Simering BO/BS

Simmering BO/BS

Simmering BO/BS is a sealing ring with a metal casing and two sealing lips, one of which – the working lip – is equipped with a pressure spring, while the other serves as a dust lip (without a spring). The outer metal surface ensures precise and rigid fitting in the housing, which is particularly important in applications exposed to high temperatures, intense mechanical loads, and aggressive media. The dust lip effectively protects against external contaminants such as dust, water, or metal shavings, increasing the lifespan of the entire sealing system.

BO/BS type simmerings are used in demanding drive systems, industrial machinery, gearboxes, engines, and hydraulic units. Depending on the working medium, variants made of NBR or FKM elastomers are available, resistant to oils, greases, fuels, chemicals, and high temperatures. This solution is ideal for applications where not only pressure sealing matters, but also effective protection of the mechanism from external factors.

Simmering BO/BS NBR - Technical Data
 

Operating Temperature Range: -40°C to +100°C 

Maximum Rotational Speed: 12 m/s

Pressure: 0.5 MPa

Good resistance to:

• mineral oil-based oils and greases
• vegetable and animal oils and fats
• hydraulic oils H, H-L, H-LP
• silicone oils and greases
• aliphatic hydrocarbons
• hydraulic fluids HFA, HFB, HFC
• water (up to +80°C)

Simmering BO/BS  FKM - Technical Data

Operating Temperature Range: -25°C  to +200°C 

Maximum Rotational Speed: 35 m/s

Pressure: 0.5 MPa

Good resistance to:

• mineral oil-based oils and greases
• vegetable and animal oils and fats
• silicone oils and greases
• fuels
• nonpolar solvents
• aliphatic, aromatic, and chlorinated hydrocarbons
• hydraulic fluids HFD
• fuels
• ​ozone, atmospheric conditions, aging

Simmering BO/BS  VMQ

Operating Temperature Range: -60°C to +200°C

Good resistance to:

• animal and vegetable oils and fats
• aliphatic motor and gearbox oils
• water (up to + 100°C)
• ozone, atmospheric conditions, aging​

Simmering BO/BS  ACM

Operating Temperature Range: -20°C to +150°C

Good resistance to:

• mineral oil-based engine, gearbox, and ATF oils
• ozone, atmospheric conditions, aging

Simmering BO/BS  EPDM

Operating Temperature Range:

• -45°C to +130°C (sulfur-cured)
• -55°C to +150°C (peroxide-cured)
   

Good resistance to:

• ozone, atmospheric conditions, aging
• silicone oils and greases
• many organic and inorganic acids and bases
• polar solvents (e.g., alcohols, ketones, esters)
• hot water and steam
• glycol-based brake fluids (special variants required)

Simmering BO/BS  HNBR

Operating Temperature Range: -30°C to +150°C

Good resistance to:

• mineral oil-based oils and greases
• vegetable and animal oils and fats
• hydraulic oils H, H-L, H-LP
• silicone oils and greases
• aliphatic hydrocarbons
• hydraulic fluids HFA, HFB, HFC
• water (up to +80°C)

Simmering BO/BS  - Typical Applications

• industrial gearboxes
• internal combustion and electric engines
• pumps
• drive systems
• construction machinery
• agricultural machinery
• heavy industry machinery
• wind energy generators
• household appliances