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Steel Metal Bellow Mechanical Seal For John Crane 680

Minimum Order Quantity : 10PC Price : Negotiated
Packaging Details : box as requirement Delivery Time : 20-30DAYS
Payment Terms : T/T, Western Union, L/C Supply Ability : 10000PC/Month
Place of Origin: MADE IN CHINA Brand Name: JR
Certification: iso9001 Model Number: MFL85N(JR685)

Detail Information

Material: SIC SIC VITON Function: For Oil Pump, Water Pump
Transport Package: Box HS Code: 848420090
Certificate: ISO9001 Type: Burgmann 687mechanical Seal
Standard Or Nonstand: Standard Size: 16mm To 100 Mm
Specification: Burgmann 687 Mechanical Seal Product Name: Metal Bellow Mechanical Seal
High Light:

Burgmann 687 Mechanical Seal


John Crane 680 Mechanical Shaft Seal

Product Description

Mechanical Shaft Seal 687 Metal Bellow Mechanical Seal Cartridge Seal For John Crane 680


Operational Conditions:

  1. Mechanical seal-multiple spring which are availble in a wide varietyh of elastomers for handing practically every industril fluid. All components are held togther by a snap ring in a unized construction design and can be repaired easily on-site.
  2. 687 Mechanical Seal
  3. For big compressors and industrial pumps
  4. Replacing the mechanical seal of John Crane 680
  5. Size: 14 -100 mm / 0.55"-3.94"
  6. Temperature:-20 °C ...+220 °C
  7. Pressure: 16 bar
  8. Sliding velocity: 20 m/s
  9. Axial movement: ± 0.5 mm


  • Stationary Ring:TC, Silicon Carbide
    Rotary Ring:Carbon ,Silicon Carbide,TC
    Secondary Seal:NBR,EPDM,Viton
    Spring and Metal Parts:Steel

Performance Capabilities

-20℃ to 200℃, dependent on the elastomer
Up to 21 bar
Up to 23 m/s
End play/axial float allowance
14mm to 100mm
Carbon, SiC, TC
Ceramic, SiC, TC
SS304, SS316
Metal parts
SS304, SS316
Idividual Packing
Using foam and plastic paper wrapped, then put one piece of seal in one box,finally put in standard export carton.
  • High Quality Multiple Spring O-ring Mechanical Seals
  • 1,For extreme temperature ranges
  • 2,No dynamically loaded O-Ring
  • 3,Very good self cleaning effect
  • 4,Suitable for low-end sterile application

Steel Metal Bellow Mechanical Seal For John Crane 680 0


We are engaged in manufacture and installation exporting and wholesaling quality range of Industrial Seal, Single Spring Seal, Balance and Unbalance Spring Seal, External Mounted Seal, PTFE Bellow External Mounted Seal, Catridge Balance Seal, Multiple Spring Balance Seal, Dry Running Reverse Balance Seal, Agitator Double Acting Unbalance Seal, Single Conical Helical Spring, Rubber Bellow Seal, Multi Spring Seal, Metal Bellow Seal, Elastomer Bellow Seal, Conical Spring Seal, Air Condition Compressor Seal, Auto Cooling Seal, Metallic Bellow Seal,


All ranges of mechanical seals for Flygt Pumps, Grundfos Pumps, Pumps, APV Pumps, Grindes Pumps, Fristam, ABS, Alleeiler, EMU, GEA

Tunchenhagen, Godwin, Hidrostal, Hilge, Johnson, Lowara, Waukesha, Vogelsang Pumps etc.


At the meantime, we could manufacture seals according to your sample or drawing, and design as your request



Question 1: Are you a factory or a trade company?
Answer: We are a factory and have our top sales for the trade service.

Question 2: Can I try to get a SAMPLE before the order?
Answer: Sure. You can ask for the samples. Usually they're free.


Question 3: Where is your factory located? How can I visit there?
Answer: Our factory is located in Ningbo, China. You can fly to Ningbo or Shanghai airport directly. All our clients, from home or abroad, are warmly welcome to visit us!


Question 4: How does your factory do regarding quality control?
Answer: Quality is priority. We always attach great importance to quality controlling from the very beginning to the very end. Our factory has gained ISO9001 authentication.


Question 5: How about the lead time?
Answer: Within10-20 days after getting the prepayment.


Question 6: How can we pay?
Answer: For small sample shipping cost, you can pay either by paypal or by T/T. And by T/T at sight for large amount of the order.


Question 7: If OEM available?
Answer: Yes, we provide all of our products OEM /ODM service.


Question 8: If I can buy pumps or pump parts from your company?
Answer: Yes , we also provide pumps and pump parts, such as Lobe pumps, Compound & homogeneous pumps, Homogeneous & emulsification pumps and so on

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