High Performance Pneumatic Piston Seals for Cylinders and Actuators

If you’ve ever dealt with a pneumatic cylinder losing power, slow actuator
movement, or air leakage in a production line, chances are the issue wasn’t in
the hardware or programming—it was the seal.

Pneumatic piston seals might be small, but they do a big job. They’re
responsible for keeping compressed air where it needs to be, resisting pressure
changes, and ensuring every piston stroke happens without a hitch. In systems
running thousands of cycles per day, a weak seal doesn’t just affect
performance—it costs downtime, energy, and in some cases, even product loss.

We’ve spent decades working with customers who rely on air-powered systems.
That includes companies building automation equipment, operating textile lines,
or managing industrial robots. The common question we hear is: "Do you have
something that fits right, lasts longer, and doesn’t give us trouble down the
line?”

Our answer: Yes. And it starts with a deep understanding of how pneumatic
piston seals behave in real machines—not just on paper.

Built from the Right Material for the Right Reason

We manufacture our pneumatic seals using NBR (nitrile rubber)

NBR has the flexibility needed to create a tight seal, even when cylinders
aren’t perfectly aligned. It can handle the friction from back-and-forth
motion. And it resists air pressure without hardening or cracking prematurely.
If you’re using dry air, or systems with occasional lubrication, NBR does the
job well. In fact, many of the world’s top seal manufacturers still rely on
NBR for pneumatic applications.

What we’ve done is fine-tune our piston seal profiles and quality control to
ensure the best fit for your cylinders, valves, compressors, or actuators.

Here’s where we most often see the DEDE pneumatic piston seals series in
action:

· In linear actuators moving packaging equipment across high-speed lines

· Inside robotic arms, where space is limited and the seal must stay effective
through constant cycles

· In automatic valves controlling air distribution in complex machinery

· Within pneumatic presses, where sealing must withstand quick, repeated
bursts of pressure

· In low-noise systems, where low-friction operation reduces vibration and
wear

In every one of these systems, a piston seal that’s even slightly worn can
throw off performance. That’s why our customers look for sealing parts that
are easy to install, dependable from the first cycle, and don’t demand
constant adjustment or lubrication.

What Makes DEDE Different?

We’re not just selling sealing rings—we’re supporting production uptime.
Here’s how:

· In-stock availability: Over 10,000 common sizes and profiles ready to ship
through our DEDE platform

· Customization: Need a specific profile, tighter tolerance, or non-standard
size? We can handle that from material selection through final production

· 30+ years of sealing experience: Our team understands the interaction
between seal, cylinder, and system—so we help you choose smarter

· Reliable manufacturing: All products are made in our own facility, allowing
us to monitor consistency and quality from start to finish

More Than Just Rubber

A lot of companies make seals. What sets us apart is that we’re known for
real-world problem solving.

One customer came to us needing a piston seal for a fast-moving actuator inside
a bottling line. They had issues with seals from other suppliers breaking down
within weeks. Our engineers took a closer look—not just at the seal, but at
the movement speed, air pressure, and mounting surfaces.

We recommended a slightly modified lip profile, same NBR material, but with
improved surface contact. After switching to our version, their replacement
interval extended from 3 weeks to over 6 months.

That’s the difference a right-fit seal can make.

We’re proud that DEDE seals are now used in machines operating in over 80
countries. We provide support not only to large OEM, but also to local
maintenance teams and system integrators.

If you’re tired of replacing pneumatic seals every few months, or if you’ve
struggled to find a seal that fits your design without excessive rework, it
might be time to talk to us.

DEDE is pneumatic piston seal series isn’t a luxury—it’s a solution built on
practical experience, time-tested materials, and service that goes beyond the
catalog.

Let’s make your machines run smoother, longer, and with fewer interruptions.
We’ll handle the sealing—so you can focus on production.

Minimum Order: 500 pieces

Click to Enlarge