Metal Bellow Sseals
Metal bellow seals offer distinct advantage in high temperature application. A bellow core constructed by welding number of metal diaphragms together eliminates the need for springs, providing more flexibility to the seal face compensating for seal face wear.
SERIES: AMMBO
Series AMMBO are widely used in refining, petrochemicals and chemical industries. Static o-ring is used as a secondary member. The absence of dynamic o- ring prevents possibility of seal hang-up. Centroid loaded face design increases seal life by avoiding seal face distortion caused due to thermal expansion and also ensures optimum face flatness over a wide operating condition. As a standard, AM350 bellow cores are used. For chemical compatibility Alloy C-276 or Alloy 718 bellow cores can be used.
Seal Characteristics
- Single Seal
- Balanced
- Metal Bellows
- Independent on direction of rotation
Applications
- General chemicals
- Petrochemicals
- Refineries
Operating Limits
- Shaft Diameter - d1 : 18…100mm
- Pressure - p : 22 bar (max)
- Temperature - t : -20…220°C
- Velocity - v : 20m/sec
Materials
- Seal Faces : Ceramic, SIC, Tungsten Carbide
- Metal Parts : SS304, SS316 Carpenter 42, Hastelloy-C, Alloy20
- O-ring: Elastomers, PTFE
SERIES: PTMBG
Series PTMBG seals specially designed for high temperature application and suitable for high startup toque since the bellows unit is independent of torque transmission. Grafoil is used as a secondary member having excellent temperature range upto 400°C. Shrunk fit seal face design minimize face distortion restricting leakage and wear rate to very low level under a wide range of condition.
Seal Characteristics
- Single Seal
- Balanced
- Metal Bellows
- Independent on direction of rotation
Applications
- High temperature applications
- Petrochemicals
- Refineries
Operating Limits
- Shaft Diameter - d1 : 18…100mm
- Pressure - p : 20 bar (max)
- Temperature - t : -20…220°C
- Velocity - v : 20m/sec
Materials
- Seal Faces : Ceramic, SIC, Tungsten Carbide
- Metal Parts : SS304, SS316 Carpenter 42, Hastelloy-C, Alloy20
- Packing: Grafoil
