| Customization: | Available |
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| Structure: | Single End |
| Pressure: | High Pressure Mechanical Seals |
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(1)Features
Stationary bellows
Single seal
Balanced
Independent of direction of rotation
(2)Advantages
For high temperature
High sliding velocities
No elastomer secondary seals
(3)Operating range (see note on page 1)
Shaft diameter: d1 = 16 ... 100 mm (0.64" ... 4"),
(> 100 mm on request)
Externally pressurized:
p1 = 25 bar (363 PSI),
(higher pressure possible, please inquire)
Internally pressurized:
p1 <120 °C (248 °F) 10 bar (145 PSI),
p1 <220 °C (428 °F) 5 bar (72 PSI),
p1 <400 °C (752 °F) 3 bar (44 PSI)
Stationary seat lock necessary.
Temperature: t = -20 ... +400 °C (-4 °F ... +752 °F)
Sliding velocity: vg = 50 m/s (165 ft/s)
(4)Materials
Bellows: Inconel® 718 (M6), Hastelloy® C-276 (M5)
Seal face: Carbon graphite antimony impregnated (A),
Silicon carbide (Q12)
Seat: Silicon carbide (Q1), Special cast CrMo steel (S)
Metal parts: Duplex (G1), Carpenter® 42 (T4),
Hastelloy® C-4 (M)
(5)Recommended applications
Refining technology
Power plant technology
Chemical industry
Hot media
High sliding velocities
Pumps
Special rotating equipment
(6)Item Part no. to DIN 24250 Description
1.1 472 and 481 Seal face and bellows unit
1.2 400.1 Flat gasket
2 475 Seat
(7)Product variant
MFL69
Shaft diameter: d1 = 16 ... 100 mm (0.64" ... 4"),
(> 100 mm on request)
Internally pressurized:
p1 = 16 bar (232 PSI),
(higher pressure possible, please inquire)
Externally pressurized:
p1 = 10 bar (145 PSI),
stationary seat lock necessary.
Temperature: t = -20 °C ... +400 °C (-4 °F ... +752 °F)
Sliding velocity: vg = 50 m/s (165 ft/s)
Dimensions in mm
| d | d1 | d2 | d3 | d4 | d5 | d6 | L | n x mx | t |
| 19 | 16-19 | 20.5 | 29.0 | 30.3 | 25.3 | 45.0 | 33.5 | 4 x M4 | 6.0 |
| 24 | 20-24 | 25.5 | 35.0 | 38.8 | 33.8 | 49.0 | 33.5 | 4 x M4 | 6.0 |
| 30 | 25-30 | 31.5 | 40.0 | 43.6 | 38.6 | 55.0 | 34.5 | 6 x M4 | 6.0 |
| 35 | 31-35 | 36.0 | 45.0 | 45.8 | 40.8 | 59.0 | 33.0 | 6 x M4 | 6.0 |
| 40 | 36-40 | 41.0 | 50.0 | 51.5 | 46.5 | 65.0 | 30.5 | 6 x M4 | 6.0 |
| 45 | 41-45 | 46.0 | 55.0 | 55.2 | 50.2 | 69.0 | 35.5 | 6 x M4 | 6.0 |
| 51 | 46-51 | 52.0 | 63.0 | 64.7 | 59.7 | 76.5 | 40.5 | 6 x M5 | 7.0 |
| 60 | 52-60 | 61.0 | 70.0 | 70.6 | 65.6 | 84.0 | 32.0 | 6 x M5 | 7.0 |
| 70 | 61-70 | 71.0 | 80.0 | 82.8 | 76.8 | 95.0 | 38.0 | 6 x M5 | 7.0 |
| 82 | 71-82 | 83.5 | 95.0 | 98.0 | 92.0 | 112.0 | 41.0 | 6 x M6 | 7.0 |
| 88 | 83-88 | 89.5 | 100.0 | 107.7 | 101.7 | 120.0 | 47.0 | 6 x M6 | 7.0 |
| 100 | 89-100 | 101.0 | 112.0 | 112.7 | 106.7 | 130.0 | 47.0 | 6 x M6 | 7.0 |
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.
Question1: What are the prices of your products?
Answer: For each model, the unit price is listed on the website, but what is displayed on the website is only the average market price. For specific models, you can contact us for further consultation and negotiation.
Question 2: Are you a factory or a trade company?
Answer: We are a factory with top sales for the trade service.
Question 3: 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 services through placing trial orders. Looking forward to the long-term cooperation with you.
Question4: 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.
Question5: Can I try to get a SAMPLE before the order?
Answer: Sure. Our company will provide you with samples for free, but you will have to pay for the international delivery (freight collect payment).
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