Mechanical Seal Ma390 Ma391 Ma290 Eagle Bgm Cartridge Seals for Water Pump
MA290 / MA390 EAGLE BGM Cartridge Seal
Double end, multiple springs, balanced, independent rotary direction, still structure, clamp transmission and cartridge seal.
The compensation components are assembled into the flange and the elastomers protects the springs from the mediums to make sure the springs will not be jammed. Multiple springs make the loads on the seal faces balanced.
The second end seal at the sealant side accomplish the second sealing and prevent the leakage of the mediums and sealants.
The sleeve are supported by the elastomers on the shaft and there is no axial movement and no damage to the shaft.
The seal faces are close to the rotor and have high cooling and lubrication efficiency.
The special design of this seal can work with counter pressure and there are diversion trenches inside the flange so that the cooling effects are evenly distributed.
This seal has to work with flush system and the sealant pressure should be 0.1 - 0.3 MPa and flow rate should be 3 - 8 L per minute.
Mechanical seal Eagle BGM
MA390 - MA391
Operating range Mechanical seal MA390 - MA391
MA390:
Pressure: p = … 20 bar (290 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 %
MA391:
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: 3 Pa·s
Solids content: 10 %
Table of Mechanical seal descriptions MA390 - MA391
| Item |
Description |
| 1 |
Seal face |
| 2, 5, 7 |
O-Ring |
| 3 |
Spring |
| 4 |
Seat |
| 6 |
Drive collar |
| 8 |
Set screw |
| 9 |
Seal cover |
| 10 |
Gasket |
| 11 |
Assembly fixture |
| 12 |
HSH cap screw |
Features Seal MA390 - MA391
- Cartridge
- Balanced
- Independent of direction of rotation
- Stationary multiple springs
- Springs and pin located on the atmospheric side
Advantages mechanical seal MA390 - MA391
- Ultra-thin compact design -
the total length including the seal cover is only 33 mm
- Easy installing on the pumps without modifying the stuffing box
- Excellent followability due to no influence from run-out, squareness or vibration of the shaft
- Mounted outside the stuffing box for providing excellent air cooling performance
- Un-wetted springs and knock pins for protecting from lockout by liquid
Materials Seal MA390 - MA391
- Seal face (MA390): High density carbon graphite
- Seal face (MA391): Silicon carbide (Q1)
- Seat (MA390/391): Silicon carbide (Q1)
- Metal parts: CrNiMo steel (G)
- Secondary seals: FKM (V)
Recommended applications seal MA390 - MA391
- Petrochemical industry
- Chemical industry
- Pharmaceutical industry
- Pulp and paper industry
- Water and waste water technology
- Food and beverage industry
- Universally applicable
- Centrifugal pumps
- Eccentric screw pumps
- Process pumps
| MA290/MA390 dimensions(mm) |
| d |
d1min |
d1max |
d2 |
d3 |
l1 |
l2 |
l3 |
| 20 |
30 |
51 |
58 |
104 |
42 |
60 |
12 |
| 24 |
34 |
51 |
58 |
104 |
42 |
60 |
12 |
| 25 |
35 |
51 |
58 |
104 |
42 |
60 |
12 |
| 28 |
38 |
54 |
63 |
108 |
42 |
65 |
12 |
| 30 |
40 |
56 |
63 |
108 |
42 |
65 |
12 |
| 32 |
42 |
56 |
63 |
108 |
42 |
65 |
12 |
| 33 |
43 |
66 |
73 |
118 |
42 |
75 |
14 |
| 35 |
45 |
66 |
73 |
118 |
42 |
75 |
14 |
| 38 |
48 |
66 |
73 |
118 |
42 |
75 |
14 |
| 40 |
50 |
66 |
73 |
118 |
42 |
75 |
14 |
| 43 |
53 |
71 |
78 |
128 |
42 |
80 |
14 |
| 45 |
55 |
71 |
78 |
128 |
42 |
80 |
14 |
| 48 |
58 |
81 |
88 |
138 |
44 |
90 |
14 |
| 50 |
60 |
81 |
88 |
138 |
44 |
90 |
14 |
| 53 |
63 |
81 |
88 |
138 |
44 |
90 |
14 |
| 55 |
65 |
81 |
88 |
138 |
44 |
90 |
14 |
| 58 |
68 |
96 |
103 |
164 |
46 |
105 |
18 |
| 60 |
70 |
96 |
103 |
164 |
46 |
105 |
18 |
| 63 |
73 |
96 |
103 |
164 |
46 |
105 |
18 |
| 65 |
75 |
96 |
103 |
164 |
46 |
105 |
18 |
| 70 |
80 |
102 |
109 |
178 |
46 |
111 |
18 |
| 75 |
85 |
114 |
121 |
193 |
49 |
123 |
18 |
| 80 |
90 |
114 |
121 |
193 |
49 |
123 |
18 |
| 85 |
95 |
124 |
131 |
208 |
49 |
133 |
20 |
| 90 |
100 |
124 |
131 |
208 |
49 |
133 |
20 |
| 95 |
105 |
134 |
141 |
218 |
49 |
143 |
20 |
| 100 |
110 |
134 |
141 |
218 |
49 |
143 |
20 |
We offer products and services to a wide range of mechanical seal users across the nation. We supply electric motor and pump repair shops, HVAC contractors, municipalities, utility companies (electric, power and water) and a variety of other distributors.Our seal products have been widely used in different sorts of pumps, including but not limited to chemical pumps, centrifugal pumps, high-temperature oil pumps, clean water pumps, circulating pumps, vacuum pumps, sewage pumps and slurry pumps. Beside for pumps, our seals also work with reaction kettles, submerged motors, compressors, blowers, paper-making equipment, sewage treatment equipment and other rotating machines.
As Follows:
We are always committed to the imported mechanical seals localization and have accumulated a wealth of experience .
Our product range includes Component Seals, Metal Bellow Seals, Cartridge Seals, Agitator seals, Dry Gas Seals and Split Seals.
To great our service, we present the products and solutions while using the very good top quality at the reasonable cost for Metal Bellow Mechanical Seals. To ensure you get what exactly you need, our professional team will help you work through all the details straight to your target. With our powerful team support, you would not have to worry about anything. Our company establishes the management system in strict accordance with the requirements of international standards and makes detailed after-sales service commitment.
1. who are we? Are you trading company or manufacturer ?
We are manufacturer.We are based in Hangzhou, China, start from 2010,sell to Domestic Market(33.00%),North America(15.00%),South America(10.00%),Western Europe(8.00%),Eastern Europe(6.00%),Souther Europe(6.00%),Southeast Asia(5.00%),Mid East(5.00%),Northern Europe(5.00%),Oceania(2.00%),South Asia(2.00%),Africa(00.00%),Eastern Asia(00.00%),Central America(00.00%). There are total about 51-100 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production; Always final Inspection before shipment;
3.what can you buy from us?
PTFE Seals/Oil Seals/O Rings/Rubber Seals/Plastic Seals/Mechanical Seal/O-RING/ RING Seals.
4. why should you buy from us not from other suppliers?
Beseals is a professional manufacturer of seals .Our company specializes in the production of PU, PTFE, rubber and metal sealing components
5. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
6.Do you provide samples ?
is it free or extra ? Yes, we could offer the sample for free charge but you need to pay the cost of freight.
7. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FAS,CIP,FCA,Express Delivery;
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For more information, please contact us. We look forward to your arrival
Audited Supplier 
Double end, multiple springs, balanced, independent rotary direction, still structure, clamp transmission and cartridge seal.
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