Custom Rotary Shaft Seals for Oscillating Equipment

Rotary shaft seals are used to seal lubrication fluids in rotating or oscillating parts. These seals prevent the ingress of water and contaminants in hydraulic equipment and rotary components. These components are often exposed to contaminants, which affect their performance and service life.

SSP Seals specializes in rotary shaft seal manufacturing, which serves as the solution for these problems. These seals help retain lubrication on seals and improve the service life of bearing, and contribute to the system’s overall performance. Our rotary shaft sealing solutions are chosen for both MRO and OEM requirements. Our well-equipped facility, field support, R&D, and customer service enable us to meet diverse industry requirements with ease.

Rotary Shaft Seal Materials:

Rotary shaft seals are designed using the following materials:

Steel: Stainless steel and carbon steel shows high strength, corrosion resistance, and wear resistance. These materials are comparatively more affordable than other materials on this list. Long-term performance combined with affordability makes this material a common choice for rotary shaft steel.
Nitrile Rubber (NBR): This is one of the popular materials used for making rotary shaft seals. The material exhibits excellent resistance to alkali, fuel, and oil solutions. Nitrile Rubber can resist hydrocarbon solvents, as well as petroleum-based hydraulic fluids. Rotary shaft seals made of NBR can be operated across a vast temperature range from -20 to 250 degrees Fahrenheit.
Silicone Rubber (MVQ): The material is usually recommended for low friction applications operated at high temperatures. Silicone rubber seals can resist ozone, weather, bases, water, and alcohol. Shaft seals made of this material is not recommended for applications where aromatic, aliphatic, and halogenated hydrocarbons, polar solvents, and esters are present.
Ethylene-propylene Rubber (EPDM): The seals made of this material offer excellent ozone, sunlight, and heat resistance. It can resist water and steam and is often preferred over other sealing materials on this list for applications where different solvents can be a problem. EPDM is not recommended for petroleum-based products. It exhibits excellent mechanical properties between -60 to 300 degrees Fahrenheit.
FPM: This is the ideal material for applications where high temperatures are involved. The seals made of fluorinated rubber-like FPM can be operated in temperatures between -20 and 200°C (-4° to 392 °F). They can easily withstand dissolvent and acids.

In addition to the above materials, we provide these seals in the following materials:

Brass
Aluminum

Custom Rotary Shaft Seal Design:

Whether it is rotary shaft seals for oscillating equipment or any other equipment, we can customize them according to your requirements. If needed, we can customize rotary shaft seals to the following specifications.

Outside Diameter
Dimensions
Garter Springs
Auxiliary Lips
Axial Movement

Permissible Speeds
Lubrication
Friction
Housing Bore
Chemical & Thermal Resistance

Industries and Applications

The versatile design, beneficial features, and custom options allow rotary shaft seals to be used in a variety of industries and applications:

Casters
Casters
Rolling Mills
Gear Pumps
Compressors

Wheel Hubs
Crank Shafts
Drilling Spindles

Rotary Shaft Seal Selection Criteria:

Rotary shaft seals are designed using the following materials:

Environment: Although designed for harsh operating environments, the seals may not last long if the proper choice isn’t made. If there are chemicals, dust, dirt, or other contaminants present, make it a point to choose the shaft seal, which has a seal lip made of special material. This will help increase the shelf life of the seal.
Operating Temperatures: The consideration of the right seal material will be influenced by operating temperatures, among various factors. For instance, if the seal is to be operated in temperatures above 212 °F, you need to use the FKM material. If you wish to use it across a broad temperature range, say -20 to 250 °F, then NBR is the best choice.
Lubrication: The choice of the correct seal will depend on the type of lubricant media. If the shaft seal comes in contact with grease, then NBR is the best choice for the shaft seal. If the shaft seal comes in with dissolvent and acids, then FKM is the right seal material.
Operating Load: This term refers to the factors that are imposed on the system under dynamic environmental conditions, including internal and external pressures, buoyancy, thermal expansion, contraction, and so on. If the shaft is exposed to irregular forces then seals with a large diameter are preferred.
Shaft Eccentricity: Rotary shaft seals are designed to accept some ranges of shaft deviation from its center. If the shaft seal is operated beyond this condition, it will crush its lip and cause wear and tear. Thus, the limits of the seal must be checked.
Shaft Surface Finish: The performance and shelf life of the seal depend on the surface finish. The shaft surface features valleys and peaks. If the surface finish is too rough or too smooth, this will lead to wear and tear. Thus, you must check the manufacturer’s finish and surface roughness specifications. Ensure the specifications comply with industry standards.

Contact us to learn more about rotary shaft seals or call +1-888-238-SEAL to know more about rotary shaft seals or other seals in our inventory.