| Customization: | Available |
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| Structure: | Single End |
| Pressure: | High Pressure Mechanical Seals |
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(1)Features
•Cartridge
•Balanced
•Independent of direction of rotation
•Stationary multiple springs
•Springs and pin located on the atmospheric side
(2)Operating range (see note on page 1)
MA290/MA390:
Pressure: p = ... 16 bar (232 PSI)
Temperature: t = -20 °C ... +160 °C (-4 °F ... +320 °F)
(oil), 0 °C ... 60 °C (32 °F ... 140 °F) (water)
Sliding velocity: vg = max. 20 m/s (66 ft/s) Viscosity: 0.5 Pa•s
Solids content: 0.3 %
MA291/MA391:
Pressure: p = ... 10 bar (145 PSI)
Temperature: t = -20 °C ... +160 °C (-4 °F ... +320 °F)
(oil), 0 °C ... 60 °C (32 °F ... 140 °F) (water)
Sliding velocity: vg = max. 20 m/s (66 ft/s)
Viscosity: 3 Pa•s
Solids content: 10 %
(3)Materials
Seal face (MA290, MA390): High density carbon graphite
Seal face (MA291, MA391): Silicon carbide (Q1)
Seat (MA290/291, MA390/391): Silicon carbide (Q1)
Metal parts: 1.4401 (G)
Secondary seals: FKM (V)
(4) Standards and approvals
•EN 12756
•ISO 3096
(5)Recommended applications
•Water and waste water technology
•Chemical industry
•Petrochemical industry
•Pharmaceutical industry
•Food and beverage industry
•Universally applicable
•Centrifugal pumps
•Eccentric screw pumps
•Process pumps
(6)Item Description
1 Seal face
2 O-Ring
3 Spring
4 Seat
5 O-Ring
6 Drive collar
7 O-Ring
8 Set screw
9 Seal cover
10 Gasket
11 Assembly fixture
12 HSH cap screw
(7)Product variants
MA390 (MA391)
Axially downsized type of MA290 (MA291).
| d | d1min. | d1max. | d2 | d3 | L1 | L2 | L3 |
| 20 | 30.0 | 51.0 | 58.0 | 104.0 | 42.0 | 60.0 | 12.0 |
| 24 | 34.0 | 51.0 | 58.0 | 104.0 | 42.0 | 60.0 | 12.0 |
| 25 | 35.0 | 51.0 | 58.0 | 104.0 | 42.0 | 60.0 | 12.0 |
| 28 | 38.0 | 54.0 | 63.0 | 108.0 | 42.0 | 65.0 | 12.0 |
| 30 | 40.0 | 56.0 | 63.0 | 108.0 | 42.0 | 65.0 | 12.0 |
| 32 | 42.0 | 56.0 | 63.0 | 108.0 | 42.0 | 65.0 | 12.0 |
| 33 | 43.0 | 66.0 | 73.0 | 118.0 | 42.0 | 75.0 | 14.0 |
| 35 | 45.0 | 66.0 | 73.0 | 118.0 | 42.0 | 75.0 | 14.0 |
| 38 | 48.0 | 66.0 | 73.0 | 118.0 | 42.0 | 75.0 | 14.0 |
| 40 | 50.0 | 66.0 | 73.0 | 118.0 | 42.0 | 75.0 | 14.0 |
| 43 | 53.0 | 71.0 | 78.0 | 128.0 | 42.0 | 80.0 | 14.0 |
| 45 | 55.0 | 71.0 | 78.0 | 128.0 | 42.0 | 80.0 | 14.0 |
| 48 | 58.0 | 81.0 | 88.0 | 138.0 | 44.0 | 90.0 | 14.0 |
| 50 | 60.0 | 81.0 | 88.0 | 138.0 | 44.0 | 90.0 | 14.0 |
| 53 | 63.0 | 81.0 | 88.0 | 138.0 | 44.0 | 90.0 | 14.0 |
| 55 | 65.0 | 81.0 | 88.0 | 138.0 | 44.0 | 90.0 | 14.0 |
| 58 | 68.0 | 96.0 | 103.0 | 164.0 | 46.0 | 105.0 | 18.0 |
| 60 | 70.0 | 96.0 | 103.0 | 164.0 | 46.0 | 105.0 | 18.0 |
| 63 | 73.0 | 96.0 | 103.0 | 164.0 | 46.0 | 105.0 | 18.0 |
| 65 | 75.0 | 96.0 | 103.0 | 164.0 | 46.0 | 105.0 | 18.0 |
| 70 | 80.0 | 102.0 | 109.0 | 178.0 | 46.0 | 111.0 | 18.0 |
| 75 | 85.0 | 114.0 | 121.0 | 193.0 | 49.0 | 123.0 | 18.0 |
| 80 | 90.0 | 114.0 | 121.0 | 193.0 | 49.0 | 123.0 | 18.0 |
| 85 | 95.0 | 124.0 | 131.0 | 208.0 | 49.0 | 133.0 | 20.0 |
| 90 | 100.0 | 124.0 | 131.0 | 208.0 | 49.0 | 133.0 | 20.0 |
| 95 | 105.0 | 134.0 | 141.0 | 218.0 | 49.0 | 143.0 | 20.0 |
| 100 | 110.0 | 134.0 | 141.0 | 218.0 | 49.0 | 143.0 | 20.0 |
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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