Product
680 Replacement Metal Bellows Mechanical Seal for John Crane
| Seal Model | 680 |
|---|---|
| Replacement Reference | John Crane seal applications; verify the complete seal reference |
| Seal Construction | Metal bellows mechanical seal |
| Supplier | Hong Teng |
| Identification Focus | Bellows assembly, mounting details and separate seat profile |
| Size Information | Match the existing installation drawing and measured dimensions |
Product Details
| Product Name | 680 Replacement Metal Bellows Mechanical Seal for John Crane |
|---|---|
| Supplier | Hong Teng |
| Model / Reference | 680 |
| Seal Construction | Metal bellows assembly with a separate mating ring, as illustrated |
| Reference Confirmation | Use the seal marking or drawing; do not identify the model from a website address |
| Assembly Check | Compare the housing, bellows section, mounting details and complete seat |
| Shaft / Sleeve Diameter | Confirm the actual required size and units |
| Axial Fit | Provide the required working length and the available installation space |
| Stationary Seat | Check the outside diameter, thickness, locating profile and secondary seal |
| Materials | Confirm face pairing, bellows metal and secondary sealing materials for the duty |
| Service Data | Submit the pumped medium, operating temperature, pressure and shaft speed |
| Supply Scope | Specify the complete assembly or required replacement components in the enquiry |
Product Description
The 680 replacement metal bellows mechanical seal is listed separately from the 609 model. Its product reference is 680, and selection should follow the existing seal marking, component arrangement and installation drawing rather than the wording of a legacy website address.
The reference photographs show the bellows unit beside a separate mating ring from several angles. Include comparable views of the old assembly and the ring mounting profile when requesting a replacement. These views help identify details that may not be visible in a single assembled photograph.
Provide the shaft or sleeve diameter, stationary-seat dimensions and the specified axial working length. Material selection and operating limits must then be confirmed for the actual liquid and operating conditions; neither a similar housing nor a matching model number is enough to establish the complete specification.
To compare other designs, view our metal bellows mechanical seal range. For an existing 609 reference, consult the separate 609 replacement seal page. Our guide to identifying the correct mechanical seal explains the information needed before the final selection.
John Crane is a reference brand for replacement identification. This product is independently supplied by Hong Teng and is not represented as an original John Crane product. Final compatibility depends on the confirmed dimensions, materials and installation.
Application
Applications
- Replacement projects where the installed seal has been identified as a compatible 680 reference.
- Pump servicing that requires comparison of the bellows unit and its stationary-seat arrangement.
- Sample- or drawing-based replacement for a verified installation and material configuration.
How to Confirm the Correct Replacement
- Confirm the 680 reference from the installed seal, drawing or maintenance record.
- Supply front, side and mounting-end photos of the bellows unit, plus both sides of the separate seat.
- Measure the shaft or sleeve diameter, seat fit and required working length.
- Send process conditions and list which components must be included in the quotation.
Selection Questions
Is this the same product as the 609 seal?
The catalogue identifies this product as 680. Treat 609 and 680 as separate references until the actual components and installation dimensions have been checked.
Does a metal bellows design confirm a high-temperature rating?
No numerical rating is specified here. The supplied metal, seal faces and secondary seals must be checked against the operating duty.
Send your seal reference, photos and dimensions for a quotation.
Product Reference Images
Reference photographs assist identification. Confirm the exact supplied parts and specification with the quotation; photographs do not establish material grades or dimensional tolerances.
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.
Production of Workshop
Exhibiton
Packing And Shipping
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
