 16 / 22 mm and related configurations
HORIZONTAL MULTISTAGE
CNP CHL / CHLF & CHM / CHMF
CHL, CHLF, CHM and CHMF are horizontal multistage pump families used in water supply, treatment, washing and industrial applications. Seal dimensions and stationary-seat geometry should be confirmed separately for each pump series.
Current Hong Teng references: NDA / NDB / CHL · CHM
INLINE & CIRCULATION
CNP TD / TDG Pumps
CNP TD and TDG pumps are vertical inline circulation pumps used in HVAC, district heating, industrial cooling, water supply and other circulation systems. Replacement seals should be selected from the complete pump size and existing sealing components.
Current Hong Teng reference: TD5 / NG · 40 / 43 / 48 / 55 mm
SELF-PRIMING & INDUSTRIAL
CNP SP / ZW / Chemical Pump Applications
CNP SP and ZW pumps are designed for self-priming and sewage-handling applications, while CNP also produces pump families for chemical and industrial liquids. These applications may require different seal-face and elastomer materials from clean-water multistage pumps.
Current Hong Teng references: SP · WZ / ZW · WB2 / SZ
Why the Exact CNP Pump Series Matters
A CNP vertical multistage pump, horizontal multistage pump, inline pump and self-priming sewage pump can use very different seal structures. Even seals with the same shaft diameter may have different stationary seats, installation lengths and material combinations. Always identify the pump family before comparing the seal.
How to Identify the Correct CNP Mechanical Seal
The most reliable way to identify a CNP replacement mechanical seal is to combine the complete pump model with the removed seal design and measured dimensions.
01 Identify the Complete CNP Pump Model
The most reliable way to identify a CNP replacement mechanical seal is to combine the complete pump model with the removed seal design and measured dimensions.
02 Check the Existing Seal Construction
Compare the rotating component, stationary seat, spring or cartridge arrangement and installation position. Do not assume that seals from two different CNP pump families are interchangeable.
03 Measure the Seal
Measure the shaft or sleeve diameter, stationary-seat outside diameter and thickness, rotating assembly dimensions and free or installed working length.
04 Confirm Materials and Operating Conditions
Record the pumped medium, temperature and existing face and elastomer materials. Material requirements can differ significantly between clean water, sewage and chemical-pump applications.
CNP SEAL IDENTIFICATION
Information to Send Us
For faster identification, provide as much of the following information as possible:
- Complete CNP pump model
- Pump nameplate photo
- Photos of the complete old seal
- Rotating seal components
- Stationary seat
- Shaft or sleeve diameter
- Stationary-seat dimensions
- Seal free / working length
- Pumped medium and temperature
- Required quantity
Mechanical Seal Materials for CNP Pumps
Mechanical seal materials should be selected according to the CNP pump family, pumped medium and operating conditions rather than the pump brand alone. Clean-water multistage pumps, wastewater pumps and chemical applications can require very different face and secondary-seal materials.
Carbon / Silicon Carbide
Carbon and silicon carbide combinations are commonly considered for clean-water, circulation, boosting and general industrial pump applications where suitable lubrication and stable operating conditions are maintained.
Silicon Carbide / Silicon Carbide
Silicon carbide / silicon carbide offers high hardness and wear resistance and can be considered for more demanding water, wastewater or process applications where harder seal faces are required.
EPDM, FKM & PTFE Options
Secondary-seal materials should be selected according to chemical compatibility and temperature. EPDM, FKM and PTFE options can be used across different replacement configurations depending on the pumped liquid.
Match the Material to the Pump Service
Do not choose a CNP replacement mechanical seal only because the dimensions appear to match. Confirm the pump application, pumped medium, temperature, pressure, cleanliness and existing seal materials before selecting the final face and elastomer combination.
- Pump family and application
- Pumped medium
- Operating temperature
- Pressure and operating conditions
- Existing seal-face materials
- Existing elastomer material
Related CNP & Mechanical Seal Guides
Use these guides to compare CNP pump configurations, identify an unknown replacement seal, measure the removed components and select suitable mechanical seal materials.
CNP CDLF and CHL Pump Mechanical Seal Selection Guide
Learn how to distinguish CNP vertical and horizontal multistage pump seals using the complete pump model, old seal and measured dimensions.
Read Guide → IdentificationHow to Identify the Correct Mechanical Seal for Your Pump
Review the pump data, seal construction, dimensions and photographs needed to identify a replacement mechanical seal more reliably.
Read Guide → MeasurementHow to Measure a Mechanical Seal
Learn how to measure the shaft diameter, rotating assembly, stationary seat, free length and working length before ordering.
Read Guide → Material SelectionMechanical Seal Material Selection Guide
Compare seal-face, elastomer and metal materials according to fluid compatibility, temperature, pressure and operating conditions.
Read Guide →Frequently Asked Questions About CNP Mechanical Seals
Find answers to common questions about identifying, selecting and replacing mechanical seals for CNP pumps.
How do I identify the correct mechanical seal for a CNP pump?
Start with the complete CNP pump model and pump family, then compare the removed rotating seal, stationary seat, shaft diameter and working length. Material requirements should also be confirmed according to the pumped medium and operating conditions.
Do CNP CDLF and CHL pumps use the same mechanical seal?
Not necessarily. CDLF-type vertical multistage pumps and CHL horizontal multistage pumps use different pump constructions, so stationary-seat geometry, installation length and seal configuration can differ even when two seals have a similar shaft diameter or appearance.
Which replacement seals are available for CNP CHL and CHLF pumps?
Our current range includes NDA / NDB / CHL replacement mechanical seals in selected 16 mm and 20 mm configurations for CHL, CHLF and CHLKF applications. Final compatibility should be confirmed from the complete pump model and existing seal.
Do you supply mechanical seals for CNP SP and ZW self-priming pumps?
Yes. Our current range includes selected SP replacement seals in 38.1 mm and 47.6 mm configurations and WZ / ZW replacement seals in several sizes from 25 mm to 65 mm. The exact pump and seal dimensions should still be confirmed before ordering.
Can you identify a CNP mechanical seal from photos and dimensions?
In many cases, yes. Send the complete pump nameplate, clear photographs of the rotating and stationary seal components, shaft or sleeve diameter, stationary-seat dimensions and seal working length for comparison.
Are these original CNP mechanical seals?
No. The products shown on this page are aftermarket replacement mechanical seals independently supplied by Hong Teng. CNP and pump-series names or reference numbers are used only to identify compatible applications.
Need Help Finding a CNP Mechanical Seal?
Send us your CNP pump model, pump nameplate, old seal photos and dimensions. We can help compare the available replacement options before quotation.
CNP and other manufacturer names, pump-series names and reference numbers are used only for compatibility identification. Replacement products are independently supplied by Hong Teng.
