| Availability: | |
|---|---|
| Quantity: | |
687
8484200090
Key attributes
model number | 687 |
place of origin | Zhejiang, China |
Brand Name | |
Standard or Nonstandard | Standard |
Website |
Packaging and delivery
Selling Units | Single item |
Single package size | 38X38X32 cm |
Single gross weight | 20.000 KG |
Supply capacity
Supply Ability:10000 sets per Month
Product Description
Mechanical Seal Metal Bellows Seal 680 replace John Crane 680
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.
High Quality Multiple Spring O-ring Mechanical Seals
Description:
Replacement to:
Replacing the mechanical seal of John Crane 680
1. Operational Conditions:
Temperature: -20ºC to +180ºC
Pressure: ≤2.5MPa
Speed: ≤15m/s
2. Materials:
Stationary Ring: Ceramic, Silicon Carbide, TC
Rotary Ring: Carbon, Silicon Carbide
Secondary Seal: NBR, EPDM, Vion, PTFE
Spring and Metal Parts: Steel
3. Seat Type:
4. Applications: Clean water, sewage water, oil and other moderately corrosive fluids
Operational Conditions: | |
Temperature: | -20ºCto+180ºC |
Pressure: | ≤2.5MPa |
Speed: | ≤15m/s |
Materials: | |
Stationary Ring: | V1,Q1,Q2,U2 |
Rotary Ring: | B,A,Q1,Q2 |
Secondary Seal: | P,E,V,M1,M2 |
Spring and Metal Parts: | F,G,M |
Seat Types: | |
Standard: | |
Alternative: | |
Applications: | Clean water, sewage water, Oil and other moderately corrosive fluids |

Detailed Photos
Production Factory
Our Advantages
We have large stock, so our delivery is very fast.
For example,if products are standarded, the delivery time is one week.
Our company and factory addrss: Ningbo City, Zhejiang Province,China.
Our city has a large port and an airport, so its transportation is very convenient.
Packaging & Shipping
FAQ
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: What is the minimum order quantity for each order?
Answer: For products of regular models, the minimum order quantity is at least five. We welcome you to test the quality of our products and our services through small orders and look forward to long-term cooperation with you next.
Question 3: What is your company's service tenet?
Answer: Quality first, service upmost. We promises that if there is any problem with the quality of the product or if the product is damaged during the transportation, our company will be responsible for compensation, regardless of the ordder turnover value.
Question 4: What are the prices of your products?
Answer: For each model, the unit price is listed on the website, but what is indicated on the website is only the average market price. For specific models, you can contact us for price consultation and negotiation.
Question 5: Can I try to get a SAMPLE before the order?
Answer: Sure. Our company provides you with samples for free, but you will have to pay for the international delivery (freight collect payment).
Key attributes
model number | 687 |
place of origin | Zhejiang, China |
Brand Name | |
Standard or Nonstandard | Standard |
Website |
Packaging and delivery
Selling Units | Single item |
Single package size | 38X38X32 cm |
Single gross weight | 20.000 KG |
Supply capacity
Supply Ability:10000 sets per Month
Product Description
Mechanical Seal Metal Bellows Seal 680 replace John Crane 680
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.
High Quality Multiple Spring O-ring Mechanical Seals
Description:
Replacement to:
Replacing the mechanical seal of John Crane 680
1. Operational Conditions:
Temperature: -20ºC to +180ºC
Pressure: ≤2.5MPa
Speed: ≤15m/s
2. Materials:
Stationary Ring: Ceramic, Silicon Carbide, TC
Rotary Ring: Carbon, Silicon Carbide
Secondary Seal: NBR, EPDM, Vion, PTFE
Spring and Metal Parts: Steel
3. Seat Type:
4. Applications: Clean water, sewage water, oil and other moderately corrosive fluids
Operational Conditions: | |
Temperature: | -20ºCto+180ºC |
Pressure: | ≤2.5MPa |
Speed: | ≤15m/s |
Materials: | |
Stationary Ring: | V1,Q1,Q2,U2 |
Rotary Ring: | B,A,Q1,Q2 |
Secondary Seal: | P,E,V,M1,M2 |
Spring and Metal Parts: | F,G,M |
Seat Types: | |
Standard: | |
Alternative: | |
Applications: | Clean water, sewage water, Oil and other moderately corrosive fluids |

Detailed Photos
Production Factory
Our Advantages
We have large stock, so our delivery is very fast.
For example,if products are standarded, the delivery time is one week.
Our company and factory addrss: Ningbo City, Zhejiang Province,China.
Our city has a large port and an airport, so its transportation is very convenient.
Packaging & Shipping
FAQ
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: What is the minimum order quantity for each order?
Answer: For products of regular models, the minimum order quantity is at least five. We welcome you to test the quality of our products and our services through small orders and look forward to long-term cooperation with you next.
Question 3: What is your company's service tenet?
Answer: Quality first, service upmost. We promises that if there is any problem with the quality of the product or if the product is damaged during the transportation, our company will be responsible for compensation, regardless of the ordder turnover value.
Question 4: What are the prices of your products?
Answer: For each model, the unit price is listed on the website, but what is indicated on the website is only the average market price. For specific models, you can contact us for price consultation and negotiation.
Question 5: Can I try to get a SAMPLE before the order?
Answer: Sure. Our company provides you with samples for free, but you will have to pay for the international delivery (freight collect payment).