Product range

Pneumatic Seals for Smooth, Consistent Motion

Low-friction piston seals, rod seals, wipers and cushioning seals for pneumatic cylinders and valves.

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Fig. — Pneumatic Seals · schematic, not to scale

Overview

About Pneumatic Seals

Pneumatic cylinders and valves work with compressed air at comparatively low pressure and often at high cycle rates. Seals for this duty are designed for low friction, smooth starting and good performance with minimal lubrication.

Sealing Technologies supplies pneumatic piston seals, rod seals, rod seal and wiper combinations, cushioning seals and static seals for industrial automation and general plant equipment. Tell us the cylinder size and operating conditions and we will help identify a suitable seal.

Product range

Pneumatic Seals — Profiles and Specifications

Sizes and ratings are confirmed against your application. Where a value is not listed, it is available as per application requirement.

Pneumatic Piston Seals

Low-friction lip seals for the pistons of pneumatic cylinders, in single- and double-acting designs.

Low breakaway friction
Flexible lip design
Single- or double-acting

Bore Diameter: Available as per application requirement.
Groove Dimensions: Available as per application requirement.
Material: NBR, polyurethane, FKM — as per application
Temperature: Depending on compound, design and application.
Pressure: Depending on compound, design and application.
Application: Pneumatic cylinder pistons

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Pneumatic Rod Seals

Seal the piston rod of pneumatic cylinders with low friction and smooth, consistent movement.

Low-friction sealing lip
Smooth starting
Suited to limited lubrication

Rod Diameter: Available as per application requirement.
Groove Dimensions: Available as per application requirement.
Material: NBR, polyurethane, FKM — as per application
Temperature: Depending on compound, design and application.
Pressure: Depending on compound, design and application.
Application: Pneumatic cylinder rods

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Rod Seal & Wiper Combinations

A single component that combines the rod sealing lip and the wiper lip, saving space in compact cylinders.

Seal and wiper in one part
Compact gland design
Simple installation

Rod Diameter: Available as per application requirement.
Groove Dimensions: Available as per application requirement.
Material: NBR, polyurethane — as per application
Temperature: Depending on compound, design and application.
Pressure: Depending on compound, design and application.
Application: Compact pneumatic cylinders

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Cushioning Seals

Seal the cushioning chamber at the end of stroke so that the piston decelerates smoothly.

End-of-stroke damping
Integrated non-return function in many designs
Reduces impact and noise

Size: Available as per application requirement.
Groove Dimensions: Available as per application requirement.
Material: Polyurethane, NBR — as per application
Temperature: Depending on compound, design and application.
Pressure: Depending on compound, design and application.
Application: Cylinder end cushioning

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O-Rings & Static Seals

O-rings and static seals for valve bodies, end caps, ports and fittings in pneumatic systems.

Valve, cap and port sealing
Wide size range
Material matched to the application

Size: Available as per application requirement.
Material: NBR, FKM, silicone — as per application
Temperature: Depending on compound, design and application.
Pressure: Depending on compound, design and application.
Application: Valves, end caps and ports

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Questions

Frequently Asked Questions

How do pneumatic seals differ from hydraulic seals?

Pneumatic seals work at comparatively low pressure with air as the medium, so they are designed for low friction and limited lubrication. Hydraulic seals are designed to hold fluid at much higher pressure and to resist extrusion.

What details are needed to identify a pneumatic seal?

Cylinder bore and rod diameter, groove dimensions, the seal profile and the operating conditions. A sample or photograph of the existing seal is also helpful.

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Need help selecting a seal from this range?

Share the seal size, a drawing or the operating conditions. Our sales engineers will help identify a suitable sealing solution and send you a quotation.

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