Static Seals for Hydraulic and Pneumatic Applications
Static seals are critical components used to prevent leakage between two non-moving surfaces in hydraulic and pneumatic systems. Unlike dynamic and static seals that manage motion-related sealing, static seals provide a reliable barrier in fixed assemblies, ensuring consistent pressure retention, leak prevention, and contamination control.
O-Rings
remain the most widely used static seals, offering a simple yet highly effective solution for sealing non-moving interfaces.
Gaskets
provide flat sealing between two mating surfaces, ideal for flanged connections.
Bonded Seals
combine a metal washer with an elastomeric element for added strength and sealing precision in high-pressure environments.
Static Face Seals
are applied where sealing occurs perpendicular to the mating surfaces.
Materials
Nitrile Rubber (NBR)
Good resistance to oils and fuels, cost-effective.
Viton (FKM)
High-temperature resistance and excellent chemical compatibility.
Silicone
Good temperature resistance and flexibility.
EPDM
Excellent for water and weather resistance.
Applications
Hydraulic and Pneumatic Cylinders
Sealing between the cylinder head and body, or between ports and the cylinder.
Valves
Sealing between valve body components.
Pumps
Sealing between pump housing and stationary parts.
Key Features and Benefits
Leakage Prevention
Effectively prevent fluid or gas leakage between stationary parts.
Pressure Maintenance
Help maintain system pressure by preventing loss of hydraulic fluid or pneumatic air.
Contamination Control
Prevent external contaminants from entering the system.
Simplified Design
Often simpler in design compared to dynamic seals.
Selecting the Right Seal
Operating Pressure
The maximum pressure the seal needs to withstand.
Fluid Compatibility
The type of fluid or gas the seal will be in contact with.
Temperature Range
The range of temperatures the seal will be exposed to.