Product
GLF-CH-12MM 12 mm Mechanical Seal for Grundfos CH 2/4 Pumps
| Product Reference | GLF-CH-12MM |
|---|---|
| Supplier / Brand | Hong Teng |
| Place of Origin | China |
| Compatible Equipment | Selected Grundfos CH 2 / CH 4 pump configurations |
| Nominal Size | 12 mm; confirm the actual shaft and mating dimensions |
| Seal Arrangement | Spring-loaded seal component with a separate stationary seat |
| Application | Pump servicing and replacement with verified dimensional compatibility |
| Enquiry Information | Full CH pump designation, seal photos, seat dimensions and working length |
Product Details
| Model / Reference | GLF-CH-12MM |
|---|---|
| Nominal Shaft Size | 12 mm, as listed for this product; confirm the existing shaft or sleeve. |
| Pump Application | Selected Grundfos CH 2 and CH 4 configurations; the complete pump version must be checked. |
| Component Identification | Product photographs show a spring-loaded component and a separate ring-shaped stationary seat. |
| Stationary Seat | Measure outside diameter, inside diameter and thickness, including the secondary-seal fit where applicable. |
| Rotating Component | Compare the shaft fit, body outside diameter, spring-end arrangement and complete component profile. |
| Working Length | Confirm the installed axial dimension; do not substitute an uncompressed measurement without checking the drawing. |
| Face and Secondary-Seal Materials | Specify the required configuration for the operating liquid and duty. The colour of a secondary seal does not confirm its material. |
| Operating Limits | Confirm temperature, pressure and speed for the quoted material combination and installation. |
| Order Scope | State whether a complete replacement set or a particular component is required; retain the old parts for comparison. |
Product Description
The GLF-CH-12MM is a 12 mm replacement mechanical seal listed for selected Grundfos CH 2 / CH 4 pumps. Its photographed component layout includes a spring-loaded part and a separate stationary seat, so both parts need to be considered during replacement matching.
A nominal 12 mm fit does not by itself complete the selection. Please compare the stationary-seat diameter and thickness, the rotating component and the installed length. Keep the full CH pump designation and product number with the measurements to distinguish the specific equipment configuration.
Refer to the Grundfos pump replacement selection guide for the identity information to collect. For the stationary seat and axial measurements, use the mechanical seal measurement guide. Other designs in the Grundfos replacement mechanical seal range should be treated as separate options, not direct substitutes based on appearance.
Grundfos and CH model references identify compatible applications only. The replacement is independently supplied by Hong Teng and is not represented as an original Grundfos product.
Application
Suitable Replacement Enquiries
- Service and repair of selected Grundfos CH 2 / CH 4 pumps whose original sealing arrangement matches this replacement.
- Maintenance enquiries where the rotating component, separate stationary seat and installed dimensions can be compared.
How to Confirm the Correct Configuration
- Send the complete pump nameplate, including the product number and full CH model designation.
- Photograph the spring-loaded component and stationary seat separately; provide the 12 mm shaft fit and mating dimensions.
- Confirm the operating liquid, working length, required materials and quantity before quotation approval.
Before ordering: Send the pump details and seal photographs to Hong Teng for confirmation of the required configuration and supply scope.
Product Questions
Does 12 mm alone confirm that this seal fits my CH pump?
No. Match the exact CH version, stationary seat, component profile and installed working length as well.
Can I order a new rotating part without checking the stationary seat?
Provide information on both sides of the seal. The quotation must confirm which parts are supplied and whether they form the required matching assembly.
Can the elastomer be identified by its green colour in the photo?
No. Specify or verify the material separately rather than using colour as the purchasing specification.
Product Photos




Company Profile
Dongguan Hongteng Seals Co., Ltd. Company was established in 1996. The company has passed the GB/T19001-2016 idt ISO9001:2015 quality management system certification. The company has world-renowned pump mechanical seals, axe mechanical seals, fluid mechanical seals, metal bellows mechanical seals, container mechanical seals, rubber bellows mechanical seals, O-ring seals, PTFE mechanical seals, stainless steel oil seals, skeleton oil seals, hydraulic oil seals, automotive water seals and various mechanical seal materials, hard alloys, silicon carbide, carbon graphite, alumina, etc. There are Guangzhou Port, Shenzhen Port, and Foshan Port in the surrounding area, with developed and efficient logistics. The company has a stock warehouse of over 2000 square meters, which can efficiently and quickly deliver goods.
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Customer Reviews
frequently asked questions
01. Q: Are you a factory or a trader?
A: We are a production factory and also sell on our own
02. Q: Where is your factory located?
A: Our factory is located in Dongguan City, and the nearest ports are Guangzhou Port and Shenzhen Port. Other ports can also be selected according to customer needs
03. Q: What is your delivery time in days?
A: For products in stock, we can ship immediately when receive the payment; For other projects, we need 10-25 days for mass production
04. Q: Do you provide free samples?
A: We usually do not provide free samples, and the sample fee can be deducted after the second order
05. Question: What is the most commonly used mode of transportation
A: The weight and size of mechanical seals are relatively small, and air freight, sea freight, and express delivery are usually the preferred transportation methods for customers.
06. Q:What payment methods do you accept?
A: For products in stock, 100% advance payment is required and immediate shipment will be made upon receipt of payment. For customized products, a 30% advance payment and a 70% payment must be made before the order is shipped. We accept T/T, Western Union, and also welcome customers to make payments through Alibaba
07. Q: Can you provide me with customized production
A: Yes, we can customize products and welcome OEM