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Type 55 mechanical seal

Type 55 seals (also known as Burgmann B01 or BT-AR) are widely used generally for smaller domestic pumps and for water transfer pumps. They are a non-pusher type seal that uses an integrated bellows and shaft seal that seals in the pressure at the impellor end of the mechanism. A short spring assists the bellows in tensioning the seal face against the stationary but they don’t have very much flex in this mechanism so are limited to both application and operating pressure. The rotary face is commonly carbon graphite based but can also be available in silicone carbide and tungsten carbide. The stationary face is normally ceramic but can also come in silicone or tungsten carbide. They can handle dirty or contaminated water due to the use of a bellows. They are also able to handle operating pressures up to 600kpa (6 Bar). Type 55 seals are stocked by Rural Pumps in only a couple of common small metric sizes but can be ordered in up to 70mm, we have Type 55 seals IN STOCK HERE in our webshop.

Operating Limits: Temperature: -30°~200°C  |  Pressure: ≤0.6 MPa  |  Speed: ≤10 m/s

Please contact us if you are looking for something unusual or use our pump selector in our webshop to get a replacement seal for your pump.